atpA ATP synthase F1 sector subunit alpha ATPA_HORVU ATP synthase subunit alpha, chloroplastic 504 F-ATPase subunit alpha MATLRVDEIHKILRERIEQYNRKVGIENIGRVVQVGDGIARIIGLGEIMSGELVQFAEGTRGIALNLESKNVGIVLMGDGLMIQEGSFVKATGRIAQIPVSEAYLGRVVNALAKPIDGKGEIIASESRLIESPAPSIISRRSVYEPLQTGLIAIDSMIPIGRGQRELIIGDRQTGKTAVATDTILNQKGQGVICVYVAIGQRASSVAQVVTTFHEEGAMEYTIVVAEMADSPATLQYLAPYTGAALAEYFMYRERHTLIIYDDLSKQAQAYRQMSLLLRRPPGREAYPGDVFYLHSRLLERAAKLNSLLGEGSMTALPIVETQSGDVSAYIPTNVISITDGQIFLSADLFNAGIRPAINVGISVSRVGSAAQIKAMKQVAGKSKLELAQFAELQAFAQFASALDKTSQNQLARGRRLRELLKQSQANPLPVEEQIATIYTGTRGYLDSLEIEQVNKFLDELRKHLKDTKPQFQEIISSSKTFTEQAEILLKEAIQEQLERFSLQ Produces ATP from ADP in the presence of a proton gradient across the membrane. The alpha chain is a regulatory subunit (By similarity).