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Biodegradation. 2008 Sep;19(5):659-67. Epub 2007 Dec 21.

Metabolic degradation of phenazine-1-carboxylic acid by the strain Sphingomonas sp. DP58: the identification of two metabolites.

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  • 1Key Laboratory of Microbial Metabolism, Ministry of Education, College of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, P.R. China.

Abstract

The biotransformation of phenazine-1-carboxylic acid (PCA) by PCA-degrading strain Sphingomonas sp. DP58 yielded small quantities of metabolites and was demonstrated for the first time. The metabolites were isolated by using preparative high-performance liquid chromatography (HPLC). In addition, these were subsequently characterized by gas chromatography (GC)-mass spectrum (MS) after N,O-bis(trimethylsilyl)trifluoroacetamide (BSTFA) derivatization and (1)H-nuclear magnetic resonance (NMR). They were identified as 4-hydroxy-1-(2-carboxyphenyl) azacyclobut-2-ene-2-carbonitrile (HPAEC) and 4-hydroxy-1-(2-carboxyphenyl)-2-azetidinecarbonitrile (HPAC). The two metabolites had transformational relationship between each other.

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