6KD0

Crystal Structure of Vibralactone Cyclase

6KD0 の概要

• エントリーDOI: 10.2210/pdb6kd0/pdb
• 分子名称: Vibralactone Cyclase (2 entities in total)
• 機能のキーワード: vibralactone cyclase, hydrolase
• 由来する生物種: Boreostereum vibrans
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 38718.91

構造登録者

Zeng, Y.,Feng, K.N. (登録日: 2019-06-30, 公開日: 2020-06-24, 最終更新日: 2023-11-22)

主引用文献

Feng, K.N.,Yang, Y.L.,Xu, Y.X.,Zhang, Y.,Feng, T.,Huang, S.X.,Liu, J.K.,Zeng, Y.
A Hydrolase-Catalyzed Cyclization Forms the Fused Bicyclic beta-Lactone in Vibralactone.
Angew.Chem.Int.Ed.Engl., 59:7209-7213, 2020

PubMed Abstract: Vibralactone is isolated from the basidiomycete fungus Boreostereum vibrans as one of the strongest lipase inhibitors. Its unusual β-lactone-fused bicycle is derived from an aryl ring moiety by an oxidative ring-expansion prior to an intramolecular cyclization. Herein, we report the discovery of the cyclase VibC which belongs to the α/β-hydrolase superfamily and is involved in the vibralactone biosynthesis. Biochemical and crystal studies suggest that VibC may catalyze an aldol or an electrocyclic reaction initiated by the Ser-His-Asp catalytic triad. For the aldol and pericyclic chemistry in living cells, VibC is a unique hydrolase performing the carbocycle formation of an oxepinone to a fused bicyclic β-lactone. This presents a naturally occurring, new enzymatic reaction in both aldol and hydrolase (bio)chemistry that will guide future exploitation of these enzymes in synthetic biology for chemical-diversity expansion of natural products.

PubMed: 32050043
DOI: 10.1002/anie.202000710

実験手法

X-RAY DIFFRACTION (1.8 Å)