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TitleThe cryo-electron microscopy structure of Broad Bean Stain Virus suggests a common capsid assembly mechanism among comoviruses.
Journal, issue, pagesVirology, Vol. 530, Page 75-84, Year 2019
Publish dateFeb 13, 2019
AuthorsFrançois Lecorre / Joséphine Lai-Kee-Him / Stéphane Blanc / Jean-Louis Zeddam / Stefano Trapani / Patrick Bron /
PubMed AbstractThe Broad bean stain virus (BBSV) is a member of the genus Comovirus infecting Fabaceae. The virus is transmitted through seed and by plant weevils causing severe and widespread disease worldwide. ...The Broad bean stain virus (BBSV) is a member of the genus Comovirus infecting Fabaceae. The virus is transmitted through seed and by plant weevils causing severe and widespread disease worldwide. BBSV has a bipartite, positive-sense, single-stranded RNA genome encapsidated in icosahedral particles. We present here the cryo-electron microscopy reconstruction of the BBSV and an atomic model of the capsid proteins refined at 3.22 Å resolution. We identified residues involved in RNA/capsid interactions revealing a unique RNA genome organization. Inspection of the small coat protein C-terminal domain highlights a maturation cleavage between Leu567 and Leu568 and interactions of the C-terminal stretch with neighbouring small coat proteins within the capsid pentameric turrets. These interactions previously proposed to play a key role in the assembly of the Cowpea mosaic virus suggest a common capsid assembly mechanism throughout all comovirus species.
External linksVirology / PubMed:30782565
MethodsEM (single particle)
Resolution3.22 Å
Structure data

4504

6qcc

EMDB-4504, PDB-6qcc:
Cryo-EM Atomic Structure of Broad Bean Stain Virus (BBSV)
Method: EM (single particle) / Resolution: 3.22 Å

Source
  • broad bean stain virus
KeywordsVIRUS / comovirus capsid plant virus BBSV

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