Mitochondrial membrane ATP synthase (F(1)F(0) ATP synthase or Complex V) produces ATP from ADP in the presence of a proton gradient across the membrane which is generated by electron transport complexes of the respiratory chain. F-type ATPases consist of two structural domains, F(1) - containing the extramembraneous catalytic core and F(0) - containing the membrane proton channel, linked together by a central stalk and a peripheral stalk. During catalysis, ATP synthesis in the catalytic domain of F(1) is coupled via a rotary mechanism of the central stalk subunits to proton translocation. Part of the complex F(0) domain. A homomeric c-ring of probably 10 subunits is part of the complex rotary element. Homooligomer (By similarity). F-type ATPases have 2 components, CF(1) - the catalytic core - and CF(0) - the membrane proton channel. CF(1) has five subunits: alpha(3), beta(3), gamma(1), delta(1), epsilon(1). CF(0) has three main subunits: a, b and c. Component of an ATP synthase complex composed of ATP5PB, ATP5MC1, ATP5F1E, ATP5PD, ATP5ME, ATP5PF, ATP5MF, MT-ATP6, MT-ATP8, ATP5F1A, ATP5F1B, ATP5F1D, ATP5F1C, ATP5PO, ATP5MG, ATP5MK and ATP5MJ (By similarity). Interacts with TMEM70 (homooligomer form); this interaction facilitates the oligomer formation of subunit c/ATP5MC1 (c-ring) and the c-ring membrane insertion and also protects ATP5MC1 against intramitochondrial proteolysis (By similarity). Trimethylated by ATPSCKMT at Lys-104. Methylation is required for proper incorporation of the C subunit into the ATP synthase complex and mitochondrial respiration. This protein is the major protein stored in the storage bodies of animals or humans affected with ceroid lipofuscinosis (Batten disease). There are three genes which encode the ATP synthase proteolipid and they specify precursors with different import sequences but identical mature proteins. Belongs to the ATPase C chain family.