Английская Википедия:5-phytase
Шаблон:Short description Шаблон:Infobox enzyme 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]Шаблон:Update inline 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
As of late 2007, only the phytase purified from lily pollen had its structure solved, with PDB accession codes Шаблон:PDB link, Шаблон:PDB link, Шаблон:PDB link, Шаблон:PDB link, Шаблон:PDB link, and Шаблон:PDB link.
See also
- 3-phytase (1-phytase)
- 4-phytase (6-phytase)
- Protein tyrosine phosphatase
References
Шаблон:Esterases Шаблон:Enzymes Шаблон:Portal bar
