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| 	phosphoribosylaminoimidazole carboxylase  : ウィキペディア英語版 |   phosphoribosylaminoimidazole carboxylase
  Phosphoribosylaminoimidazole carboxylase (or AIR carboxylase) is an enzyme involved in nucleotide biosynthesis and in particular in purine biosynthesis. It catalyzes the conversion of 5'-phosphoribosyl-5-aminoimidazole ("AIR") into 5'-phosphoribosyl-4-carboxy-5-aminoimidazole ("CAIR") as described in the reaction: :5-aminoimidazole ribonucleotide + CO2  5'-phosphoribosyl-4-carboxy-5-aminoimidazole + 2 H+ ==In plants and fungi== Phosphoribosylaminoimidazole carboxylase is a fusion protein in plants and fungi, but consists of two non-interacting proteins in bacteria, PurK and PurE.  The crystal structure of PurE indicates a unique quaternary structure that confirms the octameric nature of the enzyme.
  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「phosphoribosylaminoimidazole carboxylase」の詳細全文を読む
 
 
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