Cyanothece sp. PCC 7424

Cyanothece_sp.
Names Cyanothece sp. PCC 7424
Accession numbers NC_011729, NC_011730, NC_011732, NC_011733, NC_011734, NC_011737, NC_011738
Background Cyanobacteria are oxygenic, phototrophic organisms. They encode two photosystems (PSI and PSII) releasing electrons from water and fix carbon dioxide via the Calvin-Benson-Bassham pathway. Thus they absorb large quantities of C(O)2 and produce (O)2. Some cyanobacteria are also able to fix (N)2.An aerobic, unicellular, diazotrophic cyanobacterium, Cyanothece sp. ATCC 51142 was isolated from an intertidal ares in Texas (as isolate BH68). As an organism that is both photosynthetic (producing oxygen) and nitrogen fixing it has to solve the problem that the N(2)-fixing enzyme, nitrogenase, is highly sensitive to oxygen. It has developed a temporal regulation in which N(2) fixation and photosynthesis occur at different times throughout a diurnal cycle with very high levels of CO(2) fixation during the light and high levels of N(2) fixation in the dark. It produces and consumes high quantities of inclusion bodies, including those for the products of photosynthesis (glycogen) and nitrogen fixation (cyanophycin). It is one the very rare cyanobacteria to encode a phosphoenolpyruvate carboxykinase which performs the first step of gluconeogenesis.This enzyme links carbon, organic acid and amino acid metabolism. Interestingly it has the first linear chromosome seen in cyanobacteria (adapted from PubMed 18812508). (HAMAP: CYAA5)
Taxonomy
Kingdom:Bacteria
Phylum:Cyanobacteria
Class:NA
Order:Chroococcales
Family:NA
Genus:Cyanothece
Species:7424
Strain PCC 7424
Complete Yes
Sequencing centre (11-DEC-2008) US DOE Joint Genome Institute, 2800 Mitchell Drive B100, Walnut Creek, CA 94598-1698, USA
(17-DEC-2008) National Center for Biotechnology Information, NIH, Bethesda, MD 20894, USA
Sequencing quality Level 6: Finished
Sequencing depth NA
Sequencing method NA
Isolation site Rice fields in Senegal
Isolation country Senegal
Number of replicons 7
Gram staining properties Negative
Shape Cocci
Mobility No
Flagellar presence No
Number of membranes 2
Oxygen requirements Facultative
Optimal temperature NA
Temperature range Mesophilic
Habitat Aquatic
Biotic relationship Free living
Host name NA
Cell arrangement Singles
Sporulation NA
Metabolism Nitrogen fixation
Energy source Autotroph
Diseases NA
Pathogenicity No