8HR7

Structure of RdrA-RdrB complex

  • Classification: IMMUNE SYSTEM
  • Organism(s): Escherichia coli
  • Expression System: Escherichia coli
  • Mutation(s): No 

  • Deposited: 2022-12-15 Released: 2023-02-01 
  • Deposition Author(s): Gao, Y.
  • Funding Organization(s): National Natural Science Foundation of China (NSFC)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.96 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Molecular basis of RADAR anti-phage supramolecular assemblies.

Gao, Y.Luo, X.Li, P.Li, Z.Ye, F.Liu, S.Gao, P.

(2023) Cell 186: 999-1012.e20

  • DOI: https://doi.org/10.1016/j.cell.2023.01.026
  • Primary Citation of Related Structures:  
    8HR7, 8HR8, 8HR9, 8HRA, 8HRB, 8HRC

  • PubMed Abstract: 

    Adenosine-to-inosine RNA editing has been proposed to be involved in a bacterial anti-phage defense system called RADAR. RADAR contains an adenosine triphosphatase (RdrA) and an adenosine deaminase (RdrB). Here, we report cryo-EM structures of RdrA, RdrB, and currently identified RdrA-RdrB complexes in the presence or absence of RNA and ATP. RdrB assembles into a dodecameric cage with catalytic pockets facing outward, while RdrA adopts both autoinhibited tetradecameric and activation-competent heptameric rings. Structural and functional data suggest a model in which RNA is loaded through the bottom section of the RdrA ring and translocated along its inner channel, a process likely coupled with ATP-binding status. Intriguingly, up to twelve RdrA rings can dock one RdrB cage with precise alignments between deaminase catalytic pockets and RNA-translocation channels, indicative of enzymatic coupling of RNA translocation and deamination. Our data uncover an interesting mechanism of enzymatic coupling and anti-phage defense through supramolecular assemblies.


  • Organizational Affiliation

    CAS Key Laboratory of Infection and Immunity, National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Archaeal ATPase947Escherichia coliMutation(s): 0 
Gene Names: AW119_27900
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Adenosine deaminase799Escherichia coliMutation(s): 0 
Gene Names: AW119_27895
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.96 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Released Date: 2023-02-01 
  • Deposition Author(s): Gao, Y.

Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China32100984

Revision History  (Full details and data files)

  • Version 1.0: 2023-02-01
    Type: Initial release
  • Version 1.1: 2023-08-16
    Changes: Data collection, Database references