Ornithine. Medical search

An amino acid produced in the urea cycle by the splitting off of urea from arginine.

A pyridoxal-phosphate protein, believed to be the rate-limiting compound in the biosynthesis of polyamines. It catalyzes the decarboxylation of ornithine to form putrescine, which is then linked to a propylamine moiety of decarboxylated S-adenosylmethionine to form spermidine.

A urea cycle enzyme that catalyzes the formation of orthophosphate and L-citrulline (CITRULLINE) from CARBAMOYL PHOSPHATE and L-ornithine (ORNITHINE). Deficiency of this enzyme may be transmitted as an X-linked trait. EC 2.1.3.3.

A pyridoxal phosphate enzyme that catalyzes the formation of glutamate gamma-semialdehyde and an L-amino acid from L-ornithine and a 2-keto-acid. EC 2.6.1.13.

An inherited urea cycle disorder associated with deficiency of the enzyme ORNITHINE CARBAMOYLTRANSFERASE, transmitted as an X-linked trait and featuring elevations of amino acids and ammonia in the serum. Clinical features, which are more prominent in males, include seizures, behavioral alterations, episodic vomiting, lethargy, and coma. (Menkes, Textbook of Child Neurology, 5th ed, pp49-50)

An inhibitor of ORNITHINE DECARBOXYLASE, the rate limiting enzyme of the polyamine biosynthetic pathway.

A toxic diamine formed by putrefaction from the decarboxylation of arginine and ornithine.

Enzymes that catalyze the addition of a carboxyl group to a compound (carboxylases) or the removal of a carboxyl group from a compound (decarboxylases). EC 4.1.1.

A polyamine formed from putrescine. It is found in almost all tissues in association with nucleic acids. It is found as a cation at all pH values, and is thought to help stabilize some membranes and nucleic acid structures. It is a precursor of spermine.

An essential amino acid that is physiologically active in the L-form.

An enzyme that catalyzes the decarboxylation of S-adenosyl-L-methionine to yield 5'-deoxy-(5'-),3-aminopropyl-(1), methylsulfonium salt. It is one of the enzymes responsible for the synthesis of spermidine from putrescine. EC 4.1.1.50.

Biogenic amines having more than one amine group. These are long-chain aliphatic compounds that contain multiple amino and/or imino groups. Because of the linear arrangement of positive charge on these molecules, polyamines bind electrostatically to ribosomes, DNA, and RNA.

A biogenic polyamine formed from spermidine. It is found in a wide variety of organisms and tissues and is an essential growth factor in some bacteria. It is found as a polycation at all pH values. Spermine is associated with nucleic acids, particularly in viruses, and is thought to stabilize the helical structure.

Progressive, autosomal recessive, diffuse atrophy of the choroid, pigment epithelium, and sensory retina that begins in childhood.

A ureahydrolase that catalyzes the hydrolysis of arginine or canavanine to yield L-ornithine (ORNITHINE) and urea. Deficiency of this enzyme causes HYPERARGININEMIA. EC 3.5.3.1.

Organic chemicals which have two amino groups in an aliphatic chain.

The monoanhydride of carbamic acid with PHOSPHORIC ACID. It is an important intermediate metabolite and is synthesized enzymatically by CARBAMYL-PHOSPHATE SYNTHASE (AMMONIA) and CARBAMOYL-PHOSPHATE SYNTHASE (GLUTAMINE-HYDROLYZING).

A subclass of enzymes of the transferase class that catalyze the transfer of an amino group from a donor (generally an amino acid) to an acceptor (generally a 2-keto acid). Most of these enzymes are pyridoxyl phosphate proteins. (Dorland, 28th ed) EC 2.6.1.

An increase in the rate of synthesis of an enzyme due to the presence of an inducer which acts to derepress the gene responsible for enzyme synthesis.

An enzyme that catalyzes the formation of carbamoyl phosphate from ATP, carbon dioxide, and ammonia. This enzyme is specific for arginine biosynthesis or the urea cycle. Absence or lack of this enzyme may cause CARBAMOYL-PHOSPHATE SYNTHASE I DEFICIENCY DISEASE. EC 6.3.4.16.

Elevated level of AMMONIA in the blood. It is a sign of defective CATABOLISM of AMINO ACIDS or ammonia to UREA.

Diseases of the uvea.

A compound formed in the liver from ammonia produced by the deamination of amino acids. It is the principal end product of protein catabolism and constitutes about one half of the total urinary solids.

A non-essential amino acid that is synthesized from GLUTAMIC ACID. It is an essential component of COLLAGEN and is important for proper functioning of joints and tendons.

The removal of a carboxyl group, usually in the form of carbon dioxide, from a chemical compound.

The rate dynamics in chemical or physical systems.

Enzymes that catalyze the formation of a carbon-carbon double bond by the elimination of AMMONIA. EC 4.3.1.

A colorless alkaline gas. It is formed in the body during decomposition of organic materials during a large number of metabolically important reactions. Note that the aqueous form of ammonia is referred to as AMMONIUM HYDROXIDE.

Organic compounds that generally contain an amino (-NH2) and a carboxyl (-COOH) group. Twenty alpha-amino acids are the subunits which are polymerized to form proteins.

Antineoplastic agent effective against myelogenous leukemia in experimental animals. Also acts as an inhibitor of animal S-adenosylmethionine decarboxylase.

A foul-smelling diamine formed by bacterial decarboxylation of lysine.

A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances.

Disorders affecting amino acid metabolism. The majority of these disorders are inherited and present in the neonatal period with metabolic disturbances (e.g., ACIDOSIS) and neurologic manifestations. They are present at birth, although they may not become symptomatic until later in life.

Amino acid transporter systems capable of transporting basic amino acids (AMINO ACIDS, BASIC).

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.

Decarboxylated arginine, isolated from several plant and animal sources, e.g., pollen, ergot, herring sperm, octopus muscle.

Rare congenital metabolism disorders of the urea cycle. The disorders are due to mutations that result in complete (neonatal onset) or partial (childhood or adult onset) inactivity of an enzyme, involved in the urea cycle. Neonatal onset results in clinical features that include irritability, vomiting, lethargy, seizures, NEONATAL HYPOTONIA; RESPIRATORY ALKALOSIS; HYPERAMMONEMIA; coma, and death. Survivors of the neonatal onset and childhood/adult onset disorders share common risks for ENCEPHALOPATHIES, METABOLIC, INBORN; and RESPIRATORY ALKALOSIS due to HYPERAMMONEMIA.

A mitochondrial matrix enzyme that catalyzes the synthesis of L-GLUTAMATE to N-acetyl-L-glutamate in the presence of ACETYL-COA.

A non-essential amino acid present abundantly throughout the body and is involved in many metabolic processes. It is synthesized from GLUTAMIC ACID and AMMONIA. It is the principal carrier of NITROGEN in the body and is an important energy source for many cells.

A family of alicyclic hydrocarbons containing an amine group with the general formula R-C6H10NH2.

RNA sequences that serve as templates for protein synthesis. Bacterial mRNAs are generally primary transcripts in that they do not require post-transcriptional processing. Eukaryotic mRNA is synthesized in the nucleus and must be exported to the cytoplasm for translation. Most eukaryotic mRNAs have a sequence of polyadenylic acid at the 3' end, referred to as the poly(A) tail. The function of this tail is not known for certain, but it may play a role in the export of mature mRNA from the nucleus as well as in helping stabilize some mRNA molecules by retarding their degradation in the cytoplasm.

An enzyme of the urea cycle that catalyzes the formation of argininosuccinic acid from citrulline and aspartic acid in the presence of ATP. Absence or deficiency of this enzyme causes the metabolic disease CITRULLINEMIA in humans. EC 6.3.4.5.

An enzyme that catalyzes the transfer of the propylamine moiety from 5'-deoxy-5'-S-(3-methylthiopropylamine)sulfonium adenosine to putrescine in the biosynthesis of spermidine. The enzyme has a molecular weight of approximately 73,000 kDa and is composed of two subunits of equal size.

An essential amino acid. It is often added to animal feed.

Antibiotic substance isolated from streptomycin-producing strains of Streptomyces griseus. It acts by inhibiting elongation during protein synthesis.

A genus of ascomycetous fungi, family Sordariaceae, order SORDARIALES, comprising bread molds. They are capable of converting tryptophan to nicotinic acid and are used extensively in genetic and enzyme research. (Dorland, 27th ed)

An enzyme of the urea cycle which splits argininosuccinate to fumarate plus arginine. Its absence leads to the metabolic disease ARGININOSUCCINIC ACIDURIA in man. EC 4.3.2.1.

Mitochondria in hepatocytes. As in all mitochondria, there are an outer membrane and an inner membrane, together creating two separate mitochondrial compartments: the internal matrix space and a much narrower intermembrane space. In the liver mitochondrion, an estimated 67% of the total mitochondrial proteins is located in the matrix. (From Alberts et al., Molecular Biology of the Cell, 2d ed, p343-4)

Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control of gene action in enzyme synthesis.

Curved bacteria, usually crescent-shaped rods, with ends often tapered, occurring singly, in pairs, or short chains. They are non-encapsulated, non-sporing, motile, and ferment glucose. Selenomonas are found mainly in the human buccal cavity, the rumen of herbivores, and the cecum of pigs and several rodents. (From Bergey's Manual of Determinative Bacteriology, 9th ed)

Enzymes catalyzing the transfer of an acetyl group, usually from acetyl coenzyme A, to another compound. EC 2.3.1.

A class of enzymes that transfers phosphate groups and has a carboxyl group as an acceptor. EC 2.7.2.

A group of enzymes that catalyze the transfer of carboxyl- or carbamoyl- groups. EC 2.1.3.

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.

An enzyme that catalyzes the oxidation of 1-pyrroline-5-carboxylate to L-GLUTAMATE in the presence of NAD. Defects in the enzyme are the cause of hyperprolinemia II.

A rare autosomal recessive disorder of the urea cycle. It is caused by a deficiency of the hepatic enzyme ARGINASE. Arginine is elevated in the blood and cerebrospinal fluid, and periodic HYPERAMMONEMIA may occur. Disease onset is usually in infancy or early childhood. Clinical manifestations include seizures, microcephaly, progressive mental impairment, hypotonia, ataxia, spastic diplegia, and quadriparesis. (From Hum Genet 1993 Mar;91(1):1-5; Menkes, Textbook of Child Neurology, 5th ed, p51)

Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations or by parent x offspring matings carried out with certain restrictions. This also includes animals with a long history of closed colony breeding.

The parent alcohol of the tumor promoting compounds from CROTON OIL (Croton tiglium).

The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence.

This is the active form of VITAMIN B 6 serving as a coenzyme for synthesis of amino acids, neurotransmitters (serotonin, norepinephrine), sphingolipids, aminolevulinic acid. During transamination of amino acids, pyridoxal phosphate is transiently converted into pyridoxamine phosphate (PYRIDOXAMINE).

