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In enzymology, a sepiapterin deaminase (EC 3.5.4.24) is an enzyme that catalyzes the chemical reaction
- sepiapterin + H2O xanthopterin-B2 + NH3
Thus, the two substrates of this enzyme are sepiapterin and H2O whereas its two products are xanthopterin-B2 and NH3.
This enzyme belongs to the family of hydrolases, those acting on carbon-nitrogen bonds other than peptide bonds, specifically in cyclic amidines. The systematic name of this enzyme class is sepiapterin aminohydrolase.
References
- Tsusué M (April 1971). "Studies on sepiapterin deaminase from the silkworm, Bombyx mori. Purification and some properties of the enzyme". Journal of Biochemistry. 69 (4): 781–8. PMID 5572808.
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