5O7H

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.221 

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:  5O6U

  • 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
167N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Cas7fv
C, D, E
315N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Cas5fv
F
336N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 1
MoleculeChainsLengthOrganism
crRNAA43Shewanella putrefaciens CN-32
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
B, C, D, E, F
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.221 
  • Space Group: I 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 157.002α = 90.00
b = 65.894β = 98.61
c = 160.682γ = 90.00
Software Package:
Software NamePurpose
CRANK2phasing
PHENIXrefinement
Aimlessdata scaling
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