8HEX

C5 portal vertex in HCMV B-capsid

これはPDB形式変換不可エントリーです。

8HEX の概要

• エントリーDOI: 10.2210/pdb8hex/pdb
• EMDBエントリー: 34696
• 分子名称: Triplex capsid protein 2, Triplex capsid protein 1, Capsid vertex component 1, ... (9 entities in total)
• 機能のキーワード: b-capsid, c5 portal vertex, in-situ structure, virus, viral protein
• 由来する生物種: Human betaherpesvirus 5; 詳細
• タンパク質・核酸の鎖数: 23
• 化学式量合計: 1383672.83

構造登録者

Li, Z.,Yu, X. (登録日: 2022-11-08, 公開日: 2023-11-01, 最終更新日: 2025-06-25)

主引用文献

Li, Z.,Pang, J.,Gao, R.,Wang, Q.,Zhang, M.,Yu, X.
Cryo-electron microscopy structures of capsids and in situ portals of DNA-devoid capsids of human cytomegalovirus.
Nat Commun, 14:2025-2025, 2023

PubMed Abstract: The portal-scaffold complex is believed to nucleate the assembly of herpesvirus procapsids. During capsid maturation, two events occur: scaffold expulsion and DNA incorporation. The portal-scaffold interaction and the conformational changes that occur to the portal during the different stages of capsid formation have yet to be elucidated structurally. Here we present high-resolution structures of the A- and B-capsids and in-situ portals of human cytomegalovirus. We show that scaffolds bind to the hydrophobic cavities formed by the dimerization and Johnson-fold domains of the major capsid proteins. We further show that 12 loop-helix-loop fragments-presumably from the scaffold domain-insert into the hydrophobic pocket of the portal crown domain. The portal also undergoes significant changes both positionally and conformationally as it accompanies DNA packaging. These findings unravel the mechanism by which the portal interacts with the scaffold to nucleate capsid assembly and further our understanding of scaffold expulsion and DNA incorporation.

PubMed: 37041152
DOI: 10.1038/s41467-023-37779-0

実験手法

ELECTRON MICROSCOPY (4 Å)