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Atp5j

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Atp5j

ATP synthase, H+ transporting, mitochondrial Fo complex, subunit F6
Identifiers
3.6.1.14
RNA expression pattern
Mitochondrial ATP synthase coupling factor 6 (F6)
solution structure of subunit f6 from the peripheral stalk region of atp synthase from bovine heart mitochondria
Identifiers
Symbol ATP-synt_F6
Pfam InterPro IPR008387

ATP synthase-coupling factor 6, mitochondrial is an enzyme that in humans is encoded by the ATP5J gene.[1][2][3]

Mitochondrial ATP synthase catalyzes ATP synthesis, utilizing an electrochemical gradient of protons across the inner membrane during oxidative phosphorylation. It is composed of two linked multi-subunit complexes: the soluble catalytic core, F1, and the membrane-spanning component, F0, which comprises the proton channel. The F1 complex consists of 5 different subunits (alpha, beta, gamma, delta, and epsilon) assembled in a ratio of 3 alpha, 3 beta, and a single representative of the other 3. The F0 seems to have nine subunits (a, b, c, d, e, f, g, F6 and 8). This gene encodes the F6 subunit of the F0 complex, required for F1 and F0 interactions. Alternatively spliced transcript variants encoding different isoforms have been identified for this gene.[3]

The F6 subunit is part of the peripheral stalk that links the F1 and FO complexes together, and which acts as a stator to prevent certain subunits from rotating with the central rotary element. The peripheral stalk differs in subunit composition between mitochondrial, chloroplast and bacterial F-ATPases. In mitochondria, the peripheral stalk is composed of one copy each of subunits OSCP (oligomycin sensitivity conferral protein), F6, B and D.[4] There is no homologue of subunit F6 in bacterial or chloroplast F-ATPase, whose peripheral stalks are composed of one copy of the delta subunit (homologous to OSCP), and two copies of subunit B in bacteria, or one copy each of subunits B and B' in chloroplasts and photosynthetic bacteria.

References

Further reading


This article incorporates text from the IPR008387


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