Theatp1andatp2operons of the cyanobacteriumSynechocystissp. PCC 6803

✍ Scribed by Holger Lill; Nathan Nelson

• Publisher: Springer
• Year: 1991
• Tongue: English
• Weight: 876 KB
• Volume: 17
• Category: Article
• ISSN: 0167-4412
• DOI: 10.1007/bf00037050

✦ Synopsis

The two operons atpl and atp2, encoding the subunits of the FoF1 ATP-synthase, have been cloned and sequenced from the cyanobacterium Synechocystis sp. PCC 6803. The organization of the different genes in the operons have been found to resemble that of the cyanobacteria Synechococcus sp. PCC 6301 and Anabaena sp. PCC 7120. The Synechocystis FoF 1 ATP-synthase has nine subunits. A tenth open reading frame with unknown function was detected at the 5' end of atpl, coding for a putative gene product similar to uncI in Escherichia coli.

A promoter structure was inferred for the Synechocystis atp operons and compared to other known promoters of cyanobacteria. Even though the operon structure ofatpl and atp2 in Synechocystis resembles the corresponding operons of Synechococcus, the amino acid sequences of individual gene products show marked differences. Genetic distances between cyanobacterial genes and genes for ATP-synthase subunits from other species have been calculated and compiled into evolutionary trees.