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Biotransformation of p ‐coumaric acid by Paecilomyces variotii
Author(s) -
Sachan A.,
Ghosh S.,
Mitra A.
Publication year - 2006
Publication title -
letters in applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.698
H-Index - 110
eISSN - 1472-765X
pISSN - 0266-8254
DOI - 10.1111/j.1472-765x.2005.01801.x
Subject(s) - microbiology and biotechnology , library science , biology , computer science
Aims: To investigate the biotransformation of p ‐coumaric acid into p ‐hydroxybenzoic acid ( p ‐HBA) by Paecilomyces variotii Bainier MTCC 6581. Methods and Results: As a result of p ‐coumaric acid degradation by P. variotii , three phenolic metabolites, p ‐hydroxybenzaldehyde ( p ‐HBAld), p ‐HBA and protocatechuic acid were formed. These phenolics were detected using TLC and HPLC. The identity of p ‐HBA and p ‐HBAld was further confirmed by mass spectrometry. Various analyses showed that 10·0 mmol l −1 concentration of p ‐coumaric acid produced a maximum amount of p‐ hydroxybenzoic acid, 200 mg l −1 , into the medium at 37°C with high‐density cultures. Conclusions: A catabolic pathway of p ‐coumaric acid by the fungus P. variotii is suggested for the first time. During the process of p ‐coumaric acid degradation, p ‐HBA accumulated in the medium as the major degradation product. Significance and Impact of the Study: Microbial degradation of cinnamic acid and hydroxycinnamic acid has continued to be the focus of intensive study. The main goal was to identify the microbial species capable of converting these substances into commercially value‐added products such as benzoic acid derivatives or aromatic aldehydes.