4QDL

Crystal structure of E.coli Cas1-Cas2 complex

• PDB DOI: https://doi.org/10.2210/pdb4QDL/pdb

• Classification: HYDROLASE
• Organism(s): Escherichia coli K-12
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2014-05-14 Released: 2014-05-28 
• Deposition Author(s): Tamulaitiene, G., Sinkunas, T., Silanskas, A., Gasiunas, G., Grazulis, S., Siksnys, V.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.261 
• R-Value Work: 0.227 
• R-Value Observed: 0.230 

Literature

Crystal structure of E.coli Cas1-Cas2 complex

Tamulaitiene, G., Sinkunas, T., Silanskas, A., Gasiunas, G., Grazulis, S., Siksnys, V.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 6-mer - A4B2 

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

Macromolecule Content

• Total Structure Weight: 156.43 kDa 
• Atom Count: 9,133 
• Modelled Residue Count: 1,227 
• Deposited Residue Count: 1,428 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CRISPR-associated endonuclease Cas1	A, B, C, D	305	Escherichia coli K-12	Mutation(s): 0  Gene Names: YGBT, CAS1, B2755, JW2725 EC: 3.1
UniProt
Find proteins for Q46896 (Escherichia coli (strain K12)) Explore Q46896  Go to UniProtKB:  Q46896

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
CRISPR-associated endoribonuclease Cas2	E, F	104	Escherichia coli K-12	Mutation(s): 0  Gene Names: YGBF, CAS2, B2754, JW5438 EC: 3.1
UniProt
Find proteins for P45956 (Escherichia coli (strain K12)) Explore P45956  Go to UniProtKB:  P45956

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.261 
• R-Value Work: 0.227 
• R-Value Observed: 0.230 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 92.764	α = 90
b = 127.402	β = 100.89
c = 96.64	γ = 90

Software Package:

Software Name	Purpose
SCALA	data scaling
MOLREP	phasing
PHENIX	refinement
PDB_EXTRACT	data extraction
MxCuBE	data collection
XDS	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-05-28 
Deposition Author(s): Tamulaitiene, G., Sinkunas, T., Silanskas, A., Gasiunas, G., Grazulis, S., Siksnys, V.

Revision History  

• Version 1.0: 2014-05-28
  Type: Initial release
  
• Version 1.1: 2018-03-07
  Changes: Data collection
• Version 1.2: 2023-09-20
  Changes: Data collection, Database references, Refinement description