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TitleNear-atomic, non-icosahedrally averaged structure of giant virus Paramecium bursaria chlorella virus 1.
Journal, issue, pagesNat Commun, Vol. 13, Issue 1, Page 6476, Year 2022
Publish dateOct 29, 2022
AuthorsQianqian Shao / Irina V Agarkova / Eric A Noel / David D Dunigan / Yunshu Liu / Aohan Wang / Mingcheng Guo / Linlin Xie / Xinyue Zhao / Michael G Rossmann / James L Van Etten / Thomas Klose / Qianglin Fang /
PubMed AbstractGiant viruses are a large group of viruses that infect many eukaryotes. Although components that do not obey the overall icosahedral symmetry of their capsids have been observed and found to play ...Giant viruses are a large group of viruses that infect many eukaryotes. Although components that do not obey the overall icosahedral symmetry of their capsids have been observed and found to play critical roles in the viral life cycles, identities and high-resolution structures of these components remain unknown. Here, by determining a near-atomic-resolution, five-fold averaged structure of Paramecium bursaria chlorella virus 1, we unexpectedly found the viral capsid possesses up to five major capsid protein variants and a penton protein variant. These variants create varied capsid microenvironments for the associations of fibers, a vesicle, and previously unresolved minor capsid proteins. Our structure reveals the identities and atomic models of the capsid components that do not obey the overall icosahedral symmetry and leads to a model for how these components are assembled and initiate capsid assembly, and this model might be applicable to many other giant viruses.
External linksNat Commun / PubMed:36309542 / PubMed Central
MethodsEM (single particle)
Resolution3.8 - 4.9 Å
Structure data

EMDB-34438, PDB-8h2i:
Near-atomic structure of five-fold averaged PBCV-1 capsid
Method: EM (single particle) / Resolution: 3.8 Å

EMDB-34439: Five-fold averaged cryo-EM reconstruction of PBCV-1 before applying the "block-based" reconstruction method
Method: EM (single particle) / Resolution: 4.9 Å

EMDB-35326: Cryo-EM reconstruction of PBCV-1 capsid block 1
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35490: Cryo-EM reconstruction of PBCV-1 capsid block 2
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35585: Cryo-EM reconstruction of PBCV-1 capsid block 3
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35586: Cryo-EM reconstruction of PBCV-1 capsid block 4
Method: EM (single particle) / Resolution: 3.8 Å

EMDB-35589: Cryo-EM reconstruction of PBCV-1 capsid block 5
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35593: Cryo-EM reconstruction of PBCV-1 capsid block 6
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35594: Cryo-EM reconstruction of PBCV-1 capsid block 8
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35644: Cryo-EM reconstruction of PBCV-1 capsid block 9
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35645: Cryo-EM reconstruction of PBCV-1 capsid block 7
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35646: Cryo-EM reconstruction of PBCV-1 capsid block 10
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35647: Cryo-EM reconstruction of PBCV-1 capsid block 11
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35648: Cryo-EM reconstruction of PBCV-1 capsid block 12
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35650: Cryo-EM reconstruction of PBCV-1 capsid block 13
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35656: Cryo-EM reconstruction of PBCV-1 capsid block 14
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35659: Cryo-EM reconstruction of PBCV-1 capsid block 15
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35695: Cryo-EM reconstruction of PBCV-1 capsid block 16
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35954: Cryo-EM reconstruction of PBCV-1 capsid block 17
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35955: Cryo-EM reconstruction of PBCV-1 capsid block 18
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35956: Cryo-EM reconstruction of PBCV-1 capsid block 19
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35957: Cryo-EM reconstruction of PBCV-1 capsid block 20
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35958: Cryo-EM reconstruction of PBCV-1 capsid block 21
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-35959: Cryo-EM reconstruction of PBCV-1 capsid block 22
Method: EM (single particle) / Resolution: 3.8 Å

EMDB-35960: Cryo-EM reconstruction of PBCV-1 capsid block 23
Method: EM (single particle) / Resolution: 3.8 Å

Source
  • paramecium bursaria chlorella virus 1
KeywordsVIRAL PROTEIN / giant virus / nucleocytoplasmic large DNA viruses (NCLDVs) / viral assembly / Paramecium bursaria chlorella virus 1 (PBCV-1) / chlorovirus / major capsid protein / minor capsid protein / VIRUS

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