We investigated the possibility of eliciting a measurable photoinduced electrical current from the cyanobacterium Agmenellum quadruplicatum PR-6 ( SynechococcusPCC 7002). This proved virtually...
Gloeobacter violaceus sp. PCC 7421 is an unusual cyanobacterium with only one cellular membrane, which lacks the thylakoid membranes found in other oxygenic photosynthetic organisms. The cell membrane lipids in G. violaceus sp. PCC 7421 are monogalactosyl diacylglycerol, digalactosyl diacylglycerol, phosphatidyl glycerol and phosphatidic acid in the molar proportion of 51, 24, 18 and 4% respectively. This lipid composition resembles that of the cell membrane from other cyanobacteria, but completely lacks sulfoquinovosyl diacylglycerol. This lack of sulfoquinovosyl diacylglycerol is exceptional for a photosynthetic membrane. The membrane lipids are esterified to 14:0, 16:0, 16:1, 18:0, 18:1, 18:2 and alpha 18:3 fatty acids.. ...
Cloning, solubilization, and purification of SQS.Eukaryotic SQSs are associated with microsomes and can be solubilized with detergents. However, when expressed in E. coli, SQS is found in inclusion bodies and cannot be reconstituted to give soluble active enzyme. Zhang et al. discovered that soluble recombinant yeast SQS could be obtained by deletion of a putative C-terminal membrane-spanning α-helix (57). This approach has been used to obtain soluble recombinant enzyme from other eukaryotes (1, 18, 45, 47, 52). However, bacterial SQSs do not have a C-terminal sequence predicted to give a membrane-spanning helix, and the basis for membrane affiliation by the bacterial enzymes is not apparent.. Three bacteria, T. elongatus BP-1, B. japonicum, and Z. mobilis, were selected as sources for the SQS gene. Previously, SQ synthesis was detected in E. coli transformants harboring the hopane gene cluster from B. japonicum and Z. mobilis (34). In addition, a SQ-hopane cyclase from B. japonicum and Z. ...
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1MY6: The 1.6 A resolution structure of Fe-superoxide dismutase from the thermophilic cyanobacterium Thermosynechococcus elongatus.
A strain of the filamentous non N-fixing cyanobacterium Phormidium sp. isolated from the Messolonghi (W. Greece) saltworks, was cultured in the laboratory at 6 different combinations of salinity (20-40-60 ppt) and illumination (low-2000 lux and high-8000 lux). At salinities of 60 and 40 ppt and in high illumination (XL-8000 lux) the growth rate (μmax) presented the highest values (0.491 and 0.401 respectively) compared to the corresponding at 20 ppt (0.203). In general and at all salinities, the higher illumination (XL) gave the highest growth rates and shorter dublication time (tg) in comparison to the lower illumination (L). On the contrary, phycocyanin, phycoerythrin and allophycocyanin production was extremely increased in the lower illumination (L) in all salinities, from ~14fold at 40 and 60 ppt to 269fold at 20 ppt of those corresponding to higher illumination (XL). Similar analogies were also recorded for the other two billiproteins. Chlorophyll-a content was also higher in lower illumination
Synechococcus sp. PCC 7002 is known to be tolerant to most of the environmental factors in natural habitats of Cyanobacteria. Gene expression can be easily studied in this cyanobacterium, as its complete genome sequence is available. These properties make Synechococcus sp. PCC 7002 an appropriate model organism for biotechnological applications. To study the gene expression in Cyanobacteria, real-time quantitative PCR (qPCR) can be used, but as this is a highly sensitive method, data standardization is indicated between samples. The most commonly used strategy is normalization against internal reference genes. Synechococcus sp. PCC 7002 has not yet been evaluated for the best reference genes. In this work, six candidate genes were analyzed for this purpose. Cyanobacterial cultures were exposed to several stress conditions, and three different algorithms were used for ranking the reference genes: geNorm, NormFinder, and BestKeeper. Moreover, gene expression stability value M and single-control ...
1I7Y: Structure of c-phycocyanin from the thermophilic cyanobacterium Synechococcus vulcanus at 2.5 A: structural implications for thermal stability in phycobilisome assembly.
