6KIO

Complex of yeast cytoplasmic dynein MTBD-High and MT without DTT

6KIO の概要

• エントリーDOI: 10.2210/pdb6kio/pdb
• EMDBエントリー: 9996
• 分子名称: Tubulin beta chain, Dynein heavy chain, cytoplasmic, Tubulin alpha-1A chain (3 entities in total)
• 機能のキーワード: motor protein-structural protein complex, motor protein/structural protein
• 由来する生物種: Saccharomyces cerevisiae S288c (Baker's yeast); 詳細
• タンパク質・核酸の鎖数: 3
• 化学式量合計: 109034.29

構造登録者

Komori, Y.,Nishida, N.,Shimada, I.,Kikkawa, M. (登録日: 2019-07-19, 公開日: 2020-03-04, 最終更新日: 2020-03-11)

主引用文献

Nishida, N.,Komori, Y.,Takarada, O.,Watanabe, A.,Tamura, S.,Kubo, S.,Shimada, I.,Kikkawa, M.
Structural basis for two-way communication between dynein and microtubules.
Nat Commun, 11:1038-1038, 2020

PubMed Abstract: The movements of cytoplasmic dynein on microtubule (MT) tracks is achieved by two-way communication between the microtubule-binding domain (MTBD) and the ATPase domain via a coiled-coil stalk, but the structural basis of this communication remains elusive. Here, we regulate MTBD either in high-affinity or low-affinity states by introducing a disulfide bond to the stalk and analyze the resulting structures by NMR and cryo-EM. In the MT-unbound state, the affinity changes of MTBD are achieved by sliding of the stalk α-helix by a half-turn, which suggests that structural changes propagate from the ATPase-domain to MTBD. In addition, MT binding induces further sliding of the stalk α-helix even without the disulfide bond, suggesting how the MT-induced conformational changes propagate toward the ATPase domain. Based on differences in the MT-binding surface between the high- and low-affinity states, we propose a potential mechanism for the directional bias of dynein movement on MT tracks.

PubMed: 32098965
DOI: 10.1038/s41467-020-14842-8

実験手法

ELECTRON MICROSCOPY (3.94 Å)