6VRB

Cryo-EM structure of AcrVIA1-Cas13(crRNA) complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.00 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

A phage-encoded anti-CRISPR enables complete evasion of type VI-A CRISPR-Cas immunity.

Meeske, A.J.Jia, N.Cassel, A.K.Kozlova, A.Liao, J.Wiedmann, M.Patel, D.J.Marraffini, L.A.

(2020) Science 369: 54-59

  • DOI: https://doi.org/10.1126/science.abb6151
  • Primary Citation of Related Structures:  
    6VRB, 6VRC

  • PubMed Abstract: 

    The CRISPR RNA (crRNA)-guided nuclease Cas13 recognizes complementary viral transcripts to trigger the degradation of both host and viral RNA during the type VI CRISPR-Cas antiviral response. However, how viruses can counteract this immunity is not known. We describe a listeriaphage (ϕLS46) encoding an anti-CRISPR protein (AcrVIA1) that inactivates the type VI-A CRISPR system of Listeria seeligeri Using genetics, biochemistry, and structural biology, we found that AcrVIA1 interacts with the guide-exposed face of Cas13a, preventing access to the target RNA and the conformational changes required for nuclease activation. Unlike inhibitors of DNA-cleaving Cas nucleases, which cause limited immunosuppression and require multiple infections to bypass CRISPR defenses, a single dose of AcrVIA1 delivered by an individual virion completely dismantles type VI-A CRISPR-mediated immunity.


  • Organizational Affiliation

    Laboratory of Bacteriology, The Rockefeller University, New York, NY 10065, USA.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
CRISPR-associated endoribonuclease Cas13aB [auth A]1,087Listeria seeligeri serovar 1/2b str. SLCC3954Mutation(s): 0 
Gene Names: cas13c2c2lse_1149
EC: 3.1
UniProt
Find proteins for P0DPB8 (Listeria seeligeri serovar 1/2b (strain ATCC 35967 / DSM 20751 / CCM 3970 / CCUG 15530 / CIP 100100 / LMG 11386 / NCTC 11856 / SLCC 3954 / 1120))
Explore P0DPB8 
Go to UniProtKB:  P0DPB8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DPB8
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
AcrVIA1229Listeria seeligeriMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Find similar nucleic acids by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains LengthOrganismImage
RNA (52-MER)A [auth B]52Listeria seeligeri serovar 1/2b str. SLCC3954
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-06-10
    Type: Initial release
  • Version 1.1: 2020-07-22
    Changes: Database references
  • Version 1.2: 2024-03-06
    Changes: Data collection, Database references