A crystalline compound used as a laboratory reagent in place of HYDROGEN SULFIDE. It is a potent hepatocarcinogen.

A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. DNA, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine).

The biosynthesis of PEPTIDES and PROTEINS on RIBOSOMES, directed by MESSENGER RNA, via TRANSFER RNA that is charged with standard proteinogenic AMINO ACIDS.

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.

A phorbol ester found in CROTON OIL with very effective tumor promoting activity. It stimulates the synthesis of both DNA and RNA.

An enzyme that catalyzes the formation of carbamoyl phosphate from ATP, carbon dioxide, and glutamine. This enzyme is important in the de novo biosynthesis of pyrimidines. EC 6.3.5.5.

A circumscribed benign epithelial tumor projecting from the surrounding surface; more precisely, a benign epithelial neoplasm consisting of villous or arborescent outgrowths of fibrovascular stroma covered by neoplastic cells. (Stedman, 25th ed)

Derivatives of GLUTAMIC ACID. Included under this heading are a broad variety of acid forms, salts, esters, and amides that contain the 2-aminopentanedioic acid structure.

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.

A species of ascomycetous fungi of the family Sordariaceae, order SORDARIALES, much used in biochemical, genetic, and physiologic studies.

The insertion of recombinant DNA molecules from prokaryotic and/or eukaryotic sources into a replicating vehicle, such as a plasmid or virus vector, and the introduction of the resultant hybrid molecules into recipient cells without altering the viability of those cells.

Established cell cultures that have the potential to propagate indefinitely.

The interference in synthesis of an enzyme due to the elevated level of an effector substance, usually a metabolite, whose presence would cause depression of the gene responsible for enzyme synthesis.

An enzyme that catalyzes the transfer of the propylamine moiety from 5'-deoxy-5'-S-(3-methylthiopropylamine)sulfonium adenosine to spermidine in the biosynthesis of spermine. It has an acidic isoelectric point at pH 5.0. EC 2.5.1.22.

The fission of a CELL. It includes CYTOKINESIS, when the CYTOPLASM of a cell is divided, and CELL NUCLEUS DIVISION.

A group of enzymes that catalyze the reduction of 1-pyrroline carboxylate to proline in the presence of NAD(P)H. Includes both the 2-oxidoreductase (EC 1.5.1.1) and the 5-oxidoreductase (EC 1.5.1.2). The former also reduces 1-piperidine-2-carboxylate to pipecolate and the latter also reduces 1-pyrroline-3-hydroxy-5-carboxylate to hydroxyproline.

Body organ that filters blood for the secretion of URINE and that regulates ion concentrations.

Linear POLYPEPTIDES that are synthesized on RIBOSOMES and may be further modified, crosslinked, cleaved, or assembled into complex proteins with several subunits. The specific sequence of AMINO ACIDS determines the shape the polypeptide will take, during PROTEIN FOLDING, and the function of the protein.

A plant species of the genus DATURA, family SOLANACEAE, that contains TROPANES and other SOLANACEOUS ALKALOIDS.

Any member of the class of enzymes that catalyze the cleavage of the substrate and the addition of water to the resulting molecules, e.g., ESTERASES, glycosidases (GLYCOSIDE HYDROLASES), lipases, NUCLEOTIDASES, peptidases (PEPTIDE HYDROLASES), and phosphatases (PHOSPHORIC MONOESTER HYDROLASES). EC 3.

Hydrocarbons with at least one triple bond in the linear portion, of the general formula Cn-H2n-2.

Molecular enzymology of mammalian Delta1-pyrroline-5-carboxylate synthase. Alternative splice donor utilization generates isoforms with different sensitivity to ornithine inhibition. (1/1042)

Delta1-Pyrroline-5-carboxylate synthase (P5CS; EC not assigned), a mitochondrial inner membrane, ATP- and NADPH-dependent, bifunctional enzyme, catalyzes the reduction of glutamate to Delta1-pyrroline-5-carboxylate, a critical step in the de novo biosynthesis of proline and ornithine. We utilized published plant P5CS sequence to search the expressed sequence tag data base and cloned two full-length human P5CS cDNAs differing in length by 6 base pairs (bp) in the open reading frame. The short cDNA has a 2379-bp open reading frame encoding a protein of 793 residues; the long cDNA, generated by "exon sliding," a form of alternative splicing, contains an additional 6-bp insert following bp +711 of the short form resulting in inclusion of two additional amino acids in the region predicted to be the gamma-glutamyl kinase active site of P5CS. The long form predominates in all tissues examined except gut. We also isolated the corresponding long and short murine P5CS transcripts. To confirm the identity of the putative P5CS cDNAs, we expressed both human forms in gamma-glutamyl kinase- and gamma-glutamyl phosphate reductase-deficient strains of Saccharomyces cerevisiae and showed that they conferred the proline prototrophy. Additionally, we found expression of the murine putative P5CS cDNAs conferred proline prototrophy to P5CS-deficient Chinese hamster ovary cells (CHO-K1). We utilized stable CHO-K1 cell transformants to compare the biochemical characteristics of the long and short murine P5CS isoforms. We found that both confer P5CS activity and that the short isoform is inhibited by L-ornithine with a Ki of approximately 0.25 mM. Surprisingly, the long isoform is insensitive to ornithine inhibition. Thus, the two amino acid insert in the long isoform abolishes feedback inhibition of P5CS activity by L-ornithine. (+info)

Car: a cytoplasmic sensor responsible for arginine chemotaxis in the archaeon Halobacterium salinarum. (2/1042)

A new metabolic signaling pathway for arginine, both a chemoeffector and a fermentative energy source, is described for Halobacterium salinarum. Systematic screening of 80+ potentially chemotactic compounds with two behavioral assays identified leucine, isoleucine, valine, methionine, cysteine, arginine and several peptides as strong chemoattractants. Deletion analysis of a number of potential halobacterial transducer genes led to the identification of Car, a specific cytoplasmic arginine transducer which lacks transmembrane helices and was biochemically shown to be localized in the cytoplasm. Flow assays were used to show specific adaptive responses to arginine and ornithine in wild-type but not Deltacar cells, demonstrating the role of Car in sensing arginine. The signaling pathway from external arginine to the flagellar motor of the cell involves an arginine:ornithine antiporter which was quantitatively characterized for its transport kinetics and inhibitors. By compiling the chemotactic behavior, the adaptive responses and the characteristics of the arginine:ornithine antiporter to arginine and its analogs, we now understand how the combination of arginine uptake and its metabolic conversion is required to build an effective sensing system. In both bacteria and the archaea this is the first chemoeffector molecule of a soluble methylatable transducer to be identified. (+info)

Effect of ornithine and lactate on urea synthesis in isolated hepatocytes. (3/1042)

1. In hepatocytes isolated from 24 h-starved rats, urea production from ammonia was stimulated by addition of lactate, in both the presence and the absence of ornithine. The relationship of lactate concentration to the rate of urea synthesis was hyperbolic. 2. Other glucose precursors also stimulated urea production to varying degrees, but none more than lactate. Added oleate and butyrate did not stimulate urea synthesis. 3. Citrulline accumulation was largely dependent on ornithine concentration. As ornithine was increased from 0 to 40 mM, the rate of citrulline accumulation increased hyperbolically, and was half-maximal when ornithine was 8-12 mM. 4. The rate of citrulline accumulation was independent of the presence of lactate, but with pyruvate the rate increased. 5. The rate of urea production continued to increase as ornithine was varied from 0 to 40 mM. 6. It was concluded that intermediates provided by both ornithine and lactate are limiting for urea production from ammonia in isolated liver cells. It was suggested that the stimulatory effect of lactate lies in increased availability of cytosolic aspartate for condensation with citrulline. (+info)

Arginine biosynthesis in Neisseria gonorrhoeae: enzymes catalyzing the formation of ornithine and citrulline. (4/1042)

Many of the Neisseria gonorrhoeae strains isolated from patients require arginine for growth in a defined medium. As a basis for genetic studies of these Arg- strains, we examined two biosynthetic enzymes of Arg+ (nonrequiring) gonococci. Cell-free extracts contained (i) glutamate acetyltransferase, which catalyzes the formation of L-ornithine from alpha-N-acetyl-L-ornithine, and (ii) ornithine transcaramylase, which catalyzes the reaction between L-ornithine and carbamyl phosphate, yielding L-citrulline. Arg- strains were unable to utilze alpha-N-acetyl-L-ornithine for growth lacked significant activity of glutamate acetyltransferase, and activity was gained by Arg+ clones derived by DNA-mediated transformation. Some of the Arg- patient isolates were unable to use either alpha-N-acetyl-L-ornithine or L-ornithine in place of arginine, and two separate steps of genetic transformation were required to yield Arg+ cells. Extracts of these doubly auxotrophic cells lacked glutamate acetyltransferase activity, but, unexpectedly, they displayed normal ornithine transcarbamylase activity. This finding illustrates the importance of identifying the products specified by arg loci during genetic studies of arginine auxotrophy. (+info)

Proline biosynthesis from L-ornithine in Clostridium sticklandii: purification of delta1-pyrroline-5-carboxylate reductase, and sequence and expression of the encoding gene, proC. (5/1042)

Clostridium sticklandii utilizes combinations of amino acids for growth by Stickland reactions. Proline is an efficient electron acceptor in these reactions and is reduced to 5-aminovalerate. Proline can be partly synthesized from ornithine by the action of ornithine aminotransferase and delta1-pyrroline-5-carboxylate (PCA) reductase. Both enzymes were present in crude extracts of C. sticklandii in sufficient activity of 0.93 nkat (mg protein)(-1) and 4.3 nkat (mg protein)(-1), respectively, whereas enzymes involved in proline biosynthesis from glutamate were not detected. PCA reductase was purified to homogeneity in a three-step procedure involving ammonium sulfate precipitation, affinity chromatography with Procion Red and gel filtration on Sephadex GF200. The homogeneous enzyme was most likely an octamer of 230 kDa with a subunit size of 25 kDa as obtained by SDS-PAGE and 28.9 kDa as calculated from the sequence. Apparent Km values for PCA and NADH were 0.19 mM and 0.025 mM, respectively. The enzyme also catalysed in vitro the reverse reaction, the oxidation of proline, at alkaline pH values above 8 and higher substrate concentrations (apparent Km values: 1.55 mM for proline and 10.5 mM for NAD at pH 10.0). Studies with growing cells of C. sticklandii and [15N]proline revealed that proline is not oxidized in vivo because 15N was solely detected by HPLC-MS in 5-aminovalerate as the product of proline reduction. The proC gene encoding PCA reductase of C. sticklandii was cloned, sequenced and heterologously expressed in Escherichia coli. The enzyme exhibited high homologies to PCA reductases from different sources. Thus, C. sticklandii is able to synthesize the electron acceptor proline from ornithine (a degradation product of arginine) by action of ornithine aminotransferase and PCA reductase. (+info)