Cyanobacteria are an ancient group of photosynthetic prokaryotes, which are significant in biogeochemical cycles. The most primitive among living cyanobacteria, Gloeobacter violaceus, shows a unique ancestral cell organization with a complete absence of inner membranes (thylakoids) and an uncommon structure of the photosynthetic apparatus. Numerous phylogenetic papers proved its basal position among all of the organisms and organelles capable of plant-like photosynthesis (i.e., cyanobacteria, chloroplasts of algae and plants). Hence, G. violaceus has become one of the key species in evolutionary study of photosynthetic life. It also numbers among the most widely used organisms in experimental photosynthesis research. Except for a few related culture isolates, there has been little data on the actual biology of Gloeobacter, being relegated to an evolutionary curiosity with an enigmatic identity. Here we show that members of the genus Gloeobacter probably are common rock-dwelling cyanobacteria. On the
The study of the primary metabolism of cyanobacteria in response to light conditions is important for environmental biology because cyanobacteria are widely distributed among various ecological niches. Cyanobacteria uniquely possess circadian rhythms, with central oscillators consisting from three proteins, KaiA, KaiB, and KaiC. The two-component histidine kinase SasA/Hik8 and response regulator RpaA transduce the circadian signal from KaiABC to control gene expression. Here, we generated a strain overexpressing rpaA in a unicellular cyanobacterium Synechocystis sp. PCC 6803. The rpaA-overexpressing strain showed pleiotropic phenotypes, including slower growth, aberrant degradation of an RNA polymerase sigma factor SigE after the light-to-dark transition, and higher accumulation of sugar catabolic enzyme transcripts under dark conditions. Metabolome analysis revealed delayed glycogen degradation, decreased sugar phosphates and organic acids in the tricarboxylic acid cycle, and increased amino acids
a.Gram-positive bacteria have a single cell wall formed from peptidoglycan. Anabaena, genus of nitrogen-fixing blue-green algae with beadlike or barrel-like cells and interspersed enlarged spores (heterocysts), found as plankton in shallow water and on moist soil. Gloeobacter violaceus is a rod-shape unicellular cyanobacterium that has been isolated from calcareous rocks in Switzerland [3]. A. bacteria and fungi ... D. bacteria and archaea. Thats right most cyanobacteria are gram negative. This makes them easy to identify. Cyanobacteria are the prokaryotic and gram-negative bacteria. into both cell halves, which in many bacteria is achieved by an active machinery that operates during DNA replication. Humans use of prokaryotes : This is a microscopic image of Bacillus subtilis (ATCC 6633) with a gram staining of magnification: 1,000. Cyanobacteria are among the easiest microfossils to recognize. During each cell cycle, chromosomes must be separated into future daughter cells, i.e. ... ...
Marine cyanobacteria have been considered a rich source of secondary metabolites with potential biotechnological applications, namely in the pharmacological field. Chemically diverse compounds were found to induce cytoxicity, anti-inflammatory and antibacterial activities. The potential of marine cyanobacteria as anticancer agents has however been the most explored and, besides cytotoxicity in tumor cell lines, several compounds have emerged as templates for the development of new anticancer drugs. The mechanisms implicated in the cytotoxicity of marine cyanobacteria compounds in tumor cell lines are still largely overlooked but several studies point to an implication in apoptosis. This association has been related to several apoptotic indicators such as cell cycle arrest, mitochondrial dysfunctions and oxidative damage, alterations in caspase cascade, alterations in specific proteins levels and alterations in the membrane sodium dynamics. In the present paper a compilation of the described marine
Cyanobacteria, also known as blue-green algae, blue-green bacteria or cyanophyta, is a phylum of bacteria that obtain their energy through photosynthesis. They are a significant component of the marine nitrogen cycle and an important primary producer in many areas of the ocean, but are also found in habitats other than the marine environment; in particular, cyanobacteria are known to occur in both freshwater and hypersaline inland lakes. They are found in almost every conceivable environment, from oceans to fresh water to bare rock to soil. Cyanobacteria are the only group of organisms that are able to reduce nitrogen and carbon in aerobic conditions, a fact that may be responsible for their evolutionary and ecological success. Certain cyanobacteria also produce cyanotoxins. This new book presents a broad variety of international research on this important organism ...
