5UZ9

Cryo EM structure of anti-CRISPRs, AcrF1 and AcrF2, bound to type I-F crRNA-guided CRISPR surveillance complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.4 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

Structure Reveals Mechanisms of Viral Suppressors that Intercept a CRISPR RNA-Guided Surveillance Complex.

Chowdhury, S.Carter, J.Rollins, M.F.Golden, S.M.Jackson, R.N.Hoffmann, C.Nosaka, L.Bondy-Denomy, J.Maxwell, K.L.Davidson, A.R.Fischer, E.R.Lander, G.C.Wiedenheft, B.

(2017) Cell 169: 47-57.e11

  • DOI: 10.1016/j.cell.2017.03.012

  • PubMed Abstract: 
  • Genetic conflict between viruses and their hosts drives evolution and genetic innovation. Prokaryotes evolved CRISPR-mediated adaptive immune systems for protection from viral infection, and viruses have evolved diverse anti-CRISPR (Acr) proteins tha ...

    Genetic conflict between viruses and their hosts drives evolution and genetic innovation. Prokaryotes evolved CRISPR-mediated adaptive immune systems for protection from viral infection, and viruses have evolved diverse anti-CRISPR (Acr) proteins that subvert these immune systems. The adaptive immune system in Pseudomonas aeruginosa (type I-F) relies on a 350 kDa CRISPR RNA (crRNA)-guided surveillance complex (Csy complex) to bind foreign DNA and recruit a trans-acting nuclease for target degradation. Here, we report the cryo-electron microscopy (cryo-EM) structure of the Csy complex bound to two different Acr proteins, AcrF1 and AcrF2, at an average resolution of 3.4 Å. The structure explains the molecular mechanism for immune system suppression, and structure-guided mutations show that the Acr proteins bind to residues essential for crRNA-mediated detection of DNA. Collectively, these data provide a snapshot of an ongoing molecular arms race between viral suppressors and the immune system they target.


    Organizational Affiliation

    Department of Integrative Structural and Computational Biology, Scripps Research Institute, La Jolla, CA 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CRISPR-associated protein Csy1
A
434Pseudomonas aeruginosa (strain UCBPP-PA14)Mutation(s): 0 
Gene Names: csy1
Find proteins for Q02ML9 (Pseudomonas aeruginosa (strain UCBPP-PA14))
Go to UniProtKB:  Q02ML9
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CRISPR-associated protein Csy2
B
327Pseudomonas aeruginosa (strain UCBPP-PA14)Mutation(s): 0 
Gene Names: csy2
Find proteins for Q02MM0 (Pseudomonas aeruginosa (strain UCBPP-PA14))
Go to UniProtKB:  Q02MM0
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
CRISPR-associated protein Csy3
C, D, E, F, G, H
341Pseudomonas aeruginosa (strain UCBPP-PA14)Mutation(s): 0 
Gene Names: csy3 (csy1-3)
Find proteins for Q02MM1 (Pseudomonas aeruginosa (strain UCBPP-PA14))
Go to UniProtKB:  Q02MM1
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Anti-CRISPR protein Acr30-35
I, J
77Pseudomonas phage JBD30Mutation(s): 0 
Find proteins for L7P7M1 (Pseudomonas phage JBD30)
Go to UniProtKB:  L7P7M1
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
Anti-CRISPR protein 30
K
96Pseudomonas phage D3112Mutation(s): 0 
Gene Names: orf30
Find proteins for Q6TM72 (Pseudomonas phage D3112)
Go to UniProtKB:  Q6TM72
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
CRISPR-associated endonuclease Cas6/Csy4
L
189Pseudomonas aeruginosa (strain UCBPP-PA14)Mutation(s): 0 
Gene Names: cas6f (csy4)
EC: 3.1.-.-
Find proteins for Q02MM2 (Pseudomonas aeruginosa (strain UCBPP-PA14))
Go to UniProtKB:  Q02MM2
Entity ID: 7
MoleculeChainsLengthOrganism
CRISPR RNA (60-MER)M60Pseudomonas aeruginosa UCBPP-PA14
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.4 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesP20GM103500, P30GM110732-03, R01GM110270, R01GM108888, P20GM103474, F32GM108436, DP2EB020402, DP5OD021344
National Science Foundation (United States)United StatesEPS-110134
Canadian Institutes of Health ResearchCanadaMOP-130482, MOP-136845

Revision History 

  • Version 1.0: 2017-04-26
    Type: Initial release
  • Version 1.1: 2017-09-27
    Type: Author supporting evidence, Data collection
  • Version 1.2: 2018-07-18
    Type: Data collection, Experimental preparation