The extent to which an enzyme retains its structural conformation or its activity when subjected to storage, isolation, and purification or various other physical or chemical manipulations, including proteolytic enzymes and heat.
Presence of warmth or heat or a temperature notably higher than an accustomed norm.
The rate dynamics in chemical or physical systems.
Disruption of the non-covalent bonds and/or disulfide bonds responsible for maintaining the three-dimensional shape and activity of the native protein.
Genetically engineered MUTAGENESIS at a specific site in the DNA molecule that introduces a base substitution, or an insertion or deletion.
The facilitation of a chemical reaction by material (catalyst) that is not consumed by the reaction.
The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.
The chemical and physical integrity of a pharmaceutical product.
Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures.
Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations.
The characteristic 3-dimensional shape of a protein, including the secondary, supersecondary (motifs), tertiary (domains) and quaternary structure of the peptide chain. PROTEIN STRUCTURE, QUATERNARY describes the conformation assumed by multimeric proteins (aggregates of more than one polypeptide chain).
Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.
The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION.
The ability of a protein to retain its structural conformation or its activity when subjected to physical or chemical manipulations.
The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH = log 1/2[1/(H+)], where (H+) is the hydrogen ion concentration in gram equivalents per liter of solution. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
A species of gram-negative, facultatively anaerobic, rod-shaped bacteria (GRAM-NEGATIVE FACULTATIVELY ANAEROBIC RODS) commonly found in the lower part of the intestine of warm-blooded animals. It is usually nonpathogenic, but some strains are known to produce DIARRHEA and pyogenic infections. Pathogenic strains (virotypes) are classified by their specific pathogenic mechanisms such as toxins (ENTEROTOXIGENIC ESCHERICHIA COLI), etc.
Proteins prepared by recombinant DNA technology.
The extent to which an RNA molecule retains its structural integrity and resists degradation by RNASE, and base-catalyzed HYDROLYSIS, under changing in vivo or in vitro conditions.
A rigorously mathematical analysis of energy relationships (heat, work, temperature, and equilibrium). It describes systems whose states are determined by thermal parameters, such as temperature, in addition to mechanical and electromagnetic parameters. (From Hawley's Condensed Chemical Dictionary, 12th ed)
A heat stable DNA-DIRECTED DNA POLYMERASE from the bacteria Thermus aquaticus. It is widely used for the amplification of genes through the process of POLYMERASE CHAIN REACTION. EC 2.7.7.-.
A discipline concerned with studying biological phenomena in terms of the chemical and physical interactions of molecules.
Various material objects and items in the home. It includes temporary or permanent machinery and appliances. It does not include furniture or interior furnishings (FURNITURE see INTERIOR DESIGN AND FURNISHINGS; INTERIOR FURNISHINGS see INTERIOR DESIGN AND FURNISHINGS).
Methanes substituted with three halogen atoms, which may be the same or different.
Acute or chronic pain in the lumbar or sacral regions, which may be associated with musculo-ligamentous SPRAINS AND STRAINS; INTERVERTEBRAL DISK DISPLACEMENT; and other conditions.
In vitro method for producing large amounts of specific DNA or RNA fragments of defined length and sequence from small amounts of short oligonucleotide flanking sequences (primers). The essential steps include thermal denaturation of the double-stranded target molecules, annealing of the primers to their complementary sequences, and extension of the annealed primers by enzymatic synthesis with DNA polymerase. The reaction is efficient, specific, and extremely sensitive. Uses for the reaction include disease diagnosis, detection of difficult-to-isolate pathogens, mutation analysis, genetic testing, DNA sequencing, and analyzing evolutionary relationships.
Baked food product made of flour or meal that is moistened, kneaded, and sometimes fermented. A major food since prehistoric times, it has been made in various forms using a variety of ingredients and methods.
Nutritional supplements combining PROBIOTICS (bacteria) and PREBIOTICS (sugars).
The remnants of plant cell walls that are resistant to digestion by the alimentary enzymes of man. It comprises various polysaccharides and lignins.
A pouch or sac opening from the COLON.
A pouch or sac developed from a tubular or saccular organ, such as the GASTROINTESTINAL TRACT.
Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.
All of the divisions of the natural sciences dealing with the various aspects of the phenomena of life and vital processes. The concept includes anatomy and physiology, biochemistry and biophysics, and the biology of animals, plants, and microorganisms. It should be differentiated from BIOLOGY, one of its subdivisions, concerned specifically with the origin and life processes of living organisms.
A publication issued at stated, more or less regular, intervals.
A bibliographic database that includes MEDLINE as its primary subset. It is produced by the National Center for Biotechnology Information (NCBI), part of the NATIONAL LIBRARY OF MEDICINE. PubMed, which is searchable through NLM's Web site, also includes access to additional citations to selected life sciences journals not in MEDLINE, and links to other resources such as the full-text of articles at participating publishers' Web sites, NCBI's molecular biology databases, and PubMed Central.
Lists of persons or organizations, systematically arranged, usually in alphabetic or classed order, giving address, affiliations, etc., for individuals, and giving address, officers, functions, and similar data for organizations. (ALA Glossary of Library and Information Science, 1983)
"The business or profession of the commercial production and issuance of literature" (Webster's 3d). It includes the publisher, publication processes, editing and editors. Production may be by conventional printing methods or by electronic publishing.
Publications in any medium issued in successive parts bearing numerical or chronological designations and intended to be continued indefinitely. (ALA Glossary of Library and Information Science, 1983, p203)
Synthesized magnetic particles under 100 nanometers possessing many biomedical applications including DRUG DELIVERY SYSTEMS and CONTRAST AGENTS. The particles are usually coated with a variety of polymeric compounds.
Enzymes which are immobilized on or in a variety of water-soluble or water-insoluble matrices with little or no loss of their catalytic activity. Since they can be reused continuously, immobilized enzymes have found wide application in the industrial, medical and research fields.
Nanometer-sized particles that are nanoscale in three dimensions. They include nanocrystaline materials; NANOCAPSULES; METAL NANOPARTICLES; DENDRIMERS, and QUANTUM DOTS. The uses of nanoparticles include DRUG DELIVERY SYSTEMS and cancer targeting and imaging.
Inorganic or organic compounds containing trivalent iron.
A generic term for a variety of compounds that contain silicon, oxygen, and magnesium, and may contain hydrogen. Examples include TALC and some kinds of ASBESTOS.
An enzyme of the hydrolase class that catalyzes the reaction of triacylglycerol and water to yield diacylglycerol and a fatty acid anion. It is produced by glands on the tongue and by the pancreas and initiates the digestion of dietary fats. (From Dorland, 27th ed) EC
Messages between computer users via COMPUTER COMMUNICATION NETWORKS. This feature duplicates most of the features of paper mail, such as forwarding, multiple copies, and attachments of images and other file types, but with a speed advantage. The term also refers to an individual message sent in this way.
The oxygen-carrying proteins of ERYTHROCYTES. They are found in all vertebrates and some invertebrates. The number of globin subunits in the hemoglobin quaternary structure differs between species. Structures range from monomeric to a variety of multimeric arrangements.
A quantitative measure of the frequency on average with which articles in a journal have been cited in a given period of time.
The use of statistical methods in the analysis of a body of literature to reveal the historical development of subject fields and patterns of authorship, publication, and use. Formerly called statistical bibliography. (from The ALA Glossary of Library and Information Science, 1983)
The collection, writing, and editing of current interest material on topics related to biomedicine for presentation through the mass media, including newspapers, magazines, radio, or television, usually for a public audience such as health care consumers.
Anaerobic degradation of GLUCOSE or other organic nutrients to gain energy in the form of ATP. End products vary depending on organisms, substrates, and enzymatic pathways. Common fermentation products include ETHANOL and LACTIC ACID.
Fermented juice of fresh grapes or of other fruit or plant products used as a beverage.
Facilities equipped to carry out investigative procedures.
A general term for single-celled rounded fungi that reproduce by budding. Brewers' and bakers' yeasts are SACCHAROMYCES CEREVISIAE; therapeutic dried yeast is YEAST, DRIED.
Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)
Hemorrhagic and thrombotic disorders that occur as a consequence of abnormalities in blood coagulation due to a variety of factors such as COAGULATION PROTEIN DISORDERS; BLOOD PLATELET DISORDERS; BLOOD PROTEIN DISORDERS or nutritional conditions.

Phe161 and Arg166 variants of p-hydroxybenzoate hydroxylase. Implications for NADPH recognition and structural stability. (1/5593)

Phe161 and Arg166 of p-hydroxybenzoate hydroxylase from Pseudomonas fluorescens belong to a newly discovered sequence motif in flavoprotein hydroxylases with a putative dual function in FAD and NADPH binding [1]. To study their role in more detail, Phe161 and Arg166 were selectively changed by site-directed mutagenesis. F161A and F161G are catalytically competent enzymes having a rather poor affinity for NADPH. The catalytic properties of R166K are similar to those of the native enzyme. R166S and R166E show impaired NADPH binding and R166E has lost the ability to bind FAD. The crystal structure of substrate complexed F161A at 2.2 A is indistinguishable from the native enzyme, except for small changes at the site of mutation. The crystal structure of substrate complexed R166S at 2.0 A revealed that Arg166 is important for providing an intimate contact between the FAD binding domain and a long excursion of the substrate binding domain. It is proposed that this interaction is essential for structural stability and for the recognition of the pyrophosphate moiety of NADPH.  (+info)

Properties and regulation of human spermidine/spermine N1-acetyltransferase stably expressed in Chinese hamster ovary cells. (2/5593)

Spermidine/spermine N1-acetyltransferase (SSAT) appears to be the rate-limiting enzyme of polyamine catabolism, yet studies of its regulation have been limited by the low amounts of SSAT in uninduced cells. A system for studying SSAT was established by stably transfecting Chinese hamster ovary cells with a construct where SSAT cDNA was under control of the cytomegalovirus promoter. Thirteen of 44 clones expressed significantly increased SSAT activity (650-1900 compared with 24 pmol/min/mg protein in control cells). SSAT activity was directly proportional to SSAT protein, which turned over very rapidly (t(1)/(2) of 29 min) and was degraded through the ubiquitin/proteasomal pathway. The increased SSAT activity caused perturbations in polyamine homeostasis and led to a reduction in the rate of growth under clonal conditions. N1,N12-bis(ethyl)spermine greatly increased SSAT activity in controls and SSAT transfected clones (to about 10 and 60 nmol/min/mg protein, respectively). N1, N12-Bis(ethyl)spermine caused an increase in the SSAT half-life and a slight increase in SSAT mRNA, but these changes were insufficient to account for the increase in SSAT protein suggesting that translational regulation of SSAT must also occur.  (+info)

Stabilization from autoproteolysis and kinetic characterization of the human T-cell leukemia virus type 1 proteinase. (3/5593)

We have developed a system for expression and purification of wild-type human T-cell leukemia virus type 1 (HTLV-1) proteinase to attain sufficient quantities for structural, kinetic, and biophysical investigations. However, similar to the human immunodeficiency virus type 1 (HIV-1) proteinase, HTLV-1 proteinase also undergoes autoproteolysis rapidly upon renaturation to produce two products. The site of this autoproteolytic cleavage was mapped, and a resistant HTLV-1 proteinase construct (L40I) as well as another construct, wherein the two cysteine residues were exchanged to alanines, were expressed and purified. Oligopeptide substrates representing the naturally occurring cleavage sites in HTLV-1 were good substrates of the HTLV-1 proteinase. The kinetic parameters kcat and Km were nearly identical for all the three enzymes. Although three of four peptides representing HTLV-1 proteinase cleavage sites were fairly good substrates of HIV-1 proteinase, only two of nine peptides representing HIV-1 proteinase cleavage sites were hydrolyzed by the HTLV-1 proteinase, suggesting substantial differences in the specificity of the two enzymes. The large difference in the specificity of the two enzymes was also demonstrated by inhibition studies. Of the several inhibitors of HIV-1 or other retroviral proteinases that were tested on HTLV-1 proteinase, only two inhibit the enzyme with a Ki lower than 100 nM.  (+info)

Low temperature cycled PCR protocol for Klenow fragment of DNA polymerase I in the presence of proline. (4/5593)

A method for performing cycled PCR at low temperatures, using the thermolabile Klenow fragment of DNA polymerase I, is reported. Application of proline as a buffer additive in the range of 3.0-5.5 M remarkably increases the thermal stability of the polymerase and decreases the denaturation temperature of DNAtemplate. This method might be applicable to a broad spectrum of thermolabile DNA polymerases in cycled PCR and other methods of DNA amplification.  (+info)

Metal-catalyzed oxidation of phenylalanine-sensitive 3-deoxy-D-arabino-heptulosonate-7-phosphate synthase from Escherichia coli: inactivation and destabilization by oxidation of active-site cysteines. (5/5593)

The in vitro instability of the phenylalanine-sensitive 3-deoxy-D-arabino-heptulosonate-7-phosphate synthase [DAHPS(Phe)] from Escherichia coli has been found to be due to a metal-catalyzed oxidation mechanism. DAHPS(Phe) is one of three differentially feedback-regulated isoforms of the enzyme which catalyzes the first step of aromatic biosynthesis, the formation of DAHP from phosphoenolpyruvate and D-erythrose-4-phosphate. The activity of the apoenzyme decayed exponentially, with a half-life of about 1 day at room temperature, and the heterotetramer slowly dissociated to the monomeric state. The enzyme was stabilized by the presence of phosphoenolpyruvate or EDTA, indicating that in the absence of substrate, a trace metal(s) was the inactivating agent. Cu2+ and Fe2+, but none of the other divalent metals that activate the enzyme, greatly accelerated the rate of inactivation and subunit dissociation. Both anaerobiosis and the addition of catalase significantly reduced Cu2+-catalyzed inactivation. In the spontaneously inactivated enzyme, there was a net loss of two of the seven thiols per subunit; this value increased with increasing concentrations of added Cu2+. Dithiothreitol completely restored the enzymatic activity and the two lost thiols in the spontaneously inactivated enzyme but was only partially effective in reactivation of the Cu2+-inactivated enzyme. Mutant enzymes with conservative replacements at either of the two active-site cysteines, Cys61 or Cys328, were insensitive to the metal attack. Peptide mapping of the Cu2+-inactivated enzyme revealed a disulfide linkage between these two cysteine residues. All results indicate that DAHPS(Phe) is a metal-catalyzed oxidation system wherein bound substrate protects active-site residues from oxidative attack catalyzed by bound redox metal cofactor. A mechanism of inactivation of DAHPS is proposed that features a metal redox cycle that requires the sequential oxidation of its two active-site cysteines.  (+info)

