5-phytase
Class of enzymes
From Wikipedia, the free encyclopedia
The enzyme 5-phytase[1] (EC 3.1.3.72) catalyzes the reaction
- myo-inositol hexakisphosphate + H2O = 1L-myo-inositol 1,2,3,4,6-pentakisphosphate + phosphate
myo-Inositol hexakisphosphate is also known as phytic acid.
These enzymes belongs to the family of hydrolases, specifically those acting on phosphoric monoester bonds. The systematic name of this enzyme class is myo-inositol-hexakisphosphate 5-phosphohydrolase.
Prevalence
Of the hundreds of phytase enzymes that have been characterized in the literature, only two have been characterized as 5-phytases.[2][needs update] A histidine acid phosphatases purified from lily pollen[1] and a protein tyrosine phosphatase-like phytase from Selenomonas ruminantium subsp. lactilytica[2] were both found to have specificity for the 5-phosphate position of myo-inositol hexakisphosphate.
Structural studies
See also
- 3-phytase (1-phytase)
- 4-phytase (6-phytase)
- Protein tyrosine phosphatase