Cyanobacteria are a taxon of bacteria which conduct photosynthesis. They are not algae, though they were once called blue-green algae. It is a phylum of bacteria, with about 1500 species. In endosymbiont theory, chloroplasts (plastids) are descended from cyanobacteria. Their DNA profile is evidence for this.[3][4][5]. Cyanobacteria have an extremely long fossil record, starting at least 3,500 million years ago. They were the main organisms in the stromatolites of the Archaean and Proterozoic eons.[6]. The ability of cyanobacteria to perform oxygenic photosynthesis is highly significant. The early atmosphere on Earth was largely reducing, that is, without oxygen. The cyanobacteria in stromatolites were the first known organisms to photosynthesise and produce free oxygen. After about a billion years, the effect of this photosynthesis began a huge change in the atmosphere. The process, called the Great Oxygenation Event, took a long time. Eventually, it killed off most of the organisms which could ...
Plectonema boryanum bacteriophage LPP-2 ATCC ® 18200-B2™ Designation: LPP-2, strain SPI TypeStrain=False Application: Characterization
Mass populations of toxic cyanobacteria in recreational waters can present a serious risk to human health. Intelligence on the abundance and distribution of cyanobacteria is therefore needed to aid risk assessment and management activities. In this paper, we use data from the Compact Airborne Spectrographic Imager-2 (CASI-2) to monitor seasonal change in the concentration of chlorophyll a (Chl a) and the cyanobacterial biomarker pigment C-phycocyanin (C-PC) in a series of shallow lakes in the UK. The World Health Organization guidance levels for cyanobacteria in recreational waters were subsequently used to build a decision tree classification model for cyanobacterial risk assessment which was driven using Chl a and C-PC products derived from the CASI-2 data. The results demonstrate that remote sensing can be used to acquire intelligence on the distribution and abundance of cyanobacteria in inland waterbodies. It is argued the use of remote sensing reconnaissance, in conjunction with in situ ...
Understanding the evolution of the free-living, cyanobacterial, diazotroph Trichodesmium is of great importance due to its critical role in oceanic biogeochemistry and primary production. Unlike the other ,150 available genomes of free-living cyanobacteria, only 63.8% of the Trichodesmium erythraeum (strain IMS101) genome is predicted to encode protein, which is 20-25% less than the average for other cyanobacteria and non-pathogenic, free-living bacteria. We use distinctive isolates and metagenomic data to show that low coding density observed in IMS101 is a common feature of the Trichodesmium genus both in culture and in situ. Transcriptome analysis indicates that 86% of the non-coding space is expressed, although the function of these transcripts is unclear. The density of noncoding, possible regulatory elements predicted in Trichodesmium, when normalized per intergenic kilobase, was comparable and two fold higher than that found in the gene dense genomes of the sympatric cyanobacterial genera ...
Scientists know a group of cyanobacteria Trichodesmium capable of fixing atmospheric Nitrogen N2 that is dissolved in water to produce proteins. These cyanobacteria can then live in poor nutrients conditions. A lot of these cyanobacteria can be found in Pacific ocean.. ...
In photosynthetic organisms, carbon fixation must be coordinated with the light harvesting reactions to prevent unnecessary energy expenditure in the absence of light. The enzyme phosphoribulokinase (PRK) produces the substrate for the carbon fixation step and switches off reversibly by disulfide bond formation. How this works in β-cyanobacteria is reported in a recent article in Acta Cryst. F by Wilson et al. (2019) and the Proteopedia molecular tour accompanying the article.. The paper describes the dimeric structure of PRK from the cyanobacterium Synechococcus PCC6301. This enzyme catalyzes the transfer of a second phosphate group onto ribulose 5-phosphate, thus creating the ribulose-1,5-bisphosphate (RuBP) substrate for ribulose 1,5-bisphosphate carboxylase/oxygenase (RuBisCO). The need for RuBP is found in virtually all autotrophic organisms, and there are corresponding PRKs in all kingdoms. Phylogenetic analyses of PRKs show two broad classes of enzymes, prokaryotic homo-octameric systems ...
Cyanobacteria are the only prokaryotes with the ability to conduct oxygenic photosynthesis, therefore having major influence on the evolution of life on earth. Their diverse morphology was traditionally the basis for taxonomy and classification. For example, the genus Chroococcidiopsis has been classified within the order Pleurocapsales, based on a unique reproduction modus by baeocytes. Recent phylogenetic results suggested a closer relationship of this genus to the order Nostocales. However, these studies were based mostly on the highly conserved 16S rRNA and a small selection of Chroococcidiopsis strains. One aim of this present thesis was to investigate the evolutionary relationships of the genus Chroococcidiopsis, the Pleurocapsales and remaining cyanobacteria using 16S rRNA, rpoC1 and gyrB gene. Including the single gene, as the multigene analyses of 97 strains clearly showed a separation of the genus Chroococcidiopsis from the Pleurocapsales. Furthermore, a sister relationship between the ...