Molecular cloning, sequencing, and expression of a novel multidomain mannanase gene from Thermoanaerobacterium polysaccharolyticum. (6/5593)

The manA gene of Thermoanaerobacterium polysaccharolyticum was cloned in Escherichia coli. The open reading frame of manA is composed of 3,291 bases and codes for a preprotein of 1,097 amino acids with an estimated molecular mass of 119,627 Da. The start codon is preceded by a strong putative ribosome binding site (TAAGGCGGTG) and a putative -35 (TTCGC) and -10 (TAAAAT) promoter sequence. The ManA of T. polysaccharolyticum is a modular protein. Sequence comparison and biochemical analyses demonstrate the presence of an N-terminal leader peptide, and three other domains in the following order: a putative mannanase-cellulase catalytic domain, cellulose binding domains 1 (CBD1) and CBD2, and a surface-layer-like protein region (SLH-1, SLH-2, and SLH-3). The CBD domains show no sequence homology to any cellulose binding domain yet reported, hence suggesting a novel CBD. The duplicated CBDs, which lack a disulfide bridge, exhibit 69% identity, and their deletion resulted in both failure to bind to cellulose and an apparent loss of carboxymethyl cellulase and mannanase activities. At the C-terminal region of the gene are three repeats of 59, 67, and 56 amino acids which are homologous to conserved sequences found in the S-layer-associated regions within the xylanases and cellulases of thermophilic members of the Bacillus-Clostridium cluster. The ManA of T. polysaccharolyticum, besides being an extremely active enzyme, is the only mannanase gene cloned which shows this domain structure.  (+info)

A cold-active glucanase from the ruminal bacterium Fibrobacter succinogenes S85. (7/5593)

We previously characterized two endoglucanases, CelG and EGD, from the mesophilic ruminal anaerobe Fibrobacter succinogenes S85. Further comparative experiments have shown that CelG is a cold-active enzyme whose catalytic properties are superior to those of several other intensively studied cold-active enzymes. It has a lower temperature optimum, of 25 degrees C, and retains about 70% of its maximum activity at 0 degrees C, while EGD has a temperature optimum of 35 degrees C and retains only about 18% of its maximal activity at 0 degrees C. When assayed at 4 degrees C, CelG exhibits a 33-fold-higher kcat value and a 73-fold-higher physiological efficiency (kcat/Km) than EGD. CelG has a low thermal stability, as indicated by the effect of temperature on its activity and secondary structure. The presence of small amino acids around the putative catalytic residues may add to the flexibility of the enzyme, thereby increasing its activity at cold temperatures. Its activity is modulated by sodium chloride, with an increase of over 1.8-fold at an ionic strength of 0.03. Possible explanations for the presence of a cold-active enzyme in a mesophile are that cold-active enzymes are more broadly distributed than previously expected, that lateral transfer of the gene from a psychrophile occurred, or that F. succinogenes originated from the marine environment.  (+info)

Purification and characterization of a novel peroxidase from Geotrichum candidum dec 1 involved in decolorization of dyes. (8/5593)

A peroxidase (DyP) involved in the decolorization of dyes and produced by the fungus strain Geotrichum candidum Dec 1 was purified. DyP, a glycoprotein, is glycosylated with N-acetylglucosamine and mannose (17%) and has a molecular mass of 60 kDa and an isoelectric point (pI) of 3.8. The absorption spectrum of DyP exhibited a Soret band at 406 nm corresponding to a hemoprotein, and its Na2S2O4-reduced form revealed a peak at 556 nm that indicates the presence of a protoheme as its prosthetic group. Nine of the 21 types of dyes that were decolorized by Dec 1 cells were decolorized by DyP; in particular, anthraquinone dyes were highly decolorized. DyP also oxidized 2,6-dimethoxyphenol and guaiacol but not veratryl alcohol. The optimal temperature for DyP activity was 30 degrees C, and DyP activity was stable even after incubation at 50 degrees C for 11 h.  (+info)

