6WJE

Copper resistance protein copG- Form 2

6WJE の概要

• エントリーDOI: 10.2210/pdb6wje/pdb
• 関連するPDBエントリー: 6WIS
• 分子名称: DUF411 domain-containing protein, COPPER (II) ION, ZINC ION, ... (6 entities in total)
• 機能のキーワード: metal resistance copper-binding protein, metal binding protein
• 由来する生物種: Pseudomonas aeruginosa; 詳細
• タンパク質・核酸の鎖数: 6
• 化学式量合計: 84250.87

構造登録者

Hausrath, A.C.,Ly, A.T.,McEvoy, M.M. (登録日: 2020-04-13, 公開日: 2020-06-24, 最終更新日: 2024-11-13)

主引用文献

Hausrath, A.C.,Ramirez, N.A.,Ly, A.T.,McEvoy, M.M.
The bacterial copper resistance protein CopG contains a cysteine-bridged tetranuclear copper cluster.
J.Biol.Chem., 295:11364-11376, 2020

PubMed Abstract: CopG is an uncharacterized protein ubiquitous in Gram-negative bacteria whose gene frequently occurs in clusters of copper resistance genes and can be recognized by the presence of a conserved CxCC motif. To investigate its contribution to copper resistance, here we undertook a structural and biochemical characterization of the CopG protein from Results from biochemical analyses of CopG purified under aerobic conditions indicate that it is a green copper-binding protein that displays absorbance maxima near 411, 581, and 721 nm and is monomeric in solution. Determination of the three-dimensional structure by X-ray crystallography revealed that CopG consists of a thioredoxin domain with a C-terminal extension that contributes to metal binding. We noted that adjacent to the CxCC motif is a cluster of four copper ions bridged by cysteine sulfur atoms. Structures of CopG in two oxidation states support the assignment of this protein as an oxidoreductase. On the basis of these structural and spectroscopic findings and also genetic evidence, we propose that CopG has a role in interconverting Cu(I) and Cu(II) to minimize toxic effects and facilitate export by the Cus RND transporter efflux system.

PubMed: 32571874
DOI: 10.1074/jbc.RA120.013907

実験手法

X-RAY DIFFRACTION (2.5 Å)