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Vacuolar-type H⁺–ATPase (None)

Target: None
Molecular classification: Enzyme, ATP-driven proton pump

Overview

V-type proton ATPases (V-ATPases) are large, multisubunit enzyme complexes that function as ATP-driven proton pumps. They are found in the membranes of various intracellular organelles and, in some specialized cells, at the plasma membrane. Their primary role is to acidify compartments by translocating protons (H⁺ ions) across biological membranes using energy derived from ATP hydrolysis. Dysfunction or mutations in specific subunit isoforms have been linked to human diseases.

Other names: V-type proton ATPaseV-ATPase

Mechanism of action

Inhibition of proton transport by blocking ATP hydrolysis or proton translocation

Biological functions

Acidification of intracellular organellesProton transportpH regulationProtein degradation/processingReceptor-mediated endocytosis/exocytosisNeurotransmitter loadingHormone secretionBone resorptionUrine acidification

Disease associations

Renal tubular acidosisOsteopetrosisNeurodegenerative diseasesCancer

Safety considerations

Potential for off-target effects due to widespread expressionDisruption of cellular pH homeostasis

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