V-type proton ATPase subunit d 2 (Atp6v0d2)

Subunit of the integral membrane V0 complex of vacuolar ATPase. Vacuolar ATPase is responsible for acidifying a variety of intracellular compartments in eukaryotic cells, thus providing most of the energy required for transport processes in the vacuolar system (By similarity).

May play a role in coupling of proton transport and ATP hydrolysis. Regulator of osteoclast fusion and bone formation.