Cyanobacteria are of cyan color, which is a turquoise blue color, and they are also referred to as blue, green algae. The green algae are green in color. Cyanobacteria are referred to as prokaryotic organisms, while the green algae are referred to as eukaryotic organisms. Cyanobacteria have the ability to photosynthesize, which means they can produce their food by themselves with the help of sunlight. Cyanobacteria release a kind of toxin that is dangerous to some aquatic organisms, such as - ProProfs Discuss
Risks for Blue-green algae toxicity, Blue-green algae toxicity treatments, recommended products for Blue-green algae toxicity, ways to prevent Blue-green algae toxicity, causes of Blue-green algae toxicity
Cyanobacteria blooms frequently disturb the functioning of freshwater ecosystems and their uses, due to the toxins dangerous to health that cyanobacteria are able to synthesize. Therefore, many countries have implemented monitoring programs aimed at reducing the risk of human exposure to these toxins. The main limitation is related to the heterogeneity of the spatial distribution of cyanobacteria. In the vertical dimension, these organisms can stay in different layers in the water column and in the horizontal scale, the cells may accumulate in some a rea of the water body, under the action of winds or currents. In an attempt to improve monitoring, many research projects have been undertaken in order to develop new tools, like buoys equipped with various underwater sensors. This tool is highly relevant but it does not allow assessing the horizontal distribution of cyanobacteria and its cost remains expensive. Moreover, if satellite remote sensing can be considered very
Randy looked up the word and found: Cyanobacteria are photosynthetic microorganisms that contain chlorophyll. Formerly considered blue-green algae, but actually closely related to bacteria, cyanobacteria are of special importance in the balance of nature. Cyanobacteria were the earliest oxygen-producing organisms on Earth (remnants of cyanobacteria have been found in fossils dating back 2.5 billion years) and were responsible for converting Earths non-oxygen atmosphere to oxygen. Cyanobacteria are found in water and soil and can tolerate great ranges in salinity and temperature. Some species of cyanobacteria convert atmospheric nitrogen to compounds of nitrogen used by plants. Other species of cyanobacteria (such as the one shown here) are grown commercially as a protein-rich human food supplement ...
Randy looked up the word and found: Cyanobacteria are photosynthetic microorganisms that contain chlorophyll. Formerly considered blue-green algae, but actually closely related to bacteria, cyanobacteria are of special importance in the balance of nature. Cyanobacteria were the earliest oxygen-producing organisms on Earth (remnants of cyanobacteria have been found in fossils dating back 2.5 billion years) and were responsible for converting Earths non-oxygen atmosphere to oxygen. Cyanobacteria are found in water and soil and can tolerate great ranges in salinity and temperature. Some species of cyanobacteria convert atmospheric nitrogen to compounds of nitrogen used by plants. Other species of cyanobacteria (such as the one shown here) are grown commercially as a protein-rich human food supplement ...
General Information: Trichodesmium erythraeum strain IMS101 was isolated from the North Carolina coast in 1992 and grows in straight filaments. Filamentous marine cyanobacterium. This filamentous marine cyanobacterium is a nitrogen-fixing organism that contribues a significant amount of the global fixed nitrogen each year. These bacteria are unusual in that nitrogen fixation takes place in a differentiated cell called the diazocyte which is different from the nitrogen-fixing differentiated cell (heterocyst) found in other cyanobacteria. The diazocyte is developed in order to protect the oxygen-sensitive nitrogenases and includes a number of changes including production of more membranes and down-regulation of photosynthetic activity during times of peak nitrogen fixation (noontime). This organism gives the Red Sea its name when large blooms appear and is one of the organisms most often associated with large blooms in marine waters. ...
General Information: Trichodesmium erythraeum strain IMS101 was isolated from the North Carolina coast in 1992 and grows in straight filaments. Filamentous marine cyanobacterium. This filamentous marine cyanobacterium is a nitrogen-fixing organism that contribues a significant amount of the global fixed nitrogen each year. These bacteria are unusual in that nitrogen fixation takes place in a differentiated cell called the diazocyte which is different from the nitrogen-fixing differentiated cell (heterocyst) found in other cyanobacteria. The diazocyte is developed in order to protect the oxygen-sensitive nitrogenases and includes a number of changes including production of more membranes and down-regulation of photosynthetic activity during times of peak nitrogen fixation (noontime). This organism gives the Red Sea its name when large blooms appear and is one of the organisms most often associated with large blooms in marine waters. ...
