6J88

Crystal structure of HinD with benzo[b]thiophen analog

6J88 の概要

• エントリーDOI: 10.2210/pdb6j88/pdb
• 分子名称: Nocardicin N-oxygenase, PROTOPORPHYRIN IX CONTAINING FE, N-[(2S)-1-(1-benzothiophen-3-yl)-3-hydroxypropan-2-yl]-N~2~-methyl-L-valinamide, ... (4 entities in total)
• 機能のキーワード: p450, indolactam, oxidation, oxidoreductase
• 由来する生物種: Streptoalloteichus hindustanus
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 97725.26

構造登録者

Fei, H.,Mori, T.,Abe, I. (登録日: 2019-01-18, 公開日: 2019-08-07, 最終更新日: 2023-11-22)

主引用文献

He, F.,Mori, T.,Morita, I.,Nakamura, H.,Alblova, M.,Hoshino, S.,Awakawa, T.,Abe, I.
Molecular basis for the P450-catalyzed C-N bond formation in indolactam biosynthesis.
Nat.Chem.Biol., 15:1206-1213, 2019

PubMed Abstract: The catalytic versatility of cytochrome P450 monooxygenases is remarkable. Here, we present mechanistic and structural characterizations of TleB from Streptomyces blastmyceticus and its homolog HinD from Streptoalloteichus hindustanus, which catalyze unusual intramolecular C-N bond formation to generate indolactam V from the dipeptide N-methylvalyl-tryptophanol. In vitro analyses demonstrated that both P450s exhibit promiscuous substrate specificity, and modification of the N13-methyl group resulted in the formation of indole-fused 6/5/6 tricyclic products. Furthermore, X-ray crystal structures in complex with substrates and structure-based mutagenesis revealed the intimate structural details of the enzyme reactions. We propose that the generation of a diradical species is critical for the indolactam formation, and that the intramolecular C(sp)-H amination is initiated by the abstraction of the N1 indole hydrogen. After indole radical repositioning and subsequent removal of the N13 hydrogen, the coupling of the properly-folded diradical leads to the formation of the C4-N13 bond of indolactam.

PubMed: 31636430
DOI: 10.1038/s41589-019-0380-9

実験手法

X-RAY DIFFRACTION (2.35 Å)