ABMIUM target intelligence

CA4

carbonic anhydrase 4

Carbonic anhydrase 4 (CA4; carbonic anhydrase IV/CA-IV) is a GPI-anchored membrane zinc metalloenzyme with an extracellular catalytic domain. It catalyses reversible CO2 hydration and is studied in extracellular pH regulation, bicarbonate transport, renal physiology and retinal acid handling.

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OrganismMultiple species; representative: Homo sapiens (Human) NCBI Gene762 UniProtP22748

ABMIUM research catalogue

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Alternative names and identifiers

Names used across publications, databases and supplier catalogues.

Carbonic anhydrase 4carbonic anhydrase IVCA IVCA-IVCAH4Car4RP17

Biological function

CA4 catalyses reversible conversion of carbon dioxide and water to bicarbonate and protons at the cell surface, helping couple extracellular carbon chemistry to pH homeostasis. Reviewed UniProt also supports roles in bicarbonate-transporter activity and retinal acid removal.

Research context

CA4 research spans membrane-associated carbonic-anhydrase catalysis, renal bicarbonate handling, capillary CO2 exchange, retinal pH homeostasis and transporter coupling. Its extracellular, GPI-anchored localisation differentiates it experimentally from cytosolic CA1 to CA3.