Function
Essential transmembrane GTPase, which mediates mitochondrial fusion (PubMed:9685359, PubMed:9786948, PubMed:10562274, PubMed:11266460, PubMed:15297626, PubMed:15760898, PubMed:16624808, PubMed:19812251, PubMed:21385840, PubMed:21502136, PubMed:23317502, PubMed:27253069). Fusion proceeds through several steps; first mitochondria are tethered together, then brought into close contact, followed by the formation of a docking ring around contact areas, and finally membrane fusion (PubMed:27253069). Fusion of mitochondria occurs in many cell types and constitutes an important step in mitochondrial morphology, which is balanced between fusion and fission, mediated by FZO1 and DNM1, respectively (PubMed:10562274). Functions antagonistically with DNM1 (PubMed:10562274). Probably acts by forming membrane contact sites that mediate mitochondrial membrane fusion (PubMed:27253069). Mitochondrial docking and fusion requires GTP hydrolysis (PubMed:15297626, PubMed:19812251, PubMed:27253069). Mitochondrial fusion promotes also increased lifespan.
Sequence
MSEGKQQFKDSNKPHKDSTDQDDDAATIVPQTLTYSRNEGHFLGSNFHGVTDDRTTLFDGEEGRREDDLLPSLRSSNSKAHLISSQLSQWNYNNNRVLLKRSILKTQAFMDQLQEENNIRPIFIAANDEREKLHVLQLNIKLDGQYNTKEKNGFNIEKKALSKLFHSQIVSVTNHLNALKKRVDDVSSKVFITGDVNTGKSALCNSLLKQRLLPEDQLPCTNVFSEILEARENDGIEEVHAIPLNIAPTLKEAIDMYSIQNPKTYEIHTLKELPDLVPQNGKYALLKIYIKDDKRPASTSLLRNGTVDISLIDSPGLNMDSLQTAEVMSRQEEIDLVIFVVNAENQLTLSAKEFISLASREKKLMFFVVKKFDKIRDKQRCKELILKQIRDLSPETYKRAADFVHFVSKNGDELPHYHNENDNEDHGDRKPDDDPYSSSDPDPDFDSLEDSLRNFVLKKRSLSKLLPAKTYLSKLLSDIIMISKSNMKMYSEEEIKINEQLETLRPEILSARAKCNDLTTSVDQMAEQTITMTYNNTKEALLNALDVPLHEYPKYQGLGQIYDFIFSTEAFIANQIDESIGSSELFAKQKTDLLVKKIYEIGKNELGDDFMCERVFRSELMFRKRKHLIGKRLKVSLSITDLFAPTWKGFLSYLSWQKPVTAPLPDIEGQTNEGQIGLMKYLGLKNYPLTQYWSRPSLLFTSKIPTLTLYFLGSTKVVGNIILNGIKLSSWSSLKKLSVPVIVVGSLLGLTYLIHDLPRALPMNLSIKYKRKLQELDYIHLNAQRTSNEVRDVLRVPTREILRSCEIIMDKKQITKKELENKKESNLLSIKFFQSLYEGTVAQKLMVEEINLDID