Author: Cesarini, Silvia et al.; Genre: Journal Article; Published in Print: 2012-12; Keywords: Cold-adapted lipase|br/|Rational design|br/|Saturation mutagenesis|br/|Enzyme improvement|br/|Pseudomonas; Title: A thermostable variant of P. aeruginosa cold-adapted LipC obtained by rational|br/|design and saturation mutagenesis
Germain, P. ; Lenders, JP. ; Guzman, LH. ; Crichton, Robert. The Immobilization of a Chemically Thermostabilized Beta-amylase.In: Archives Internationales de Physiologie et de Biochimie, Vol. 93, no. 3, p. B87-B87 (1985 ...
Highly thermostable DNA ligase for applications where ligation at high temperature is beneficial High thermostability allows ligation using high-stringency hybridization conditions High specificity and stringency permits sensitive detection of SNPs11... ...
Thermal stability increases down the group due to the decrease in the charge density of the metal cation. All group 2 metal ions have the same charge (2+) but the smaller ones at the top of the group have it all packed into a smaller space so they polarise the O-H bond more (pull electrons towards the oxygen). This means the O-H bond is already partly broken so it requires less heat to break fully. As you go down the group the O-H is less polarised by the larger group 2 cations with a lower charge density so the thermal stability increases ...
FAI uses thermal stability testing to collect certain data. For more information on this service, visit this page for the benefits.
in Protein Science : A Publication of the Protein Society (2000), 9(3), 466-75. In a general approach to the understanding of protein adaptation to high temperature, molecular models of the closely related mesophilic Streptomyces sp. S38 Xyl1 and thermophilic Thermomonospora fusca ... [more ▼]. In a general approach to the understanding of protein adaptation to high temperature, molecular models of the closely related mesophilic Streptomyces sp. S38 Xyl1 and thermophilic Thermomonospora fusca TfxA family 11 xylanases were built and compared with the three-dimensional (3D) structures of homologous enzymes. Some of the structural features identified as potential contributors to the higher thermostability of TfxA were introduced in Xyl1 by site-directed mutagenesis in an attempt to improve its thermostability and thermophilicity. A new Y11-Y16 aromatic interaction, similar to that present in TfxA and created in Xyl1 by the T11Y mutation, improved both the thermophilicity and thermostability. ...
Thermostable enzyme technology for algal bioconversion The present invention relates to thermostable enzyme systems suitable for use in the production of biofuels and bio-products from algae, and to a
The presence of lipases was observed in three byproducts of orange juice processing: peel, core and frit. The enzymes were characterised biochemically over a wide pH range from neutral (6-7) to alkaline (8-9). The optimal temperature for the activity of these byproducts showed wide range at 20°C to 70°C, indicating fairly high thermostability. The activities were monitored on p-NP-butyrate, p-NP-l ...
TITLE = {Prediction of Thermostability from Amino Acid Attributes by Combination of Clustering with Attribute Weighting: {A} New Vista in Engineering Enzymes ...
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High stability (median rotation 1.54°) 100% of the implanted lenses had ≤ 5° rotation from end of surgery to 4 - 6 months ...
TY - JOUR. T1 - Mutation of regulatory serines of rat tyrosine hydroxylase to glutamate. T2 - Effects on enzyme stability and activity. AU - Royo, Montserrat. AU - Fitzpatrick, Paul F.. AU - Daubner, S. Colette. PY - 2005/2/15. Y1 - 2005/2/15. N2 - Tyrosine hydroxylase is phosphorylated at four serine residues in its amino-terminus by multiple kinases. Phosphorylation of serine 40 by cAMP-dependent protein kinase results in alleviation of dopamine inhibition [J. Biol. Chem. 267 (1992) 12639]. The other serines are at positions 8, 19, and 31. The effect of phosphorylation at these serines has been investigated using mutated forms of tyrosine hydroxylase containing glutamates at the positions of the serines. The S8E, S19E, and S31E tyrosine hydroxylase variants have similar steady-state kinetic parameters and similar binding affinity for catecholamines to wild-type enzyme. The S8E, S19E, S31E, and S40E variants differ in stability at elevated temperatures. The S40E variant is the least stable, ...
Listing of all Polbase results with context for Reference: Thermostable DNA polymerases., Polymerase: Human Pol beta, Property: Molecular Weight
In vitro reconstitution of an artificial metabolic pathway has emerged as an alternative approach to conventional in vivo fermentation-based bioproduction. Particularly, employment of thermophilic and hyperthermophilic enzymes enables us a simple preparation of highly stable and selective biocatalytic modules and the construction of in vitro metabolic pathways with an excellent operational stability. In this study, we designed and constructed an artificial in vitro metabolic pathway consisting of nine (hyper)thermophilic enzymes and applied it to the conversion of glycerol to lactate. We also assessed the compatibility of the in vitro bioconversion system with methanol, which is a major impurity in crude glycerol released from biodiesel production processes. The in vitro artificial pathway was designed to balance the intrapathway consumption and regeneration of energy and redox cofactors. All enzymes involved in the in vitro pathway exhibited an acceptable level of stability at high temperature (60°C),
The long-standing problem of achieving high activity of a thermophilic enzyme at low temperatures and short reaction times with little tradeoff in thermostability has been solved by directed evolution, an alcohol dehydrogenase found in hot springs serving as the catalyst in enantioselective ketone reductions
How hot is too hot for life to survive? Ever since microbes were discovered squirming around in hydrothermal springs several decades ago, the limit of heat-loving (thermophilic) organisms has been a moving target. The current record-holder is strain 121, an archaeon isolated from the Mothra hydrothermal vent deep beneath the surface of the northeast Pacific Ocean; suitably enough, it can grow at a blistering temperature of 121 °C.. There are some physical limitations of biological activity at high temperature. Enzymes unfold, as rapid molecular bond vibrations tear intricate molecular structures apart, obliterating their functional capabilities. Individual amino acids lose their handedness as geometrical arrangements of molecular structures equilibrate with heat; since all known biological amino acids are right-handed, organisms must spend a lot more energy re-shaping amino acids to fit the template. DNA bases A and G falter at exponentially higher rates as the temperature goes up, ...
A device for diagnosing operation of an industrial process control or monitoring system includes an input configured to receive an input related to a process signal. A first statistical parameter module provides a first statistical parameter output related to a statistical parameter of the process signal. A filter provides a filter output related to a filtered value of the process signal. A second statistical parameter module provides a second statistical parameter output related to a statistical parameter of the filter output. A diagnostic module diagnoses operation of the industrial process based upon the first and second statistical parameters.
1A5Z: Lactate dehydrogenase from the hyperthermophilic bacterium thermotoga maritima: the crystal structure at 2.1 A resolution reveals strategies for intrinsic protein stabilization.
Industrial Processes and Waste Stream Management (Heftet) av forfatter Intelecom. Teknologi, transport og landbruk. Pris kr 1 369. Se flere bøker fra Intelecom.
Uncovering, elimination and prevention of contaminations in industrial processes by microbiological consulting based on VIT® gene probe technology
Buy Radioisotope Gauges for Industrial Process Measurements by Geir Anton Johansen (9780471489993) from Boomerang Books, Australias Online Independent Bookstore
Cellulose, Biomass, Cellobiose, Concentration, Glucose, Hydrolysis, Inhibition, Ethanol, Achievement, Bioreactor, Cellulase, Kinetics, Nature, Paper, Enzyme Stability, Enzymes, Membrane, Membranes, Set
Thermus sp. ATCC ® 700910™ Designation: Sa-01 TypeStrain=False Application: Reduces iron (ferric, FeIII) ferric iron Biotechnology
The study was performed at 15°C at the request of the Sponsor due to the known thermal instability of the test item. The buffers were equilibrated prior to initial sample preparation to a sub-test temperature of 10°C to assist in stability of the test item prior to starting the test period and extraction of the initial samples. Although the standard matrix blank contained no peak at the retention time of the test item, the sample matrix blank did. The peak in the sample blanks was subtracted from their relevant samples. Sample results were seen to be variable. This will partly have been due to sensitivity/detection variability with the analytical method, but the stability of the test item could also significantly affect the sample results. The test concentration was very close to the detection limit of the analytical method, so direct analysis was not possible. Hence, the samples were extracted to concentrate up and dissolve in a solvent the test item was substantially more hydrolytically ...
Thermal stability of FPase (triangles), endoglucanase (squares), and β-glucosidase (circles) produced by T. harzianum at 37°C (black and white symbols), 50°C
DIDAC EXPORT - Exporter, Manufacturer, Distributor & Supplier of Distance Piece 76 MM For High Stability Machines based in New Delhi, India
The Peltier Cooling Module for BioTeks Cytation 5 and Cytation 1 Cell Imaging Multi-Mode Readers helps maintain temperature stability inside the reading chamber, regardless of changes in ambient (room) temperature and heat produced by electro-mechanical operations within the reader.
Insa cea mai buna metoda de a ne feri de astfel de pericole este evitarea expunerii la soare in orele amiezii, atunci cand puterea ultravioletelor este la intensitate maxima. Arsurile sunt efectele expunerii pielii la soare. De fapt, Jonas și tumoarea sa erau la fel de diferiți unul de celălalt cum sunteţi voi de persoana de alături.
Culoarea anului este verdele Greenery - Pantone 15-0343TCX . Acesta simbolizeaza un nou inceput, regenerare si reconectarea cu natura. Nuanta anului Greenery o regasim in natura, de exemplu in culoarea merelor verzi, a frunzelor de iarba etc. Orice element de design care ne sugereaza sau reda natura este binevenit in amenajari. Verdele, regasit fie in piese de mobilier, tesaturi organice sau tapet, este bine pus in valoare de elemnete metalice, regasite in corpuri de iluminat cu finisaje de cupru argintii, aurii, etc ...
This robust radial fan is able to withstand constant operating temperatures up to 450°C and is designed for demanding environments
15 Oct 2015 Psoriazisul si legatura lui cu depresia - Psoriazisul este o afectiune de arbore de ceai este folosit ca un agent antiinflamator, ce poate ajuta.
In cazul metastazelor multiple tratamentul este in primul rand chimioterapic. Concluzii Virusul papiloma uman este responsabil de aproximativ o treime dintre cancerele induse de un agent infecţios. Citește și Radiatiile solare, fumul de tigara sau chimicalele din atmosfera ne pot modifica genele.
Uterul este un organ în formǎ de parǎ din sistemul de reproducere feminin. Este un organ ce gǎzduieşte şi protejeazǎ dezvoltarea fǎtului în timpul sar...
Domeniu de aplicare. Filtru de purificare a apei Aquator Economy este destinat filtrarii apei reci privenite din reteaua publica pentru imbunatatirea gustului si mirosurilor neplacute pastrand componentele naturale ale acesteia: oxigenul si sarurile minerale.. Este interzisa trecerea apei calde prin filtru.. Caracteristici constructive. ...
Suflu - Dictionar termeni medicali - Zgomot auzit la auscultatie, asemanand cu sunetul pe care il produce aerul care iese dintr-un burduf. Un suflu este produs prin accelerarea sau prin incetinirea brusca a circulatiei unui fluid. Diferite
Amfotericina b este utlizat in principal la pacientii cu infectii fungice progresive si posibil fatale.Parenteral:infectii fungice invazive
Cumpara rapid si simplu Naut Solaris. Naut Solaris este un produs natural, ce poate fi folosit ca ingredient in diverse preparate gustoase.
Cumpara rapid si simplu Tarate fine de Grau Solaris. Tarate fine de Grau Solaris este un produs naturist, ce poate constitui un ingredient pentru diverse retete
HERB-O-LAX este destinat tratarii cazurilor ocazionale de constipatie, care nu raspund la dieto-terapie; pregatire pre-operatorie.
Dezinfectant pregatit pentru utilizare, nu necesita diluare/preparare Descriere si folosire: Dezinfectantul Manorapid este foarte eficient pentru dezinfectarea si curatarea...
TY - JOUR. T1 - A molecular porous zirconium-organic material exhibiting highly selective CO2 adsorption, high thermal stability, reversible hydration, facile ligand exchange and exclusive dimerization of phenylacetylene. AU - Lee, Nam Hee. AU - Lee, Dong Woo. AU - Yeo, Hakmin. AU - Kwak, Kyungwon. AU - Chun, Hyang Sook. AU - Ok, Kang Min. PY - 2014/7/7. Y1 - 2014/7/7. N2 - A new molecular porous zirconium-organic material, Zr{[NC5H 3(CO2)2]2(OH2) 2}·1.3H2O (CAUMOF-12) has been synthesized by a hydrothermal reaction using Zr(NO3)4, 2,6-NC 5H3(CO2H)2, HNO3 and water at 180 °C. Single-crystal X-ray diffraction was used to determine the crystal structure of the reported material. Although the material can be classified as a molecular compound, CAUMOF-12 exhibits a pseudo-three- dimensional open-framework structure with void spaces obtained by intermolecular hydrogen bonds. CAUMOF-12 reveals differential gas adsorption characteristics and high thermal stability. Reversible hydration, facile ligand ...
Mono- and Stereopictres of 5.0 Angstrom coordination sphere of Iron atom in PDB 3pah: Human Phenylalanine Hydroxylase Catalytic Domain Dimer With Bound Adrenaline Inhibitor
Features of the formation of hydrogen bonds in solutions of polysaccharides during their use in various industrial processes. V.Mank a, O. Melnyk b a National University of life and environmental sciences
The EUs ROBOX Project aims to engineer enzymes to use as safer, less costly and much more environmentally friendly biocatalysts to drive industrial processes.
These short video clips illustrate industrial processes. They can be viewed online by students or downloaded for showing in class.
These short video clips illustrate industrial processes. They can be viewed online by students or downloaded for showing in class.
Presentation Summary Industrial heating methods Direct steam injection (DSI) basics Inherent properties for sustainability Case Studies - Thanks to all of you for the opportunity to speak with you regarding direct steam injection this afternoon. Ill begin with presenting the basics of direct verses indirect heating using conventional sludge heat exchangers as a reference point for presenting the benefits of DSI. Ill review internal modulation verses external modulation. Cover the advantages of DSI using hot water heat exchangers as a reference point. Ill show various digestion heating flow schemes using DSI. Present typical DSI heater dimensions and installations. Followed by specific digester benefits that can be realized with DSI and conclude with a summary and questions and answers.
Intrinsically heat stable enzymes can take the heat without a coat - naturally. The upward trend in commercial animal feed conditioning temperatures aims at improving pellet quality, as well as enhancing feed hygiene, and continually tests the stability limits of various feed additives. Enzymes are proteins and they tend to lose their catalytic activity or become denatured at high temperatures. The conditioning step of manufacturing pelleted feed presents the most challenging environment for the enzyme to survive without denaturing, and no two feed mills have exactly the same conditions. When considering adding enzymes to feed, it is important to look at all options to select the best, high-performing, heat stable enzymes.. ...
Thermostabilities of kanamycin nucleotidyltransferase and of its mutants that became thermostable, in the free state, because of single-amino-acid replacements were studied after immobilization of the enzymes on cyanogen bromide-activated Sephadex G-200 particles. Lys in place of Gln at position 102 decreased the thermostability of the immobilized enzyme, whereas replacement with other amino acids enhanced it. ...
