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-Structure paper
タイトル | Asymmetric reconstruction of mammalian reovirus reveals interactions among RNA, transcriptional factor µ2 and capsid proteins. |
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ジャーナル・号・ページ | Nat Commun, Vol. 12, Issue 1, Page 4176, Year 2021 |
掲載日 | 2021年7月7日 |
著者 | Muchen Pan / Ana L Alvarez-Cabrera / Joon S Kang / Lihua Wang / Chunhai Fan / Z Hong Zhou / |
PubMed 要旨 | Mammalian reovirus (MRV) is the prototypical member of genus Orthoreovirus of family Reoviridae. However, lacking high-resolution structures of its RNA polymerase cofactor μ2 and infectious ...Mammalian reovirus (MRV) is the prototypical member of genus Orthoreovirus of family Reoviridae. However, lacking high-resolution structures of its RNA polymerase cofactor μ2 and infectious particle, limits understanding of molecular interactions among proteins and RNA, and their contributions to virion assembly and RNA transcription. Here, we report the 3.3 Å-resolution asymmetric reconstruction of transcribing MRV and in situ atomic models of its capsid proteins, the asymmetrically attached RNA-dependent RNA polymerase (RdRp) λ3, and RdRp-bound nucleoside triphosphatase μ2 with a unique RNA-binding domain. We reveal molecular interactions among virion proteins and genomic and messenger RNA. Polymerase complexes in three Spinoreovirinae subfamily members are organized with different pseudo-D symmetries to engage their highly diversified genomes. The above interactions and those between symmetry-mismatched receptor-binding σ1 trimers and RNA-capping λ2 pentamers balance competing needs of capsid assembly, external protein removal, and allosteric triggering of endogenous RNA transcription, before, during and after infection, respectively. |
リンク | Nat Commun / PubMed:34234134 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.3 - 8.6 Å |
構造データ | EMDB-31183, PDB-7elh: EMDB-31184, PDB-7ell: EMDB-31187: EMDB-31188: |
化合物 | ChemComp-PO4: ChemComp-MYR: |
由来 |
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キーワード | VIRAL PROTEIN/TRANSFERASE/RNA / asymmetric / mu2 / lambda3 / lambda1 / VIRUS / VIRAL PROTEIN-TRANSFERASE-RNA complex / VIRAL PROTEIN/TRANSFERASE / mammalian reovirus 3 / capping enzyme lambda2 / penetration protein mu1 / VIRAL PROTEIN-TRANSFERASE complex |