Role of ornithine in the N-acetylglutamate turnover in the liver of rats. (6/1042)

We determined whether the synthesis and degradation of N-acetylglutamate would regulate urea synthesis when the ornithine status was manipulated. Experiments were done on two groups of rats, each being treated with ornithine or saline (control). The plasma concentration of urea and the liver concentration of N-acetylglutamate in rats given ornithine were each significantly higher than in the control rats. Compared with the control rats, the liver N-acetylglutamate degradation was significantly lower in those rats treated with ornithine. Treatment of the rats with ornithine did not affect N-acetylglutamate synthesis in the liver. An inverse correlation between the liver N-acetylglutamate degradation and liver concentration of N-acetylglutamate was found. These results suggest that the lower degradation of N-acetylglutamate in the ornithine treatment group would be likely to increase the hepatic concentration of this compound and stimulate urea synthesis. (+info)

Expression of Escherichia coli K-12 arginine genes in Pseudomonas fluorescens. (7/1042)

Escherichia coli argE and argH gene products were detected in Pseudomonas fluorescens argH122 carrying the E. coli F110 plasmid. (+info)

The carbamoyl-phosphate synthetase of Pyrococcus furiosus is enzymologically and structurally a carbamate kinase. (8/1042)

The hyperthermophiles Pyrococcus furiosus and Pyrococcus abyssi make pyrimidines and arginine from carbamoyl phosphate (CP) synthesized by an enzyme that differs from other carbamoyl-phosphate synthetases and that resembles carbamate kinase (CK) in polypeptide mass, amino acid sequence, and oligomeric organization. This enzyme was reported to use ammonia, bicarbonate, and two ATP molecules as carbamoyl-phosphate synthetases to make CP and to exhibit bicarbonatedependent ATPase activity. We have reexamined these findings using the enzyme of P. furiosus expressed in Escherichia coli from the corresponding gene cloned in a plasmid. We show that the enzyme uses chemically made carbamate rather than ammonia and bicarbonate and catalyzes a reaction with the stoichiometry and equilibrium that are typical for CK. Furthermore, the enzyme catalyzes actively full reversion of the CK reaction and exhibits little bicarbonate-dependent ATPase. In addition, it cross-reacts with antibodies raised against CK from Enterococcus faecium, and its three-dimensional structure, judged by x-ray crystallography of enzyme crystals, is very similar to that of CK. Thus, the enzyme is, in all respects other than its function in vivo, a CK. Because in other organisms the function of CK is to make ATP from ADP and CP derived from arginine catabolism, this is the first example of using CK for making rather than using CP. The reasons for this use and the adaptation of the enzyme to this new function are discussed. (+info)

L-ornithine and L-aspartate[edit]. L-ornithine and L-aspartate (LOLA) lowers the level of ammonia in a person's blood.[20] Very ... "L-ornithine L-aspartate for prevention and treatment of hepatic encephalopathy in people with cirrhosis". The Cochrane Database ...

https://en.wikipedia.org/wiki/Hepatic_encephalopathy

Metabolism of ornithine. Pyridoxal phosphate is a cofactor of ornithine carboxylase. Transamination. Pyridoxal phosphate takes ... Aromatic-L-amino-acid decarboxylase Ornithine decarboxylase Calculated using Advanced Chemistry Development (ACD/Labs) Software ... Gabaculine and Vigabatrin inhibit GABA aminotransferase Canaline and 5-fluoromethylornithine inhibit ornithine aminotransferase ...

https://en.wikipedia.org/wiki/Pyridoxal_phosphate

Elevated urinary orotic acid levels can also arise secondary to blockage of the urea cycle, particularly in ornithine ... Wraith, J. E. (2001). "Ornithine carbamoyltransferase deficiency". Archives of Disease in Childhood. 84 (1): 84-88. doi:10.1136 ...

https://en.wikipedia.org/wiki/Orotic_aciduria

OFD1 Ornithine transcarbamylase deficiency; 311250; OTC Orofacial cleft 11; 600625; BMP4 Orofacial cleft 5; 608874; MSX1 ...

https://en.wikipedia.org/wiki/List_of_OMIM_disorder_codes

nov., with peptidoglycan containing ornithine. Int. J. Syst. Bacteriol., 1987, 37, 62-67. Rainey FA, Nobre MF, Schumann P, ...

https://en.wikipedia.org/wiki/Deinococcus

Tsuda Y, Friedmann HC (1970). "Ornithine metabolism by Clostridium sticklandii. Oxidation of ornithine to 2-amino-4- ... and d-arginine and d-ornithine metabolism. Somack R, Costilow RN (1973). "2,4-diaminopentanoic acid C 4 dehydrogenase. ...

https://en.wikipedia.org/wiki/2,4-diaminopentanoate_dehydrogenase

Antagonistic effects of L-ornithine". J. Biol. Chem. 277 (40): 37630-6. doi:10.1074/jbc.M203648200. PMID 12145284. Tang D, ...

https://en.wikipedia.org/wiki/BH3_interacting-domain_death_agonist

... has been used as a food acidulant since 1946. It is approved for use as a food additive in the EU,[3] USA[4] and Australia and New Zealand.[5] As a food additive, it is used as an acidity regulator and can be denoted by the E number E297. It is generally used in beverages and baking powders for which requirements are placed on purity. Fumaric acid is used in the making of wheat tortillas as a food preservative and as the acid in leavening.[6] It is generally used as a substitute for tartaric acid and occasionally in place of citric acid, at a rate of 1 g of fumaric acid to every ~1.5 g of citric acid, in order to add sourness, similarly to the way malic acid is used. As well as being a component of some artificial vinegar flavors, such as "Salt and Vinegar" flavored potato chips,[7] it is also used as a coagulant in stove-top pudding mixes. The European Commission Scientific Committee on Animal Nutrition, part of DG Health, found in 2014 that fumaric acid is "practically non-toxic" ...

https://en.wikipedia.org/wiki/E297

At present, it is thought that the depletion of the ornithine supply causes the accumulation of carbamyl-phosphate in the urea ... These are lysine, arginine, and ornithine. These amino acids are found in many protein-rich foods. Since in this disorder the ... L-Homocitrulline is an amino acid and a metabolite of ornithine in mammalian (including human) metabolism. The amino acid can ... 1983 Mar;102(3):388-90 Simell O, Mackenzie S, Clow CL, Scriver CR: Ornithine loading did not prevent induced hyperammonemia in ...

https://en.wikipedia.org/wiki/Homocitrulline

Ornithine "Corbicula japonica, Japanese corbicula : fisheries". www.sealifebase.ca. Retrieved 2020-03-31. Ishihara, Yukio; Ueta ...

https://en.wikipedia.org/wiki/Corbicula_japonica

Ornithine Decarboxylase tests yield negative results. Treatment for shigellosis, independent of the subspecies, requires an ...

https://en.wikipedia.org/wiki/Shigella_dysenteriae

"Entrez Gene: ODC1 ornithine decarboxylase 1". Pegg AE (May 2006). "Regulation of ornithine decarboxylase". The Journal of ... "Expression of human chromosome 2 ornithine decarboxylase gene in ornithine decarboxylase-deficient Chinese hamster ovary cells ... Ornithine decarboxylase is an enzyme that in humans is encoded by the ODC1 gene. This gene encodes the rate-limiting enzyme of ... 1986). "Human ornithine decarboxylase sequences map to chromosome regions 2pter----p23 and 7cen----qter but are not coamplified ...

https://en.wikipedia.org/wiki/ODC1

Ornithine transcarbamylase deficiency; developmental delay and mental retardation. Progressive liver damage, skin lesions, and ...

https://en.wikipedia.org/wiki/X-linked_recessive_inheritance

N2-acetyl-L-ornithine:2-oxoglutarate aminotransferase, succinylornithine aminotransferase, and 2-N-acetyl-L-ornithine:2- ... The systematic name of this enzyme class is N2-acetyl-L-ornithine:2-oxoglutarate 5-aminotransferase. Other names in common use ... Vogel HJ (1953). "Path of Ornithine Synthesis in Escherichia Coli". Proc. Natl. Acad. Sci. U.S.A. 39 (7): 578-83. Bibcode: ... the two substrates of this enzyme are N2-acetyl-L-ornithine and 2-oxoglutarate, whereas its two products are N-acetyl-L- ...

https://en.wikipedia.org/wiki/Acetylornithine_transaminase

Other names in common use include ornithine transacetylase, alpha-N-acetyl-L-ornithine:L-glutamate N-acetyltransferase, ... L-ornithine + N-acetyl-L-glutamate Thus, the two substrates of this enzyme are N2-acetyl-L-ornithine and L-glutamate, whereas ... ornithine acetyltransferase, and 2-N-acetyl-L-ornithine:L-glutamate N-acetyltransferase. This enzyme participates in urea cycle ... The systematic name of this enzyme class is N2-acetyl-L-ornithine:L-glutamate N-acetyltransferase. ...

https://en.wikipedia.org/wiki/Glutamate_N-acetyltransferase

Lysine, ornithine and citrulline all have an affinity for cyanophycin synthase (L-aspartate-adding) enzyme CphA. Wiefel, Bröker ... This trend is also similar for ornithine. Krehenbrink M, Oppermann-Sanio FB, Steinbüchel A (May 2002). "Evaluation of non- ... of lysine to partially replace the arginine side chain encouraged research of CPG variants with amino acids such as ornithine ...

https://en.wikipedia.org/wiki/Cyanophycin

Ornithine decarboxylase antizyme is an enzyme that in humans is encoded by the OAZ1 gene. Ornithine decarboxylase catalyzes the ... The ornithine decarboxylase antizymes play a role in the regulation of polyamine synthesis by binding to and inhibiting ... "Entrez Gene: OAZ1 ornithine decarboxylase antizyme 1". Coffino P (2000). "Polyamines in spermiogenesis: not now, darling". Proc ... 2007). "Ornithine decarboxylase antizyme upregulates DNA-dependent protein kinase and enhances the nonhomologous end-joining ...

https://en.wikipedia.org/wiki/OAZ1

... ornithine-devouring, utilizing ornithine.) A. ratkowskyi ( Bowman et al. 2003, (Type species of the genus).; New Latin genitive ... 2007, ; New Latin neuter gender noun ornithinum, ornithine; Latin participle adjective vorans, devouring; New Latin participle ...