Studies have shown that in a favorable nano environment, enzyme immobilization onto nanosupports could lead to increased enzyme stability and improved specificity, and could allow for prolonged enzyme functionality through chemical and physical treatment. Researchers also have shown that immobilization onto carbon-based nanosupports can increase the enzyme turnover and allow for prolonged enzyme-based conjugates isolation and usage. In new work, researchers have now taken another step towards the detailed characterization and optimization of enzyme-nanosupport interface reactions.
The GScript RTase is recombinant M-MLV RTase expressed in E. coli and purified to homogeneity. It has lower RNase H activity and high thermal stability. The enzyme is widely used to synthesize first-strand cDNA at temperatures up to 55°C with increased specificity, higher yields of cDNA, and more full-length product than other reverse transcriptases. It can generate cDNA from 100 bp to 12 Kb ...
View Notes - Enzyme Bio100L from BIO SOMETHING at UMBC. Determining the Optimum pH and Optimum Temperature for an Alpha-Amylase Enzyme (Corpulentus Martitus) Lenell Davis BIO 100L. Nov 05,
We Supply Enzyme like: 1.Glucoamylase(high activity) 2.Medium temperature alpha-Amylase(2000-3000u/ml) 3.Thermostable alpha-amylase(80000u/ml,120000u/g) 4.
In the presence of divalent metal ions (Zn2+, Co2+, and Ni2+) and at pHs above 8, duplex DNA forms a complex called M-DNA. M-DNA can be converted back to B-DNA by addition of EDTA or lowering the pH. The stability of M
CONICET Digital, el repositorio institucional del CONICET, un servicio gratuito para acceder a la producción científico-tecnológica de investigadores, becarios y demás personal del CONICET.
ELTR 1270 National Electrical Code Industrial Applications (4). Provides instruction in industrial applications of the National Electrical Code. Topics include: rigid conduit installation, systems design concepts, equipment installation (600 volts or less) and safety precautions.. ...
protein stability - posted in Protein and Proteomics: Hello everyone, After purifying a membrane protein, how do you know if its stable or functional. Can anyone suggest a paper or so to measure protein stability. Thanks!
Stabilities of the Purified Enzymes toward 10-DAXP.(a) Thermal stability of the 10-DAXP xylosidase activity of the two purified enzymes. (b) stability of the 10
The material and energetic utilization of by-products and residual products from industrial processes play a crucial role regarding the zero emission strategy. Substances can be extracted from respective residual products and can be directed towards an industrial application (new products, closing the cycle, etc.). In case material utilization cannot be granted, the residual products should be to a large extent liquefied and subsequently harnessed energetically (biogas, bioethanol). (CIB, 2018). ...
Search4Research - Enzymes in Industrial Applications Market 2023 Development Forecasts, Growth Drivers, Challenges and Regional Segment Analysis
Protein Stability | Scientific research info incl meetings, conferences, seminars, symposia,tradeshows,jobs,jobfairs, professional tips and more.
Our expertise enables us to offer advice when it comes to integrating innovative systems into your industrial processes.. We can therefore support the industry in complex matters such as natural man-machine interfaces or multimodal visual and interactive applications.. ...
构造稳定性 的翻译结果:tectonic stability;structural stability;geologic structure stability||双语例句|英文例句|相关文摘
Kloiber K, Spitzer R, Grutsch S, Kreutz C, Tollinger M*.. Longitudinal exchange: an alternative strategy towards quantification of dynamics parameters in ZZ exchange spectroscopy ...
This paper studies the multidimensional stability of planar traveling waves for integrodifference equations. It is proved that for a Gaussian dispersal kernel, if the traveling wave is exponentially orbitally stable in one space dimension, then the corresponding planar wave is stable in $H^m(\mathbb{R}^N)$, $N\ge 4$, $m\ge [N/2]+1$, with the perturbation decaying at algebraic rate.
BNX 2246 ( CAS 119-47-1 ) is a synergistic Hindered Phenols Blend from Mayzo that addresses applications requiring more long-term thermal stability.
Continuance este un nou concept realizat de un grup de designeri din, deloc surprinz?tor, China. Ace?tia au proiectat baterii de tipul AA care prezint? un port USB.. Se presupune c? bateriile sunt reînc?rcabile ?i pot înc?rca orice dispozitiv care se pot înc?rca prin USB. Dac? st?m s? ne gândim, aproape orice dispozitiv prezint? astfel de muf? în aceste zile. Bateriile ar fi perfecte pentru a înc?rca telefoanele mobile, consolele de jocuri, camere foto, GPS-uri sau chiar ?i tabletele.. Chiar dac? este doar un concept, se pare c? este unul foarte comod ?i practic, pe care to?i pasiona?ii de tehnologie l-ar aprecia. Pute?i vedea în galeria foto pozele cu acest concept.. Ce p?rere ave?i despre aceste baterii? Cât a?i fi dispu?i s? pl?ti?i pentru o astfel de baterie?. ...
Zinforo este un antibiotic. Ce este Zinforo? Zinforo este o pulbere care se reconstituie intr-o solutie perfuzabila (picurare in vena). Acesta contine substanta
Este poate cel mai popular site de rezervare a camerelor de hotel. Odata cu revolutia aplicatiilor mobile a aparut si aplicatia cu acelasi nume. Functionalitatea aplicatiei o mimeaza foarte bine pe cea a site-ului, utilizatorii avand posibilitatea sa caute hoteluri in functie de pret, zona, sa consulte galeriile foto si parerile altor utilizatori, precum si sa adauge filtre de cautare, precum WiFi sau posibilitatea de a te caza impreuna cu un animal de companie.. Aplicatia se bucura de mii de unitati de cazare verificate atat de catre, cat si de parerile utilizatorilor. Binenteles ca aplicatia este gratuita si poate fi descarcata de aici.. ...
Stroe a crit:Noua de ce nu ne faceti fisa ? Intreaba-l pe dr Dumitrescu sau profesorul K, ei este bulibasele homeopatiei, noi fraierii .
Pudra de macese raw bio 250g Pudra de macese este un antioxidant puternic. Contine mari cantitati de vitamina C. Este de 4-5 ori mai eficienta decat ceaiul de macese.Amestecati 1 lingurita de pulbere de...
Orice recomandare medicala continuta de acest material are scop informativ. Este timpul ca, odata cu venirea primaverii, sa ne modificam substantial alimentatia, care trebuie sa se bazeze in primul rand pe legume si verdeturi proaspete, specifice meniuri detoxifiere anotimp. Deşi este indicat să te îmbraci gros şi să transpiri, uneori o doză de frig extrem poate accelera detoxifierea.
Cum sa cumperi Winstrol în Canada legal pentru culturism? Puteţi obţine o reţetă? Poti cumpara din piata neagra? Care sunt preţurile steroizi?
Apilarnil Potent - continut complex de substante naturale, este biostimulator cu efect in special asupra functiei sexuale masculine. Produsul este trofic.
Inima este muşchiul care pompeză continuu oxigen si sânge în tot corpul. Fiecare bătaie a inimii este stimulată de semnale electrice care trec prin mu...
Sistemul imunitar este reprezentat de tesuturi derivate din mezoderm, a caror principala componenta celulara este limfocitul. De aici deriva
Localitatea este accesibila pe DN 12 sau pe linia CF 400 Bucuresti-Deda ; Baile Tusnad, Judetul Harghita, Romania; - Este amplasata aproape de soseaua principala si de centrul orasului ...
✅ Endocrinologie Galati - Centrul medical Pro-Clinic - Endocrinolog Galati - Este o ramură a medicinei care se ocupă cu diagnosticarea și tratamentul ...
Garsoniera Garsoniera Liliana Eforie Nord - descriere, imagini, telefon, pareri: 0730665533. Garsoniera Liliana e la numai 100 m de plaja si este complet
Such a disruption alters the folding pattern of the enzyme, ultimately compromising its stability and inhibiting its function ... FAD binding contributes significantly to overall enzyme stability. The acyl-CoA substrate is bound completely within each ... study of the effect of genetic defects on enzyme stability". Biochim. Biophys. Acta. 1690 (1): 22-32. doi:10.1016/j.bbadis. ... Differences in the enzyme occur based on the location of the active site along the amino acid sequence. ACADs are an important ...
"Polymer Degradation and Stability. 109: 416-429. doi:10.1016/j.polymdegradstab.2014.04.024.. ... Enzyme and Microbial Technology. Elsevier Inc. 38 (1-2): 148-154. doi:10.1016/j.enzmictec.2005.05.013.. ...
Tailoring enzyme activity and stability using polymer-based protein engineering. 34 (30), 7437-7443. Russell's work has led to ... Russell's initial research centered on enzymes and from that study, Russell and his team described the first use of enzymes in ... Russell's enzyme stabilization technology was singled out for the U.S. Army's Top Ten Greatest Invention Award and products ... In addition, the team was the first to describe the use of pressure to control enzyme activity in supercritical fluids, the ...
Integrated Enzyme Database (IntEnz). Amagase S, Nakayama S, Tsugita A (October 1969). "Acid protease in Nepenthes. II. Study on ... It is the only known protein with such a stability profile. The name nepenthesin was coined in 1968 by Shigeru Nakayama and ... Kubota K, Metoki Y, Athauda SB, Shibata C, Takahashi K (2010). "Stability Profiles of Nepenthesin in Urea and Guanidine ... Amagase S (July 1972). "Digestive enzymes in insectivorous plants. 3. Acid proteases in the genus Nepenthes and Drosera peltata ...
"Regulation of p53 stability and function by the deubiquitinating enzyme USP42". The EMBO Journal. 30 (24): 4921-30. doi:10.1038 ... Deacetylase enzymes, such as Sirt1 and Sirt7, can deacetylate p53, leading to an inhibition of apoptosis. Some oncogenes can ... Wulf GM, Liou YC, Ryo A, Lee SW, Lu KP (December 2002). "Role of Pin1 in the regulation of p53 stability and p21 ... As such, p53 has been described as "the guardian of the genome" because of its role in conserving stability by preventing ...
Enolization then occurs to reach the stability of the aromatic ring. The modified chain is transferred to the TE domain. This ... A POLYKETIDE BIOSYNTHETIC ENZYME FROM DRESCHLERA MONOCERAS: PURIFICATION AND PROPERTIES". J. Sci. Univ. Kelaniya. 3: 1-16. ... and cyclisases are shown as domains of the Monocerin PKS and methyl transferase is considered to be a tailoring enzyme. ... will allow lactonization and release from the enzyme. Hydroxylation occurs at ortho-position to two substituents. O-methylation ...
The stability of stored miRNA samples has been questioned. microRNAs degrade much more easily than mRNAs, partly due to their ... Most commonly, enzymes known as adenosine deaminases acting on RNA (ADARs) catalyze adenosine to inosine (A to I) transitions. ... Similar enzymes are encoded in animal genomes, but their roles have not been described. Several miRNA modifications affect ... Activity of TNFα in turbulent flow was measured by the expression of TNFα-converting enzyme (TACE) in blood. TNFα decreased if ...
This enzyme belongs to the family of hydrolases, specifically those acting on phosphoric monoester bonds. The systematic name ... Yeast phosphomonoesterase; isolation procedure and stability characteristics". J. Biol. Chem. 224 (2): 621-635. PMID 13405892. ... Boyer, P.D., Lardy, H. and Myrback, K. (Eds.), The Enzymes, 2nd ed., vol. 5, Academic Press, New York, 1961, p. 37-47. Tsuboi ... In enzymology, a glycerol-2-phosphatase (EC is an enzyme that catalyzes the chemical reaction glycerol 2-phosphate + ...
Serrano L, Kellis JT, Cann P, Matouschek A, Fersht AR (April 1992). "The folding of an enzyme. II. Substructure of barnase and ... the contribution of different interactions to protein stability". J. Mol. Biol. 224 (3): 783-804. doi:10.1016/0022-2836(92) ... Matouschek A, Serrano L, Fersht AR (April 1992). "The folding of an enzyme. IV. Structure of an intermediate in the refolding ... Serrano L, Matouschek A, Fersht AR (April 1992). "The folding of an enzyme. III. Structure of the transition state for ...
"Encapsulation of Single Enzyme in Nanogel with Enhanced Biocatalytic Activity and Stability". Journal of the American Chemical ... enhancing stability, and avoiding potential immunogenicity of proteins. Nanogels composed of polyethylenimine (PEI) have been ...
... and proline play key roles for collagen stability. They permit the sharp twisting of the collagen helix. In the ... Hydroxyproline is produced by hydroxylation of the amino acid proline by the enzyme prolyl hydroxylase following protein ... This modification of the proline residue increases the stability of the collagen triple helix. It was initially proposed that ... It was subsequently shown that the increase in stability is primarily through stereoelectronic effects and that hydration of ...
Wang, X; Minasov, G; Shoichet, BK (June 28, 2002). "Evolution of an antibiotic resistance enzyme constrained by stability and ... Thus, although the enzyme's activity is evolvable in the first sense, that does not mean that the enzyme's function is ... For example, consider an enzyme with multiple alleles in the population. Each allele catalyzes the same reaction, but with a ... For example, one reason many proteins are less robust to mutation is that they have marginal thermodynamic stability, and most ...
Marshall PN, Bentley SA, Lewis SM (1978). "Staining properties and stability of a standardised Romanowsky stain". J Clin Pathol ... Hempelmann E, Wilson RJ (1982). "Immunoprecipitation of malarial enzymes". Protozoology. 29: 637. Further reading Diagnosis and ... Gustav Giemsa improved this technique by standardizing the dye solutions and adding glycerol to increase stability. The ...
Wei H, Wang E (July 2013). "Nanomaterials with enzyme-like characteristics (nanozymes): next-generation artificial enzymes". ... High concentrations of phosphate severely decrease stability of horseradish peroxidase. In addition to biomedical applications ... horseradish peroxidase is one of the enzymes with important environmental applications. This enzyme is suitable for the removal ... Alone, the HRP enzyme, or conjugates thereof, is of little value; its presence must be made visible using a substrate that, ...
The derivative showed improved metabolic stability and excellent inhibition of the DPP-4 enzyme. However, it was also found to ... That led to improved potency but also loss of chemical stability. Efforts to improve chemical stability often led to loss of ... After hydroxylation on the adamantyl group they had a product with better microsomal stability and improved chemical stability ... Dipeptidyl peptidase-4 inhibitors (DPP-4 inhibitors) are enzyme inhibitors that inhibit the enzyme dipeptidyl peptidase-4 (DPP- ...
When temperature drops, the membrane fluidity, RNA and DNA stability, and enzyme activity change. These, in turn, affect ...
Due to the high specificity, stability, potency and affinity, as well as their flexible architecture, DARPins have a rigid body ... DARPins can be designed to act as receptor agonists, antagonists, inverse agonists, enzyme inhibitors, or simple target protein ... 100 g/L, and their high stability and solubility are considered desirable properties for drug compounds. DARPins can be ... The proteins exhibit high thermal and thermodynamic stability (denaturation midpoint: usually equilibrium unfolding: ∆G > 9.5 ...
By regulating the transcription of DNA sequences, the stability of RNA, and the capability of messenger RNA to be translated, ... Huang F, Yang Z, Yarus M (1998). "RNA enzymes with two small-molecule substrates". Chem. Biol. 5 (11): 669-678. doi:10.1016/ ... Processing of RNA influences protein expression by managing the transcription of DNA sequences, the stability of RNA, and the ... Kren BT, Steer CJ (1996). "Posttranscriptional regulation of gene expression in liver regeneration: role of mRNA stability". ...
"Rate limitation within a single enzyme is directly related to enzyme intermediate levels". FEBS Lett. 349: 131-134. doi:10.1016 ... He has 89 papers in his selected works: Dibrov, B.F., Zhabotinsky, A.M. & Kholodenko, B.N. (1982). "Dynamic stability of steady ... Kholodenko, B.N.; Lyubarev, A.E.; Kurganov, B.I. (1992). "Control of the metabolic flux in the system with high enzyme ... doi:10.1016/0014-5793(87)80298-3. Kholodenko, B.N. (1987). "Degree of stability of a metabolic chain with one feedback loop". ...
... is an enzyme that is classified both as a cathepsin and a carboxypeptidase. In humans, it is encoded by the CTSA ... The formation of this complex provides a protective role for stability and activity. It is protective for β-galactosidase and ... This gene encodes a glycoprotein that associates with lysosomal enzymes beta-galactosidase and neuraminidase to form a complex ... a direct evidence that a 46-kilodalton protein restores deficient enzyme activities in fibroblasts". Biochem. Biophys. Res. ...
