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Topic: Cyanobacterium


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In the News (Tue 8 Dec 09)

  
  Analysis of the hupSL Operon of the Nonheterocystous Cyanobacterium Lyngbya majuscula CCAP 1446/4: Regulation of ...
Reevaluation of the nitrogen fixation behaviour in the marine non-heterocystous cyanobacterium Lyngbya majuscula.
An overview of the genome of Nostoc punctiforme, a multicellular, symbiotic cyanobacterium.
-fixation by the benthic freshwater cyanobacterium Lyngbya wollei.
aem.asm.org /cgi/content/full/71/8/4567   (6025 words)

  
  Stanley E. Stevens, Ph.D., Professor
Expression of the Escherichia coli lacZ gene on a plasmid vector in a cyanobacterium.
The glnA gene of the cyanobacterium Agmenellum quadruplicatum PR-6 is nonessential for ammonium assimilation.
Developmental biology of the thermophilic cyanobacterium Mastigocladus laminosus.
biology.memphis.edu /stevens.htm   (3749 words)

  
 CyanoNews Vol. 14, Number 1: Photosynthesis references
Raman spectroscopic and light-induced kinetic characterization of a recombinant phytochrome of the cyanobacterium Synechocystis.
Fluorescence and photochemistry of recombinant phytochrome from the cyanobacterium Synechocystis.
Characterization of a gene encoding dihydrolipoamide dehydrogenase of the cyanobacterium Synechocystis sp.
www.vcu.edu /cyanonews/V14/photosyn.htm   (4916 words)

  
 CyanoNews Vol. 14, Number 1: Physiology references
The gshB gene in the cyanobacterium Synechococcus sp.
Resistance of the cultures of the cyanobacterium Anacystis nidulans and the microalga Dunaliella maritima to the toxic action of vanadium as influenced by phosphate, iron and cysteine.
Composition of the carbohydrate granules of the cyanobacterium, Cyanothece sp.
www.people.vcu.edu /~elhaij/cyanonews/V14/physiol.htm   (4154 words)

  
 Publications by Donald A. Bryant
Assembly of [4Fe-4S] clusters in Photosystem I. Inactivation of the rubA gene encoding a membrane-associated rubredoxin in the cyanobacterium Synechococcus sp.
Cloning and Characterization of the psaE Gene of the Cyanobacterium Synechococcus sp.
Characterization of the [3Fe-4S] and [4Fe-4S] Clusters in Unbound PsaC Mutants Cl4D and C5lD.
www.bmb.psu.edu /about/pubs/bryant_pubs.html   (2593 words)

  
 JGI Synechococcus elongatus Home
Expression of the iron-responsive irpA gene from the cyanobacterium Synechococcus sp strain PCC 7942.
Diffusion of phycobilisomes on the thylakoid membranes of the cyanobacterium Synechococcus 7942.
Passive entry of CO2 and its energy-dependent intracellular conversion to HCO3- in cyanobacteria are driven by a photosystem I-generated deltamuH+.
genome.jgi-psf.org /finished_microbes/synel/synel.home.html   (930 words)

  
 Decastronema kotori gen. nov., comb. nov.: a mat-forming cyanobacterium on Cretaceous carbonate platforms and its ...
In 1975 De Castro recognized the true relationships of this microbial fossil: a cyanobacterium related closely to the modern genus Scytonema.
The fossil is common in the sediments of the Mesozoic carbonate platforms of southern Europe.
He recognized that the the peculiar architecture of the walls was comparable to that of modern scytonematacean cyanobacteria and deduced that this fossil was an ancient cyanobacterium.
paleopolis.rediris.es /cg/CG2006_A02/index.html   (8263 words)

  
 Teresa Thiel, PhD
An overview of the genome of Nostoc punctiforme, a multicellular, symbiotic cyanobacterium.
Effect on heterocyst differentiation of nitrogen fixation in vegetative cells of the cyanobacterium Anabaena variabilis ATCC 29413.
Characterization of nifB, nifS, and nifU mutants of the cyanobacterium Anabaena variabilis: NifB is required for the V-dependent nitrogenase.
www.umsl.edu /~thiel   (719 words)

