7PUY

Structure of the membrane soluble spike complex from the Lassa virus in a C3-symmetric map

7PUY の概要

• エントリーDOI: 10.2210/pdb7puy/pdb
• EMDBエントリー: 13662
• 分子名称: Glycoprotein G2, Pre-glycoprotein polyprotein GP complex, 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose, ... (5 entities in total)
• 機能のキーワード: spike complex, glycoprotein, viral protein
• 由来する生物種: Lassa virus (strain Mouse/Sierra Leone/Josiah/1976) (LASV); 詳細
• タンパク質・核酸の鎖数: 6
• 化学式量合計: 179955.86

構造登録者

Diskin, R.,Katz, M. (登録日: 2021-10-01, 公開日: 2021-12-29, 最終更新日: 2024-10-23)

主引用文献

Katz, M.,Weinstein, J.,Eilon-Ashkenazy, M.,Gehring, K.,Cohen-Dvashi, H.,Elad, N.,Fleishman, S.J.,Diskin, R.
Structure and receptor recognition by the Lassa virus spike complex.
Nature, 603:174-179, 2022

PubMed Abstract: Lassa virus (LASV) is a human pathogen, causing substantial morbidity and mortality. Similar to other Arenaviridae, it presents a class-I spike complex on its surface that facilitates cell entry. The virus's cellular receptor is matriglycan, a linear carbohydrate that is present on α-dystroglycan, but the molecular mechanism that LASV uses to recognize this glycan is unknown. In addition, LASV and other arenaviruses have a unique signal peptide that forms an integral and functionally important part of the mature spike; yet the structure, function and topology of the signal peptide in the membrane remain uncertain. Here we solve the structure of a complete native LASV spike complex, finding that the signal peptide crosses the membrane once and that its amino terminus is located in the extracellular region. Together with a double-sided domain-switching mechanism, the signal peptide helps to stabilize the spike complex in its native conformation. This structure reveals that the LASV spike complex is preloaded with matriglycan, suggesting the mechanism of binding and rationalizing receptor recognition by α-dystroglycan-tropic arenaviruses. This discovery further informs us about the mechanism of viral egress and may facilitate the rational design of novel therapeutics that exploit this binding site.

PubMed: 35173332
DOI: 10.1038/s41586-022-04429-2

実験手法

ELECTRON MICROSCOPY (3.3 Å)