9BML

State-2 of the motor domain from full-length human dynein-1 in 5mM AMPPNP

9BML の概要

• エントリーDOI: 10.2210/pdb9bml/pdb
• EMDBエントリー: 44702
• 分子名称: Cytoplasmic dynein 1 heavy chain 1, ADENOSINE-5'-DIPHOSPHATE, ADENOSINE-5'-TRIPHOSPHATE, ... (4 entities in total)
• 機能のキーワード: dynein-1, motor protein
• 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: 534896.34

構造登録者

Chai, P.,Zhang, K. (登録日: 2024-05-02, 公開日: 2025-04-23, 最終更新日: 2025-04-30)

主引用文献

Chai, P.,Yang, J.,Geohring, I.C.,Markus, S.M.,Wang, Y.,Zhang, K.
The mechanochemical cycle of reactive full-length human dynein 1.
Nat.Struct.Mol.Biol., 2025

PubMed Abstract: Dynein-driven cargo transport has a pivotal role in diverse cellular activities, central to which is dynein's mechanochemical cycle. Here, we performed a systematic cryo-electron microscopic investigation of the conformational landscape of full-length human dynein 1 in reaction, in various nucleotide conditions, on and off microtubules. Our approach reveals over 40 high-resolution structures, categorized into eight states, providing a dynamic and comprehensive view of dynein throughout its mechanochemical cycle. The described intermediate states reveal mechanistic insights into dynein function, including a 'backdoor' phosphate release model that coordinates linker straightening, how microtubule binding enhances adenosine triphosphatase activity through a two-way communication mechanism and the crosstalk mechanism between AAA1 and the regulatory AAA3 site. Our findings also lead to a revised model for the force-generating powerstroke and reveal means by which dynein exhibits unidirectional stepping. These results improve our understanding of dynein and provide a more complete model of its mechanochemical cycle.

PubMed: 40263469
DOI: 10.1038/s41594-025-01543-3

実験手法

ELECTRON MICROSCOPY (3.3 Å)