ID Q31KY7_SYNE7 Unreviewed; 1017 AA. AC Q31KY7; DT 06-DEC-2005, integrated into UniProtKB/TrEMBL. DT 06-DEC-2005, sequence version 1. DT 22-NOV-2017, entry version 86. DE RecName: Full=Phosphoenolpyruvate carboxylase {ECO:0000256,HAMAP-Rule:MF_00595, ECO:0000256,SAAS:SAAS00946768}; DE Short=PEPC {ECO:0000256,HAMAP-Rule:MF_00595}; DE Short=PEPCase {ECO:0000256,HAMAP-Rule:MF_00595}; DE EC=4.1.1.31 {ECO:0000256,HAMAP-Rule:MF_00595, ECO:0000256,SAAS:SAAS00946768}; GN Name=ppc {ECO:0000256,HAMAP-Rule:MF_00595}; GN OrderedLocusNames=Synpcc7942_2252 {ECO:0000313,EMBL:ABB58282.1}; OS Synechococcus elongatus (strain PCC 7942) (Anacystis nidulans R2). OC Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae; OC Synechococcus. OX NCBI_TaxID=1140 {ECO:0000313,EMBL:ABB58282.1, ECO:0000313,Proteomes:UP000002717}; RN [1] {ECO:0000313,Proteomes:UP000002717} RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=PCC 7942 {ECO:0000313,Proteomes:UP000002717}; RG US DOE Joint Genome Institute; RA Copeland ...
Article The impact of cyanobacteria on growth and death of opportunistic pathogenic bacteria. Climate change may cause increased microbial growth in water sources and more knowledge is required on how this may affect the hygienic water quality, i.e.,...
Algae Detail UTEX Number: SP37Class: CyanophyceaeStrain: Phormidium janthiphorumMedia: Soil Extract MediumOrigin: Great Salt Plains, Oklahoma, USADescription of
Hamilton, ON - July 12, 2017 - Public Health Services has confirmed the presence of toxin-producing blue-green algae (Cyanobacteria) at the Bayfront Park Boat Launch, Bayfront Park Beach, and at Pier 4 Park Beach. Observations by Public Health Services staff indicate that blue-green algae are also present along most of the western shoreline. The algae is present from the inner
Part of the Sec protein translocase complex. Interacts with the SecYEG preprotein conducting channel. SecDF uses the proton motive force (PMF) to complete protein translocation after the ATP-dependent function of SecA.
p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.,/p> ,p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.,/p> ,p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).,/p> ,p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x,sup>64,/sup> + x,sup>4,/sup> + x,sup>3,/sup> + x + 1. The algorithm is described in the ISO 3309 standard. ,/p> ,p class=publication>Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.,br /> ,strong>Cyclic redundancy and other checksums,/strong>,br /> ,a href=http://www.nrbook.com/b/bookcpdf.php>Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993),/a>),/p> Checksum:i ...
