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・ Phosphor thermometry
・ Phosphoramidate
・ Phosphoramidate—hexose phosphotransferase
・ Phosphoramide
・ Phosphoramidite
・ Phosphoramidon
・ Phosphorane
・ Phosphorene
・ Phosphorescence
・ Phosphorescent (band)
・ Phosphorescent Harvest
・ Phosphorescent organic light-emitting diode
・ Phosphoria Formation
・ Phosphoribokinase
・ Phosphoribosyl pyrophosphate
Phosphoribosyl-AMP cyclohydrolase
・ Phosphoribosyl-ATP diphosphatase
・ Phosphoribosyl-N-formylglycineamide
・ Phosphoribosylamine
・ Phosphoribosylamine—glycine ligase
・ Phosphoribosylaminoimidazole carboxylase
・ Phosphoribosylaminoimidazole synthetase
・ Phosphoribosylaminoimidazolecarboxamide formyltransferase
・ Phosphoribosylaminoimidazolesuccinocarboxamide
・ Phosphoribosylaminoimidazolesuccinocarboxamide synthase
・ Phosphoribosylanthranilate isomerase
・ Phosphoribosylformylglycinamidine synthase
・ Phosphoribosylglycinamide formyltransferase
・ Phosphoribosyltransferase
・ Phosphoribulokinase


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Phosphoribosyl-AMP cyclohydrolase : ウィキペディア英語版
Phosphoribosyl-AMP cyclohydrolase

In enzymology, a phosphoribosyl-AMP cyclohydrolase () is an enzyme that catalyzes the chemical reaction
:1-(5-phosphoribosyl)-AMP + H2O \rightleftharpoons 1-(5-phosphoribosyl)-5-(phosphoribosylamino)methylideneamino )imidazole-4-carboxamide
Thus, the two substrates of this enzyme are 1-(5-phosphoribosyl)-AMP and H2O, whereas its two products are phosphoribosylamino)methylideneamino]imidazole-4-carboxamide.
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 1-(5-phospho-D-ribosyl)-AMP 1,6-hydrolase. Other names in common use include PRAMP-cyclohydrolase, and phosphoribosyladenosine monophosphate cyclohydrolase. This enzyme participates in histidine metabolism.
==Structural studies==

As of late 2007, only one structure has been solved for this class of enzymes, with the PDB accession code .

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