  
 Differential Expression of Photosynthesis and Nitrogen Fixation Genes in the Cyanobacterium Plectonema boryanum -- ...
Differential Expression of Photosynthesis and Nitrogen Fixation Genes in the Cyanobacterium Plectonema boryanum
Mohamed A, Eriksson J, Osiewacz HD, Jansson C (1993) Differential expression of the psbA genes in the cyanobacterium, Synechocystis 6803.
Schrautemeier B, Cassing A, Böhme H (1994) Characterization of the genome region encoding an Fdx H-type ferredoxin and a new 2[4Fe-4S] ferredoxin from the non-heterocystous, nitrogen-fixing cyanobacterium, Plectonema boryanum PCC73110.
www.plantphysiol.org /cgi/content/full/122/3/731   (3419 words)

  
 Vermaas Publications
Vermaas, W.F.J., Shen, G., and Styring, S. (1994) Electrons generated by photosystem II are utilized by an oxidase in the absence of photosystem I in the cyanobacterium Synechocystis sp.
Howitt, C.A., and Vermaas, W. (1998) Quinol and cytochrome oxidases in the cyanobacterium Synechocystis sp.
Cooley, J., Howitt, C.A., and Vermaas, W.F.J. (2000) Succinate:quinol oxidoreductases in the cyanobacterium Synechocystis sp.
photoscience.la.asu.edu /photosyn/faculty/Vermaas/vermaaspubs.html   (2857 words)

  
 Molecular Expressions: Featured Microscopist - Spike (M.I.) Walker - Cyanobacterium (Gleotrichia echinulata)
Featured below is a photomicrograph of a familiar cyanobacterium found in many lakes and reservoirs.
Gleotrichia echinulata is a familiar fresh water cyanobacterium found in lakes and reservoirs, where its pompon-like colonies can form thick blooms.
The photomicrograph presented above was taken with a planapochromatic 25x/0.65 NA objective coupled to an oil-immersion darkfield condenser.
micro.magnet.fsu.edu /featuredmicroscopist/walker/walkerimage08.html   (480 words)

  
 BioMed Central | Full text | Envelope structure of Synechococcus sp. WH8113, a nonflagellated swimming cyanobacterium
Theoretical work suggests that a cyanobacterium could swim at the observed speeds by oscillating its surface in the manner of a traveling wave [6,13].
Whereas motility is powered by an ion-motive force across the cell membrane [17] and the protein SwmA that is required for propulsion is associated with the outer membrane [3], the traveling wave must be formed at the very exterior of the cell body, outside the crystalline surface layer.
Type IV pili (Tfp) have been implicated in the gliding movement of a species of the cyanobacterium Synechocystis [2], social gliding of Myxococcus, and twitching motility of Pseudomonas aeruginosa [14].
www.biomedcentral.com /1471-2180/1/4   (2283 words)

  
 Overexpression of a Na+/H+ antiporter confers salt tolerance on a freshwater cyanobacterium, making it capable of ...
The salt tolerance of a freshwater cyanobacterium, Synechococcus sp.
improved the salt tolerance of the freshwater cyanobacterium.
antiporter gene (apnhaP) from a halotolerant cyanobacterium Aphanothece
www.pnas.org /cgi/content/full/99/6/4109   (3356 words)

  
 DNA methyltransferases of the cyanobacterium Anabaena PCC 7120 -- Matveyev et al. 29 (7): 1491 -- Nucleic Acids Research
18 Elhai,J. and Wolk,C.P. (1990) Developmental regulation and spatial pattern of expression of the structural genes for nitrogenase in the cyanobacterium Anabaena.
22 Matveyev,A.V., Rutgers,E., Soderback,E. and Bergman,B. (1994) A novel genome rearrangement involved in heterocyst differentiation of the cyanobacterium Anabaena sp PCC 7120.
37 Scharnagl,M., Richter,S. and Hagemann,M. (1998) The cyanobacterium Synechocystis sp.
nar.oxfordjournals.org /cgi/content/full/29/7/1491   (7970 words)

  
 Microbes@NASA: Image Gallery - Light Micrographs
Prominent in the photograph are the blue green trichomes (in bundles) of the cyanobacterium Microcoleus chthonoplastes.
An empty sheath (presumably from the cyanobacterium Microcoleus chthonoplastes appears to have been colonized by the corkscrew-shaped trichomes of the cyanobacterium Spirulina sp.
Filaments and sheaths of the cyanobacterium Lyngbya sp.
microbes.arc.nasa.gov /gallery/lightms.html   (375 words)

