Cheng Q, Lamb DC, Kelly SL, Lei L, Guengerich FP. Cyclization of a cellular dipentaenone by Streptomyces coelicolor cytochrome P450 154A1 without oxidation/reduction.
J Am Chem Soc 2011;
132:15173-5. [PMID:
20979426 DOI:
10.1021/ja107801v]
[Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report a comprehensive genetic, metabolomic, and biochemical study on the catalytic properties of Streptomyces coelicolor cytochrome P450 (P450) 154A1, known to have a unique heme orientation in its crystal structure. Deletion of the P450 154A1 gene compromised the long-term stability of the bacterial spores. A novel dipentaenone (1) with a high degree of conjugation was identified as an endogenous substrate of P450 154A1 using a metabolomics approach. The biotransformation of 1 by P450 154A1 was shown to be an unexpected intramolecular cyclization to a Paternò-Büchi-like product, without oxidation/reduction.
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