https://en.wikipedia.org/wiki/Algoriphagus

L-ornithine Thus, the two substrates of this enzyme are N2-acetyl-L-ornithine and H2O, whereas its two products are acetate and ... Vogel HJ (1953). "Path of Ornithine Synthesis in Escherichia Coli". Proc. Natl. Acad. Sci. U.S.A. 39 (7): 578-83. Bibcode: ... The systematic name of this enzyme class is N2-acetyl-L-ornithine amidohydrolase. Other names in common use include ... is an enzyme that catalyzes the chemical reaction N2-acetyl-L-ornithine + H2O ⇌ {\displaystyle \rightleftharpoons } acetate + ...

https://en.wikipedia.org/wiki/Acetylornithine_deacetylase

The actual reaction catalyzed by AGAT is the synthesis of guanidinoacetate from arginine and glycine, with ornithine as a ... The products are L-ornithine and glycocyamine, also known as guanidinoacetate, the immediate precursor of creatine. Creatine ... Sipilä I (1980). "Inhibition of arginine-glycine amidinotransferase by ornithine. A possible mechanism for the muscular and ... which leaves as L-ornithine. The His303 residue then extracts a proton from glycine, which then picks up the amidino group from ...

https://en.wikipedia.org/wiki/Arginine:glycine_amidinotransferase

Ornithine decarboxylase antizyme 2 is an enzyme that in humans is encoded by the OAZ2 gene. Ornithine decarboxylase catalyzes ... The ornithine decarboxylase antizymes play a role in the regulation of polyamine synthesis by binding to and inhibiting ... "Entrez Gene: OAZ2 ornithine decarboxylase antizyme 2". Coffino P (2000). "Polyamines in spermiogenesis: not now, darling". Proc ... Zhou J, Atkins JF, Gesteland RF (Jul 1999). "Structure of human ornithine decarboxylase antizyme 2 gene". Gene. 232 (2): 165-71 ...

https://en.wikipedia.org/wiki/OAZ2

nov., which contain ornithine in their cell walls". International Journal of Systematic and Evolutionary Microbiology. 52 (Pt 6 ...

https://en.wikipedia.org/wiki/Psychrobacillus_psychrodurans

Other names in common use include arginine succinyltransferase, AstA, arginine and ornithine N2-succinyltransferase, AOST, AST ... "N2-succinylornithine in ornithine catabolism of Pseudomonas aeruginosa". Arch. Microbiol. 150 (4): 400-4. doi:10.1007/ ... "Purification and properties of a succinyltransferase from Pseudomonas aeruginosa specific for both arginine and ornithine". Eur ...

https://en.wikipedia.org/wiki/Arginine_N-succinyltransferase

Ornithine and S-adenosylmethionine are precursors of polyamines. Aspartate, glycine, and glutamine are precursors of ... ornithine and citrulline occur in the urea cycle, part of amino acid catabolism (see below). A rare exception to the dominance ... and eflornithine drug that inhibits ornithine decarboxylase and used in the treatment of sleeping sickness. Since 2001, 40 non- ...

https://en.wikipedia.org/wiki/Amino_acid

nov., a soil actinomycete which contains L-ornithine". International Journal of Systematic Bacteriology. 49 Pt 4 (4): 1717-24. ...

https://en.wikipedia.org/wiki/Ornithinicoccus_hortensis

Vander Wauven C, Jann A, Haas D, Leisinger T, Stalon V (1988). "N2-succinylornithine in ornithine catabolism of Pseudomonas ... "Purification and properties of a succinyltransferase from Pseudomonas aeruginosa specific for both arginine and ornithine". Eur ...

https://en.wikipedia.org/wiki/Succinylglutamate-semialdehyde_dehydrogenase

CP then enters the urea cycle in which it reacts with ornithine (a process catalyzed by the enzyme ornithine transcarbamylase) ... Ornithine transcarbamylase Citrulline Urea Cycle Bhagavan, N. V.; Ha, Chung-Eun (2015-01-01), Bhagavan, N. V.; Ha, Chung-Eun ( ...

https://en.wikipedia.org/wiki/Carbamoyl_phosphate

Grishin NV, Phillips MA, Goldsmith EJ (July 1995). "Modeling of the spatial structure of ornithine decarboxylases". Protein Sci ...

https://en.wikipedia.org/wiki/Tryptophan_synthase

Ornithine decarboxylase Internal ribosome entry site Pyronnet, S; Pradayrol, L; Sonenberg, N (April 2000). "A cell cycle- ... It has been suggested that this IRES allows cap-independent translation of ornithine decarboxylase at the G2/M phase of the ... Origanti, S; Shantz, LM (May 15, 2007). "Ras transformation of RIE-1 cells activates cap-independent translation of ornithine ... UTR of ornithine decarboxylase mRNA on its translation". Biochemical and Biophysical Research Communications. 364 (1): 124-130 ...

https://en.wikipedia.org/wiki/ODC_internal_ribosome_entry_site_(IRES)

Thus the urea cycle (or "ornithine cycle") was established, and it was the first metabolic cycle to be discovered. At the ... Before a year was over at Freiburg, he, with research student Kurt Henseleit, published their discovery of the ornithine cycle ... Using his Warburg manometer, he mixed a slice of liver with purified ornithine and citrulline. He found that citrulline acted ... Based on this reaction, Krebs and Henseleit postulated that in living cells, similar reaction could occur, and that ornithine ...

https://en.wikipedia.org/wiki/Hans_Krebs_(biochemist)

L-Ornithine L-aspartate (LOLA), a stable salt of ornithine and aspartic acid, has been used in the treatment of cirrhosis.[8] ... L-Ornithine is one of the products of the action of the enzyme arginase on L-arginine, creating urea. Therefore, ornithine is a ... Ornithine is a non-proteinogenic amino acid that plays a role in the urea cycle. Ornithine is abnormally accumulated in the ... Ornithine, via the action of ornithine decarboxylase (E.C. 4.1.1.17), is the starting point for the synthesis of polyamines ...

https://en.wikipedia.org/wiki/Ornithine

1. ornithine, amino acid, aminoalkanoic acid. usage: an amino acid that does not occur in proteins but is important in the ...

https://www.infoplease.com/thesaurus/ornithine

Ornithine translocase deficiency is an inherited disorder that causes ammonia and other substances to build up (accumulate) in ... Because ornithine translocase deficiency is caused by problems with the urea cycle, it belongs to a class of genetic diseases ... As a result, ornithine transport is impaired and the urea cycle cannot proceed normally. This causes, nitrogen to accumulate in ... Ornithine translocase deficiency varies widely in its severity and age of onset. Affected infants show signs and symptoms of ...

https://medlineplus.gov/genetics/condition/ornithine-translocase-deficiency/

Ornithine transcarbamylase deficiency is an inherited disorder that causes ammonia to accumulate in the blood. Explore symptoms ... In ornithine transcarbamylase deficiency, as its name suggests, the ornithine transcarbamylase enzyme is damaged or missing. ... The OTC gene provides instructions for making the ornithine transcarbamylase enzyme.. Ornithine transcarbamylase deficiency ... Ornithine transcarbamylase deficiency can become evident at any age. The most severe form occurs in the first few days of life ...

https://medlineplus.gov/genetics/condition/ornithine-transcarbamylase-deficiency/

... in a reaction catalyzed by ornithine transcarbamoylase; the products are citrulline and inorganic phosphate [31]. Citrulline ... Other articles where Ornithine transcarbamoylase is discussed: metabolism: Disposal of nitrogen: … ... in a reaction catalyzed by ornithine transcarbamoylase; the products are citrulline and inorganic phosphate [31]. Citrulline ...

https://www.britannica.com/science/ornithine-transcarbamoylase

N2-succinyl-L-ornithine (CHEBI:27574) is a N2-acyl-L-ornithine (CHEBI:21815) N2-succinyl-L-ornithine (CHEBI:27574) is conjugate ... CHEBI:27574 - N2-succinyl-L-ornithine. Main. ChEBI Ontology. Automatic Xrefs. Reactions. Pathways. Models. ... N2-succinyl-L-ornithinate(1−) (CHEBI:58514) is conjugate base of N2-succinyl-L-ornithine (CHEBI:27574). ... N2-succinyl-L-ornithine (CHEBI:27574) has role Escherichia coli metabolite (CHEBI:76971) ...

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:21822

Other names in common use include ornithine cyclase, ornithine cyclase (deaminating), and L-ornithine ammonia-lyase (cyclizing ... In enzymology, an ornithine cyclodeaminase (EC 4.3.1.12) is an enzyme that catalyzes the chemical reaction L-ornithine ⇌ {\ ... Costilow RN, Laycock L (1971). "Ornithine cyclase (deaminating). Purification of a protein that converts ornithine to proline ... Alam S, Wang SC, Ruzicka FJ, Frey PA, Wedekind JE (2004). "Crystallization and X-ray diffraction analysis of ornithine ...

https://en.wikipedia.org/wiki/Ornithine_cyclodeaminase

... an enzyme of hepatic mitochondria that catalyzes the conversion of ornithine to citrulline as part of urea formation and that ... when deficient in the body results in hyperammonemia, vomiting, coma, seizures, and sometimes death -called also ornithine ... Share ornithine transcarbamylase. Post the Definition of ornithine transcarbamylase to Facebook Share the Definition of ... Resources for ornithine transcarbamylase. Time Traveler: Explore other words from the year ornithine transcarbamylase first ...

https://www.merriam-webster.com/medical/ornithine%20transcarbamylase

InterPro provides functional analysis of proteins by classifying them into families and predicting domains and important sites. We combine protein signatures from a number of member databases into a single searchable resource, capitalising on their individual strengths to produce a powerful integrated database and diagnostic tool.

https://www.ebi.ac.uk/interpro/protein/O95190

Brands A-Z Doctors Best L-Ornithine Categories Supplements Amino Acids L-Ornithine Categories Sports Nutrition Post-Workout ... Doctors Best, L-Ornithine 1 Results (showing 1 - 1 ) Visit Manufacturers Website » ... Doctors Best, Pure L-Ornithine Powder, Unflavored, 7.1 oz (200 g). 5 ...

https://www.iherb.com/c/doctor-s-best/L-Ornithine

FDAs Bacteriological Analytical Manual (BAM) presents the agencys preferred laboratory procedures for microbiological analyses of foods and cosmetics.

https://www.fda.gov/food/laboratory-methods-food/bam-media-m99-motility-indole-ornithine-mio-medium

... user ratings and products that contain Ornithine Ketoglutarate ... Dont confuse ornithine ketoglutarate with ornithine or another ... Learn more about Ornithine Ketoglutarate uses, effectiveness, possible side effects, interactions, dosage, ... ornithine alpha-ketoglutarate, OAKG, OKG, Ornicetil, Ornithine Alpha-Ceto Glutarate, Ornithine Alpha Ketoglutarate, Ornithine ... ORNITHINE KETOGLUTARATE. OTHER NAME(S): 2-Oxopentanedioic Acid L-Ornithine, ACO, Alpha-Cétoglutarate de L-Ornithine, Alpha- ...

