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The atp1 and atp2 operons of the cyanobacterium Synechocystis sp. PCC 6803
Authors:Holger Lill  Nathan Nelson
Affiliation:(1) Roche Institute of Molecular Biology, Roche Research Center, 07110 Nutley, NJ, USA;(2) Present address: Abt. Biophysik, Universität Osnabrück, D-4500 Osnabrück, Germany
Abstract:The two operons atp1 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 FOF1 ATP-synthase has nine subunits. A tenth open reading frame with unknown function was detected at the 5prime end of atp1, 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 of atp1 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.
Keywords:F-ATPase  cyanobacteria  operon  evolution  photosynthesis
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