Regulation of F0F1-ATPase from Synechocystis sp. PCC 6803 by gamma and epsilon subunits is significant for light/dark adaptation.

ABSTRACT: The γ and ε subunits of F(0)F(1)-ATP synthase from photosynthetic organisms display unique properties not found in other organisms. Although the γ subunit of both chloroplast and cyanobacterial F(0)F(1) contains an extra amino acid segment whose deletion results in a high ATP hydrolysis activity (Sunamura, E., Konno, H., Imashimizu-Kobayashi, M., Sugano, Y., and Hisabori, T. (2010) Plant Cell Physiol. 51, 855-865), its ε subunit strongly inhibits ATP hydrolysis activity. To understand the physiological significance of these phenomena, we studied mutant strains with (i) a C-terminally truncated ε (ε(ΔC)), (ii) γ lacking the inserted sequence (γ(Δ198-222)), and (iii) a double mutation of (i) and (ii) in Synechocystis sp. PCC 6803. Although thylakoid membranes from the ε(ΔC) strain showed hig

SUBMITTER: Imashimizu M 

PROVIDER: S-EPMC3143624 | biostudies-literature | 2011 Jul

REPOSITORIES: biostudies-literature