V-Type Proton ATPase Subunit S1

**Semantic type:** Amino Acid, Peptide, or Protein

**Definition:** V-type proton ATPase subunit S1 (470 aa, ~52 kDa) is encoded by the human ATP6AP1 gene. This protein plays a role in the acidification of vacuoles.

**Synonyms:** - ATP6AP1 - ATPase H+ Transporting Accessory Protein 1 - Protein XAP-3 - V-ATPase Ac45 Subunit - V-ATPase S1 Accessory Protein - V-ATPase Subunit S1 - Vacuolar ATPase Subunit 1 - Vacuolar Proton Pump Subunit S1