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tert-Butylphenolic Derivatives from Paenibacillus odorifer-A Case of Bioconversion
Thi-Bach-Le Nguyen1, Olivier Delalande2, Isabelle Rouaud3
1University of Rennes 1, CNRS, ISCR-UMR 6226, F-35000 Rennes, France. nguyen.bachle@yahoo.com.
Abstract:
Two compounds (1) and (2) containing tert-butylphenol groups were, for the first time, produced during the culture of Paenibacillus odorifer, a bacterial strain associated with the crustose lichen, Rhizocarpon geographicum. Their entire structures were identified by one-dimensional (1D) and two-dimensional (2D) NMR and high-resolution electrospray ionisation mass spectrometry (HRESIMS) spectroscopic analyses. Among them, Compound 1 exhibited significant cytotoxicity against B16 murine melanoma and HaCaT human keratinocyte cell lines with micromolar half maximal inhibitory concentration (IC50) values. Furthermore, after supplementation studies, a putative biosynthesis pathway was proposed for Compound 1 throughout a bioconversion by this bacterial strain of butylated hydroxyanisole (BHA), an antioxidant polymer additive.
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