| Modification Notes |
Mitochondrial ATP synthase is composed of two multi-subunit complexes that utilize an inner membrane electrochemical gradient to catalyze the synthesis of ATP during oxidative phosphorylation. The two multi-subunit complexes are designated F1 and F0, the former of which comprises the soluble catalytic core and the latter of which comprises the membrane-spanning proton channel of ATP synthase. F1 consists of five distinct subunits, designated ATP5A, ATP5B, ATP5C1, ATP5D and ATP5E, while F0 consists of ten subunits, designated ATP5H, ATP5G1, ATP5I, ATP5G2, ATP5J2, ATP5J, ATP5G3, ATP5S, ATP5F1 and ATP5L. ATP5J, also known as ATP5A, ATPM, CF6 or F6, is a 108 amino acid protein that localizes to the mitochondrial membrane and exists as a subunit of the F0 complex. ATP5J is expressed as multiple alternatively spliced isoforms and is required for proper F1 and F0 interaction. Human ATP5J shares 73% sequence similarity with its rat counterpart, suggesting a conserved role between species. |