7ECW

The Csy-AcrIF14-dsDNA complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 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

Insights into the dual functions of AcrIF14 during the inhibition of type I-F CRISPR-Cas surveillance complex.

Liu, X.Zhang, L.Xiu, Y.Gao, T.Huang, L.Xie, Y.Yang, L.Wang, W.Wang, P.Zhang, Y.Yang, M.Feng, Y.

(2021) Nucleic Acids Res 49: 10178-10191

  • DOI: https://doi.org/10.1093/nar/gkab738
  • Primary Citation of Related Structures:  
    7DU0, 7ECV, 7ECW

  • PubMed Abstract: 

    CRISPR-Cas systems are bacterial adaptive immune systems, and phages counteract these systems using many approaches such as producing anti-CRISPR (Acr) proteins. Here, we report the structures of both AcrIF14 and its complex with the crRNA-guided surveillance (Csy) complex. Our study demonstrates that apart from interacting with the Csy complex to block the hybridization of target DNA to the crRNA, AcrIF14 also endows the Csy complex with the ability to interact with non-sequence-specific dsDNA as AcrIF9 does. Further structural studies of the Csy-AcrIF14-dsDNA complex and biochemical studies uncover that the PAM recognition loop of the Cas8f subunit of the Csy complex and electropositive patches within the N-terminal domain of AcrIF14 are essential for the non-sequence-specific dsDNA binding to the Csy-AcrIF14 complex, which is different from the mechanism of AcrIF9. Our findings highlight the prevalence of Acr-induced non-specific DNA binding and shed light on future studies into the mechanisms of such Acr proteins.


  • Organizational Affiliation

    Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing Key Laboratory of Bioprocess, State Key Laboratory of Chemical Resource Engineering, College of Life Science and Technology, Beijing University of Chemical Technology, 100029 Beijing, China.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Type I-F CRISPR-associated protein Csy1434Pseudomonas aeruginosaMutation(s): 0 
Gene Names: csy1ALP65_00954IPC1505_30690
UniProt
Find proteins for A0A3A8DDU9 (Pseudomonas aeruginosa)
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Go to UniProtKB:  A0A3A8DDU9
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UniProt GroupA0A3A8DDU9
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
CRISPR type I-F/YPEST-associated protein Csy2327Pseudomonas aeruginosaMutation(s): 0 
Gene Names: csy2ALP65_00953EQH76_13810NCTC13437_01526PACL_0128
UniProt
Find proteins for Q02MM0 (Pseudomonas aeruginosa (strain UCBPP-PA14))
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UniProt GroupQ02MM0
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
CRISPR-associated protein Csy3
C, D, E, F, G
C, D, E, F, G, H
342Pseudomonas aeruginosaMutation(s): 0 
Gene Names: IPC1505_30680IPC36_28835
UniProt
Find proteins for Q02MM1 (Pseudomonas aeruginosa (strain UCBPP-PA14))
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UniProt GroupQ02MM1
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
AcrIF14
I, J
124Moraxella phage Mcat5Mutation(s): 0 
UniProt
Find proteins for A0A0R6PCL0 (Moraxella phage Mcat5)
Explore A0A0R6PCL0 
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UniProt GroupA0A0R6PCL0
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Entity ID: 5
MoleculeChains LengthOrganismImage
RNA (60-MER)K [auth M]60Pseudomonas aeruginosa
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Entity ID: 6
MoleculeChains LengthOrganismImage
54-MER DNAL [auth N]54Pseudomonas aeruginosa
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Entity ID: 7
MoleculeChains LengthOrganismImage
54-MER DNAM [auth O]54Pseudomonas aeruginosa
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Science Foundation (NSF, China)China31822012

Revision History  (Full details and data files)

  • Version 1.0: 2021-11-17
    Type: Initial release
  • Version 1.1: 2024-06-05
    Changes: Data collection