https://www.webmd.com/vitamins/ai/ingredientmono-642/ornithine-ketoglutarate

Understand more about Ornithine Ketoglutarate uses, health benefits, side effects, interactions, safety concerns, and ... L-Ornithine Alpha-Ketoglutarate, L(+)-ornithine alpha-ketoglutarate, OKG, Ornicetil, Ornithine Alpha Ketoglutarate, Ornitina ... What is Ornithine Ketoglutarate?. Ornithine ketoglutarate is an amino acid. The body uses amino acids to build proteins. ... How does Ornithine Ketoglutarate work?. Ornithine ketoglutarate might change the way amino acids, the building blocks of ...

https://www.medicinenet.com/ornithine_ketoglutarate/supplements-vitamins.htm

Ornithine plays an important role in the urea cycle and is the precursor of the amino acids citrulline, glutamic acid, and ... Ornithine plays an important role in the urea cycle and is the precursor of the amino acids citrulline, glutamic acid, and ... Another primary role of ornithine is being an intermediate in arginine biosynthesis, although this is due to its participation ... in the urea cycle (responsible for the production of urea). Ornithine is not directly incorporated into proteins and enzymes ...

https://micro.magnet.fsu.edu/aminoacids/pages/ornithine.html

FDAs Bacteriological Analytical Manual (BAM) presents the agencys preferred laboratory procedures for microbiological analyses of foods and cosmetics.

https://www.fda.gov/food/laboratory-methods-food/bam-media-m44-decarboxylase-basal-medium-arginine-lysine-ornithine

Ornithine transcarbamylase (OTC) deficiency is an X-linked genetic disorder of the urea cycle that leads to elevated levels of ... encoded search term (Ornithine Transcarbamylase (OTC) Deficiency) and Ornithine Transcarbamylase (OTC) Deficiency What to Read ... and ornithine (8); the mediating enzyme is ornithine transcarbamylase. Compound 3 is aspartic acid, which is combined with ... and ornithine (8); the mediating enzyme is ornithine transcarbamylase. Compound 3 is aspartic acid, which is combined with ...

https://emedicine.medscape.com/article/950672-overview

Ornithine transcarbamylase deficiency, the most common urea cycle disorder, is an X‐linked trait displaying large heterogeneity ... Ornithine Transcarbamylase Deficiency: Genetics. Luisa Azevedo, University of Porto, Porto, Portugal Ana Sofia Oliveira, ... Ornithine transcarbamylase deficiency, the most common urea cycle disorder, is an X‐linked trait displaying large heterogeneity ... 1984) Human ornithine transcarbamylase locus mapped to band Xp21.1 near to Duchenne muscular dystrophy locus. Science 226: 698- ...

http://www.els.net/WileyCDA/ElsArticle/refId-a0005942.html

Ornithine transcarbamylase (OTC) deficiency is an X-linked recessive disorder that leads to hyperammonemia and liver damage. ... Ornithine transcarbamylase (OTC) is located within mitochondria. It converts carbamoyl phosphate and ornithine into citrulline ... Hepatocellular Adenoma in a Patient with Ornithine Transcarbamylase Deficiency. Lin Cheng. ,1 Yajuan Liu. ,2 Wenjing Wang. ,2 J ... Ornithine transcarbamylase (OTC) deficiency is an X-linked recessive disorder that leads to hyperammonemia and liver damage. ...

https://www.hindawi.com/journals/crihep/2019/2313791/

An enzyme that catalyzes the reaction between carbamoyl phosphate and ornithine to form citrulline and phosphate.... ... ornithine-transcarbamylase. Noun (uncountable). *(biochemistry) An enzyme that catalyzes the reaction between carbamoyl ... ornithine-transcarbamylase. (n.d.). Retrieved January 14th, 2019, from https://www.yourdictionary.com/ornithine- ... "ornithine-transcarbamylase." YourDictionary, n.d. Web. 14 January 2019. ,https://www.yourdictionary.com/ornithine- ...

https://www.yourdictionary.com/ornithine-transcarbamylase

L-Ornithine. L-ornithine. CAS information. CAS number:. 70-26-8. Molecular and structural information. Molecular formula:. ... L-ornithine. CAS number:. 70-26-8. No inventory information available. Reference substance information. IUPAC name:. (2S)-2,5- ...

https://echa.europa.eu/registration-dossier/-/registered-dossier/23820/11/?documentUUID=c0dc27e9-ab52-409c-bba4-ba18559bba7f

Reversibly catalyzes the transfer of the carbamoyl group from carbamoyl phosphate (CP) to the N(epsilon) atom of ornithine (ORN ...

https://www.rcsb.org/pdb/protein/C0RH19

Reversibly catalyzes the transfer of the carbamoyl group from carbamoyl phosphate (CP) to the N(epsilon) atom of ornithine (ORN ...

https://www.rcsb.org/pdb/protein/P18186

Mouse monoclonal ornithine aminotransferase antibody [AT23A2] validated for WB, ELISA, IHC, Flow Cyt, ICC/IF and tested in ... Ornithine aminotransferase (OAT) is a key mitochondrial enzyme in the pathway that converts arginine and ornithine into the ... Anti-ornithine aminotransferase antibody [AT23A2] (ab100845) at 1/1000 dilution + Mouse Liver Tissue Lysate at 35 µg. Secondary ... IHC image of ornithine aminotransferase staining in Human normal liver formalin fixed paraffin embedded tissue section, ...

http://www.abcam.com/ornithine-aminotransferase-antibody-at23a2-ab100845.html

Buy our Recombinant Human Ornithine Decarboxylase protein. Ab114536 is a full length protein produced in Wheat germ and has ... Recombinant Human Ornithine Decarboxylase protein. See all Ornithine Decarboxylase proteins and peptides. ... Amine and polyamine biosynthesis; putrescine biosynthesis via L-ornithine pathway; putrescine from L-ornithine: step 1/1. ...

http://www.abcam.com/recombinant-human-ornithine-decarboxylase-protein-ab114536.html

Ornithine carbamoyltransferase genes and phaseolotoxin immunity in Pseudomonas syringae pv. phaseolicola.. Peet RC1, Panopoulos ... Two different DNA fragments encoding ornithine carbamoyltransferase (OCTase) were cloned from Pseudomonas syringae pv. ...

https://www.ncbi.nlm.nih.gov/pubmed/16453811?dopt=Abstract

Ontogeny of ornithine-urea cycle gene expression in zebrafish (Danio rerio).. LeMoine CM1, Walsh PJ. ... In zebrafish, it is unclear whether this results from a functional ornithine-urea cycle (O-UC) and, if so, how it might be ... ornithine transcarboxylase, arginosuccinate synthetase, and arginosuccinate lyase, using real-time PCR and whole mount in situ ...

https://www.ncbi.nlm.nih.gov/pubmed/23576614?dopt=Abstract

Growth hormone (GH) is the major hormone in the human body that maintains healthy muscle status (anabolic hormones such as GH build up living cells). In adulthood, GH levels gradually decline in humans. The author of this article proposes a new, patented technique for increasing night-time GH release by using 25-100 mg. l-ornithine and 500 […]. View Post ...

http://www.rainbow.coop/nutritional-library/supplement/ornithine/

Shop eVitamins to get the lowest prices for Twinlab Ornithine. Read reviews, get coupons and even receive free shipping on ...

https://www.evitamins.com/twinlab/ornithine

Arginine and ornithine supplements can be used to boost your levels of these amino acids, but the metabolism of these amino ... Talk to your doctor before taking arginine and ornithine supplements. ... Arginine, Ornithine and Human Growth Hormone. Amino acids are the building blocks for proteins, but some of them are also ... Arginine and ornithine supplements can be used to boost your levels of these amino acids, but the metabolism of these amino ...

https://www.livestrong.com/article/466778-l-arginine-l-ornithine-effect-on-kidneys/?utm_source=livestrong_opar&utm_medium=3

L -Ornithine is one of the products of the action of the enzyme arginase on L - arginine , creating urea . (wikipedia.org)
The OTC gene provides instructions for making the ornithine transcarbamylase enzyme. (medlineplus.gov)
The ornithine transcarbamylase enzyme starts a specific reaction within the urea cycle. (medlineplus.gov)
In ornithine transcarbamylase deficiency, as its name suggests, the ornithine transcarbamylase enzyme is damaged or missing. (medlineplus.gov)
In enzymology, an ornithine cyclodeaminase (EC 4.3.1.12) is an enzyme that catalyzes the chemical reaction L-ornithine ⇌ {\displaystyle \rightleftharpoons } L-proline + NH4 Hence, this enzyme has one substrate, L-ornithine, and two products, L-proline and NH4. (wikipedia.org)
the mediating enzyme is ornithine transcarbamylase. (medscape.com)
A mutant enzyme protein impairs the reaction that leads to condensation of carbamyl phosphate and ornithine to form citrulline. (medscape.com)
biochemistry) An enzyme that catalyzes the reaction between carbamoyl phosphate and ornithine to form citrulline and phosphate . (yourdictionary.com)
Ornithine aminotransferase (OAT) is a key mitochondrial enzyme in the pathway that converts arginine and ornithine into the major excitatory and inhibitory neurotransmitters glutamate and GABA. (abcam.com)
Ornithine aminotransferase (OAT) is an enzyme which is encoded in human by the OAT gene located on chromosome 10 . (wikidoc.org)
Ornithine translocase deficiency , also called Hyperonithinemia-Hyperammonemia-Homocitrullinuria (HHH) syndrome , [1] is a rare autosomal recessive [2] urea cycle disorder affecting the enzyme ornithine translocase , which causes ammonia to accumulate in the blood, a condition called hyperammonemia . (wikidoc.org)
The enzyme developed maximum activity when lichen thalli were floated on 40 mML-ornithine. (csic.es)
ODC1 encodes the rate-limiting enzyme of the polyamine biosynthesis pathway which catalyzes ornithine to putrescine. (antibodies-online.com)
The liver uses the enzyme arginase and the amino acid L-arginine to synthesize urea and L-ornithine as part of the urea cycle. (xtend-life.com)
The most common urea cycle enzyme deficiency disorder inherited as an autosomal recessive trait, characterized by the absence of ornithine transcarbamylase (an enzyme in the urea cycle), which results in the excessive buildup of ammonia in the bloodstream. (thefreedictionary.com)
Antizyme inhibitors (AZINs) regulate the cellular uptake of polyamines and activate ornithine decarboxylase (ODC), the rate-limiting enzyme of polyamine synthesis. (wiley.com)
Polyamines and their rate-limiting enzyme, ornithine decarboxylase (ODC), are actively involved in cell growth and differentiation. (encognitive.com)
This study determined the effects of the estrous cycle, pregnancy, progesterone, and interferon tau (IFNT) on expression of NO synthases ( NOS1 , NOS2 , and NOS3 ), guanosine triphosphate (GTP) cyclohydrolase ( GCH1 , the key enzyme in de novo synthesis of tetrahydrobiopterin, a cofactor for NO production), and ornithine decarboxylase ( ODC1 ) in uterine endometria in cyclic ewes (Days 10-16) and pregnant ewes (Days 10-20). (bioone.org)

