|Superclasses:||Reactions Classified By Conversion Type → Simple Reactions → Chemical Reactions|
|Reactions Classified By Substrate → Small-Molecule Reactions|
EC Number: 18.104.22.168
Enzymes and Genes:
ribose-5-phosphate isomerase A : rpiA
allose-6-phosphate isomerase / ribose-5-phosphate isomerase B : rpiB
In Pathway: pentose phosphate pathway (non-oxidative branch)
The reaction direction shown, that is, A + B ↔ C + D versus C + D ↔ A + B, is in accordance with the Enzyme Commission system.
Mass balance status: Balanced.
Enzyme Commission Primary Name: ribose-5-phosphate isomerase
Enzyme Commission Synonyms: phosphopentosisomerase, phosphoriboisomerase, ribose phosphate isomerase, 5-phosphoribose isomerase, D-ribose 5-phosphate isomerase, D-ribose-5-phosphate ketol-isomerase
Part of the pentose phosphate pathway. This is part of the non-oxidative branch of the path, leading to xylulose 5-phosphate.
Enzyme Commission Summary:
Also acts on D-ribose 5-diphosphate and D-ribose 5-triphosphate.
HORECKER51: HORECKER BL, SMYRNIOTIS PZ, SEEGMILLER JE (1951). "The enzymatic conversion of 6-phosphogluconate to ribulose-5-phosphate and ribose-5-phosphate." J Biol Chem 193(1);383-96. PMID: 14907726
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