As the enzyme is quite specific for monocytes and macrophages, determination of the presence of factor XIII may be used to ... Deficiency of this factor (FXIIID) affects clot stability. FXIIID, while generally rare, does occur, with Iran having the ... Factor XIII or fibrin stabilizing factor is an enzyme (EC of the blood coagulation system that crosslinks fibrin. ...
... are a source of enzymes that function under these harsh conditions. These enzymes have found many uses. For example, ... This stability makes them easier to use in structural biology. Consequently, the counterparts of bacterial or eukaryotic ... Such enzymes developed very early in life's history, indicating an early split from the other two domains. Archaeal lipid tails ... Enzymes from these thermophilic archaea also tend to be very stable in organic solvents, allowing their use in environmentally ...
Safety and stability[edit]. Diethyl ether is extremely flammable and may form explosive vapour/air mixtures.[31] ... A cytochrome P450 enzyme is proposed to metabolize diethyl ether.[28] Diethyl ether inhibits alcohol dehydrogenase, and thus ...
Mildly affected patients experience a compensated haemolytic anaemia because mutations affect stability of the enzyme. ... In eukaryotes, this is a homodimeric enzyme. The substrate-binding domain has a 3-layer alpha/beta/alpha structure. This enzyme ... Nevertheless, they are part of the ATP-grasp superfamily, which consists of 21 enzymes that contain an ATP-grasp fold. Each ... Glutathione synthetase (GSS) (EC is the second enzyme in the glutathione (GSH) biosynthesis pathway. It catalyses the ...
Upon removal of the calcium ions, the stability of the enzyme is reduced, but the proteolytic activity remains. Proteinase K ... Although calcium ions do not affect the enzyme activity, they do contribute to its stability. Proteins will be completely ... This enzyme belongs to Peptidase family S8. The molecular weight of Proteinase K is 28,900 daltons (28.9 kDa). Activated by ... The enzyme was discovered in 1974 in extracts of the fungus Engyodontium album (formerly Tritirachium album). Proteinase K is ...
It is also believed that the digestion of wood by enzymes initiates at the free hydroxyl sites - which is one of the principal ... N-terminal acetylation of proteins can affect protein stability but the results and mechanism is not very clear till now. It ... NatF is a newly identified NAT in 2011, which is composed with Naa60p enzyme. Till now, NatF is only found in higher eukaryotes ... Each of these different enzyme complexes is specific for different amino acids or amino acid sequences which is shown in the ...
This enzyme remains catalytically active under the neutral pH and has pH optimum between the pH values 6.0 and 7.5. Many ... lysosomal proteases are trapped inside the lysosome due to a problem with their stability. In contrast, cathepsin S remains ... In vitro, cathepsin S retains some enzyme activity in the presence of 3M urea. Cathepsin S is produced as a zymogen and is ... This enzyme has a critical role in antigen presentation. Major histocompatibility complex class II molecules interact with ...
... enzyme stability, and quaternary structure". Arch. Biochem. Biophys. 427 (2): 164-9. doi:10.1016/ PMID ... This enzyme belongs to the family of hydrolases, specifically those acting on phosphoric monoester bonds. The systematic name ... In enzymology, a lipid-phosphate phosphatase (EC is an enzyme that catalyzes the chemical reaction (9S,10S)-10- ... Srivastava PK, Sharma VK, Kalonia DS, Grant DF (2004). "Polymorphisms in human soluble epoxide hydrolase: effects on enzyme ...
... confers extra stability to β-lactamase enzymes produced by many Gram-negative bacteria. The extra stability to β-lactamases ... This group provides improved stability against certain beta-lactamase enzymes produced by Gram-negative bacteria. These ... bacterial enzymes rapidly destroy earlier-generation cephalosporins by breaking open the drug's beta-lactam chemical ring, ...
... kickstarted their studies by basing their project off of earlier research on the protease enzyme, renin.[5] They were the ones ... "Kinetic, stability, and structural changes in high-resolution crystal structures of HIV-1 protease with drug-resistant ... published a paper that showed the three-dimensional structure of HIV's protease enzyme.[5] Other researchers claim that this ...
Kōji-kin is an enzyme-secreting fungus.[15] In Japan, kōji-kin is used to make various fermented foods, including miso (a paste ... Sake has high microbiological stability due to its high content of ethanol. However, incidences of spoilage have been known to ... the kōji-kin spores germinate and release enzymes called amylases that convert the rice starches into glucose.[17] This process ...
The enzyme breaks the starch into oligosaccharides, which are then broken into glucose molecules by adding the enzyme ... improving its colour and stability. ... "The use of enzymes in starch hydrolysis". Archived from the ... The starch needs to be swelled to allow the enzymes or acid to act upon it. When grain is used, sulfur dioxide is added to ... α-amylase is secreted by various species of the bacterium Bacillus; the enzyme is isolated from the liquid in which the ...
The development of synthetic-enzyme based foaming agents, foam stability enhancing admixtures and specialised foam generating, ... The foaming agent used must be able to produce air bubbles with a high level of stability, resistant to the physical and ... The enzyme consists of highly active proteins of biotechnological origin not based on protein hydrolysis.[13] In recent years ... mixing and pumping equipment has improved the stability of the foam and hence foam concrete, making it possible to manufacture ...
The enzyme encoded by this gene is a member of the RAD51 protein family which assists in repair of DNA double strand breaks. ... The BCDX2 complex appears to act by facilitating the assembly or stability of the RAD51 nucleoprotein filament. The CX3 complex ... "MicroRNAs down-regulate homologous recombination in the G1 phase of cycling cells to maintain genomic stability". Elife. 3 ... "Mammalian ubiquitin-conjugating enzyme Ubc9 interacts with Rad51 recombination protein and localizes in synaptonemal complexes ...
In mammals this stability makes them resistant to the process of digestion and they can bioaccumulate in the liver. Of all the ... UV protectants and specific inhibitors of enzymes.[16][17] ...
... are a source of enzymes that function under these harsh conditions.[202][203] These enzymes have found many uses. For example, ... Engelhardt H; Peters J (1998). "Structural research on surface layers: a focus on stability, surface layer homology domains, ... Such enzymes developed very early in life's history, indicating an early split from the other two domains.[108] ... The search for organisms in extreme environments yields useful enzymes for industry". EMBO Rep. 2 (11): 968-71. doi:10.1093/ ...
H3K56Acx is required for genome stability.[88][89] H3K56 is acetylated by the p300/Rtt109 complex,[90][91][92] but is rapidly ... The same enzyme that phosphorylates the CTD also phosphorylates the Rad6 complex,[58][59] which in turn adds a ubiquitin mark ... Enzymes called peptidylarginine deiminases (PADs) hydrolyze the imine group of arginines and attach a keto group, so that there ... Histones are subject to post translational modification by enzymes primarily on their N-terminal tails, but also in their ...
Companies, such as Diversa, Novozymes, and Dyadic, are producing enzymes that could enable a cellulosic ethanol future. The ... They have several advantages over biodiesel, including good performance at low temperatures, no storage stability problems and ... are produced by the action of microorganisms and enzymes through the fermentation of sugars or starches (easiest), or cellulose ... The ethanol production methods used are enzyme digestion (to release sugars from stored starches), fermentation of the sugars, ...
Thermal stability and melting point depend on the liquid's components.[20] The thermal stability of a task-specific ionic ... Adam J. Walker & Neil C. Bruce (2004). "Cofactor-dependent enzyme catalysis in functionalized ionic solvents". Chemical ... Marek Kosmulski; Jan Gustafsson & Jarl B. Rosenholm (2004). "Thermal stability of low temperature ionic liquids revisited". ... Cao, Yuanyuan; Mu, Tiancheng (12 May 2014). "Comprehensive Investigation on the Thermal Stability of 66 Ionic Liquids by ...
Trifunctional enzyme subunit beta, mitochondrial (TP-beta) also known as 3-ketoacyl-CoA thiolase, acetyl-CoA acyltransferase, ... The encoded protein can also bind RNA and decreases the stability of some mRNAs. The genes of the alpha and beta subunits of ... "Trifunctional enzyme subunit beta, mitochondrial". Cardiac Organellar Protein Atlas Knowledgebase (COPaKB). Archived from the ... Middleton B (1994). "The mitochondrial long-chain trifunctional enzyme: 2-enoyl-CoA hydratase, 3-hydroxyacyl-CoA dehydrogenase ...
... sutures are normally treated with a chromium salt solution to resist body enzymes, to slow the absorption process, and ... and stability of intonation. ...
Stability and folding mechanism[edit]. SOD1 is an extremely stable protein. In the holo form (both copper and zinc bound) the ... The cytosols of virtually all eukaryotic cells contain an SOD enzyme with copper and zinc (Cu-Zn-SOD). For example, Cu-Zn-SOD ... Superoxide dismutase (SOD, EC is an enzyme that alternately catalyzes the dismutation (or partitioning) of the ... Superoxide is known to denature enzymes, oxidize lipids, and fragment DNA.[19] SODs catalyze the production of O2 and H2O2 from ...
... and the most biologically active are enzymes, particularly phospholipase A2.[78] ... syndrome is an example of selection working in opposite directions at the individual and group levels for the stability of the ...
Unequalled stability and sweetness of disposition' are said to have been among his domestic virtues, while in politics and ... François Jacob (1920-2013): French biologist who, together with Jacques Monod, originated the idea that control of enzyme ... Australian-British chemist who won the Nobel Prize in Chemistry in 1975 for his work on the stereochemistry of enzyme-catalysed ... French biologist who won the Nobel Prize in Physiology or Medicine in 1965 for discoveries concerning genetic control of enzyme ...
RNA as an enzyme[edit]. Further information: Ribozyme. RNA enzymes, or ribozymes, are found in today's DNA-based life and could ... DNA has better stability and durability than RNA; this may explain why it became the predominant storage molecule.[11] Protein ... RNA can act as a ribozyme, a special type of enzyme. Because it can perform the tasks of both DNA and enzymes, RNA is believed ... Such enzyme targeting is also responsible for gene down regulation though RNA interference (RNAi), where an enzyme-associated ...
For example, the gene encoding the enzyme that synthesizes penicillin is of no use to a fungus without the enzymes that ... Tokuriki N, Tawfik DS (October 2009). "Stability effects of mutations and protein evolvability". Current Opinion in Structural ... In enzymes, the protein structure orients a few, key amino acids into precise geometries to form an active site to perform ... For example, removing any member of the catalytic triad of many enzymes will reduce activity to levels low enough that the ...
Diaz-Almeyda E, Thome PE, Hafidi M, Iglesias-Prieto R (2010) Differential stability of photosynthetis membranes and fatty acid ... Rowan R, Whitney SM, Fowler A, Yellowlees D (1996) Rubisco in marine symbiotic dinoflagellates: Form II enzymes in eukaryotic ... seasonal genotypic surveys of coral-algal symbioses reveal prevalent stability or post-bleaching reversion. Mar Biol 148:711- ...
"XRCC1 phosphorylation by CK2 is required for its stability and efficient DNA repair". DNA Repair (Amst.) 9 (7): 835-41. PMID ... "Molecular cloning and expression of human cDNAs encoding a novel DNA ligase IV and DNA ligase III, an enzyme active in DNA ... "Deregulation of DNA double-strand break repair in multiple myeloma: implications for genome stability". PLoS ONE 10 (3): ... "Partial complementation of a DNA ligase I deficiency by DNA ligase III and its impact on cell survival and telomere stability ...
... functions as a cofactor for the following enzymes: *Three groups of enzymes (prolyl-3-hydroxylases, prolyl-4- ... This increases peptide hormone stability and activity.[99][100]. Pharmacokinetics[edit]. Absorption[edit]. From the U.S. ... This enzyme utilizes ascorbate to neutralize toxic hydrogen peroxide (H2O2) by converting it to water (H2O).[4][20] ... Two enzymes (ε-N-trimethyl-L-lysine hydroxylase and γ-butyrobetaine hydroxylase) that are necessary for synthesis of carnitine. ...
Studies with small numbers of patients (10-15) reported that lamotrigine increases sleep stability (increases the duration of ... phenytoin and other hepatic enzyme inducing medications may shorten half-life.[74] Dose adjustments should be made on clinical ... for use as monotherapy for treatment of partial seizures in adult patients when converting from a single enzyme-inducing ...
The group of enzymes responsible for addition of methyl groups to DNA are called DNA methyltransferases (DNMTs). The enzyme ... With increased stability of BACE1 mRNA resulting from BACE1-AS, more BACE1 mRNA is available for translation into BACE1 protein ... are enzymes responsible for the addition of acetyl groups, and histone deacetylases (HDACs) are enzymes responsible for the ... The enzymes responsible for the addition of methyl groups to histones are called histone methyltransferases (HMTs). The enzymes ...
It is an enzyme-directed site-specific process, as opposed to the non-enzymatic chemical reaction of glycation. Glycosylation ... The influence of glycosylation on the folding and stability of glycoprotein is twofold. Firstly, the highly soluble glycans may ... the cell relies on segregating enzymes into different cellular compartments (e.g., endoplasmic reticulum, cisternae in Golgi ...
The citric acid cycle is an 8-step process involving 18 different enzymes and co-enzymes.[6] During the cycle, acetyl-CoA (2 ... The initial phosphorylation of glucose is required to increase the reactivity (decrease its stability) in order for the ... From there the NADH and FADH go into the NADH reductase, which produces the enzyme. The NADH pulls the enzyme's electrons to ... ATP is synthesized by the ATP synthase enzyme when the chemiosmotic gradient is used to drive the phosphorylation of ADP. The ...
If this enzyme reaches a "hemimethylated" portion of DNA (where 5-methylcytosine is in only one of the two DNA strands) the ... Epigenetic control is often associated with alternative covalent modifications of histones.[57] The stability and heritability ... This enzyme utilizes a catalytically active site called the SET domain (Suppressor of variegation, Enhancer of zeste, Trithorax ... For example, acetylation of the K14 and K9 lysines of the tail of histone H3 by histone acetyltransferase enzymes (HATs) is ...
An aminoacyl-tRNA synthetase (aaRS or ARS), also called tRNA-ligase, is an enzyme that attaches the appropriate amino acid onto ... A widespread belief in the evolutionary stability of this superfamily, meaning that every organism has all the aaRSs for their ... That is, they violate the so-called canonical phylogenetic pattern shown by most other enzymes for the three domains of life - ... Mutations in the mitochondrial enzyme have been associated with a number of genetic disorders including Leigh syndrome, West ...
About 2% of all CP cases are inherited, with glutamate decarboxylase-1 being one of the possible enzymes involved.[4] Most ... Factors linked to handwriting include postural stability, sensory and perceptual abilities of the hand, and writing tool ...
... s (HMT) are histone-modifying enzymes (e.g., histone-lysine N-methyltransferases and histone-arginine ... Histone methylation is a principal epigenetic modification of chromatin[9] that determines gene expression, genomic stability, ... This interplay between the pre-SET domain and the catalytic core is critical for enzyme function.[1] ... Instead of SET, non-SET domain-containing histone methyltransferase utilizes the enzyme Dot1. Unlike the SET domain, which ...
