6B47

Cryo-EM structure of Type I-F CRISPR crRNA-guided Csy surveillance complex with bound anti-CRISPR protein AcrF2


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 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: 10.1016/j.cell.2017.09.006
  • Primary Citation of Related Structures:  
    6ANV, 6ANW, 6B48, 6B45, 6B44, 6B47, 6B46

  • 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 ...

    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; Center for Molecular Microscopy, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA. Electronic address: subramas@mail.nih.gov.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CRISPR-associated protein Csy1A436Pseudomonas aeruginosa UCBPP-PA14Mutation(s): 0 
Gene Names: csy1PA14_33330
UniProt
Find proteins for Q02ML9 (Pseudomonas aeruginosa (strain UCBPP-PA14))
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
CRISPR-associated protein Csy2B329Pseudomonas aeruginosa UCBPP-PA14Mutation(s): 0 
Gene Names: csy2PA14_33320
UniProt
Find proteins for Q02MM0 (Pseudomonas aeruginosa (strain UCBPP-PA14))
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
CRISPR-associated protein Csy3C, D, E, F, G, H344Pseudomonas aeruginosa UCBPP-PA14Mutation(s): 0 
Gene Names: csy3csy1-3PA14_33310
UniProt
Find proteins for Q02MM1 (Pseudomonas aeruginosa (strain UCBPP-PA14))
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Anti-CRISPR protein AcrF2I [auth K]92Pseudomonas virus D3112Mutation(s): 0 
Gene Names: orf30
UniProt
Find proteins for Q6TM72 (Pseudomonas phage D3112)
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
CRISPR-associated endonuclease Cas6/Csy4J [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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  • Reference Sequence
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Entity ID: 6
MoleculeChainsLengthOrganismImage
Pseudomonas aeruginosa strain SMC4485 CRISPR repeat sequenceK [auth M]60Pseudomonas aeruginosa
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-10-18
    Type: Initial release