7CXN

Architecture of a SARS-CoV-2 mini replication and transcription complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.84 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Architecture of a SARS-CoV-2 mini replication and transcription complex.

Yan, L.Zhang, Y.Ge, J.Zheng, L.Gao, Y.Wang, T.Jia, Z.Wang, H.Huang, Y.Li, M.Wang, Q.Rao, Z.Lou, Z.

(2020) Nat Commun 11: 5874-5874

  • DOI: https://doi.org/10.1038/s41467-020-19770-1
  • Primary Citation of Related Structures:  
    7CXM, 7CXN

  • PubMed Abstract: 

    Non-structural proteins (nsp) constitute the SARS-CoV-2 replication and transcription complex (RTC) to play a pivotal role in the virus life cycle. Here we determine the atomic structure of a SARS-CoV-2 mini RTC, assembled by viral RNA-dependent RNA polymerase (RdRp, nsp12) with a template-primer RNA, nsp7 and nsp8, and two helicase molecules (nsp13-1 and nsp13-2), by cryo-electron microscopy. Two groups of mini RTCs with different conformations of nsp13-1 are identified. In both of them, nsp13-1 stabilizes overall architecture of the mini RTC by contacting with nsp13-2, which anchors the 5'-extension of RNA template, as well as interacting with nsp7-nsp8-nsp12-RNA. Orientation shifts of nsp13-1 results in its variable interactions with other components in two forms of mini RTC. The mutations on nsp13-1:nsp12 and nsp13-1:nsp13-2 interfaces prohibit the enhancement of helicase activity achieved by mini RTCs. These results provide an insight into how helicase couples with polymerase to facilitate its function in virus replication and transcription.


  • Organizational Affiliation

    MOE Key Laboratory of Protein Science, School of Medicine, Tsinghua University, Beijing, China.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
RNA-directed RNA polymerase942Severe acute respiratory syndrome coronavirus 2Mutation(s): 1 
Gene Names: rep1a-1b
EC: 2.7.7.48
UniProt
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UniProt GroupP0DTD1
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Non-structural protein 8
B, D
198Severe acute respiratory syndrome coronavirus 2Mutation(s): 0 
Gene Names: rep1a-1b
UniProt
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UniProt GroupP0DTD1
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Non-structural protein 783Severe acute respiratory syndrome coronavirus 2Mutation(s): 0 
Gene Names: rep1a-1b
UniProt
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UniProt GroupP0DTD1
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
HelicaseH [auth F],
I [auth E]
601Severe acute respiratory syndrome coronavirus 2Mutation(s): 0 
Gene Names: rep1a-1b
EC: 3.6.4.12 (PDB Primary Data), 3.6.4.13 (PDB Primary Data)
UniProt
Find proteins for P0DTD1 (Severe acute respiratory syndrome coronavirus 2)
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UniProt GroupP0DTD1
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Entity ID: 4
MoleculeChains LengthOrganismImage
Primer RNAE [auth I]25Severe acute respiratory syndrome coronavirus 2
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Entity ID: 5
MoleculeChains LengthOrganismImage
Template RNAF [auth J]58Severe acute respiratory syndrome coronavirus 2
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Entity ID: 6
MoleculeChains LengthOrganismImage
RNA (5'-R(P*UP*UP*UP*UP*UP*U)-3')G [auth L]6Severe acute respiratory syndrome coronavirus 2
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.84 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Ministry of Science and Technology (MoST, China)China2017YFC0840300

Revision History  (Full details and data files)

  • Version 1.0: 2020-11-04
    Type: Initial release
  • Version 1.1: 2020-12-02
    Changes: Database references
  • Version 1.2: 2021-03-10
    Changes: Structure summary