Authors: Toru Jojima Takafumi Igari Yasuhiro Moteki Masako Suda Hideaki Yukawa Masayuki Inui
Publish Date: 2014/11/04
Volume: 99, Issue: 3, Pages: 1427-1433
Abstract
Corynebacterium glutamicum can consume glucose to excrete glycerol under oxygen deprivation Although glycerol synthesis from 13dihydroxyacetone DHA has been speculated no direct evidence has yet been provided in C glutamicum Enzymatic and genetic investigations here indicate that the glycerol is largely produced from DHA and unexpectedly the reaction is catalyzed by SSbutanediol dehydrogenase ButA that inherently catalyzes the interconversion between Sacetoin and SS23butanediol Consequently the following pathway for glycerol biosynthesis in the bacterium emerges dihydroxyacetone phosphate is dephosphorylated by HdpA to DHA which is subsequently reduced to glycerol by ButA This study emphasizes the importance of promiscuous activity of the enzyme in vivo
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