7KZO

Outer dynein arm docking complex bound to doublet microtubules from C. reinhardtii

これはPDB形式変換不可エントリーです。

7KZO の概要

• エントリーDOI: 10.2210/pdb7kzo/pdb
• EMDBエントリー: 23084
• 分子名称: Tubulin beta, Tubulin alpha, Dynein gamma chain, flagellar outer arm, ... (9 entities in total)
• 機能のキーワード: dynein, microtubule, cilia, motor protein
• 由来する生物種: Chlamydomonas reinhardtii; 詳細
• タンパク質・核酸の鎖数: 20
• 化学式量合計: 1529016.21

構造登録者

Walton, T.,Wu, H.,Brown, A.B. (登録日: 2020-12-10, 公開日: 2021-01-20, 最終更新日: 2024-03-06)

主引用文献

Walton, T.,Wu, H.,Brown, A.
Structure of a microtubule-bound axonemal dynein.
Nat Commun, 12:477-477, 2021

PubMed Abstract: Axonemal dyneins are tethered to doublet microtubules inside cilia to drive ciliary beating, a process critical for cellular motility and extracellular fluid flow. Axonemal dyneins are evolutionarily and biochemically distinct from cytoplasmic dyneins that transport cargo, and the mechanisms regulating their localization and function are poorly understood. Here, we report a single-particle cryo-EM reconstruction of a three-headed axonemal dynein natively bound to doublet microtubules isolated from cilia. The slanted conformation of the axonemal dynein causes interaction of its motor domains with the neighboring dynein complex. Our structure shows how a heterotrimeric docking complex specifically localizes the linear array of axonemal dyneins to the doublet microtubule by directly interacting with the heavy chains. Our structural analysis establishes the arrangement of conserved heavy, intermediate and light chain subunits, and provides a framework to understand the roles of individual subunits and the interactions between dyneins during ciliary waveform generation.

PubMed: 33473120
DOI: 10.1038/s41467-020-20735-7

実験手法

ELECTRON MICROSCOPY (3.3 Å)