3-phytase

In enzymology, a 3-phytase is an enzyme that catalyzes the chemical reaction


 * myo-inositol hexakisphosphate + H2O $$\rightleftharpoons$$ 1D-myo-inositol 1,2,4,5,6-pentakisphosphate + phosphate

Thus, the two substrates of this enzyme are myo-inositol hexakisphosphate and H2O, whereas its two products are 1D-myo-inositol 1,2,4,5,6-pentakisphosphate and phosphate.

This enzyme belongs to the family of hydrolases, specifically those acting on phosphoric monoester bonds. The systematic name of this enzyme class is myo-inositol-hexakisphosphate 3-phosphohydrolase. Other names in common use include 1-phytase, phytase, phytate 1-phosphatase, and phytate 6-phosphatase. This enzyme participates in inositol phosphate metabolism.

Structural studies
As of late 2007, 12 structures have been solved for this class of enzymes, with PDB accession codes, , , , , , , , , , , and.