Abstract
Ferulic acid is an abundant cinnamic acid derivative found in the plant kingdom. It is a commercially available substrate utilized to produce flavor compounds such as 4-vinylguaiacol (4-VG), vanillin, and vanillic acid. The isolate Bacillus cereus SAS-3006 was screened and selected based on its ability to produce 4-VG upon ferulic acid biotransformation. It was identified based on morphological and physiochemical characteristics and its 16S ribosomal DNA sequence (GenBank accession number: KF699134). A maximum amount (79.4 mg/L) of 4-VG accumulation was observed on the 5th day of incubation when the culture was grown on 2.5 mM ferulic acid as sole carbon source. Further conversion of 4-VG to other intermediates such as vanillin, vanillic acid, protocatechuic acid, acetovanillone, and vanillyl alcohol was not observed. In-vitro conversion of ferulic acid to 4-VG was also studied with cell extracts of B. cereus SAS-3006. The present study provides the first evidence for production of 4-VG as the sole product using B. cereus SAS-3006.
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