Synechococcus elongatus PCC 7942

Names Synechococcus elongatus PCC 7942
Accession numbers NC_007595, NC_007604
Background The freshwater cyanobacterium Synechococcus PCC 7942 (previously known as Anacystis nidulans R2) was the first cyanobacterium demonstrated to be reliably transformable by exogenously added DNA. Over the decades many genetic tools have been developed for Synechococcus and applied to other transformable cyanobacteria. Strain PCC 7942 is an obligate photoautotroph with a genome of approximately 2.7 Mb. It has been extensively studied by a multi-national research community with respect to: acquisition of inorganic carbon, transport and regulation of nitrogen compounds, response to iron deprivation, acclimation to a variety of nutrient stresses, adaptation to environmental variations in temperature and light intensity and photosynthesis. In recent years, Synechococcus PCC 7942 has taken a pioneering position as the only developed model system for exploring the mechanism of the prokaryotic circadian clock. Gene organization and sequence are nearly identical to another freshwater cyanobacterium Synechococcus elongatus PCC 6301 (SYNP6) except for a large inversion of 187 kb. The endpoints of this inversion are found in genes that may encode outer membrane porins, and thus the two proteins in question are polymorphic with respect to one another. These differences may explain the fact that SYNE7 is naturally competent for transformation while SYNP6 is not. (EBI Integr8)
Strain PCC 7942
Complete Yes
Sequencing centre (08-AUG-2005) US DOE Joint Genome Institute, 2800 Mitchell Drive B100, Walnut Creek, CA 94598-1698, USA
(10-NOV-2005) National Center for Biotechnology Information, NIH, Bethesda, MD 20894, USA
Sequencing quality Level 6: Finished
Sequencing depth NA
Sequencing method NA
Isolation site fresh water
Isolation country USA
Number of replicons 2
Gram staining properties Negative
Shape Bacilli
Mobility Yes
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 Chains, Singles
Sporulation NA
Metabolism NA
Energy source Photoautotroph, Photosynthetic
Diseases NA
Pathogenicity No