Enzymes. Main article: Enzyme. The best-known role of proteins in the cell is as enzymes, which catalyse chemical reactions. ... stability, activity, and ultimately, the function of the proteins. Sometimes proteins have non-peptide groups attached, which ... Enzymes are usually highly specific and accelerate only one or a few chemical reactions. Enzymes carry out most of the ... The molecules bound and acted upon by enzymes are called substrates. Although enzymes can consist of hundreds of amino acids, ...
Such resistant varieties also tend to show stability, persisting after the fungicide has been removed from the market. For ... Sierotzki, Helge (2000) Mode of resistance to respiration inhibitors at the cytochrome bc1 enzyme complex of Mycosphaerella ... or acquire enzymes that enable metabolism of the fungicide to a harmless substance. ...
Taq stability - posted in Molecular Biology: Hi, I am wondering about the strict caution about enzyme storing at -20°C. ... This means that its stability is very high. Also, if we look at dishwashers liquid, all enzymes are kept at room temperature ... Manufacturers often say that we have to keep enzymes (e.g Taq) upon reception at -20°C. Yet, this enzyme is used in PCR at 95°C ... Enzyme: Taq stability. Started by Biog, Nov 21 2011 05:19 PM ... The enzymes in dishwashers etc are all stabilised or are forms ...
Ingredients specialist DSM is helping bakers target the lucrative health-conscious market with its newest enzyme product, ... DSM enzyme offers better high-fibre bread stability. By Catherine Boal 17-May-2007. - Last updated on 19-Jul-2008 at 14:32. GMT ... Amano Enzyme USA Co. , Döhler - Natural Food & Beverage Ingredients , Fonterra Co-operative Group Ltd , FrieslandCampina ... The enzyme is a cellulase compound which breaks down cellulose fibrils to promote better gluten development and proofing ...
Here, we present the enhanced enzyme stability by fusing the enzyme to a nano-particle-like cellulose binding domain (CBD) ... Enhanced Enzyme Stability through Fusion of Self-Assembled Cellulose Binding Domain. *Conference: Metabolic Engineering ... Enzyme stability has been a significant concern for protein engineers due to its industrial importance in biocatalytic ... here reveals a surprising means for the stabilization of enzymes and stresses the importance for improving stability of enzymes ...
Soil Enzyme Stability as an Ecosystem Indicator. EPA Grant Number: R826592. Title: Soil Enzyme Stability as an Ecosystem ... biotic enzymes, abiontic enzymes, humic-enzymes, fungal mycelium, substrate catalysis., RFA, Scientific Discipline, Ecosystem ... Temporal variability of the activity and stability of these enzymes will be done at three experimental sites in Oregon (located ... outlines the steps to fully develop and test the feasibility of exploiting soil enzyme activities or soil enzyme stability as ...
Improvement of an enzyme itself would effectively improve its properties. However, some novel materials or novel preparation ... The factors are divided into two categories: one is dependent on the improvement of enzyme properties, and the other, on the ... Examples have been provided principally aimed at improvements in membrane stability. ... factors that contribute to enhancing the stability of immobilized enzyme membranes have been indicated, and the solutions to ...
The performance characteristics of simple enzyme-based membrane-less hydrogen fuel cells running on non-explosive H2-rich air ... Pushing the limits for enzyme-based membrane-less hydrogen fuel cells - achieving useful power and stability L. Xu and F. A. ... Pushing the limits for enzyme-based membrane-less hydrogen fuel cells - achieving useful power and stability ... experiments with such an enzyme reveal good short-term performance due to restricted O2 access, but low long-term stability ...
For most industrial enzymes, kinetic stability (i.e. loss of biological activity), not thermodynamic stability (i.e. protein ... Enhanced Enzyme Kinetic Stability by Increasing Rigidity within the Active Site*. Yuan Xie,‡§ Jiao An,‡§ Guangyu Yang,‡ Geng Wu ... Because the kinetic stability of an enzyme is dependent on a subtle balance between the flexibility and rigidity of its active ... To further improve enzyme stability, the gene encoding L278M was used as a template for iterative saturation mutagenesis at the ...
Moreover, the immobilized CRL had excellent long-term storage stability (nearly 80% releative activity after storage for 13 ... have been widely used for immobilizing enzymes. As a result, the relative activity of [email protected]/AMP nanofiber-immobilized CRL ... In this paper we report a facile method for preparing co-immobilized enzyme and magnetic nanoparticles (MNPs) using metal ... days). This work indicated that metal-nucleotide nanofibers could efficiently co-immobilize enzymes and MNPs simultaneously, ...
Fermentation & Cellar Enzymes - Fining & Stability - Malolactic Bacteria - AiRD - Bioseutica - Lallemand. Scott Laboratories ...
Stability of haemoglobin and of certain endoerythrocytic enzymes in vitro D. Keilin, Y. L. Wang ... Stability of haemoglobin and of certain endoerythrocytic enzymes in vitro Message Subject (Your Name) has forwarded a page to ...
Fermentation & Cellar Enzymes - Fining & Stability - Yeast - Juice - AiRD - Lallemand - Proenol. Scott Laboratories provides ...
... ethanologenic enzymes) constitute over half of the cytoplasmic protein. In this study, transcript stability, functional message ... This transcript stability is proposed as an important feature in Z. mobilis that may distinguish highly expressed genes for ... in transcript stability are hypothesized to have evolved as a primary mechanism to balance the levels of individual enzymes ... a simple hypothesis based on mRNA stability.. J P Mejia, M E Burnett, H An, W O Barnell, K F Keshav, T Conway, L O Ingram ...
... with stability modulate innate and mutationally acquired drug resistance in bacterial dihydrofolate reductase enzymes. Nishad ... Structural stability is a major constraint on the evolution of protein sequences. However, under strong directional selection, ... Trade-offs with stability modulate innate and mutationally acquired drug resistance in bacterial dihydrofolate reductase ... Trade-offs with stability modulate innate and mutationally acquired drug resistance in bacterial dihydrofolate reductase ...
NKOSI, B.D. et al. Effects of bacterial inoculants and an enzyme on the fermentation quality and aerobic stability of ensiled ... The aerobic stability of LB+E silage was lower than LB treated silage. Using enzymes to increase the WSC content of crops that ... The aerobic stability of WCSS was improved with LB, while it was reduced with the homofermentative LP treatment compared with ... a combination of LB and enzyme. These treatments were ensiled in 1 L anaerobic jars for 25 days. The jars were opened on days 3 ...
Long term stability of cryopreserved human hepatocytes; evaluation of phase I and II drug metabolizing enzyme activities and ... Long term stability of cryopreserved human hepatocytes; evaluation of phase I and II drug metabolizing enzyme activities and ... Long term stability of cryopreserved human hepatocytes; evaluation of phase I and II drug metabolizing enzyme activities and ... Long term stability of cryopreserved human hepatocytes; evaluation of phase I and II drug metabolizing enzyme activities and ...
A team of brewing experts producing natural flavors and special brewing enzymes to help the brewers to produce new brands and ... BREWING ENZYMES. Summary of CBS brewing enzymes.. We invite you to read our topic: Why and when to use exogenous enzymes in the ... ENZYME TYPE. FUNCTION. Liquamyl T. Thermostable alpha-amylase. Starch liquefaction by endo-hydrolysis of alpha - 1,4 bonds at ... Debranching enzyme. Debranching alpha-1,6 bonds for high attenuation. Maxiferm. Amylases mixture and debranching. Reaching high ...
Find out which enzymes are best for fruit juice production: ... Enzymes can help improve the fruit juice extraction process ... Enzymes can play a key role in these processes, improving yield, clarity and stability of the juice. Blends of macerating ... Improve Yield, Clarity and Stability of Fruit Juice with the Use of Enzymes The juices from a wide variety of fruit & ... Some examples of enzymes used in fruit juice production:. *Pectinase 831L promotes improved juice yield, full flavour recovery ...
Regulation of p53 stability and function by the deubiquitinating enzyme USP42. Andreas K Hock, Arnaud M Vigneron, Stephanie ... Dayal S, Sparks A, Jacob J, Allende‐Vega N, Lane DP, Saville MK (2009) Suppression of the deubiquitinating enzyme USP5 causes ... Yuan J, Luo K, Zhang L, Cheville JC, Lou Z (2010) USP10 regulates p53 localization and stability by deubiquitinating p53. Cell ... Stevenson LF, Sparks A, Allende‐Vega N, Xirodimas DP, Lane DP, Saville MK (2007) The deubiquitinating enzyme USP2a regulates ...
... for bio-based chemical production is problematic due to the high processing costs of pretreatment and saccharifying enzymes ... Enzyme stability tests. To examine the stability of enzyme mixture during L. brevis cell growth, 800 FPU and 800 CBU of ... Enzyme stability during the fermentation. Enzyme stability during the fermentation plays a key role in maximizing the ... In addition, enzyme stability throughout the fermentation decreases the total amount of enzyme required during the fed-batch ...
2018 Laboratory Corporation of America® Holdings and Lexi-Comp Inc. All Rights Reserved.. CPT Statement/Profile Statement. The LOINC® codes are copyright © 1994-2018, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at Additional information regarding LOINC® codes can be found at, including the LOINC Manual, which can be downloaded at ...
... resistance than those from WLT by higher optimum temperatures and the activation energy required for inactivating the enzyme by ... enzyme activity in samples collected from two reef sites with contrasting temperature regimes: a site near a nuclear power ... Effects of temperature on enzyme kinetic parameters and stability. The enzyme reaction was determined as described in the ... The thermal stability of MDH isolated from NPP-OL and WLT coral samples were compared by incubating the diluted enzyme solution ...
By definition, this stability is zero at (equilibrium constant and ). At temperatures below , the stability increases, as ... Conformational Stability of Psychrophilic Enzymes. The numerous insights for close relationships between activity and stability ... G. Feller, "Protein stability and enzyme activity at extreme biological temperatures," Journal of Physics: Condensed Matter, ... The psychrophilic enzymes unfold according to an all-or-none process, revealing a uniformly low stability of the architecture. ...
Stability and Stabilization of Enzymes Published: 10th May 1993 Editors: W.J.J. van den Tweel A. Harder R.M. Buitelaar ...
Stability Tests and Enzyme-Linked Immunosorbant Assay (ELISA). For stability tests, 100 µl of diluted nanobodies (1:10 v:v), R- ... A) Phage enzyme-linked immunosorbant assay (ELISA) of the M13 phagemids (1010 phages/ml) from three rounds of phage display ... Stability of M13-NbGH07. Nanobody has a stable structure that is resistant to harsh conditions such as extreme pH and ... Enzyme-linked immunosorbant assay (ELISA) was performed using phage-Nbs, M13-NbGH01 and M13-NbGH07, and specific anti-GH and ...
Analytical Enzyme Chymotrypsin: Chymotrypsin is produced in the acinar cells of the pancreas as the inactive precursor, ... Solubility and Solution Stability. Chymotrypsin is typically soluble in 1 mM HCl (2 mg/ml), yielding a clear solution.. ... Desnuelle, P.: The Structure of Chymotrypsin,The Enzymes, 3rd Ed. Vol. 3, P. Boyer, H. et al., Ed., Academic Press, NY, 185-191 ... Hess, G. P., The Enzymes, 3rd ed., vol. 3, Boyer, P. D., ed., Academic Press (New York, NY: 1971), pp. 213-248. ...
What is alkene stability?. * Q: What is boron used for?. * Q: What is the basic structure of an enzyme?. ...
Thermal stability of the 10-DAXP xylosidase activity of the two purified enzymes. (b) stability of the 10 ... Stabilities of the Purified Enzymes toward 10-DAXP.(a) ... f4: Stabilities of the Purified Enzymes toward 10-DAXP.(a) ... f4: Stabilities of the Purified Enzymes toward 10-DAXP.(a) Thermal stability of the 10-DAXP xylosidase activity of the two ... Thermal stability of the 10-DAXP xylosidase activity of the two purified enzymes. (b) stability of the 10-DAXP xylosidase ...
Evaluation of Various Packaging Systems on the Activity of Antioxidant Enzyme, and Oxidation and Color Stabilities in Sliced ... Evaluation of Various Packaging Systems on the Activity of Antioxidant Enzyme, and Oxidation and Color Stabilities in Sliced ... In conclusion, we confirmed the activity of antioxidant enzyme, and lipid and protein oxidation, and color stabilities in ... This research was, therefore, conducted to estimate the activities of antioxidant enzymes, and oxidation and color stabilities ...
Chopade J, Mahadik KR, Sathiyanarayanan L, Nikam A. Effect of pH and Gastrointestinal Enzymes on Stability of Psoralen, ... Effect of pH and Gastrointestinal Enzymes on Stability of Psoralen, Bakuchicin and Bakuchiol using Simultaneous TLC ... in vitro stability studies of above markers in simulated gastric and intestinal fluids to study the effect of pH and GI enzymes ... To study the effect of pH and gastrointestinal (GI) enzymes on Psoralen, Bakuchicin and Bakuchiol from Psoralea corylifolia ...
Stability. Store at 4°C if entire vial will be used within 2-4 weeks. Store, frozen at -20°C for longer periods of time. For ... Specific activity is 5-8 units/mg, and is defined as the amount of enzyme that conjugate 1.0 u mole of 1-chloro-2,4- ... These enzymes function in the detoxification of electrophilic compounds, including carcinogens, therapeutic drugs, ...
  • Accordingly, we developed an easy and informative fluorometric method for the assessment of CYP2C19 enzyme inactivation kinetics. (
  • Enzyme kinetics. (
  • Practical Enzyme Kinetics provides a practical how-to guide for beginning students, technicians, and non-specialists for evaluating enzyme kinetics using common software packages to perform easy enzymatic analyses. (
  • a concise introduction to enzyme kinetics. (
  • a valuable companion for everyone seeking a quick overview of the theory of enzyme kinetics. (
  • Proteins: Concepts in Biochemistry teaches the biochemical concepts underlying protein structure, evolution, stability, folding, and enzyme kinetics, and explains how interactions in macromolecular structures determine protein function. (
  • Covers enzyme kinetics from its most elementary aspects to such modern subjects as steady-state, multi-reactant kinetics and isotope exchange. (
  • abstract = "It is well established that the phosphorylation of tyrosine hydroxylase (TH) at Ser40 is critical in regulating the catalytic activity of the enzyme. (
  • In this study, we demonstrated enhanced kinetic stability of Candida antarctica lipase B (CalB) by mutating the structurally flexible residues within the active site. (
  • An extracellular enzyme cocktail (a mixture of amylase, protease, lipase, and cellulose) was produced from Aspergillus niger and Phanerochaete chrysosporium through submerged fermentation. (
  • The immobilized/cross linked enzyme was more thermostable at 70 and 80ºC in comparison to aqueous and surface adsorbed lipase on silica and HP-20. (
  • Half-life of immobilized lipase was nearly 2.5 x higher than the aqueous enzyme at 70ºC. (
  • Encapsulation of enzyme in metal-organic frameworks (MOFs) via co-precipitation process was realized, and the generality of the synthesis was validated by using cytochrome c, horseradish peroxidase, and Candida antarctica lipase B as model enzymes. (
  • Here, we report a biomimetic mineralization route to synthesize enzyme-MOF composites, using cytochrome c (Cyt c), horseradish peroxidase (HRP), and Candida antarctica lipase B (CALB) as model enzymes. (
  • The optimal protocol (GA at 0.5% and pH 6, lipase solution pH 6) gave an enzyme load of 46.6mgg dry cloth with expressed activity of 178.3U, 46.8% immobilization yield and 30.2% retained activity. (
  • The immobilized lipase also had a good stability and 81% of its original activity was maintained after 10 runs in tributyrin emulsion hydrolysis. (
  • This protocol provides a significant improvement in terms of retained activity and lipase stability compared to previous immobilizations on wool and opens up the possibility of using wool as a cheap and effective lipase support material for continuous lipase reactions/reactors and possibly enzyme enhanced woolen fabrics. (
