7AQK

Model of the actin filament Arp2/3 complex branch junction in cells

7AQK の概要

• エントリーDOI: 10.2210/pdb7aqk/pdb
• EMDBエントリー: 11869 11870
• 分子名称: Actin-related protein 2, Arp2, Actin-related protein 3, Arp3, Actin-related protein 2/3 complex subunit 1b, ArpC1b, ... (8 entities in total)
• 機能のキーワード: actin, arp2-3 complex, cytoskeleton, structural protein
• 由来する生物種: Mus musculus (House mouse); 詳細
• タンパク質・核酸の鎖数: 18
• 化学式量合計: 687297.04

構造登録者

Faessler, F.,Dimchev, G.,Hodirnau, V.V.,Wan, W.,Schur, F.K.M. (登録日: 2020-10-22, 公開日: 2020-12-02, 最終更新日: 2024-05-01)

主引用文献

Fassler, F.,Dimchev, G.,Hodirnau, V.V.,Wan, W.,Schur, F.K.M.
Cryo-electron tomography structure of Arp2/3 complex in cells reveals new insights into the branch junction.
Nat Commun, 11:6437-6437, 2020

PubMed Abstract: The actin-related protein (Arp)2/3 complex nucleates branched actin filament networks pivotal for cell migration, endocytosis and pathogen infection. Its activation is tightly regulated and involves complex structural rearrangements and actin filament binding, which are yet to be understood. Here, we report a 9.0 Å resolution structure of the actin filament Arp2/3 complex branch junction in cells using cryo-electron tomography and subtomogram averaging. This allows us to generate an accurate model of the active Arp2/3 complex in the branch junction and its interaction with actin filaments. Notably, our model reveals a previously undescribed set of interactions of the Arp2/3 complex with the mother filament, significantly different to the previous branch junction model. Our structure also indicates a central role for the ArpC3 subunit in stabilizing the active conformation.

PubMed: 33353942
DOI: 10.1038/s41467-020-20286-x

実験手法

ELECTRON MICROSCOPY (9 Å)