Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 53.93 kDa 
• Atom Count: 4,050 
• Modelled Residue Count: 401 
• Deposited Residue Count: 414 
• Unique protein chains: 1
• Unique nucleic acid chains: 1

 2XLK

Crystal structure of the Csy4-crRNA complex, orthorhombic form

• PDB DOI: 10.2210/pdb2XLK/pdb
• NDB: NA0752

• Classification: HYDROLASE/RNA
• Organism(s): Pseudomonas aeruginosa UCBPP-PA14
• Expression System: Escherichia coli BL21
• Mutation(s): Yes 


• Deposited: 2010-07-21 Released: 2010-09-22 
• Deposition Author(s): Haurwitz, R.E., Jinek, M., Wiedenheft, B., Zhou, K., Doudna, J.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.216 
• R-Value Work: 0.184 
• R-Value Observed: 0.186 

Literature

Sequence- and Structure-Specific RNA Processing by a Crispr Endonuclease.

Haurwitz, R.E., Jinek, M., Wiedenheft, B., Zhou, K., Doudna, J.A.

(2010) Science 329: 1355

• PubMed: 20829488 
• DOI: 10.1126/science.1192272
• Primary Citation of Related Structures:  
  2XLI, 2XLJ, 2XLK


• PubMed Abstract: 
  

Many bacteria and archaea contain clustered regularly interspaced short palindromic repeats (CRISPRs) that confer resistance to invasive genetic elements. Central to this immune system is the production of CRISPR-derived RNAs (crRNAs) after transcription of the CRISPR locus. Here, we identify the endoribonuclease (Csy4) responsible for CRISPR transcript (pre-crRNA) processing in Pseudomonas aeruginosa. A 1.8 angstrom crystal structure of Csy4 bound to its cognate RNA reveals that Csy4 makes sequence-specific interactions in the major groove of the crRNA repeat stem-loop. Together with electrostatic contacts to the phosphate backbone, these enable Csy4 to bind selectively and cleave pre-crRNAs using phylogenetically conserved serine and histidine residues in the active site. The RNA recognition mechanism identified here explains sequence- and structure-specific processing by a large family of CRISPR-specific endoribonucleases.

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Organizational Affiliation: 

Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CSY4 ENDORIBONUCLEASE	A, B	191	Pseudomonas aeruginosa UCBPP-PA14	Mutation(s): 1  Gene Names: cas6f, csy4, PA14_33300 EC: 3.1
UniProt
Find proteins for Q02MM2 (Pseudomonas aeruginosa (strain UCBPP-PA14)) Explore Q02MM2  Go to UniProtKB:  Q02MM2

Entity ID: 2
Molecule	Chains	Length	Organism	Image
5'-R(*CP*UP*GP*CP*CP*GP*UP*AP*UP*AP*GP*GP*CP*A*DG*C)-3'	C, D	16	Pseudomonas aeruginosa UCBPP-PA14

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.216 
• R-Value Work: 0.184 
• R-Value Observed: 0.186 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 40.06	α = 90
b = 78.91	β = 90
c = 145.94	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2010-09-22 
Deposition Author(s): Haurwitz, R.E., Jinek, M., Wiedenheft, B., Zhou, K., Doudna, J.A.

Revision History  

• Version 1.0: 2010-09-22
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance