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TitleStructures of the promoter-bound respiratory syncytial virus polymerase.
Journal, issue, pagesNature, Vol. 625, Issue 7995, Page 611-617, Year 2024
Publish dateDec 20, 2023
AuthorsDongdong Cao / Yunrong Gao / Zhenhang Chen / Inesh Gooneratne / Claire Roesler / Cristopher Mera / Paul D'Cunha / Anna Antonova / Deepak Katta / Sarah Romanelli / Qi Wang / Samantha Rice / Wesley Lemons / Anita Ramanathan / Bo Liang /
PubMed AbstractThe respiratory syncytial virus (RSV) polymerase is a multifunctional RNA-dependent RNA polymerase composed of the large (L) protein and the phosphoprotein (P). It transcribes the RNA genome into ten ...The respiratory syncytial virus (RSV) polymerase is a multifunctional RNA-dependent RNA polymerase composed of the large (L) protein and the phosphoprotein (P). It transcribes the RNA genome into ten viral mRNAs and replicates full-length viral genomic and antigenomic RNAs. The RSV polymerase initiates RNA synthesis by binding to the conserved 3'-terminal RNA promoters of the genome or antigenome. However, the lack of a structure of the RSV polymerase bound to the RNA promoter has impeded the mechanistic understanding of RSV RNA synthesis. Here we report cryogenic electron microscopy structures of the RSV polymerase bound to its genomic and antigenomic viral RNA promoters, representing two of the first structures of an RNA-dependent RNA polymerase in complex with its RNA promoters in non-segmented negative-sense RNA viruses. The overall structures of the promoter-bound RSV polymerases are similar to that of the unbound (apo) polymerase. Our structures illustrate the interactions between the RSV polymerase and the RNA promoters and provide the structural basis for the initiation of RNA synthesis at positions 1 and 3 of the RSV promoters. These structures offer a deeper understanding of the pre-initiation state of the RSV polymerase and could aid in antiviral research against RSV.
External linksNature / PubMed:38123676 / PubMed Central
MethodsEM (single particle)
Resolution3.4 - 3.41 Å
Structure data

40641

8snx

EMDB-40641, PDB-8snx:
Cryo-EM structure of the respiratory syncytial virus polymerase (L:P) bound to the leader promoter
Method: EM (single particle) / Resolution: 3.4 Å

40642

8sny

EMDB-40642, PDB-8sny:
Cryo-EM structure of the respiratory syncytial virus polymerase (L:P) bound to the trailer complementary promoter
Method: EM (single particle) / Resolution: 3.41 Å

Source
  • respiratory syncytial virus a2
KeywordsVIRAL PROTEIN/RNA / Respiratory syncytial virus / RNA-dependent RNA polymerase / VIRAL PROTEIN-RNA complex

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