Vacuolar proton pump subunit alpha 1 30 AEVLMDFPQLTMTLPDGREESVMKLTTLVA Catalytic subunit of the peripheral V1 complex of vacuolar ATPase. V-ATPase vacuolar ATPase is responsible for acidifying a variety of intracellular compartments in eukaryotic cells. VATA1_EQUAR V-type proton ATPase catalytic subunit A isoform 1 (Fragment)