Journal
PROCESS BIOCHEMISTRY
Volume 43, Issue 10, Pages 1132-1137Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.procbio.2008.06.006
Keywords
bioconversion; Enterobacter sp Px6-4; ferulic acid; vanillin; 4-vinylguaiacol
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Funding
- National Basic Research Program of China [2007CB411600]
- Department of Science and Technology of Yunnan Province [2007C170M, 2006C0004Q, 2005YX13, 2006GG22]
- China-Tobacco Industrial Company of Yunnan Province [2006FL01]
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This study reports a bacterium from Vanilla roots with the ability to utilize ferulic acid as the sole carbon source to produce vanillin. The strain was identified as Enterobacter sp. Px6-4 based on its 16S rDNA sequence and biochemical characteristics. The primary metabolites using ferulic acid as the sole carbon source include 4-vinylguaiacol, vanillin as well as other related chemicals, all of which share the same guaiacol-carbon-skeleton. Based on structural analyses of non-volatile compounds in the culture filtrate of this strain, two putative novel metabolites were isolated and identified. These results allowed us to propose the possible metabolic pathway leading from ferulic acid to vanillin via 4-vinylguaiacol. Our experiments elucidated for the first time of a ferulic acid metabolism via decarboxylation to produce 4-vinylguaiacol and a further conversion to vanillin in Enterobacter sp. Px6-4. (C) 2008 Elsevier Ltd. All rights reserved.
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