6TIT

VSV G_440

Summary for 6TIT

• Entry DOI: 10.2210/pdb6tit/pdb
• Descriptor: Glycoprotein, 2-acetamido-2-deoxy-beta-D-glucopyranose, ACETATE ION, ... (7 entities in total)
• Functional Keywords: viral fusion protein, vsv, vesicular stomatitis virus, glycoprotein, ectodomain, viral protein
• Biological source: Recombinant vesicular stomatitis Indiana virus rVSV-G/GFP
• Total number of polymer chains: 1
• Total formula weight: 49766.72

Authors

Albertini, A.A.,Belot, L.,Abouhamdan, A.,Gaudin, Y. (deposition date: 2019-11-22, release date: 2020-09-02, Last modification date: 2024-10-23)

Primary citation

Beilstein, F.,Abou Hamdan, A.,Raux, H.,Belot, L.,Ouldali, M.,Albertini, A.A.,Gaudin, Y.
Identification of a pH-Sensitive Switch in VSV-G and a Crystal Structure of the G Pre-fusion State Highlight the VSV-G Structural Transition Pathway.
Cell Rep, 32:108042-108042, 2020

PubMed Abstract: VSV fusion machinery, like that of many other enveloped viruses, is triggered at low pH in endosomes after virion endocytosis. It was suggested that some histidines could play the role of pH-sensitive switches. By mutating histidine residues H22, H60, H132, H162, H389, H397, H407, and H409, we demonstrate that residues H389 and D280, facing each other in the six-helix bundle of the post-fusion state, and more prominently H407, located at the interface between the C-terminal part of the ectodomain and the fusion domain, are crucial for fusion. Passages of recombinant viruses bearing mutant G resulted in the selection of compensatory mutations. Thus, the H407A mutation in G resulted in two independent compensatory mutants, L396I and S422I. Together with a crystal structure of G, presented here, which extends our knowledge of G pre-fusion structure, this indicates that the conformational transition is initiated by refolding of the C-terminal part of the G ectodomain.

PubMed: 32814045
DOI: 10.1016/j.celrep.2020.108042

Experimental method

X-RAY DIFFRACTION (2.07 Å)