Chapter 1 - Reactive Oxygen Species in Cyanobacteria (pp. 651 3677, Santiago, Chile, Department of Ecology, Environment & Plant Sciences, Stockholm University, Lilla Frescati 106 91 Stockholm, Sweden, Indira Gandhi National Tribal University, India, Royal Netherlands Institute of Sea Research & University of Amsterdam, The Netherlands. splits water molecule to release oxygen. food source; it is high in protein, and can be cultivated in ponds quite easily. Hence, they are of great importance in aquaculture. They are one of very few groups of organisms that can convert 1-40) Paul Hsieh and … They are one of very few groups of organisms that can convert inert atmospheric nitrogen into an organic form, such as nitrate or ammonia. Though all cyanobacteria are fundamentally oxygenic photosynthetic organisms, some species can switch their metabolic mode to, for example, anoxygenic photosynthesis, using sulfide. They exhibit several types of chromatic adaptation, regulated at transcriptional and
Cyanotoxin Cyanotoxins are toxins produced by bacteria called cyanobacteria (also known as blue-green algae). Cyanobacteria are found almost everywhere, but particularly in lakes and in the ocean where, under certain conditions, they reproduce exponentially to form blooms. Blooming cyanobacteria can produce cyanotoxins in such concentrations that they poison and even kill animals and humans. Cyanotoxins can also accumulate in other animals such as fish and shellfish, and cause poisonings such as shell
In this study, we investigated forty cyanobacterial isolates from biofilms, gastropods, brackish water and symbiotic lichen habitats. Their aqueous and organic extracts were used to screen for apoptosis-inducing activity against acute myeloid leukemia cells. A total of 28 extracts showed cytotoxicity against rat acute myeloid leukemia (IPC-81) cells. The design of the screen made it possible to eliminate known toxins, such as microcystins and nodularin, or known metabolites with anti-leukemic activity, such as adenosine and its analogs. A cytotoxicity test on human embryonic kidney (HEK293T) fibroblasts indicated that 21 of the 28 extracts containing anti-acute myeloid leukemia (AML) activity showed selectivity in favor of leukemia cells. Extracts L26-O and L30-O were able to partly overcome the chemotherapy resistance induced by the oncogenic protein Bcl-2, whereas extract L1-O overcame protection from the deletion of the tumor suppressor protein p53. In conclusion, cyanobacteria are a prolific
N₂ fixation adds bioavailable nitrogen to the global oceans and therewith drives modern-day marine primary productivity. The diazotrophs mainly responsible for the fixation of nitrogen are principally found in the cyanobacterial lineage with unicellular and filamentous non-heterocystous species dominating. There is evidence that diazotrophic cyanobacteria were of similar importance in ... read more the past nitrogen cycling, in particular during the formation of organic-rich deposits of the Phanerozoic (e.g. Pleistocene Mediterranean sapropels and Cretaceous black shales). However, the poor preservation potential and the lack of suitable geochemical tracers that are specific for N₂-fixing cyanobacteria have hampered their rigorous identification in the geological record. This thesis describes investigations aimed at a better understanding of the presence and past distribution of N₂-fixing cyanobacteria and their significance in the past nitrogen cycling. For this, a multiplicity of ...
Filamentous cyanobacteria, bathed in seawater and often growing in nutrient-rich environments, are surrounded by diverse communities of heterotrophic bacteria. The heterotrophic bacteria closely associated with cyanobacteria likely consume released nutrients, but may also produce vitamins and other factors useful to cyanobacterial growth, as well as assisting in cycling of CO2 and phosphate, or lowering O2 levels for oxygen-sensitive processes such as nitrogen fixation [1, 2]. Various studies have classified some of the taxa of heterotrophic bacteria that live in close proximity to cyanobacterial blooms, including common aquatic phyla such as Proteobacteria, Bacteroidetes, Actinobacteria, and Planctomycetes [3, 4]. Some potentially new species or genera were also located within these samples, which could suggest that some bacteria may have specific relationships with cyanobacteria [3]. However, many of these latter bacteria are also found living independently of cyanobacteria [4], and the makeup ...
Cyanobacteria have an interesting trick to harvest sunlight during light fluctuations. In darkness, the cells prepare for a subsequent increase in light intensity by adopting a larger light-harvesting antenna. Researchers ...
As the world struggles to reduce its dependence on fossil fuels and curb greenhouse gas emissions, industrial biotechnology is also going green. Escherichia coli has long been used as a model Gram-negative bacterium, not only for fundamental research, but also for industrial applications. Recently, however, cyanobacteria have emerged as candidate chassis for the production of commodity fuels and chemicals, utilizing CO2 and sunlight as the main nutrient requirements. In addition to their potential for reducing greenhouse gas emissions and lowering production costs, cyanobacteria have naturally efficient pathways for the production metabolites such as carotenoids, which are of importance in the nutraceutical industry. The unique metabolic and regulatory pathways present in cyanobacteria present new challenges for metabolic engineers and synthetic biologists. Moreover, their requirement for light and the dynamic regulatory mechanisms of the diurnal cycle further complicate the development and
A new Michigan State University study has identified a family of genes in cyanobacteria that help control carbon dioxide fixation.
POSTDOCTORAL POSITION One postdoctoral research associate position is immediately available in my laboratory to study the biogenesis and function of photosystem II, a membrane-bound pigment-protein complex in the unicellular cyanobacterium Synechocystis 6803. Required expertise in one or more of the following areas: protein chemistry, molecular biology and spectroscopy. Strong preferences will be given to individuals with proven records of quality publications and to those with potentials to obtain independent funding. Please send CV and three letters of recommendation to : Prof. Himadri Pakrasi Department of Biology Campus Box 1137, Washington University, St. Louis, MO 63130, USA. Phone : 314-935 6853 Fax: 314-935-6803 ...
