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-Structure paper
| タイトル | Polymerase trapping as the mechanism of H5 highly pathogenic avian influenza virus genesis. |
|---|---|
| ジャーナル・号・ページ | Science, Vol. 391, Issue 6790, Page eadr6632, Year 2026 |
| 掲載日 | 2026年3月12日 |
著者 | Mathis Funk / Monique I Spronken / Roy M Hutchinson / Benoit Arragain / Pauline Juyoux / Theo M Bestebroer / Anja C M de Bruin / Alexander P Gultyaev / Ron A M Fouchier / Stephen Cusack / Aartjan J W Te Velthuis / Mathilde Richard / ![]() |
| PubMed 要旨 | Highly pathogenic avian influenza viruses (HPAIVs) derive from H5 and H7 low pathogenic avian influenza viruses (LPAIVs). Although insertion of a furin-cleavable multibasic cleavage site (MBCS) in ...Highly pathogenic avian influenza viruses (HPAIVs) derive from H5 and H7 low pathogenic avian influenza viruses (LPAIVs). Although insertion of a furin-cleavable multibasic cleavage site (MBCS) in the hemagglutinin gene was identified decades ago as the genetic basis for the LPAIV-to-HPAIV transition, the mechanisms underlying the occurrence of insertion are unknown. Here, we show that transient H5 RNA structures, predicted to trap the influenza virus polymerase on purine-rich sequences, drive nucleotide insertions, providing empirical evidence of RNA structure involvement in MBCS acquisition. Introduction of H5-like sequences and structures into an H6 hemagglutinin resulted in MBCS-yielding insertions. Our results show that nucleotide insertions that underlie H5 HPAIV emergence result from an RNA structure-driven diversity-generating mechanism, which could also occur in other RNA viruses. |
リンク | Science / PubMed:41818353 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 1.99 - 2.15 Å |
| 構造データ | EMDB-53876, PDB-9raf: EMDB-53877, PDB-9rag: |
| 化合物 | ![]() ChemComp-MG: ![]() ChemComp-HOH: ![]() ChemComp-POP: |
| 由来 |
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キーワード | VIRAL PROTEIN / Influenza polymerase |
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influenza a virus (a/zhejiang/dtid-zju01/2013(h7n9)) (A型インフルエンザウイルス)
homo sapiens (ヒト)
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