In enzymology, a Zn2+-exporting ATPase (EC 3.6.3.5) is an enzyme that catalyzes the chemical reaction
ATP + H2O + Zn2+"in" formula_1 ADP + phosphate + Zn2+"out"
The 3 substrates of this enzyme are ATP, H2O, and Zn2+, whereas its 3 products are ADP, phosphate, and Zn2+.
This enzyme belongs to the family of hydrolases, specifically those acting on acid anhydrides to catalyse transmembrane movement of substances. The systematic name of this enzyme class is ATP phosphohydrolase (Zn2+-exporting). Other names in common use include Zn(II)-translocating P-type ATPase, P1B-type ATPase, and AtHMA4 (the "A. thaliana" protein).
Structural studies.
As of late 2007, two structures have been solved for this class of enzymes, with PDB accession codes 1MWY and 1MWZ. Moreover, nanobodies have recently been raised against a zinc-transporting ATPase (ZntA) which are able to bind and inhibit the ATPase activity, showing potential for further structural studies.
References.
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