Coloured scanning electron micrograph (SEM) of Scytonema sp. , Gram negative, oxygenic, photosynthetic, filamentous cyanobacterium (prokaryote). Cells are dividing at the tips of the filaments. Magnification: x240 when shortest axis printed at 25 millimetres. - Stock Image C032/2561
center>,big>,big>,big>Cyanobacteria - Blue-Green Algae,/big>,/big>,/big>,/center> ,br> [[Image:Anabaena sperica.jpg,thumb,200px,center,Anabaena sperica, a filamentous cyanobacterium ([[Phycobacteria]], [[Nostocales]], [[Nostocaceae]])]] ,br> ,table border=1 cellpadding=3 cellspacing=1 width=100% > ,tr>,th bgcolor=#CCCCCC colspan=2>Cyanobacteria,/th>,/tr> ,tr> ,td align=center width=200 valign=top >Linnaean Hierarchy,/td> ,td align=center width=400 valign=top >Local Cladogram,/td> ,/tr> ,tr> ,td align=justify valign=top > [[Domain]]: [[Eubacteria]],br> [[Division]]: Cyanobacteria,br> [[Order]]s: * [[Chroococcales]] * [[Prochlorales]] * [[Pleurocapsales]] * [[Oscillatoriales]] * [[Nostocales]] * [[Stigonematales]] ,/td> ,td align=justify valign=top> [[LUCA]] ,--[[Eubacteria]] (note) , ,--[[Clostridea]] , `--[[Cyanobacteria]] , see [[#Phylogeny,phylogeny section]] (below) for subgroups `--[[Neomura]] ,--[[Archaea]] ...
Cyanobacteria, also known as blue-green algae, differ most prominently from other bacteria in that cyanobacteria possess chlorophyll A, while most bacteria do not contain chlorophyll. This gives them...
National Geographic. Merismopedia (from the Greek merismos (division) and the Greek pedion (plain) ) is a genus of cyanobacteria found on fresh and marine waters. It is ovoid or spherical in shape and are arranged in rows and flats, forming rectangular colonies held together by a mucilaginous matrix. Species in this genus divide in only two directions, creating a characteristic grid-like pattern. The cyanobacteria Merismopedia sp. are fairly common in several varieties of water habitats. Along with other cyanobacteria, they contribute to primary production through photosynthesis. They also can produce lipopolysaccharides which are known to create skin irritation and gastrointestinal distress (NOAA). Currently no genome sequencing projects of Merimopedia strains are ongoing. However, several similar blue-green algae cyanobacteria have been sequenced or are currently in progress. Although there is still a lot of data that needs to be collected from an individual genome sequencing of a Merismopedia ...
1. The strict photoautotrophic blue-green alga, Anacystis nidulans, has a high requirement for manganese; its absence from the culture medium causes significant changes in the morphology and the...
A Oceanografiaonline foi um dos sites pioneiros em divulgação da Oceanografia no Brasil. Em 2009 a Oceanografiaonline.com comemora seus 10 anos online ...
On June 12, 2017, JRWA hosted Hilary Snook of EPA to provide a workshop to area watershed and pond associations and town agents in order to launch public volunteer monitoring of our water bodies for cyanobacteria. Art Edgerton of Pembroke, and PACTV generously recorded the workshop and activities. More information is also available from EPA at https://cyanos.org/ where you can also download an app to participate in the nationwide effort to track and control dangerous blooms of cyanobacteria.. ...
During studies 44 years ago, researchers concluded that cyanobacteria were missing an essential enzyme of the metabolic pathway that is found in most other life forms, Bryant explained. They concluded that cyanobacteria lacked the ability to make one enzyme, called 2-oxoglutarate dehydrogenase, and that this missing enzyme rendered the bacteria unable to produce a compound -- called succinyl-coenzyme A -- for the next step in the TCA cycle. The absence of this reaction was assumed to render the organisms unable to oxidize metabolites for energy production, although they could still use the remaining TCA-cycle reactions to produce substrates for biosynthetic reactions. As it turns out, the researchers just werent looking hard enough, so there was more work to be done. ...