2KN5

A Correspondence Between Solution-State Dynamics of an Individual Protein and the Sequence and Conformational Diversity of its Family

2KN5 の概要

• エントリーDOI: 10.2210/pdb2kn5/pdb
• 関連するPDBエントリー: 1D3Z 1XQQ 2K39 2NR2
• 分子名称: Ubiquitin (1 entity in total)
• 機能のキーワード: backrub, residual dipolar coupling, backbone flexibility, protein dynamics, cytoplasm, isopeptide bond, nucleus, phosphoprotein, ubl conjugation, gene regulation
• 由来する生物種: Homo sapiens (human)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 8576.83

構造登録者

Friedland, G.D. (登録日: 2009-08-14, 公開日: 2009-11-17, 最終更新日: 2024-05-22)

主引用文献

Friedland, G.D.,Lakomek, N.A.,Griesinger, C.,Meiler, J.,Kortemme, T.
A correspondence between solution-state dynamics of an individual protein and the sequence and conformational diversity of its family.
PLOS COMPUT.BIOL., 5:e1000393-e1000393, 2009

PubMed Abstract: Conformational ensembles are increasingly recognized as a useful representation to describe fundamental relationships between protein structure, dynamics and function. Here we present an ensemble of ubiquitin in solution that is created by sampling conformational space without experimental information using "Backrub" motions inspired by alternative conformations observed in sub-Angstrom resolution crystal structures. Backrub-generated structures are then selected to produce an ensemble that optimizes agreement with nuclear magnetic resonance (NMR) Residual Dipolar Couplings (RDCs). Using this ensemble, we probe two proposed relationships between properties of protein ensembles: (i) a link between native-state dynamics and the conformational heterogeneity observed in crystal structures, and (ii) a relation between dynamics of an individual protein and the conformational variability explored by its natural family. We show that the Backrub motional mechanism can simultaneously explore protein native-state dynamics measured by RDCs, encompass the conformational variability present in ubiquitin complex structures and facilitate sampling of conformational and sequence variability matching those occurring in the ubiquitin protein family. Our results thus support an overall relation between protein dynamics and conformational changes enabling sequence changes in evolution. More practically, the presented method can be applied to improve protein design predictions by accounting for intrinsic native-state dynamics.

PubMed: 19478996
DOI: 10.1371/journal.pcbi.1000393

実験手法

SOLUTION NMR