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TitleNear-atomic architecture of Singapore grouper iridovirus and implications for giant virus assembly.
Journal, issue, pagesNat Commun, Vol. 14, Issue 1, Page 2050, Year 2023
Publish dateApr 12, 2023
AuthorsZhennan Zhao / Youhua Huang / Congcong Liu / Dongjie Zhu / Shuaixin Gao / Sheng Liu / Ruchao Peng / Ya Zhang / Xiaohong Huang / Jianxun Qi / Catherine C L Wong / Xinzheng Zhang / Peiyi Wang / Qiwei Qin / George F Gao /
PubMed AbstractSingapore grouper iridovirus (SGIV), one of the nucleocytoviricota viruses (NCVs), is a highly pathogenic iridovirid. SGIV infection results in massive economic losses to the aquaculture industry and ...Singapore grouper iridovirus (SGIV), one of the nucleocytoviricota viruses (NCVs), is a highly pathogenic iridovirid. SGIV infection results in massive economic losses to the aquaculture industry and significantly threatens global biodiversity. In recent years, high morbidity and mortality in aquatic animals have been caused by iridovirid infections worldwide. Effective control and prevention strategies are urgently needed. Here, we present a near-atomic architecture of the SGIV capsid and identify eight types of capsid proteins. The viral inner membrane-integrated anchor protein colocalizes with the endoplasmic reticulum (ER), supporting the hypothesis that the biogenesis of the inner membrane is associated with the ER. Additionally, immunofluorescence assays indicate minor capsid proteins (mCPs) could form various building blocks with major capsid proteins (MCPs) before the formation of a viral factory (VF). These results expand our understanding of the capsid assembly of NCVs and provide more targets for vaccine and drug design to fight iridovirid infections.
External linksNat Commun / PubMed:37041173 / PubMed Central
MethodsEM (single particle)
Resolution3.4 - 9.0 Å
Structure data

EMDB-34227: Cryo-EM structure of Singapore Grouper Iridovirus capsid block 1
Method: EM (single particle) / Resolution: 3.42 Å

EMDB-34229: Cryo-EM structure of Singapore Grouper Iridovirus capsid block 4
Method: EM (single particle) / Resolution: 3.51 Å

EMDB-34230: Cryo-EM structure of Singapore Grouper Iridovirus capsid block 2
Method: EM (single particle) / Resolution: 3.4 Å

EMDB-34235: Cryo-EM structure of Singapore Grouper Iridovirus capsid block 3
Method: EM (single particle) / Resolution: 3.42 Å

EMDB-34236: Cryo-EM structure of Singapore Grouper Iridovirus capsid block 5
Method: EM (single particle) / Resolution: 3.51 Å

EMDB-34251: Singapore Grouper Iridovirus
Method: EM (single particle) / Resolution: 9.0 Å

34815

8hif

EMDB-34815, PDB-8hif:
One asymmetric unit of Singapore grouper iridovirus capsid
Method: EM (single particle) / Resolution: 3.5 Å

Source
  • singapore grouper iridovirus
KeywordsVIRAL PROTEIN / Singapore grouper iridovirus / capsid proteins

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