  • Novozymes Lipozyme® CALB and the other enzymes in our lipase portfolio are in liquid formulation. (
  • The jars were opened on days 3, 7 and 15 to determine pH, while those of day 25 were sampled to determine nutrient composition, fermentation characteristics and aerobic stability. (
  • By comparison to a sequential hydrolysis and fermentation process, SSMSF reduced operation time and the amount of cellulase enzyme necessary to produce the same amount of lactic acid. (
  • 2002 ). Ideally, the saccharification of lignocellulosic materials and fermentation of mixed sugars could be integrated into a single processing step in order to increase the productivity and to reduce the requirement of enzymes for hydrolysis. (
  • Several other lectures will be presented by experts in specific topics of enzyme and fermentation technology. (
  • In the first year of the project, initial screening of 3 promising soil enzyme assays as indicators will be done. (
  • Using a two-dimensional proteomics approach, we recovered 11 protein bands, isolated using activity assays targeting cellulose-, pectin- and xylan-degrading enzymes. (
  • However, under strong directional selection, mutations that confer novel phenotypes but compromise structural stability of proteins may be permissible. (
  • During the evolution of antibiotic resistance, mutations that confer drug resistance often have pleiotropic effects on the structure and function of antibiotic-target proteins, usually essential metabolic enzymes. (
  • Protein ubiquitination is a reversible process and several families of enzymes have been described which possess deubiquitinating activity, including the ubiquitin‐specific proteases (USPs), ubiquitin C‐terminal hydrolases (UCHs), ovarian tumour proteases (OTU), Machado‐Joseph disease proteins (MJD) and the Jab1/MPN/Mov34 metalloenzymes (JAMM) ( Nijman et al , 2005 ). (
  • 10. The process as claimed in claim 8 wherein the enzyme is concentrated with ammonium sulphate and then separated from other proteins. (
  • Use of Enzyme Kinetic Data in the Study of Structure-Function Relationships of Proteins (Takuji Tanaka and Rickey Y. Yada). (
  • When 110 AAs or 218 AAs were deleted from the N-terminal or when the unique portions of KGA and GAC that are beyond the 550 AA were deleted from the C-terminal, KGA and GAC retained enzyme activity comparable to the full length proteins. (
  • Modulation of messenger RNA stability is usually mediated by stabilizing or destabilizing RNA-binding proteins (RNA-BP) that bind to the 3′-untranslated region regulatory motifs, such as AU-rich elements (AREs). (
  • In the adrenal cortex, the expression and activity of mRNA stability regulatory proteins are still understudied. (
  • Another less characterized level of regulation through which ACTH exerts its actions is the control of mRNA stability through the activity of specific proteins that bind the 3′-untranslated region (3′-UTR) of target mRNAs. (
  • Enzymes are naturally occurring biological macromolecules that are made up of proteins. (
  • Wax or calcium-alginate immobilized catalysts (live catalysts) showed higher enzyme activity than the GA-PEI catalyst. (
  • Although enzymes are remarkably specific catalysts, they can often perform side reactions in addition to their main, native catalytic activity. (
  • In biocatalysis, natural catalysts like enzymes replace chemical catalysts in synthetic processes. (
  • In order to take full advantage of the use of nonaqueous solvents in enzyme catalysis, it is essential to elucidate the molecular basis of enzyme stability in these media. (
  • Thus, it is thought that the tetrameric structure functions to restrict these motions and optimise enzyme dynamics for catalysis. (
  • The fusion strategy presented here reveals a surprising means for the stabilization of enzymes and stresses the importance for improving stability of enzymes used in industrial applications. (
  • Most psychrophilic enzymes optimize a high activity at low temperature at the expense of substrate affinity, therefore reducing the free energy barrier of the transition state. (
  • Although their stability effects are not as dramatic as in key catalytic residues, mutations that modify the substrate binding pockets, and thus mediate new enzymatic specificities, place a larger stability burden than surface mutations that underline neutral, non-adaptive evolutionary changes. (
  • Enzymes are evolved to catalyse a particular reaction on a particular substrate with a high catalytic efficiency ( k cat /K M , cf . (
  • We conclude that for isoamylase to promote amylopectin synthesis it needs to act on a specific precursor (pre-amylopectin) generated by the combined actions of plant starch synthase and branching enzyme isoforms and when presented with an unsuitable substrate (i.e. (
  • These enzymes prefer hydrophobic L-amino acids, because of substrate specificity related to side-chain binding sites [ 27 ]. (
  • Enzymes only react with their specific substrate, which makes them excellent candidates for quantifying specific molecules in a sample, even in complex mixtures. (
  • This gives a total of four FAD molecules and four acyl-CoA substrate binding sites per enzyme. (
  • The acyl-CoA substrate is bound completely within each monomer of the enzyme. (
  • Inhibition of P450 enzymes is a common mechanism that can lead to drug interactions. (
  • Reversible Enzyme Inhibition. (
  • It is well established that the phosphorylation of tyrosine hydroxylase (TH) at Ser 40 is critical in regulating the catalytic activity of the enzyme. (
  • section describes the catalytic activity of an enzyme, i.e. a chemical reaction that the enzyme catalyzes. (
  • Phosphorylation and proteasomal digestion of the enzyme. (
  • However, the influence of the phosphorylation of Ser 40 on the stability of TH protein has not been investigated. (
  • Collectively, these results indicate the fact that the phosphorylation of Ser 40 does not affect the stability of TH protein in PC12 cells. (
  • The increased stability of S8E, S19E, and S31E tyrosine hydroxylases may be one of the physiological effects of phosphorylation. (
  • Characterization of Enzyme Activity. (
  • This research is pioneering in its isolation, characterization and enzyme stability evaluation of an LAAO from CdtV, denominated bordonein-L. These results are important because they increase the knowledge about stabilization of LAAOs, aiming to increase their shelf life. (
  • Membrane-bound hydrogenase from Alcaligenes eutrophus: biochemical and immunological characterization of the solubilized and purified enzyme. (
  • The aim of this paper is to describe the behavior of immobilized enzyme systems described by nonlinear partial differential equations. (
  • Lefever R. "Dissipative Structure in Reaction-Diffusion Systems" pp.17-39 in "Analysis and Control of Immobilized Enzyme Systems" Ed. D. Thomas and J.P. Kernevez, North Holland, (1976). (
  • Glutaminase is a crucial initial enzyme in the glutaminolysis pathway, providing an energy source for proliferating cells and nitrogen substrates for lipid and protein synthesis. (
  • said composition being sufficiently stabilized to maintain at least 80% of its initial enzyme activity over a period of at least two months. (
  • These results indicate that cryopreserved human hepatocytes can be stored stably for more than a decade with little or no change in viability, activity of drug metabolizing enzymes, or CYP3A4/5 induction, and can be widely applicable to qualitative research in drug metabolism. (
  • The human cytochrome P450 (P450) enzymes play an important role in the metabolism of drugs and numerous other xenobiotics. (
  • This has been seen for other metabolic enzymes as well, suggesting that acidification is a signal to reprogram the metabolism of a cell. (
  • We sought to understand the factors that control switch stability and to determine the functional relationship between stability and the number of molecules involved. (
  • In the absence of the C30-C58 disulfide bridge, pseudolysin undergoes larger conformational changes, becoming more open and more permeable to ethanol molecules which accumulate in its interior and form hydrophobic interactions with the enzyme, destroying its structure. (
  • Previous attempts in the preparation of enzyme-MOF composites have been majorly focused on the strategy of adsorbing protein molecules into pre-synthesized MOFs which have pore sizes similar to the dimensions of enzyme molecules (Feng et al. (
  • Covalently linking enzyme molecules on the surface of MOF particles (Shi et al. (
  • Enzymes convert substrates, which are molecules that the enzyme reacts with into different molecules, known as products. (
  • Co-expression of both ISA1 and ISA2 Escherichia coli allowed the formation of the active recombinant enzyme and we show using site-directed mutagenesis that ISA1 is the catalytic subunit. (
  • Recombinant protein technology allows for modification of native DNA for optimized properties and the ability to produce the enzyme outside of its native source. (
  • Intracellular stability of tyrosine hydroxylase. (
  • Tyrosine hydroxylase (TH), the rate-limiting enzyme in the biosynthesis of catecholamines, is a key protein involved in the pathogenesis of neurodegenerative diseases such as Parkinson's disease. (
  • フィンガープリント Intracellular stability of tyrosine hydroxylase. (
  • The S8E, S19E, and S31E tyrosine hydroxylase variants have similar steady-state kinetic parameters and similar binding affinity for catecholamines to wild-type enzyme. (
  • Royo, M, Fitzpatrick, PF & Daubner, SC 2005, ' Mutation of regulatory serines of rat tyrosine hydroxylase to glutamate: Effects on enzyme stability and activity ', Archives of Biochemistry and Biophysics , vol. 434, no. 2, pp. 266-274. (
  • In these naturally evolved enzymes, the optimization to low temperature activity is reached via destabilization of the structures bearing the active site or by destabilization of the whole molecule. (
  • Isolation and identification of Bacillus producing thermophilic alpha amylase: production optimization and investigation of the activity and stability of enzyme. (
  • Afrisham S, Badoei-delfard A, Namaki Shoushtari A, Karami Z, Malek-abadi S. Isolation and identification of Bacillus producing thermophilic alpha amylase: production optimization and investigation of the activity and stability of enzyme. (
  • The results obtained from the optimization of the enzyme production medium showed that among the carbon, nitrogen and ion sources investigated, starch (1 gr/l), gelatin (2 g/l) and magnesium sulfate (1 g/l) had the most increasing effect on the production of AT59 alpha-amylase. (
  • Also, if we look at dishwashers liquid, all enzymes are kept at room temperature and stay active! (
  • Taq and many other enzymes do degrade quite quickly at room temperature, a few minutes are probably OK, but certainly hours are not. (
  • After screening 2200 colonies, we obtained the D223G/L278M mutant, which exhibited a 13-fold increase in half-life at 48 °C and a 12 °C higher T 50 15 , the temperature at which enzyme activity is reduced to 50% after a 15-min heat treatment. (
  • Here we show acclimatization and/or adaptation potential of menthol-bleached aposymbiotic coral Platygyra verweyi in terms of respiration breakdown temperature (RBT) and malate dehydrogenase (MDH) enzyme activity in samples collected from two reef sites with contrasting temperature regimes: a site near a nuclear power plant outlet (NPP-OL, with long-term temperature perturbation) and Wanlitong (WLT) in southern Taiwan. (
  • An investigation to examine the effects of temperature on membrane stability in beetroot, by assessing the degree of pigment leakage. (
  • Aim: - to discover how temperature affects the stability of the cell membrane in beetroot. (
  • 1. An enzyme extracted and isolated from the microorganism Streptomyces megasporus SD5 or mutant thereof which is isolated by a process which comprises the steps of: a) cultivating the microorganism Streptomyces megasporus SD5 or mutant thereof under aerobic conditions at a temperature in the range of 45° C. to 65° C. in an alkaline aqueous nutrient medium and b) recovering the enzyme. (
  • The optimum pH (pH 8.5) was nearly same for aqueous and immobilized enzyme while optimum temperature was nearly 5ºC higher in case of immobilized enzyme. (
  • 2012 ). One of the important aims of enzyme immobilization is to achieve high enzyme stability at harsh conditions such as high temperature and organic solvents which often existe in industrial biocatalytic processes. (
  • The enzyme-MOF composites have showed the great potential of increasing enzyme stability at high temperature (Liang et al. (
  • SPLA2 stability in the presence of organic solvents, as well as in acidic and alkaline pH and at high temperature makes it a good candidate for its application in food industry. (
  • However, VACP beef was found to have the most positive effects on the antioxidant activity, oxidation and red color stabilities among the various packaged beef. (
  • The endogenous antioxidant enzymes in the meat are affected by various factors, such as feed, pre-slaughter stress, packaging and processing, etc. (
  • Combined osmodehydration and high pressure processing on the enzyme stability and antioxidant capacity of a grapefruit jam. (
  • Enzyme activity of liquid proteolytic enzyme-containing detergent compositions is stabilized by adding an antioxidant and a hydrophilic polyol and, when necessary, stabilizing the pH of the composition. (
  • How protein stability and new functions trade off. (
  • Here we show that rice ( Oryza sativa L.) soil-surface rooting 1 (SOR1), which is a RING finger E3 ubiquitin ligase identified from analysis of a rice ethylene-insensitive mutant mhz2/sor1-2 , controls root-specific ethylene responses by modulating Aux/IAA protein stability. (
  • Whereas the fusion construct retained enzymatic activity, significant differences in thermostability and pH stability were observed. (
  • Therefore, the most common strategy to improve enzymatic stability is to introduce new interactions that raise the transition state energy barrier for denaturation. (
  • The proposed high pressure preservation processing was able to improve the enzymatic stability of jam obtained by osmotic dehydration without affecting the bioactive content. (
  • Numerous studies have noted that the evolution of new enzymatic specificities is accompanied by loss of the protein's thermodynamic stability (DeltaDeltaG), thus suggesting a tradeoff between the acquisition of new enzymatic functions and stability. (
  • We found that mutations that modulate enzymatic functions are mostly destabilizing (average DeltaDeltaG = +0.9 kcal/mol), and are almost as destabilizing as the "average" mutation in these enzymes (+1.3 kcal/mol). (
  • Here, we show that the enzyme glutamine synthetase (Gln1) forms filaments at low pH and that filament formation leads to enzymatic inactivation. (
  • The enzyme is a cellulase compound which breaks down cellulose fibrils to promote better gluten development and proofing stability which, in turn, results in a better end product. (
  • Cellulase 13L/MDP is an enzyme preparation for the degradation of cellulose and other viscosity forming polysaccharides. (
  • Overall, the results of this research reveal the enhancement in the activity of fungal extracellular enzyme cocktail through nanoencapsulation. (
  • Furthermore, expression of the core 219 AA - 550 AA coding sequence in cells increased extracellular glutamate concentrations to levels comparable to those of full-length KGA and GAC expressions, suggesting that the core enzyme activity of the protein lies within the central 219 AA - 550 AA. (
  • ACTH also strongly regulates the transcription of a number of genes involved in the steroidogenic response including those encoding several steroidogenic enzymes ( 3 ), components of the extracellular matrix ( 4 ) and many others. (
  • pH Dependence of Enzyme-Catalyzed Reactions. (
  • Various metabolic enzymes allow cells to control the rate at which these reactions occur. (
  • Facilitating reactions with enzymes can improve your sustainability profile and cut your costs, while enzymes for cell culture eliminate the risk of viral and animal‐related contaminants in the final product. (