Ornithine ketoglutarate is a salt made from the amino acid ornithine and the glutamine precursor alpha-ketoglutarate. (webmd.com)
Ornithine alpha-ketoglutarate (OKG) is manufactured from two amino acids, ornithine and glutamine. (memorialhealth.com)
Nutritional and clinical efficacy of ornithine alpha-ketoglutarate in severe burn patients. (memorialhealth.com)
Jeevanandam M, Holaday NJ, Petersen SR. Ornithine-alpha-ketoglutarate (OKG) supplementation is more effective than its component salts in traumatized rats. (memorialhealth.com)
Ornithine Alpha-Ketoglutarate or OKG is formed from two molecules of the amino acid L-ornithine, and one alpha-ketoglutarate molecule. (allstarhealth.com)
OKG (Ornithine alpha-Ketoglutarate) is a combination of the amino acid ornithine and alpha-ketoglutaric acid (AKG). (vitasprings.com)
Source Naturals Ornithine alpha-Ketoglutarate OKG is suitable for vegetarians and HYPOALLERGENIC. (vitasprings.com)

The nitrogens of urea come from the ammonia and aspartate, and the nitrogen in ornithine remains intact. (wikipedia.org)
The results suggested that L -ornithine has an antifatigue effect in increasing the efficiency of energy consumption and promoting the excretion of ammonia. (wikipedia.org)
Ornithine translocase deficiency is an inherited disorder that causes ammonia and other substances to build up (accumulate) in the blood. (medlineplus.gov)
This rapid increase of ammonia likely leads to the signs and symptoms of ornithine translocase deficiency. (medlineplus.gov)
Ammonia is especially damaging to the brain, and excess ammonia causes neurological problems and other signs and symptoms of ornithine translocase deficiency. (medlineplus.gov)
Ammonia is especially damaging to the nervous system, so ornithine transcarbamylase deficiency causes neurological problems as well as eventual damage to the liver. (medlineplus.gov)
Other names in common use include ornithine cyclase, ornithine cyclase (deaminating), and L-ornithine ammonia-lyase (cyclizing). (wikipedia.org)
Ornithine transcarbamylase (OTC) deficiency is an X-linked genetic disorder of the urea cycle that leads to elevated levels of ammonia in the blood. (medscape.com)
Ornithine is a non-essential amino acids that plays a central role in the urea cycle, functioning along with arginine and citrulline to rid the body of ammonia, a by-product of protein metabolism. (iherb.com)
This failure of ornithine transport causes an interruption of the urea cycle and the accumulation of ammonia, resulting in the signs and symptoms of ornithine translocase deficiency. (wikidoc.org)
L-ornithine stimulates the urea cycle, with resulting loss of ammonia. (medscape.com)
L-ornithine is a catalyst in the process that converts ammonia into urea, which can be eliminated through urine. (xtend-life.com)
L-ornithine may support liver functioning by managing ammonia levels. (xtend-life.com)
Due its role in the breakdown of ammonia, ornithine is used as a treatment for diseases which involve a build up of the compound in bodily fluids. (mrsupplement.com.au)
Ornithine has been demonstrated to significantly reduce the levels of ammonia, particularly at high doses. (mrsupplement.com.au)
L-Ornithine L-aspartate has been shown to reduce blood ammonia concentrations by increasing ammonia detoxification in the liver. (kyowa-usa.com)
L-ornithine L-aspartate(LOLA) is a licensed drug in Germany and has been shown to promote ammonia elimination from the body in the form of urea. (clinicaltrials.gov)
L-Ornithine is a non-essential amino acid which plays an important role in the urea cycle, to eliminate excess ammonia from the body. (tasmanhealth.co.nz)
Determine the Safety, Tolerability and Pharmacokinetics of single doses of ARCT-810 in Clinically Stable Patients (stable on standard of care treatment, e.g., diet ± ammonia scavengers) with Ornithine Transcarbamylase Deficiency. (clinicaltrials.gov)
The conversion of arginine into ornithine and ornithine into citrulline increases urea production while lowering ammonia concentrations in the blood. (hgh.com)
Because L-ornithine helps accelerate the excretion of ammonia, it is believed to promote proper liver function, prevent fatigue and enhance performance during prolonged exercise. (hgh.com)
For example, a group of Polish researchers reported that L-ornithine-L-aspartate (LOLA) supplementation has the ability to lower blood ammonia concentration, eliminate symptoms of hepatic encephalopathy associated with liver cirrhosis and stimulate tissue regeneration, while a Japanese study determined that healthy office workers who consumed a combination of caffeine and ornithine had higher mood ratings, less fatigue and better concentration than those who consumed caffeine alone. (hgh.com)

10 years that there are two alleles of the human ornithine decarboxylase ( ODC ) gene, defined by a polymorphic Pst I RFLP in intron 1. (aacrjournals.org)
Hickok NJ, Seppanen PJ, Gunsalus GL, Janne OA: Complete amino acid sequence of human ornithine decarboxylase deduced from complementary DNA. (hmdb.ca)
Fitzgerald MC, Flanagan MA: Characterization and sequence analysis of the human ornithine decarboxylase gene. (hmdb.ca)
van Steeg H, van Oostrom CT, Martens JW, van Kreyl C, Schepens J, Wieringa B: Nucleotide sequence of the human ornithine decarboxylase gene. (hmdb.ca)
Hickok NJ, Wahlfors J, Crozat A, Halmekyto M, Alhonen L, Janne J, Janne OA: Human ornithine decarboxylase-encoding loci: nucleotide sequence of the expressed gene and characterization of a pseudogene. (hmdb.ca)

However, in mammalian non-hepatic tissues, the main use of the urea cycle is in arginine biosynthesis, so, as an intermediate in metabolic processes, ornithine is quite important. (wikipedia.org)
Another primary role of ornithine is being an intermediate in arginine biosynthesis, although this is due to its participation in the urea cycle (responsible for the production of urea). (fsu.edu)
Catalyzes the first and rate-limiting step of polyamine biosynthesis that converts ornithine into putrescine, which is the precursor for the polyamines, spermidine and spermine. (uniprot.org)
Mammalian ornithine decarboxylase (ODC), which catalyses the first step in polyamine biosynthesis, has a very fast turnover. (lu.se)

Ornithine plays an important role in the urea cycle and is the precursor of the amino acids citrulline, glutamic acid, and proline. (fsu.edu)
Reversibly catalyzes the transfer of the carbamoyl group from carbamoyl phosphate (CP) to the N(epsilon) atom of ornithine (ORN) to produce L-citrulline. (rcsb.org)
Ornithine can also be converted into other amino acids, such as citrulline, proline, and glutamate, as well as creatine, an important muscular energy source. (iherb.com)
Ornithine is synthesized from Arginine and is a precursor of citrulline, proline and glutamic acid. (a1supplements.com)
L-ornithine serves as the precursor for various other important compounds such as glutamic acid, proline and citrulline. (xtend-life.com)
Together with arginine and citrulline, ornithine is one of three amino acids that play a key role in the urea cycle. (hgh.com)

Individuals with ornithine translocase deficiency often cannot tolerate high-protein foods, such as meat. (medlineplus.gov)
The SLC25A15 gene provides instructions for making a protein called mitochondrial ornithine transporter 1. (medlineplus.gov)
the energy-producing centers in cells), where the protein transports a molecule called ornithine so it can participate in the urea cycle. (medlineplus.gov)
Another version of the mitochondrial ornithine transporter protein is produced by a different gene. (medlineplus.gov)
While this protein is not as abundant as mitochondrial ornithine transporter 1, it is thought that this other version of the protein may partially compensate for the loss of mitochondrial ornithine transporter 1 and contribute to the late age of onset and mild signs and symptoms in some affected individuals. (medlineplus.gov)
Ornithine ketoglutarate might change the way amino acids, the building blocks of protein, are used in the body. (webmd.com)
2007) In vitro demonstration of intra‐locus compensation using the ornithine transcarbamylase protein as model. (els.net)
L-Ornithine has a similar structure and function to L-Arginine, L-Ornithine, a non-essential amino acid, is used to make protein. (fredmeyer.com)
Provided below are ELISA kits targeting ornithine decarboxylase antizyme 1, a human protein encoded by OAZ1. (biocompare.com)
We offer Ornithine Carbamoyltransferase Peptides and Ornithine Carbamoyltransferase Proteins for use in common research applications: Blocking/Neutralizing, Control, ELISA, Protein Array, SDS-Page, Western Blot. (novusbio.com)
Each Ornithine Carbamoyltransferase Peptide and Ornithine Carbamoyltransferase Protein is fully covered by our Guarantee+, to give you complete peace of mind and the support when you need it. (novusbio.com)
Ornithine is a fitness amino acid that supports healthy protein metabolism. (nowfoods.com)
L-arginin je sou st protein , kter podporuj tvorbu a udr en svalov hmoty. (ronnie.cz)
This protein is needed to move a molecule called ornithine within the mitochondria (the energy-producing centers in cells). (wikidoc.org)
Specifically, this protein transports ornithine across the inner membrane of mitochondria to the region called the mitochondrial matrix, where it participates in the urea cycle. (wikidoc.org)
Additionally we are shipping Ornithine Decarboxylase 1 Antibodies (211) and Ornithine Decarboxylase 1 Proteins (23) and many more products for this protein. (antibodies-online.com)
Animal protein is the best dietary source of L-ornithine, like other amino acids. (xtend-life.com)

Solgar® L-Ornithine 500 mg Vegetable Capsules contains the amino acid Ornithine, which influences growth hormones and is necessary for proper immune and liver function. (bodykind.com)

Amino acid supplements, including L -ornithine, are frequently marketed to bodybuilders and weightlifters with claims for increasing levels of human growth hormone (HGH), muscle mass and strength. (wikipedia.org)
Arginine and ornithine supplements can be used to boost your levels of these amino acids, but the metabolism of these amino acids can put strain on your kidneys. (livestrong.com)
Talk to your doctor before taking arginine and ornithine supplements. (livestrong.com)
According to a 2005 article in the 'International Journal of Sports Medicine,' people may take ornithine and arginine supplements because these two amino acids are important for synthesizing human growth hormone. (livestrong.com)
L-ornithine is often prepared for use in health supplements as L-ornithine HCL, which is the hydrochloride salt of L-ornithine. (xtend-life.com)
The primary use of L-ornithine in health supplements is to support athletic performance. (xtend-life.com)
Early research shows that oral supplements containing L-ornithine can support athletic performance, including strength, power and speed. (xtend-life.com)
Due to to its ability to attenuate fatigue and boost nitric oxide, ornithine may be well stacked with pre-workout supplements. (mrsupplement.com.au)
L-ornithine is found in some food sources as well as in health and bodybuilding supplements such as HGH 30,000 Nanograms pills and HGF MAX. (hgh.com)
L-ornithine may also be consumed in natural dietary supplements. (hgh.com)
Because of its ability to boost HGH production and reduce fatigue, L-ornithine supplements are often taken to improve athletic performance, enhance muscle growth and increase endurance. (hgh.com)
As with any medication or health supplement, it is best to consult your physician before taking dietary supplements containing L-ornithine. (hgh.com)
Japanese researchers also tested the effects of L-ornithine on salivary cortisol, mood and feelings of fatigue the morning after alcohol consumption, and found that L-ornithine supplements lowered cortisol levels, increased sleep length and significantly decreased feelings of fatigue, anger/hostility and confusion. (hgh.com)

