4Y2I

Gold ion bound to GolB

4Y2I の概要

• エントリーDOI: 10.2210/pdb4y2i/pdb
• 関連するPDBエントリー: 4Y2K 4Y2M
• 分子名称: Putative metal-binding transport protein, GOLD ION (3 entities in total)
• 機能のキーワード: gold binding protein, metal transport
• 由来する生物種: Salmonella enterica subsp. enterica serovar Typhimurium
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 7321.80

構造登録者

Wei, W.,Wang, F.,Ma, L.,Zhao, J. (登録日: 2015-02-10, 公開日: 2016-02-10, 最終更新日: 2024-03-20)

主引用文献

Wei, W.,Sun, Y.,Zhu, M.,Liu, X.,Sun, P.,Wang, F.,Gui, Q.,Meng, W.,Cao, Y.,Zhao, J.
Structural Insights and the Surprisingly Low Mechanical Stability of the Au-S Bond in the Gold-Specific Protein GolB
J.Am.Chem.Soc., 137:15358-15361, 2015

PubMed Abstract: The coordination bond between gold and sulfur (Au-S) has been widely studied and utilized in many fields. However, detailed investigations on the basic nature of this bond are still lacking. A gold-specific binding protein, GolB, was recently identified, providing a unique opportunity for the study of the Au-S bond at the molecular level. We probed the mechanical strength of the gold-sulfur bond in GolB using single-molecule force spectroscopy. We measured the rupture force of the Au-S bond to be 165 pN, much lower than Au-S bonds measured on different gold surfaces (∼1000 pN). We further solved the structures of apo-GolB and Au(I)-GolB complex using X-ray crystallography. These structures showed that the average Au-S bond length in GolB is much longer than the reported average value of Au-S bonds. Our results highlight the dramatic influence of the unique biological environment on the stability and strength of metal coordination bonds in proteins.

PubMed: 26636614
DOI: 10.1021/jacs.5b09895

実験手法

X-RAY DIFFRACTION (2 Å)