5O6U

Structure of the Cascade-I-Fv R-loop complex from Shewanella putrefaciens


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.252 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Variation of Type I-F CRISPR RNA Guided DNA Surveillance.

Pausch, P.Muller-Esparza, H.Gleditzsch, D.Altegoer, F.Randau, L.Bange, G.

(2017) Mol. Cell 67: 622-632.e4

  • DOI: 10.1016/j.molcel.2017.06.036
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • CRISPR-Cas systems are prokaryotic immune systems against invading nucleic acids. Type I CRISPR-Cas systems employ highly diverse, multi-subunit surveillance Cascade complexes that facilitate duplex formation between crRNA and complementary target DN ...

    CRISPR-Cas systems are prokaryotic immune systems against invading nucleic acids. Type I CRISPR-Cas systems employ highly diverse, multi-subunit surveillance Cascade complexes that facilitate duplex formation between crRNA and complementary target DNA for R-loop formation, retention, and DNA degradation by the subsequently recruited nuclease Cas3. Typically, the large subunit recognizes bona fide targets through the PAM (protospacer adjacent motif), and the small subunit guides the non-target DNA strand. Here, we present the Apo- and target-DNA-bound structures of the I-Fv (type I-F variant) Cascade lacking the small and large subunits. Large and small subunits are functionally replaced by the 5' terminal crRNA cap Cas5fv and the backbone protein Cas7fv, respectively. Cas5fv facilitates PAM recognition from the DNA major groove site, in contrast to all other described type I systems. Comparison of the type I-Fv Cascade with an anti-CRISPR protein-bound I-F Cascade reveals that the type I-Fv structure differs substantially at known anti-CRISPR protein target sites and might therefore be resistant to viral Cascade interception.


    Organizational Affiliation

    LOEWE Center for Synthetic Microbiology (Synmikro) and Faculty of Chemistry, Philipps-University-Marburg, Hans-Meerwein-Strasse C07, 35043 Marburg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CRISPR-associated protein, Csy4 family
B
182Shewanella putrefaciens (strain CN-32 / ATCC BAA-453)Mutation(s): 0 
Find proteins for A4Y6G3 (Shewanella putrefaciens (strain CN-32 / ATCC BAA-453))
Go to UniProtKB:  A4Y6G3
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Uncharacterized protein
C, D, E
315Shewanella putrefaciens (strain CN-32 / ATCC BAA-453)Mutation(s): 0 
Find proteins for A4Y6G1 (Shewanella putrefaciens (strain CN-32 / ATCC BAA-453))
Go to UniProtKB:  A4Y6G1
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Uncharacterized protein
F
336Shewanella putrefaciens (strain CN-32 / ATCC BAA-453)Mutation(s): 0 
Find proteins for A4Y6G2 (Shewanella putrefaciens (strain CN-32 / ATCC BAA-453))
Go to UniProtKB:  A4Y6G2
Entity ID: 1
MoleculeChainsLengthOrganism
crRNAA43Shewanella putrefaciens CN-32
Entity ID: 5
MoleculeChainsLengthOrganism
non-target DNAH21Shewanella putrefaciens CN-32
Entity ID: 6
MoleculeChainsLengthOrganism
target DNAI27Shewanella putrefaciens CN-32
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.252 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 143.316α = 90.00
b = 143.316β = 90.00
c = 172.698γ = 120.00
Software Package:
Software NamePurpose
Aimlessdata scaling
PHASERphasing
PHENIXrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-08-16
    Type: Initial release
  • Version 1.1: 2017-08-30
    Type: Database references