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TitleCryo-EM structure of rotavirus B NSP2 reveals its unique tertiary architecture.
Journal, issue, pagesJ Virol, Vol. 98, Issue 3, Page e0166023, Year 2024
Publish dateMar 19, 2024
AuthorsSebastian Chamera / Krzysztof Wycisk / Mariusz Czarnocki-Cieciura / Marcin Nowotny /
PubMed AbstractRotavirus (RV) NSP2 is a multifunctional RNA chaperone that exhibits numerous activities that are essential for replication and viral genome packaging. We performed an analysis that highlighted a ...Rotavirus (RV) NSP2 is a multifunctional RNA chaperone that exhibits numerous activities that are essential for replication and viral genome packaging. We performed an analysis that highlighted a distant relationship of NSP2 from rotavirus B (RVB) to proteins from other human RVs. We solved a cryo-electron microscopy structure of RVB NSP2 that shows structural differences with corresponding proteins from other human RVs. Based on the structure, we identified amino acid residues that are involved in RNA interactions. Anisotropy titration experiments showed that these residues are important for nucleic acid binding. We also identified structural motifs that are conserved in all RV species. Collectively, our data complete the structural characterization of rotaviral NSP2 protein and demonstrate its structural diversity among RV species.IMPORTANCERotavirus B (RVB), also known as adult diarrhea rotavirus, has caused epidemics of severe diarrhea in China, India, and Bangladesh. Thousands of people are infected in a single RVB epidemic. However, information on this group of rotaviruses remains limited. As NSP2 is an essential protein in the viral life cycle, including its role in the formation of replication factories, it may be a target for future antiviral strategy against viruses with similar mechanisms.
External linksJ Virol / PubMed:38421167 / PubMed Central
MethodsEM (single particle)
Resolution3.8 Å
Structure data

17323

8p00

EMDB-17323, PDB-8p00:
Cryo-EM structure of Rotavirus B NSP2
Method: EM (single particle) / Resolution: 3.8 Å

Source
  • Rotavirus B
  • human rotavirus b strain cal-1
KeywordsVIRAL PROTEIN / Octamer / RNA binding / Rotavirus / RNA chaperone

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