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-Structure paper
タイトル | Pre-initiation and elongation structures of full-length La Crosse virus polymerase reveal functionally important conformational changes. |
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ジャーナル・号・ページ | Nat Commun, Vol. 11, Issue 1, Page 3590, Year 2020 |
掲載日 | 2020年7月17日 |
著者 | Benoît Arragain / Grégory Effantin / Piotr Gerlach / Juan Reguera / Guy Schoehn / Stephen Cusack / Hélène Malet / |
PubMed 要旨 | Bunyavirales is an order of segmented negative-strand RNA viruses comprising several life-threatening pathogens against which no effective treatment is currently available. Replication and ...Bunyavirales is an order of segmented negative-strand RNA viruses comprising several life-threatening pathogens against which no effective treatment is currently available. Replication and transcription of the RNA genome constitute essential processes performed by the virally encoded multi-domain RNA-dependent RNA polymerase. Here, we describe the complete high-resolution cryo-EM structure of La Crosse virus polymerase. It reveals the presence of key protruding C-terminal domains, notably the cap-binding domain, which undergoes large movements related to its role in transcription initiation, and a zinc-binding domain that displays a fold not previously observed. We capture the polymerase structure at pre-initiation and elongation states, uncovering the coordinated movement of the priming loop, mid-thumb ring linker and lid domain required for the establishment of a ten-base-pair template-product RNA duplex before strand separation into respective exit tunnels. These structural details and the observed dynamics of key functional elements will be instrumental for structure-based development of polymerase inhibitors. |
リンク | Nat Commun / PubMed:32681014 / PubMed Central |
手法 | EM (単粒子) / X線回折 |
解像度 | 3.02 - 3.961 Å |
構造データ | EMDB-11093: Cryo-EM map of La Crosse virus polymerase at pre-initiation stage EMDB-11095: EMDB-11107: EMDB-11118, PDB-6z8k: PDB-6z6b: |
化合物 | ChemComp-ZN: ChemComp-MG: |
由来 |
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キーワード | VIRAL PROTEIN / RNA-dependent RNA polymerase / REPLICATION / viral polymerase / transcription / polymerase / La Crosse virus |