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Structural insight into RNA synthesis by influenza D polymerase.

Peng Q, Liu Y, Peng R, Wang M, Yang W, Song H, Chen Y, Liu S, Han M, Zhang X, Wang P, Yan J, Zhang B, Qi J, Deng T, Gao GF, Shi Y
Nat Microbiol 4 1750-1759 (2019)
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Cited: 40 times
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Abstract

The influenza virus polymerase uses capped RNA primers to initiate transcription, and a combination of terminal and internal de novo initiations for the two-step replication process by binding the conserved viral genomic RNA (vRNA) or complementary RNA (cRNA) promoter. Here, we determined the apo and promoter-bound influenza D polymerase structures using cryo-electron microscopy and found the polymerase has an evolutionarily conserved stable core structure with inherently flexible peripheral domains. Strikingly, two conformations (mode A and B) of the vRNA promoter were observed where the 3'-vRNA end can bind at two different sites, whereas the cRNA promoter only binds in the mode B conformation. Functional studies confirmed the critical role of the mode B conformation for vRNA synthesis via the intermediate cRNA but not for cRNA production, which is mainly regulated by the mode A conformation. Both conformations participate in the regulation of the transcription process. This work advances our understanding of the regulatory mechanisms for the synthesis of different RNA species by influenza virus polymerase and opens new opportunities for antiviral drug design.

Reviews - 6kup mentioned but not cited (1)

  1. Revisiting Viral RNA-Dependent RNA Polymerases: Insights from Recent Structural Studies. Ramaswamy K, Rashid M, Ramasamy S, Jayavelu T, Venkataraman S. Viruses 14 2200 (2022)


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Related citations provided by authors (1)

  1. Structural insight into RNA synthesis by influenza D polymerase.. Peng Q, Liu Y, Peng R, Wang M, Yang W, Song H, Chen Y, Liu S, Han M, Zhang X, Wang P, Yan J, Zhang B, Qi J, Deng T, Gao GF, Shi Y Nat Microbiol 4 1750-1759 (2019)

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