4-phytase explained

4-phytase
Ec Number:	3.1.3.26
Cas Number:	9001-89-2
Go Code:	0008707

The enzyme 4-phytase catalyzes the following reaction:^[1]

myo-inositol hexakisphosphate + H₂O

\rightleftharpoons 1D-myo-inositol 1,2,3,5,6-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 4-phosphohydrolase. Other names in common use include 6-phytase (name based on 1L-numbering system and not 1D-numbering) and phytate 6-phosphatase.

Enzymes of this type participate in inositol phosphate metabolism.

See also

• 3-phytase (1-phytase)
• 5-phytase
• Protein tyrosine phosphatase

Notes and References

1. Mullaney EJ, Ullah AH . The term phytase comprises several different classes of enzymes . Biochemical and Biophysical Research Communications . 312 . 1 . 179–84 . December 2003 . 14630039 . 10.1016/j.bbrc.2003.09.176 .