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-Structure paper
| タイトル | Structure of the tilapia lake virus nucleoprotein bound to RNA. |
|---|---|
| ジャーナル・号・ページ | Nucleic Acids Res, Vol. 53, Issue 4, Year 2025 |
| 掲載日 | 2025年2月8日 |
著者 | Benoît Arragain / Martin Pelosse / Karine Huard / Stephen Cusack / ![]() |
| PubMed 要旨 | Tilapia Lake virus (TiLV) belongs to the Amnoonviridae family within the Articulavirales order of segmented negative-strand RNA viruses and is highly diverged from more familiar orthomyxoviruses, ...Tilapia Lake virus (TiLV) belongs to the Amnoonviridae family within the Articulavirales order of segmented negative-strand RNA viruses and is highly diverged from more familiar orthomyxoviruses, such as influenza. The viral nucleoprotein (NP), a key component of the replication machinery, packages the viral genome into protective ribonucleoprotein particles. Here we describe the electron cryo-microscopy (cryo-EM) structure of TiLV-NP bound to RNA within in vitro reconstituted, small ring-like, pseudo-symmetrical oligomers. Although TiLV-NP is considerably smaller than its influenza counterpart and unrelated in sequence, it maintains the same topology and domain organisation. This comprises a head and body domain between which is a positively charged groove, where single-stranded RNA binds. In addition, an oligomerisation loop inserts into a hydrophobic pocket in the neighbouring NP, the flexible hinges of which allow variable orientation of adjacent NPs. Focused cryo-EM maps unambiguously define the 5' to 3' direction of the bound RNA, confirmed by double stranded, A-form RNA regions that extrude out from some of the NP-NP interfaces. This is the first fully resolved description of how single-stranded and stem-loop RNA binds to an articulaviral NP assembly. Superposition with orthomyxoviral NPs suggest that the mode of RNA binding is likely similar across the Articulavirales order. |
リンク | Nucleic Acids Res / PubMed:39995042 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.9 - 3.68 Å |
| 構造データ | EMDB-52027, PDB-9hbr: EMDB-52028, PDB-9hbs: EMDB-52029, PDB-9hbt: EMDB-52030, PDB-9hbu: EMDB-52031, PDB-9hbv: EMDB-52032, PDB-9hbw: EMDB-52033, PDB-9hbx: EMDB-52034, PDB-9hby: EMDB-52035, PDB-9hbz: |
| 由来 |
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キーワード | RNA BINDING PROTEIN / Viral protein / nucleoprotein / oligomer |
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tilapia lake virus (ウイルス)
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