  
 Expression Analysis of Multiple dnaK Genes in the Cyanobacterium Synechococcus elongatus PCC 7942 -- Sato et al. 189 ...
Expression Analysis of Multiple dnaK Genes in the Cyanobacterium Synechococcus elongatus PCC 7942 -- Sato et al.
dnaK3) in the genome of cyanobacterium Synechococcus elongatus
Isolation and characterization of a dnaK genomic locus in a halotolerant cyanobacterium Aphanothece halophytica.
jb.asm.org /cgi/content/full/189/10/3751   (4923 words)

  
 Cyanobacterium and green algae : Dennis Kunkel Microscopy, Inc, - Scientific Stock Photography
Cyanobacterium and green algae : Dennis Kunkel Microscopy, Inc, - Scientific Stock Photography
Light micrograph of a cyanobacterium (Anabaena sp.) and the green algae: Netrium and Zygnema sp.
It has specialized cells called heterocysts that have the ability to fix atmospheric nitrogen in soil.
www.denniskunkel.com /DK/Algae/910209-07.html   (360 words)

  
 Synechocystis sp. PCC 6803 - Introduction
Even today, cyanobacteria and their close relatives, the prochlorophytes, are responsible for a large portion of the photosynthetic production in the open ocean.
Therefore, cyanobacteria have learned to adapt and survive in a huge range of conditions, and their metabolism and lifestyle therefore is very flexible.
PCC 6803 has developed into a model cyanobacterium that scientists around the world are using.
lsweb.la.asu.edu /Synechocystis   (1030 words)

  
 Role of light in the response of PSII photochemistry to salt stress in the cyanobacterium Spirulina platensis -- Lu and ...
Role of light in the response of PSII photochemistry to salt stress in the cyanobacterium Spirulina platensis -- Lu and Zhang 51 (346): 911 -- Journal of Experimental Botany
Lu C, Zhang J. Copper-induced inhibition of PSII photochemistry in cyanobacterium Spirulina platensis is stimulated by light.
Schubert H, Hagemann M. Salt stress on 77K fluorescence and photosynthesis in the cyanobacterium Synechocystis sp.
jxb.oxfordjournals.org /cgi/content/full/51/346/911   (3448 words)

  
 Circadian Rhythms in the Thermophilic Cyanobacterium Thermosynechococcus elongatus: Compensation of Period Length over ...
for analyzing the circadian clock in the cyanobacterium.
Circadian expression of the dnaK gene in the cyanobacterium Synechocystis sp.
Influence of light on accumulation of photosynthesis-specific transcripts in the cyanobacterium Synechocystis 6803.
jb.asm.org /cgi/content/full/186/15/4972   (3647 words)

  
 Grand challenge seeks carbon sequestration, hydrogen production solutions
Two of the most critical environmental and energy science challenges of the twenty-first century are being addressed in a system biology program funded by the W.R. Wiley Environmental Molecular Sciences Laboratory (EMSL), a National User facility managed by the Pacific Northwest National Laboratory for the Department of Energy (DOE).
Because Cyanobacteria make significant contributions to harvesting solar energy, planetary carbon sequestration, metal acquisition, and hydrogen production in marine and freshwater ecosystems, the genetics and biochemistry of these organisms are particularly suitable for such an approach.
Specifically, Pakrasi and his collaborators are focusing on the amazing cyanobacterium Cyanothece, a one-celled marine cyanobacterium, which is a bacterium with a well-defined circadian rhythm, or biological clock.
www.eurekalert.org /pub_releases/2006-02/wuis-gcs013106.php   (714 words)

  
 Green Car Congress: DOE Grand Challenge Project Completes Sequencing of Cyanobacterium
A Department of Energy Grand Challenge project led by Washington University in St. Louis has resulted in the rapid sequencing and annotation of a cyanobacterium that could yield clues to how environmental conditions influence key carbon fixation processes at the gene-mRNA-protein levels in an organism.
Learning the intricacies of these organisms could lead to breakthroughs in the understanding of both biological carbon sequestration and hydrogen production, according to Himadri Pakrasi of Washington University, the project leader, speaking at the annual meeting of the American Association for the Advancement of Science in St. Louis.
Cyanothece, a one-celled marine cyanobacterium, has the ability to produce oxygen and assimilate carbon through photosynthesis during the day while fixing nitrogen through the night, all within the same cell.
www.greencarcongress.com /2006/02/doe_grand_chall.html   (631 words)

