Cytochrome P450–catalyzed L-tryptophan nitration in thaxtomin phytotoxin biosynthesis.
Cytochrome P450–catalyzed L-tryptophan nitration in thaxtomin phytotoxin biosynthesis.
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DOI:
10.1038/nchembio.1048
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发表时间:
2012-10
影响因子:
14.8
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中科院分区:
文献类型:
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Thaxtomin phytotoxins produced by plant-pathogenic Streptomyces species contain a nitro group that is essential for phytotoxicity. The N,N’-dimethyldiketopiperazine core of thaxtomins is assembled from L-phenylalanine and L-4-nitrotryptophan by a nonribosomal peptide synthetase and nitric oxide synthase-generated NO is incorporated into the nitro group, but the biosynthesis of the non-proteinogenic amino acid L-4-nitrotryptophan is unclear. Here we report that TxtE, a unique cytochrome P450, catalyzes L-tryptophan nitration using NO and O2.