Your search returned 43 ornithine decarboxylase antizyme 1 ELISA Kit across 8 suppliers. (biocompare.com)

Affected infants show signs and symptoms of ornithine translocase deficiency within days after birth. (medlineplus.gov)
In most affected individuals, however, signs and symptoms of ornithine translocase deficiency do not appear until later in life, with health problems first appearing anytime from childhood to adulthood. (medlineplus.gov)
While the signs and symptoms of ornithine translocase deficiency can vary greatly among affected individuals, proper treatment can prevent some complications from occurring and may improve quality of life. (medlineplus.gov)
In most affected individuals, signs and symptoms of ornithine translocase deficiency do not appear until later in life. (wikidoc.org)

Ornithine transcarbamylase (OTC) deficiency is the most common urea cycle disorder. (medscape.com)
Ornithine transcarbamylase deficiency, the most common urea cycle disorder, is an X‐linked trait displaying large heterogeneity, including cases of symptomatic heterozygotes and very mild hemizygous individuals. (els.net)

Mutations in the SLC25A15 gene cause ornithine translocase deficiency. (medlineplus.gov)

Don't confuse ornithine ketoglutarate with ornithine or another chemical called L-ornithine-L-aspartate (LOLA). (webmd.com)
Don't confuse ornithine ketoglutarate with ornithine. (medicinenet.com)

This product contains hydrochloride, the acid normally present in the stomach, which acts to stabilize the L-Ornithine. (iherb.com)
This study aimed to examine the effect of L-ornithine hydrochloride ingestion on serum growth hormone secretion response after strength training in young men who did not regularly engage in high intensity exercise. (scirp.org)
Serum growth hormone and ornithine levels were measured before L-ornithine hydrochloride or placebo ingestions and at 30 minutes after strength training. (scirp.org)
A change magnitude of serum growth hormone was significantly larger in the L-ornithine hydrochloride condition than in the placebo condition, and the effect size was also large (t = 1.91, p = .044, ES = .75). (scirp.org)
A significant interaction (F = 280.98, p = 0.000, ηp2 = 0.96) was found in serum ornithine and a multiple comparison test showed that it was greater in the L-ornithine hydrochloride condition. (scirp.org)
Serum growth hormone level after strength training increases by L-ornithine hydrochloride ingestion in untrained young males. (scirp.org)

Ornithine translocase deficiency varies widely in its severity and age of onset. (medlineplus.gov)
Later-onset forms of ornithine translocase deficiency are usually less severe than the infantile form. (medlineplus.gov)
Infants with ornithine translocase deficiency may lack energy (be lethargic), refuse to eat, vomit frequently, or have poorly controlled breathing or body temperature. (medlineplus.gov)
Some people with later-onset ornithine translocase deficiency have episodes of vomiting, lethargy, problems with coordination (ataxia), vision problems, episodes of brain dysfunction (encephalopathy), developmental delay, learning disabilities, or stiffness caused by abnormal tensing of the muscles (spasticity). (medlineplus.gov)
Ornithine translocase deficiency is a very rare disorder. (medlineplus.gov)
Other factors, many unknown, also contribute to the variable severity of ornithine translocase deficiency. (medlineplus.gov)
Because ornithine translocase deficiency is caused by problems with the urea cycle, it belongs to a class of genetic diseases called urea cycle disorders. (medlineplus.gov)
A disorder is associated with ornithine translocase deficiency , and a form of hyperammonemia . (thefullwiki.org)
Complications of ornithine translocase deficiency may include developmental delay, learning disabilities, and stiffness caused by abnormal tensing of the muscles (spasticity). (wikidoc.org)
Ornithine translocase deficiency has an autosomal recessive pattern of inheritance. (wikidoc.org)
Ornithine translocase deficiency belongs to a class of metabolic disorders referred to as urea cycle disorders . (wikidoc.org)

Ornithine is not directly incorporated into proteins and enzymes and does not have a codon in the genetic code. (fsu.edu)
Our Ornithine Carbamoyltransferase Peptides and Ornithine Carbamoyltransferase Proteins can be used in a variety of model species: Human. (novusbio.com)
Choose from our Ornithine Carbamoyltransferase Peptides and Proteins. (novusbio.com)
Finally, we demonstrate that functional proteins may arise from short and simple sequences that include ornithine, an amino acid likely present in early proteins yet absent in modern proteins. (pnas.org)
Here we asked whether a primordial function, such as nucleic acid binding, could emerge with ornithine, a basic amino acid that forms abiotically yet is absent in modern-day proteins. (pnas.org)
Intermediates along this trajectory comprise sequence-duplicated functional proteins built from 10 amino acid types, with ornithine as the only basic amino acid. (pnas.org)
Ornithine is an amino acid, but not one that is used to create proteins. (mrsupplement.com.au)
Ornithine is a non-essential amino acid not found in proteins. (encognitive.com)

A 1993 short 4-day clinical study reported that L-ornithine incombination with L-arginine and L-lysine at 2 g/d each did not increase HGH. (wikipedia.org)
Poupon, E., Salame, R. and Yan, L.-H. (2011) Biomimetic Synthesis of Ornithine/Arginine and Lysine-Derived Alkaloids: Selected Examples, in Biomimetic Organic Synthesis (eds E. Poupon and B. Nay), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, Germany. (wiley.com)
Lysine, an antagonist of Arginine, also prevents uptake of Ornithine. (encognitive.com)

Ornithine aminotransferase forms the initial intermediate in this process. (wikidoc.org)
Deficiency of OAT activities causes ornithine aminotransferase deficiency , also known as gyrate atrophy of choroid and retina. (wikidoc.org)

Ornithine, via the action of ornithine decarboxylase (E.C. 4.1.1.17), is the starting point for the synthesis of polyamines such as putrescine . (wikipedia.org)
putrescine from L-ornithine: step 1/1. (abcam.com)

Now L-Ornithine (500mg) 120 caps is a Ornithine dietary supplement. (astronutrition.com)
Now Arginine & Ornithine - 500mg L-Arginine & 250mg L-Ornithine Per Capsule! (a1supplements.com)

L -Ornithine L -aspartate (LOLA), a stable salt of ornithine and aspartic acid, has been used in the treatment of cirrhosis . (wikipedia.org)
What is the role of L-ornithine L-aspartate (LOLA) in the treatment of hepatic encephalopathy (HE)? (medscape.com)

Giving ornithine ketoglutarate intravenously (by IV) does not help treat mental changes caused by liver disease. (webmd.com)
Ornithine transcarbamylase (OTC) deficiency is an X-linked recessive disorder that leads to hyperammonemia and liver damage. (hindawi.com)
A 21-year-old woman with ornithine transcarbamylase (OTC) deficiency presented for liver transplant. (hindawi.com)
Immunohistochemistry: Ornithine Carbamoyltransferase Antibody [NBP1-88121] - Staining of human liver shows moderate cytoplasmic positivity in hepatocytes. (novusbio.com)
Common signs of an L-ornithine deficiency primarily include chronic problems with liver function. (xtend-life.com)
Various hormonal and non-hormonal agents were tested for their ability to induce ornithine decarboxylase (EC 4.1.1.17) in primary cultures of fetal rat liver cells that retain many of the differentiated functions of hepatocytes. (nih.gov)
These observations are in contrast to the wide range of hormones, e.g. insulin, hydrocortisone, glucagon and growth hormone, than can induce ornithine decarboxylase in vivo in the adult rat liver but which are all without effect on fetal rat liver cells. (nih.gov)
through this process, ornithine is metabolized back into arginine by the liver. (hgh.com)

The OAT involved in the ultimate formation of the non-essential amino acid proline from the amino acid ornithine . (wikidoc.org)

Mutations in the SLC25A15 gene cause the production of a mitochondrial ornithine transporter 1 with reduced or absent function. (medlineplus.gov)
Mutations in the SLC25A15 gene result in a mitochondrial ornithine transporter that is unstable or the wrong shape, and which cannot bring ornithine to the mitochondrial matrix. (wikidoc.org)

Ornithine translocase is responsible for transporting ornithine from the cytosol into the mitochondria in the urea cycle . (thefullwiki.org)

Ornithine and glutamine are thought to have anabolic effects, meaning that they stimulate the body to build muscle and other tissues. (memorialhealth.com)
ornithine and glutamine appear to block the effect of hormones that break down muscle and other tissues (catabolic hormones). (memorialhealth.com)
Because it is simply ornithine and glutamine, OKG is presumably safe. (memorialhealth.com)

Findings suggest that targeting ornithine decarboxylase 1 (ODC1 ) could be an attractive option for molecular therapy of hepatocellular carcinoma ( HCC ). (antibodies-online.com)

The ornithine-urea cycle (OUC) belongs to the cornerstone of the metabolism of metazoans and, as found recently, also photosynthetic stramenopiles. (jcvi.org)

It catalyzes the reverse reaction as well, and is therefore essential in creating ornithine from the starting substrate proline. (wikidoc.org)

