FoF1-ATP synthase of Streptomyces fradiae ATCC 19609: structural, biochemical, and functional characterization

Biochemistry. Biokhimii︠a︡
M G AlekseevaValery N Danilenko

Abstract

The patterns of protein phosphorylation in inverted membrane vesicles from the strain Streptomyces fradiae ATCC 19609 were investigated to elucidate the mechanisms of regulation of bacterial membrane bound FoF1-ATP synthase. We found for the first time by two-dimensional gel electrophoresis and mass spectrometry that the β- and b-subunits of the FoF1-ATP synthase complex undergo phosphorylation; 20 proteins with known functions were identified. All eight subunits of FoF1-ATP synthase, i.e. α, β, γ, δ, ε, a, b, and c, were cloned into Escherichia coli and expressed as recombinant proteins. Using a crude preparation of serine/threonine protein kinases, we demonstrated the phosphorylation of recombinant γ-, β-, α- and ε-subunits. The β-subunit was phosphorylated both as a recombinant protein and in vesicles. Differential phosphorylation of membrane-bound and recombinant proteins can be attributed to different pools of protein kinases in each preparation; in addition, certain steps of FoF1-ATP synthase assembly and function might be accompanied by individual phosphorylation patterns. The structure of the operon containing all subunits and regulatory protein I was identified. The phylogenetic similarity of FoF1-ATP synthase from Str...Continue Reading

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Citations

Oct 27, 2015·Genome Announcements·Aleksey A VatlinValery N Danilenko
Apr 20, 2017·The Journal of Antibiotics·Lyudmila N LysenkovaAndrey E Shchekotikhin
May 12, 2019·Natural Product Research·Lyudmila N LysenkovaAndrey E Shchekotikhin

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