7YG7 image
Entry Detail
PDB ID:
7YG7
EMDB ID:
Title:
Structure of the Spring Viraemia of Carp Virus ribonucleoprotein Complex
Biological Source:
Host Organism:
PDB Version:
Deposition Date:
2022-07-11
Release Date:
2023-03-15
Method Details:
Experimental Method:
Resolution:
3.70 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Nucleoprotein
Chain IDs:A, B, C, D, E, F, G, H, I, J, K
Chain Length:414
Number of Molecules:11
Biological Source:Sprivivirus cyprinus
Polymer Type:polyribonucleotide
Description:RNA (99-mer)
Chain IDs:L (auth: U)
Chain Length:99
Number of Molecules:1
Biological Source:Trichoplusia ni
Ligand Molecules
Primary Citation
Structure of the Spring Viraemia of Carp Virus Ribonucleoprotein Complex Reveals Its Assembly Mechanism and Application in Antiviral Drug Screening.
J.Virol. 97 e0182922 e0182922 (2023)
PMID: 36943056 DOI: 10.1128/jvi.01829-22

Abstact

Spring viremia of carp virus (SVCV) is a highly pathogenic Vesiculovirus infecting the common carp, yet neither a vaccine nor effective therapies are available to treat spring viremia of carp (SVC). Like all negative-sense viruses, SVCV contains an RNA genome that is encapsidated by the nucleoprotein (N) in the form of a ribonucleoprotein (RNP) complex, which serves as the template for viral replication and transcription. Here, the three-dimensional (3D) structure of SVCV RNP was resolved through cryo-electron microscopy (cryo-EM) at a resolution of 3.7 Å. RNP assembly was stabilized by N and C loops; RNA was wrapped in the groove between the N and C lobes with 9 nt nucleotide per protomer. Combined with mutational analysis, our results elucidated the mechanism of RNP formation. The RNA binding groove of SVCV N was used as a target for drug virtual screening, and it was found suramin had a good antiviral effect. This study provided insights into RNP assembly, and anti-SVCV drug screening was performed on the basis of this structure, providing a theoretical basis and efficient drug screening method for the prevention and treatment of SVC. IMPORTANCE Aquaculture accounts for about 70% of global aquatic products, and viral diseases severely harm the development of aquaculture industry. Spring viremia of carp virus (SVCV) is the pathogen causing highly contagious spring viremia of carp (SVC) disease in cyprinids, especially common carp (Cyprinus carpio), yet neither a vaccine nor effective therapies are available to treat this disease. In this study, we have elucidated the mechanism of SVCV ribonucleoprotein complex (RNP) formation by resolving the 3D structure of SVCV RNP and screened antiviral drugs based on the structure. It is found that suramin could competitively bind to the RNA binding groove and has good antiviral effects both in vivo and in vitro. Our study provides a template for rational drug discovery efforts to treat and prevent SVCV infections.

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