Mitochondrially encoded ATP synthase membrane subunit 8 (MT-ATP8)

Mitochondrially encoded ATP synthase membrane subunit 8 (MT-ATP8) is a small subunit of the F₀ portion of ATP synthase (Complex V) in the inner mitochondrial membrane. This essential enzyme complex generates ATP, the main cellular energy molecule, by coupling ADP phosphorylation to proton flow produced by the mitochondrial electron transport chain. MT-ATP8 is encoded by mitochondrial DNA and is not itself catalytically active, but is believed to stabilize and structurally organize the F₀ membrane domain, anchoring the stator to prevent futile rotation as protons translocate. Mutations in MT-ATP8 are implicated in diverse mitochondrial disorders, including hypertrophic cardiomyopathy, Leigh syndrome, and other multi-system diseases. There are no approved drugs specifically targeting this subunit, and inhibition of ATP synthase by agents such as oligomycin can have severe cytotoxic consequences due to abrogated energy production.

Other names

ATP synthase F₀ complex subunit 8ATP synthase subunit 8ATP8ATPASE8MTATP8A6LURFA6LF-ATPase subunit 8Mitochondrially encoded ATP synthase membrane subunit A6L

None established as there are no drugs specifically targeting this subunit. Drugs such as oligomycin inhibit the F₀ complex as a whole, blocking proton flow and ATP synthesis.