6B44

Cryo-EM structure of Type I-F CRISPR crRNA-guided Csy surveillance complex with bound target dsDNA


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 1.3 of the entry. See complete history


Literature

Cryo-EM Structures Reveal Mechanism and Inhibition of DNA Targeting by a CRISPR-Cas Surveillance Complex.

Guo, T.W.Bartesaghi, A.Yang, H.Falconieri, V.Rao, P.Merk, A.Eng, E.T.Raczkowski, A.M.Fox, T.Earl, L.A.Patel, D.J.Subramaniam, S.

(2017) Cell 171: 414-426.e12

  • DOI: https://doi.org/10.1016/j.cell.2017.09.006
  • Primary Citation of Related Structures:  
    6ANV, 6ANW, 6B44, 6B45, 6B46, 6B47, 6B48

  • PubMed Abstract: 

    Prokaryotic cells possess CRISPR-mediated adaptive immune systems that protect them from foreign genetic elements, such as invading viruses. A central element of this immune system is an RNA-guided surveillance complex capable of targeting non-self DNA or RNA for degradation in a sequence- and site-specific manner analogous to RNA interference. Although the complexes display considerable diversity in their composition and architecture, many basic mechanisms underlying target recognition and cleavage are highly conserved. Using cryoelectron microscopy (cryo-EM), we show that the binding of target double-stranded DNA (dsDNA) to a type I-F CRISPR system yersinia (Csy) surveillance complex leads to large quaternary and tertiary structural changes in the complex that are likely necessary in the pathway leading to target dsDNA degradation by a trans-acting helicase-nuclease. Comparison of the structure of the surveillance complex before and after dsDNA binding, or in complex with three virally encoded anti-CRISPR suppressors that inhibit dsDNA binding, reveals mechanistic details underlying target recognition and inhibition.


  • Organizational Affiliation

    Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CRISPR-associated protein Csy1436Pseudomonas aeruginosa UCBPP-PA14Mutation(s): 0 
Gene Names: csy1PA14_33330
UniProt
Find proteins for Q02ML9 (Pseudomonas aeruginosa (strain UCBPP-PA14))
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Go to UniProtKB:  Q02ML9
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UniProt GroupQ02ML9
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
CRISPR-associated protein Csy2329Pseudomonas aeruginosa UCBPP-PA14Mutation(s): 0 
Gene Names: csy2PA14_33320
UniProt
Find proteins for Q02MM0 (Pseudomonas aeruginosa (strain UCBPP-PA14))
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Go to UniProtKB:  Q02MM0
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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
344Pseudomonas aeruginosa UCBPP-PA14Mutation(s): 0 
Gene Names: csy3csy1-3PA14_33310
UniProt
Find proteins for Q02MM1 (Pseudomonas aeruginosa (strain UCBPP-PA14))
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UniProt GroupQ02MM1
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
CRISPR-associated endonuclease Cas6/Csy4I [auth L]189Pseudomonas aeruginosa UCBPP-PA14Mutation(s): 0 
Gene Names: cas6fcsy4PA14_33300
EC: 3.1
UniProt
Find proteins for Q02MM2 (Pseudomonas aeruginosa (strain UCBPP-PA14))
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Entity ID: 5
MoleculeChains LengthOrganismImage
Pseudomonas aeruginosa strain SMC4485 CRISPR repeat sequenceJ [auth M]60Pseudomonas aeruginosa
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Entity ID: 6
MoleculeChains LengthOrganismImage
Target DNA strand (41-MER)K [auth N]49synthetic construct
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Entity ID: 7
MoleculeChains LengthOrganismImage
Non-target DNA strand (5'-D(P*CP*AP*GP*TP*CP*AP*TP*CP*AP*CP*CP*AP*A)-3')L [auth O]27synthetic construct
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONFREALIGN9.11

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM103310

Revision History  (Full details and data files)

  • Version 1.0: 2017-10-18
    Type: Initial release
  • Version 1.1: 2017-12-06
    Changes: Author supporting evidence
  • Version 1.2: 2020-01-01
    Changes: Author supporting evidence
  • Version 1.3: 2024-03-13
    Changes: Data collection, Database references, Source and taxonomy