Structural snapshots of actively transcribing influenza polymerase.
Structural snapshots of actively transcribing influenza polymerase.
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DOI:
10.1038/s41594-019-0232-z
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发表时间:
2019-06
影响因子:
16.8
通讯作者:
Cusack S
中科院分区:
文献类型:
--
作者:
Kouba T;Drncová P;Cusack S
Influenza virus RNA-dependent RNA polymerase uses unique mechanisms to transcribe its single-stranded genomic vRNA into mRNA. The polymerase is initially bound to a promoter comprising the partially base-paired 3′ and 5′ extremities of the vRNA. A short, capped primer, ′cap-snatched′ from a nascent host polymerase II transcript, is directed towards the polymerase active site to initiate RNA synthesis. Here we present structural snapshots, determined by X-ray crystallography and cryo-electron microscopy, of actively initiating influenza polymerase as it transitions towards processive elongation. Unexpected conformational changes unblock the active site cavity to allow establishment of a nine base-pair template-product RNA duplex before the strands separate into distinct exit channels. Concomitantly, as the template translocates, the promoter base-pairs are broken and the template entry region is remodelled. These structures reveal new details of the influenza polymerase active site that will help optimize nucleoside analogs or other compounds that directly inhibit viral RNA synthesis.
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影响因子:
3.8
作者:
Klumpp, K;Ford, MJ;Ruigrok, RWH
通讯作者:
Ruigrok, RWH
DOI:
10.2183/pjab.93.027
发表时间:
2017
期刊:
Proceedings of the Japan Academy. Series B, Physical and biological sciences
影响因子:
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Furuta Y;Komeno T;Nakamura T
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Nakamura T
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
DOI:
10.1038/nrmicro3367
发表时间:
2015-01
期刊:
Nature reviews. Microbiology
影响因子:
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作者:
Eisfeld AJ;Neumann G;Kawaoka Y
通讯作者:
Kawaoka Y
DOI:
10.1107/s2059798318006551
发表时间:
2018-06-01
期刊:
Acta crystallographica. Section D, Structural biology
影响因子:
--
作者:
Afonine PV;Poon BK;Read RJ;Sobolev OV;Terwilliger TC;Urzhumtsev A;Adams PD
通讯作者:
Adams PD