7W6V

Crystal structure of a dicobalt-substituted small laccase at 2.47 angstrom

7W6V の概要

• エントリーDOI: 10.2210/pdb7w6v/pdb
• 分子名称: Putative copper oxidase, COBALT (II) ION (3 entities in total)
• 機能のキーワード: cobalt-binding, metalloenzyme, oxidoreductase
• 由来する生物種: Streptomyces coelicolor A3(2)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 30726.04

構造登録者

Yang, X.,Wu, F.,Wu, W.,Chen, X.,Fan, S.,Yu, P.,Mao, L. (登録日: 2021-12-02, 公開日: 2022-11-09, 最終更新日: 2023-11-29)

主引用文献

Yang, X.,Wu, W.,Chen, X.,Wu, F.,Fan, S.,Yu, P.,Mao, L.
A versatile artificial metalloenzyme scaffold enabling direct bioelectrocatalysis in solution.
Sci Adv, 8:eabo3315-eabo3315, 2022

PubMed Abstract: Artificial metalloenzymes (ArMs) are commonly designed with protein scaffolds containing buried coordination pockets to achieve substrate specificity and product selectivity for homogeneous reactions. However, their reactivities toward heterogeneous transformations are limited because interfacial electron transfers are hampered by the backbone shells. Here, we introduce bacterial small laccase (SLAC) as a new protein scaffold for constructing ArMs to directly catalyze electrochemical transformations. We use molecular dynamics simulation, x-ray crystallography, spectroscopy, and computation to illustrate the scaffold-directed assembly of an oxo-bridged dicobalt motif on protein surface. The resulting ArM in aqueous phase catalyzes electrochemical water oxidation without mediators or electrode modifications. Mechanistic investigation reveals the role of SLAC scaffold in defining the four-electron transfer pathway from water to oxygen. Furthermore, we demonstrate that SLAC-based ArMs implemented with Ni, Mn, Ru, Pd, or Ir also enable direct bioelectrocatalysis of water electrolysis. Our study provides a versatile and generalizable route to complement heterogeneous repertoire of ArMs for expanded applications.

PubMed: 36322668
DOI: 10.1126/sciadv.abo3315

実験手法

X-RAY DIFFRACTION (2.47 Å)