Ornithine ketoglutarate is taken by mouth to build muscle and increase muscle strength. (webmd.com)
Ornithine ketoglutarate is sometimes included in nutritional formulas that healthcare providers give as an injection into the veins (intravenously, by IV). (webmd.com)
Ornithine ketoglutarate is added to the formulas to prevent abnormally slow growth in children who are receiving long-term intravenous feeding. (webmd.com)
Taking ornithine ketoglutarate by mouth might improve wound healing in people with burns. (webmd.com)
Taking ornithine ketoglutarate before plastic surgery or after surgery for throat cancer improves healing time and reduces complications such as the number of infections. (webmd.com)
Early research suggests that giving ornithine ketoglutarate intravenously (by IV) before and during chemotherapy can reduce the severity of nausea and vomiting similarly to the drug metoclopramide. (webmd.com)
Some early research suggests that ornithine ketoglutarate helps prevent abnormally slow growth when added to long-term nutrition that is given to children intravenously (by IV). (webmd.com)
However, other research suggests that taking ornithine ketoglutarate for one year does not improve growth in short-statured children. (webmd.com)
Early research suggests that taking ornithine ketoglutarate by mouth for 12 weeks does not improve immune function, strength, or body weight in people with HIV. (webmd.com)
Taking ornithine ketoglutarate by mouth for 6 weeks seems to improve healing in older people with heel pressure ulcers that are no larger than 8 cm2 at the start of treatment. (webmd.com)
Early research suggests that giving ornithine ketoglutarate intravenously (by IV) for 5 days to people who have had a stroke might improve their ability to respond to stimuli. (webmd.com)
However, this improvement does not appear to continue once treatment with ornithine ketoglutarate is stopped. (webmd.com)
Early research suggests that ornithine ketoglutarate might improve the regrowth of certain muscles after surgery. (webmd.com)
More evidence is needed to rate the effectiveness of ornithine ketoglutarate for these uses. (webmd.com)
Ornithine ketoglutarate is POSSIBLY SAFE in children and adults when given intravenously or in adults when taken by mouth with appropriate medical supervision. (webmd.com)
What other names is Ornithine Ketoglutarate known by? (medicinenet.com)
What is Ornithine Ketoglutarate? (medicinenet.com)
Ornithine ketoglutarate is an amino acid. (medicinenet.com)
Ornithine ketoglutarate can be made by the body or in a laboratory. (medicinenet.com)
Ornithine ketoglutarate is taken by mouth for enhancing athletic performance and for healing wounds in burn patients. (medicinenet.com)
Taking ornithine ketoglutarate does not seem to improve athletic performance. (medicinenet.com)
How does Ornithine Ketoglutarate work? (medicinenet.com)
Not enough is known about the use of ornithine ketoglutarate during pregnancy and breast-feeding. (medicinenet.com)
Taking ornithine ketoglutarate might make this condition worse. (medicinenet.com)
Dosing considerations for Ornithine Ketoglutarate. (medicinenet.com)
For the healing of burn wounds: 30 grams of ornithine ketoglutarate daily. (medicinenet.com)
Warning: If you are pregnant or breastfeeding, consult your health care professional before using OKG Ornithine Ketoglutarate product. (vitasprings.com)
VitaSprings does not imply any medical claims from the customer reviews on this OKG Ornithine Ketoglutarate Powder product on this website. (vitasprings.com)
Write a Review on this OKG Ornithine Ketoglutarate Powder product and share your experience or opinion with other customers. (vitasprings.com)
Buy OKG Ornithine Ketoglutarate Powder from Source Naturals at VitaSprings, and we guarantee you a safe, secure online shopping experience! (vitasprings.com)

α-2-(Difluoromethyl)-dl-ornithine (DFMO), an irreversible inhibitor of ornithine decarboxylase, has been shown to suppress skin carcinogenesis in murine models after oral or topical administration. (aacrjournals.org)
The Ornithine Decarboxylase Inhibitor, POB controls the biological activity of Ornithine Decarboxylase. (emdmillipore.com)

Presence of OTCase enzymatic activity in an arg3 strain expressing wild-type precursor was utilized to obtain selective growth in a medium devoid of arginine but supplemented with the OTCase substrate ornithine. (pnas.org)

m-Chloroperoxybenzoic acid (CPBA) was tested for its ability to induce the ornithine decarboxylase (ODC) marker of skin tumor promotion. (usda.gov)

Ornithine decarboxylase (ODC ) plays a key role in prostate tumorigenesis and that the polyamine pathway is altered as early as high-grade prostate intraepithelial neoplasia (HGPIN). (antibodies-online.com)

The responsive type showed the in vivo reduction of serum ornithine level after oral vitamin B 6 and the OKT activity increased by high concentration of pyridoxal phosphate. (springer.com)

NOW Arginine & Ornithine combines these two essential aminos into one impressive formula. (illpumpyouup.com)
This popular combination promotes nitric oxide production, supports hormonal balance, and promotes muscle mass - maybe it's time you added a bottle to your program - Arginine & Ornithine! (illpumpyouup.com)
NOW Arginine & Ornithine is formulated with two essential amino acids to help support an active lifestyle. (tasmanhealth.co.nz)

We offer Ornithine Carbamoyltransferase Antibodies for use in common research applications: Immunocytochemistry/Immunofluorescence, Immunohistochemistry, Immunohistochemistry-Paraffin, Simple Western, Western Blot. (novusbio.com)
Our Ornithine Carbamoyltransferase Antibodies can be used in a variety of model species: Human, Mouse. (novusbio.com)

Complications from ornithine transcarbamylase deficiency may include developmental delay and intellectual disability. (medlineplus.gov)

1984) Human ornithine transcarbamylase locus mapped to band Xp21.1 near to Duchenne muscular dystrophy locus. (els.net)

Choose from our Ornithine Carbamoyltransferase polyclonal antibodies and browse our Ornithine Carbamoyltransferase monoclonal antibody catalog. (novusbio.com)

The purpose of this study is to determine whether ornithine phenylacetate can speed recovery from an acute hepatic encephalopathy episode requiring hospitalization in cirrhotic patients. (clinicaltrials.gov)

One study evaluated a combined arginine and ornithine supplement and found some evidence of benefit. (memorialhealth.com)
Arginine and Ornithine combines two essential amino acids into one optimal supplement. (a1supplements.com)

L -Ornithine supplementation attenuated fatigue in subjects in a placebo-controlled study using a cycle ergometer. (wikipedia.org)
supplementation with ornithine can attenuate this. (mrsupplement.com.au)

Ornithine is a non-proteinogenic amino acid that plays a role in the urea cycle . (wikipedia.org)
Ornithine is not an amino acid coded for by DNA , that is, not proteinogenic . (wikipedia.org)
Ornithine is a non-essential amino acid that contributes mainly to supporting the process of the urea cycle. (astronutrition.com)
L-ornithine is an amino acid that is primarily used in the urea cycle, which eliminates excess nitrogen from the body. (xtend-life.com)
E. coli in the intestines also synthesizes L-ornithine from the amino acid L-glutamate. (xtend-life.com)
Also, the amino acid arginine would induce ornithine decarboxylase in this cell type following arginine starvation for 24 h. (nih.gov)
Ornithine is produced within the body, from dietary sources of the essential amino acid l-arginine. (mrsupplement.com.au)
Ornithine can be bought as a stand alone amino acid, or is found in many pre and intra workouts and other nitric oxide boosters. (mrsupplement.com.au)
Kyowa Hakko USA has announced it has completed GRAS (Generally Recognized As Safe) self-affirmation for the valuable amino acid L-Ornithine. (kyowa-usa.com)
L-Ornithine is an essential amino acid that may enhance the production of growth hormone which promotes muscle building activity in the body. (bodykind.com)
ʟ-Ornithine is an important amino acid with broad applications in pharmaceutical and food industries. (springer.com)
NOW® L-Ornithine is an amino acid that has been used by fitness enthusiasts for years. (totaldiscountvitamins.com)
Ornithine - also known as L-ornithine, (S)-2,5-diaminopentanoic acid or (S)-alpha,delta-diaminovaleric acid - is a crystalline amino acid. (hgh.com)
The human body manufactures ornithine from the amino acid arginine as part of the urea cycle. (hgh.com)

Another nitrogen is added from aspartate , producing the denitrogenated fumarate , and the resulting arginine (a guanidinium compound) is hydrolysed back to ornithine, producing urea. (wikipedia.org)
Both l-ornithine and l-aspartate are substrates for glutamate transaminase. (medscape.com)
An aspartate salt of L-ornithine. (kyowa-usa.com)

Anatomy4

Organisms6

Diseases9

Chemicals and Drugs55

Analytical, Diagnostic and Therapeutic Techniques and Equipment1

Phenomena and Processes10

Information Science3

Molecular enzymology of mammalian Delta1-pyrroline-5-carboxylate synthase. Alternative splice donor utilization generates isoforms with different sensitivity to ornithine inhibition. (1/1042)

Car: a cytoplasmic sensor responsible for arginine chemotaxis in the archaeon Halobacterium salinarum. (2/1042)

Effect of ornithine and lactate on urea synthesis in isolated hepatocytes. (3/1042)

Arginine biosynthesis in Neisseria gonorrhoeae: enzymes catalyzing the formation of ornithine and citrulline. (4/1042)

Proline biosynthesis from L-ornithine in Clostridium sticklandii: purification of delta1-pyrroline-5-carboxylate reductase, and sequence and expression of the encoding gene, proC. (5/1042)

Role of ornithine in the N-acetylglutamate turnover in the liver of rats. (6/1042)

Expression of Escherichia coli K-12 arginine genes in Pseudomonas fluorescens. (7/1042)

The carbamoyl-phosphate synthetase of Pyrococcus furiosus is enzymologically and structurally a carbamate kinase. (8/1042)

Ornithine

Ornithine Decarboxylase

Ornithine Carbamoyltransferase

Ornithine-Oxo-Acid Transaminase

Ornithine Carbamoyltransferase Deficiency Disease

Eflornithine

Putrescine

Carboxy-Lyases

Spermidine

Citrulline

Arginine

Adenosylmethionine Decarboxylase

Biogenic Polyamines

Spermine

Gyrate Atrophy

Arginase

Diamines

Carbamyl Phosphate

Transaminases

Enzyme Induction

Carbamoyl-Phosphate Synthase (Ammonia)

Hyperammonemia

Uveal Diseases

Urea

Proline

Decarboxylation

Kinetics

Ammonia-Lyases

Ammonia

Amino Acids

Mitoguazone

Cadaverine

Liver

Amino Acid Metabolism, Inborn Errors

Orotic Acid

Amino Acid Transport Systems, Basic

Molecular Sequence Data

Agmatine

Urea Cycle Disorders, Inborn

Amino-Acid N-Acetyltransferase

Glutamine

Cyclohexylamines

RNA, Messenger

Argininosuccinate Synthase

Spermidine Synthase

Lysine

Cycloheximide

Neurospora

Argininosuccinate Lyase

Mitochondria, Liver

Ureohydrolases

Gene Expression Regulation, Enzymologic

Homoarginine

Selenomonas

Acetyltransferases

Phosphotransferases (Carboxyl Group Acceptor)

Carboxyl and Carbamoyl Transferases

Amino Acid Sequence

1-Pyrroline-5-Carboxylate Dehydrogenase

Hyperargininemia

Rats, Inbred Strains

Phorbols

Base Sequence

Pyridoxal Phosphate

Thioacetamide

DNA

Protein Biosynthesis

Leukemia L1210

Mutation

Tetradecanoylphorbol Acetate

Carbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing)

Papilloma

Glutamates

Escherichia coli

Neurospora crassa

Cloning, Molecular

Cell Line

Enzyme Repression

Spermine Synthase

Cell Division