  
 Azolla and Anaebaena Symbiosis
Algae and fungi live together in an association called lichen, and nitrogen-fixing bacteria live symbiotically inside the root nodules of legumes.
But one of the most fascinating of all plant marriages involves a tiny aquatic water fern (Azolla) and a microscopic filamentous blue-green alga or cyanobacterium (Anabaena azollae).
The barbed glochidia on the male spore clusters presumably cause them to cling to the female megaspores, thus facilitating fertilization.
waynesword.palomar.edu /plnov98.htm   (2357 words)

  
 Prof. Dr. Siegfried Scherer   (Site not responding. Last check: )
Scherer S, Alpes I, Sadowski H, Böger P (1988) Ferredoxin-NADP oxidoreductase is the respiratory NADPH dehydrogenase of the cyanobacterium Anabaena variabilis.
Alpes I, Scherer S, Böger P (1989) The respiratory NADH dehydrogenase of the cyanobacterium Anabaena variabilis: Purification and characterization.
Scherer S, Riege H, Böger P (1988a) Light-induced proton release by the cyanobacterium Anabaena variabilis: Dependence on carbon dioxide and sodium.
www.weihenstephan.de /micbio/staff/scherer.htm   (1905 words)

  
 A calcium signal is involved in heterocyst differentiation in the cyanobacterium Anabaena sp. PCC7120 -- Torrecilla et ...
A calcium signal is involved in heterocyst differentiation in the cyanobacterium Anabaena sp.
Lockau, W., Massalsky, B. and Dirmeier, A. Purification and partial characterization of a calcium-stimulated protease from the cyanobacterium, Anabaena variabilis.
Maldener, I., Lockau, W., Cai, Y. and Wolk, C. The calcium-dependent protease of the cyanobacterium Anabaena: molecular cloning and expression of the gene in Escherichia coli, sequencing and site-directed mutagenesis.
mic.sgmjournals.org /cgi/content/full/150/11/3731   (5152 words)

  
 Complete Genomic Sequence of the Filamentous Nitrogen-fixing Cyanobacterium Anabaena sp. Strain PCC 7120 -- Kaneko et ...
Impaired Photosynthesis in Phosphatidylglycerol-Deficient Mutant of Cyanobacterium Anabaena sp.
Identification of Low-temperature-regulated ORFs in the Cyanobacterium Anabaena sp.
An Atypical KdpD Homologue from the Cyanobacterium Anabaena sp.
dnaresearch.oxfordjournals.org /cgi/content/abstract/8/5/205   (2396 words)

  
 Protection of photosystem II against UV-A and UV-B radiation in the cyanobacterium Plectonema boryanum: The role of ...
Protection of photosystem II against UV-A and UV-B radiation in the cyanobacterium Plectonema boryanum: The role of growth temperature and growth irradiance
Protection of Photosystem II Against UV-A and UV-13 Radiation in the Cyanobacterium Plectonema boryanum: The Role of Growth Temperature and Growth Irradiance(Para)
The present study was performed to examine the impact of acclimation of the filamentous cyanobacterium, Plectonema boryanum UTEX 485, to various growth irradiance and temperatures on its susceptibility to PSII photoinhibition induced by UV-B irradiation in combination with UV-A as well as UV-A alone.
www.findarticles.com /p/articles/mi_qa3931/is_200012/ai_n8925778   (701 words)

  
 Ultrafast Dynamics of Phytochrome from the Cyanobacterium Synechocystis, Reconstituted with Phycocyanobilin and ...
Ultrafast Dynamics of Phytochrome from the Cyanobacterium Synechocystis, Reconstituted with Phycocyanobilin and Phycoerythrobilin -- Heyne et al.
Ultrafast Dynamics of Phytochrome from the Cyanobacterium Synechocystis, Reconstituted with Phycocyanobilin and Phycoerythrobilin
Phytochrome Cph1 from the cyanobacterium Synechocystis PCC6803: purification, assembly and quarternary structure.
www.biophysj.org /cgi/content/full/82/2/1004   (6550 words)

  
 Mobilization of Photosystem II Induced by Intense Red Light in the Cyanobacterium Synechococcus sp PCC7942 -- Sarcina ...
A proportion of chlorophyll fluorescence in the cyanobacterium
PCC7942 is influenced by the trimerisation of photosystem I. Photosynth.
Sarcina, M., Tobin, M.J., and Mullineaux, C.W. Diffusion of phycobilisomes on the thylakoid membranes of the cyanobacterium Synechococcus 7942: Effects of phycobilisome size, temperature and membrane lipid composition.
www.plantcell.org /cgi/content/full/18/2/457   (4325 words)

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