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Title | Structure of the Vesicular Stomatitis Virus L Protein in Complex with Its Phosphoprotein Cofactor. |
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Journal, issue, pages | Cell Rep, Vol. 30, Issue 1, Page 53-60.e5, Year 2020 |
Publish date | Jan 7, 2020 |
Authors | Simon Jenni / Louis-Marie Bloyet / Ruben Diaz-Avalos / Bo Liang / Sean P J Whelan / Nikolaus Grigorieff / Stephen C Harrison / |
PubMed Abstract | The large (L) proteins of non-segmented, negative-strand RNA viruses are multifunctional enzymes that produce capped, methylated, and polyadenylated mRNA and replicate the viral genome. A ...The large (L) proteins of non-segmented, negative-strand RNA viruses are multifunctional enzymes that produce capped, methylated, and polyadenylated mRNA and replicate the viral genome. A phosphoprotein (P), required for efficient RNA-dependent RNA polymerization from the viral ribonucleoprotein (RNP) template, regulates the function and conformation of the L protein. We report the structure of vesicular stomatitis virus L in complex with its P cofactor determined by electron cryomicroscopy at 3.0 Å resolution, enabling us to visualize bound segments of P. The contacts of three P segments with multiple L domains show how P induces a closed, compact, initiation-competent conformation. Binding of P to L positions its N-terminal domain adjacent to a putative RNA exit channel for efficient encapsidation of newly synthesized genomes with the nucleoprotein and orients its C-terminal domain to interact with an RNP template. The model shows that a conserved tryptophan in the priming loop can support the initiating 5' nucleotide. |
External links | Cell Rep / PubMed:31914397 / PubMed Central |
Methods | EM (single particle) |
Resolution | 3.0 Å |
Structure data | EMDB-20614, PDB-6u1x: |
Chemicals | ChemComp-ZN: |
Source |
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Keywords | VIRAL PROTEIN / Vesicular stomatitis virus / RNA-dependent RNA polymerase / L protein / P protein / phosphoprotein / single particle analysis / transcription / replication / virus / viral / RdRp / PRNTase / nonsegmented negative-sense RNA viruses |