6LJI

X-ray structure of synthetic GB1 domain with mutations K10(DVA), T11V

6LJI の概要

• エントリーDOI: 10.2210/pdb6lji/pdb
• 関連するPDBエントリー: 6L91 6L9B 6L9D
• 分子名称: Immunoglobulin G-binding protein G (2 entities in total)
• 機能のキーワード: synthetic gb1 domain variant, d-aminoacid substitution, immune system
• 由来する生物種: Streptococcus sp. group G
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 12307.31

構造登録者

Penmatsa, A.,Chatterjee, J.,Majumder, P.,Khatri, B. (登録日: 2019-12-16, 公開日: 2020-08-12, 最終更新日: 2024-10-23)

主引用文献

Khatri, B.,Majumder, P.,Nagesh, J.,Penmatsa, A.,Chatterjee, J.
Increasing protein stability by engineering the n -> pi * interaction at the beta-turn.
Chem Sci, 11:9480-9487, 2020

PubMed Abstract: Abundant n → π* interactions between adjacent backbone carbonyl groups, identified by statistical analysis of protein structures, are predicted to play an important role in dictating the structure of proteins. However, experimentally testing the prediction in proteins has been challenging due to the weak nature of this interaction. By amplifying the strength of the n → π* interaction amino acid substitution and thioamide incorporation at a solvent exposed β-turn within the proteins and Pin 1 WW domain, we demonstrate that an n → π* interaction increases the structural stability of proteins by restricting the torsion angle. Our results also suggest that amino acid side-chain identity and its rotameric conformation play an important and decisive role in dictating the strength of an n → π* interaction.

PubMed: 34094214
DOI: 10.1039/d0sc03060k

実験手法

X-RAY DIFFRACTION (1.843 Å)