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Pathway Description
Propanoyl-CoA Degradation
Escherichia coli
Metabolic Pathway
The degradation of propanoyl-CoA starts with propanoyl-CoA undergoing a decarboxylase reaction by reacting with hydrogen carbonate and ATP resulting in the release of a phosphate, an ADP, a hydrogen ion and an S-methylmalonyl-CoA. This compound in turn reacts through an epimerase reaction resulting in the release of a R-methylmalonyl-CoA. This compound in turn can undergo a reversible reaction through a methylmalonyl-CoA mutase resulting in the release of a succinyl-CoA. This compound can be converted back to R-methylmalonyl-CoA through a methylmalonyl-CoA mutase.
Methylmalonyl-CoA can then be converted into propanoyl-CoA through a methylmalonyl CoA decarboxylase . This compound in turn reacts with a succinate through a propionyl-CoA succinate CoA transferase resulting in the release of a propanoate and a succinyl-CoA.
References
Propanoyl-CoA Degradation References
Kay WW: Genetic control of the metabolism of propionate by Escherichia coli K12. Biochim Biophys Acta. 1972 May 16;264(3):508-21.
Pubmed: 4554901
Haller T, Buckel T, Retey J, Gerlt JA: Discovering new enzymes and metabolic pathways: conversion of succinate to propionate by Escherichia coli. Biochemistry. 2000 Apr 25;39(16):4622-9.
Pubmed: 10769117
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