Solution structure of anti-CRISPR AcrIF7

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 1000 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Structural and mechanistic insights into the CRISPR inhibition of AcrIF7.

Kim, I.Koo, J.An, S.Y.Hong, S.Ka, D.Kim, E.H.Bae, E.Suh, J.Y.

(2020) Nucleic Acids Res 48: 9959-9968

  • DOI: https://doi.org/10.1093/nar/gkaa690
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The CRISPR-Cas system provides adaptive immunity for bacteria and archaea to combat invading phages and plasmids. Phages evolved anti-CRISPR (Acr) proteins to neutralize the host CRISPR-Cas immune system as a counter-defense mechanism. AcrIF7 in Pseudomonas aeruginosa prophages strongly inhibits the type I-F CRISPR-Cas system. Here, we determined the solution structure of AcrIF7 and identified its target, Cas8f of the Csy complex. AcrIF7 adopts a novel β1β2α1α2β3 fold and interacts with the target DNA binding site of Cas8f. Notably, AcrIF7 competes with AcrIF2 for the same binding interface on Cas8f without common structural motifs. AcrIF7 binding to Cas8f is driven mainly by electrostatic interactions that require position-specific surface charges. Our findings suggest that Acrs of divergent origin may have acquired specificity to a common target through convergent evolution of their surface charge configurations.

  • Organizational Affiliation

    Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Korea.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
anti-CRIPSR AcrIF769Pseudomonas aeruginosaMutation(s): 0 
Gene Names: F3H14_03835
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 1000 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Rural Development AdministrationKorea, Republic OfPJ013181
National Research Foundation (NRF, Korea)Korea, Republic OfD39700
National Research Foundation (NRF, Korea)Korea, Republic OfBK21plus

Revision History  (Full details and data files)

  • Version 1.0: 2020-08-26
    Type: Initial release
  • Version 1.1: 2020-09-23
    Changes: Structure summary
  • Version 1.2: 2020-10-21
    Changes: Database references
  • Version 1.3: 2023-06-14
    Changes: Database references, Other