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. 1997 Jul;63(7):2741–2746. doi: 10.1128/aem.63.7.2741-2746.1997

Identification of a novel cytochrome P-450 gene from the white rot fungus Phanerochaete chrysosporium.

S W Kullman 1, F Matsumura 1
PMCID: PMC168569  PMID: 9212420

Abstract

A gene fragment belonging to the cytochrome P-450 superfamily has been cloned and identified from stationary cultures of the filamentous fungus Phanerochaete chrysosporium by reverse transcriptase (RT)-PCR. A set of degenerate primers homologous to highly conserved regions of known cytochrome P-450 sequences were used for initial RT-PCRs. Individual PCR products were cloned, sequenced, and identified as those belonging to the cytochrome P-450 superfamily based on amino acid sequence homologies and the presence of the highly conserved heme binding region. The nucleotide sequence of a single cDNA clone indicated the presence of an open reading frame encoding a partial cytochrome P-450 protein of 208 amino acids. Comparisons of the deduced amino acid sequence of the partial protein to other known cytochrome P-450 sequences indicate that it is the first member of a new family of cytochrome P-450s, designated CYP63-1A. Northern blot analysis suggests that CYP63-1A is expressed under both nitrogen-rich and nitrogen-deficient culture conditions and thus not under the same regulatory constraints as the well-studied lignin and manganese peroxidases. Western blot analyses using antibodies raised to the heme binding region of CYP63-1A indicate that the protein has a molecular mass of approximately 44,000 Da.

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Selected References

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