  • This multienzyme complex, with excellent catalytic efficiency of kcat 13.2 s(-1) to remove the C-7 xylosyl group from 7-xylosyl-10-deacetylpaclitaxel (10-DAXP), has an outstanding tolerance against organic solvents and an excellent general stability, with the long half-life of 214 hours. (
  • One of the drawbacks of nonaqueous enzymology is the fact that enzymes tend to be less stable in organic solvents than in water. (
  • The enzyme immobilized in MOF exhibited enhanced thermal stability and high tolerance towards protein denaturing organic solvents. (
  • However, the stability of enzyme-MOF composites in organic solvents, especially in highly polar organic solvents such as dimethyl sulfoxide (DMSO), dimethyl formamide (DMF), methanol, and ethanol has not been well investigated. (
  • Stability of SPLA2 in the presence of organic solvents, and its tolerance to high temperatures, basic and acidic pH, makes it a good candidate for application in food industry to treat phospholipid-rich industrial effluents, or to synthesize useful chemical compounds. (
  • The enzyme activity and stability were evaluated by a microplate colorimetric assay and the molecular mass was estimated by SDS-PAGE using periodic acid-Schiff staining and determined by mass spectrometry. (
  • 11. The process as claimed in claim 10 wherein the concentrated enzyme is separated by gel filtration, ion exchange chromatography and isoelectric focusing in the presence of a buffer having a pH in the range of 3-10. (
  • The enzyme was isolated through cation exchange, gel filtration and affinity chromatography, followed by a reversed-phase fast protein liquid chromatography to confirm its purity. (
  • We demonstrated the nano-immobilization of fungal enzymes through their encapsulation in cellulose nanoparticles (CNPs). (
  • Fourier transform infrared spectroscopy (FTIR) and energy dispersive spectroscopy demonstrated the successful encapsulation of the fungal enzyme cocktail and revealed C and O as its major components. (
  • Thermogravimetric analysis proved that the CNP-encapsulated enzymes had an initial weight loss at 250°C. The encapsulated fungal enzyme cocktail exhibited higher catalytic performance and stability than the free enzymes. (
  • The encapsulated fungal enzyme cocktail derived from A. niger at the concentration of 100 µg/mL, showed the highest amylase activity with a clear zone of 2.5 cm. (
  • These similar characteristics among these fungal crude enzymes suggest that they can be used synergistically in cocktails in future studies of biomass conversion with potential application in several biotechnological sectors. (
  • In Illinois, Royal DSM is expanding its product offering of low glycerol yeast technology for the biofuels industry with the introduction of eBOOST™ GT and a new enzyme for fiber conversion, eBREAK™ 1000F. (
  • now reveal more about how and why an enzyme called glutamine synthetase (Gln1) forms filaments in yeast cells. (
  • The latter property raises the possibility of using standard hydrogenases that are not O 2 -tolerant: however, experiments with such an enzyme reveal good short-term performance due to restricted O 2 access, but low long-term stability because the root cause of O 2 sensitivity has not been addressed. (
  • We evaluated the long term stability of hepatocytes stored in vapor phase of liquid nitrogen for their viability, cytochrome P450 (CYP) 1A2 activity, CYP3A4/5 activity, uridine diphosphate-glucuronosyl transferase (UGT) activity, sulfotransferase (SULT) activity, and CYP3A4/5 induction during 14 years of preservation. (
  • Determine the long term stability and implications of previously identified clinical and molecular asthma phenotypes, specifically the mast cell signature, and identify potential systemic biomarkers for these phenotypes. (
  • Thermostability and osmostability of the five enzymes in whole cells (plate grown and fermented) were evaluated in this study, i.e. βCAS-like was more stable than the other four enzymes in storage conditions. (
  • The enzyme was adsorbed on silica and HP-20 beads followed by cross-linking with gluteraldehyde on HP-20, which improved the thermostability of enzyme. (
  • Provided herein are methods, compositions and kits for use in the site-specific labeling of glycoproteins comprising a combination of enzyme-mediated incorporation of modified sugars comprising a chemical handle and cycloaddition chemistry with a labeling molecule comprising a reactive group, a metal ion chelator, and/or a fluorophore. (
  • How are enzymes used for analytical chemistry? (
  • In contrast, free enzymes retained no more than 20% of their original activities at the same condition. (
  • In contrast, free enzymes lost almost all their activities at the same condition. (
  • Protease enzymes catalyze the reaction of hydrolysis of various bonds with the participation of a water molecule. (
  • Regulation of p53 stability occurs predominantly through polyubiquitination and degradation by the 26S proteasome and many E3 ubiquitin ligases have now been described for p53 ( Horn and Vousden, 2007 ). (
  • The regulation of mRNA stability has emerged as a critical control step in dynamic gene expression. (
  • Is the Subject Area "Enzyme regulation" applicable to this article? (
  • Here, we present the enhanced enzyme stability by fusing the enzyme to a nano-particle-like cellulose binding domain (CBD) expressed in engineered Escherichia coli . (
  • Glutaminase 1 is a phosphate-activated metabolic enzyme that catalyzes the first step of glutaminolysis, which converts glutamine into glutamate. (
  • Prokaryotic expressions of the mutant glutaminase 1 protein and a glutaminase enzyme activity assay were used to determine if KGA and GAC have similar efficiency and efficacy to convert glutamine into glutamate. (
  • Glutaminase is an important metabolic enzyme that catalyzes the deamidation of glutamine to glutamate. (
  • Flavin adenine dinucleotide (FAD) is a required co-factor in addition to the presence of an active site glutamate in order for the enzyme to function. (
  • The stability of p53 is tightly regulated by ubiquitin‐dependent degradation, driven mainly by the ubiquitin ligase MDM2. (
  • Distinct requirements for charging of the ubiquitin conjugating enzymes Use1 and Cdc34 in vivo . (
  • Finley, D., Ciechanover, A. & Varshavsky, A. Thermolability of ubiquitin-activating enzyme from the mammalian cell cycle mutant ts85. (
  • Ubiquitin-conjugating enzyme UBE2D3 is an important member of the ubiquitin-proteasome pathways. (
  • Our previous study showed that the ubiquitin conjugating enzyme UBE2D3 was negatively related to radioresistance in breast cancer cells [ 8 ]. (
  • The Steroidogenic Enzyme AKR1C3 Regulates Stability of the Ubiquitin Ligase Siah2 in Prostate Cancer Cells. (
  • Esterification of methanol and oleic acid to methyl oleate by immobilized enzyme was studied in detail. (
  • Remarkably, when exposed to protein denaturing solvents including dimethyl sulfoxide, dimethyl formamide, methanol, and ethanol, the enzyme/MOF composites still preserved almost 100% of activity. (
  • After being encapsulated in MOFs, enzymes can retain almost all their activities even incubated in protein denaturing solvents including DMSO, DMF, methanol, and ethanol. (
  • In addition, MDH activity in P. verweyi from NPP-OL showed higher thermal resistance than those from WLT by higher optimum temperatures and the activation energy required for inactivating the enzyme by heat. (
  • Psychrophiles thriving permanently at near-zero temperatures synthesize cold-active enzymes to sustain their cell cycle. (
  • These enzymes are already used in many biotechnological applications requiring high activity at mild temperatures or fast heat-inactivation rate. (
  • Among them, thermophilic alpha-amylases are of particular importance, which is due to their activity and stability in high temperatures. (
  • All these crude enzymes presented stability around pH 3.0-8.0 and up to 60 °C, which can be very useful in industrial processes that work at high temperatures and low pHs. (
  • We observed that bromelain was able to maintain its stability at pH 5.0 for the temperatures studied. (
  • 8. An enzyme feed additive according to claim 1, wherein the xylanase is a mutant xylanase having an amino acid sequence not found in nature, such a sequence corresponding to that of a naturally occurring xylanase modified by inserting, deleting or replacing one or more amino acid residues in the naturally occurring xylanase. (
  • Differences in the enzyme occur based on the location of the active site along the amino acid sequence. (
  • The enzymes in dishwashers etc are all stabilised or are forms that are resistant to degradation. (
  • Bye -20 degrees you avoid a slow, gradually degradation, but keep a more or less constant concentration of active enzyme. (
  • Elucidation of the mechanisms regulating the synthesis, degradation, and activity of TH should be a first target in order to understand the role of this enzyme in pathogenesis. (
  • In this report, we propose the mechanism by which the N-terminal part of TH regulates the degradation of this enzyme. (
  • FAD binding contributes significantly to overall enzyme stability. (
  • Numerous studies have revealed that enzymes maintain their structural stability through various kinds of non-covalent interactions, including hydrogen bonds, salt bridges, hydrophobic interactions, and van der Waals forces. (
  • Using structure-based mutational analysis, we show that perturbation of critical stabilizing hydrophobic interactions in wild-type EcDHFR enzyme explains the phenotypes of Trp30 mutants. (
  • Mutational and computational analyses in EcDHFR and in DHFR enzymes from Staphylococcus aureus and Mycobacterium tuberculosis demonstrate that natural variation at this site and its interacting hydrophobic residues modulates TMP resistance in other bacterial DHFRs as well, and may explain the different susceptibilities of bacterial pathogens to TMP. (
  • The performance characteristics of simple enzyme-based membrane-less hydrogen fuel cells running on non-explosive H 2 -rich air mixtures have been established using an adjustable test bed that allows multiple unit cells to operate in series or parallel. (
  • Hydrogenases that are truly O 2 tolerant must therefore remain the major focus of any future enzyme-based hydrogen fuel cell technology. (
  • Hydrogenase: its role as electron generating enzyme in the nitrogen fixing hydrogen bacterium Xanthobacter autotrophicus. (
  • For good aqueous dispersity, low price and other unique properties, citric acid-modified magnetic iron oxide nanoparticles (CA-Fe 3 O 4 NPs) have been widely used for immobilizing enzymes. (
  • 13. An enzyme extracted and isolated from the microorganism Streptomyces megasporous SD5 which is a serine protease of 264 amino acids and has a molecular weight of about 35 kDa as determined by SDS-PAGE. (
  • 14. The enzyme according to claim 1 which is a serine protease of 264 amino acids and has a molecular weight of about 35 kDa as determined by SDS-PAGE. (
  • An enzyme feed additive is provided comprising a xylanase, a protease, and optionally a β-glucanase. (
  • If you want to look into stable enzymes - RNase is a good place to start. (
  • In California, a new study led by researchers at the Department of Energy's Joint BioEnergy Institute (JBEI), based at Lawrence Berkeley National Laboratory (Berkeley Lab), demonstrates the importance of microbial communities as a source of stable enzymes that could be used to convert plants to biofuels. (
  • Other metabolic enzymes also assemble into filaments at low pH. (
  • Hence, we propose that filament formation is a general mechanism to inactivate and store key metabolic enzymes during a state of advanced cellular starvation. (
  • Recently, researchers have noticed that metabolic enzymes can form filaments in cells, usually when the cells are deprived of energy or nutrients. (
  • In this paper we report a facile method for preparing co-immobilized enzyme and magnetic nanoparticles (MNPs) using metal coordinated hydrogel nanofibers. (
  • Liang, H. Co-Immobilization of Enzymes and Magnetic Nanoparticles by Metal-Nucleotide Hydrogelnanofibers for Improving Stability and Recycling. (
  • Li C, Jiang S, Zhao X, Liang H. Co-Immobilization of Enzymes and Magnetic Nanoparticles by Metal-Nucleotide Hydrogelnanofibers for Improving Stability and Recycling. (
  • The activity (assayed by determining the release of pNP from pNP laurate) was stimulated up to 60% of these solvents in enzyme reaction mixture. (
  • Enzyme/metal-organic framework composites with high stability in protein denaturing solvents were reported in this study. (
  • Two PME fractions with different pressure stabilities were observed and kinetic models successfully explained that behavior. (
  • Offers an understanding of the behavior of enzyme systems and the diagnostic tools used to characterize them and determine kinetic mechanisms. (
  • The catalytic properties of this thermostable enzyme can be further improved via the use of different immobilization techniques and reaction conditions. (
  • The stability of encapsulated enzyme was greatly increased after immobilization on MOFs. (
  • Although immobilization may compromise the activity of enzyme, the greatly enhanced stability would enable the long-term and repeated use of enzyme and therefore a significantly reduced cost of enzyme (Liu et al. (
  • 2015 ). Metal-organic frameworks (MOFs) have emerged as a new type of nanomaterials suitable for immobilization of enzyme (Feng et al. (
  • The success of immobilization was confirmed by FTIR and confocal laser scanning microscope (CLSM), the latter proving that enzyme is well distributed across the wool fiber surfaces throughout the cloth. (
  • In particular, the CBD-GusA variant showed almost 2-fold increased half-lives compared to findings for the free GusA enzyme. (
  • These findings suggested that VSP-MOMAP was second to VACP in improving oxidation and color stabilities in sliced beef loin during chill storage. (
  • Our observations are not only in good agreement with several previous experimental findings on the stability of the enzymes studied in ethanol/water mixtures but also give an insight on the molecular determinants of this stability. (
  • Our findings may, therefore, be useful in the rational development of enzymes with increased stability in these media. (
  • These findings suggested that this enzyme has a considerable potential for use in starch industry. (
  • Toward this end, we performed mu s-long molecular dynamics simulations using two homologous proteases, pseudolysin, and thermolysin, which are known to have considerably different stabilities in Solutions containing ethanol. (
  • The analysis of the simulations indicates that pseudolysin is more stable than thermolysin in ethanol/water mixtures and that the disulfide bridge between C30 and C58 is important for the stability of the former enzyme, which is consistent with previous experimental observations. (
  • These enzymes also exhibited moderate tolerance to ethanol and the sugars glucose and xylose. (
  • Isoamylase-type debranching enzymes (ISAs) play an important role in determining starch structure. (
  • No evidence for interaction with other starch biosynthetic enzymes was found. (
  • This work indicated that metal-nucleotide nanofibers could efficiently co-immobilize enzymes and MNPs simultaneously, and improve the stability of biocatalysts. (
  • Biocatalysts provide a comprehensive range of enzymes to aid the production of fruit juice and cider. (
  • Coordination of expression of Zymomonas mobilis glycolytic and fermentative enzymes: a simple hypothesis based on mRNA stability. (
  • and the second is a promising indicator, developed at Oregon State University called a thermal enzyme stress index. (
  • a) Thermal stability of the 10-DAXP xylosidase activity of the two purified enzymes. (
  • The thermal stability (T(m)) of the FAAH/inhibitor complex varied significantly depending on the chemical characteristics of the inhibitors, notably variations in the head group. (
  • Our computational results show that, depending on the timescale of fluctuations in enzyme numbers, for a switch composed of about 15 CaMKII holoenzymes, the stable persistent activation can span from a few years to a human lifetime. (
  • The invention also provides a biosensor ( 20 ) which includes an enzyme electrode, and methods of manufacturing the enzyme electrode and biosensor. (
  • ACADs are an important class of enzymes in mammalian cells because of their role in metabolizing fatty acids present in ingested food materials. (