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In enzymology, a GTP cyclohydrolase IIa () is an enzyme that catalyzes the chemical reaction :GTP + 3 H2O 2-amino-5-formylamino-6-(5-phosphoribosylamino)pyrimidin-4(3H)-one + 2 phosphate Thus, the two substrates of this enzyme are GTP and H2O, whereas its two products are 2-amino-5-formylamino-6-(5-phosphoribosylamino)pyrimidin-4(3H)-one and phosphate. 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 GTP 8,9-hydrolase (phosphate-forming). ==References== * 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「GTP cyclohydrolase IIa」の詳細全文を読む スポンサード リンク
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