3QHQ

Structure of CRISPR-associated protein Csn2

• PDB DOI: https://doi.org/10.2210/pdb3QHQ/pdb

• Classification: TRANSFERASE
• Organism(s): Streptococcus agalactiae ATCC 13813
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2011-01-26 Released: 2012-02-01 
• Deposition Author(s): Ellinger, P., Arslan, Z., Wurm, R., Tschapek, B., Pfeffer, K., Wagner, R., Schmitt, L., Pul, U., Smits, S.H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.228 
• R-Value Work: 0.204 
• R-Value Observed: 0.205 

Literature

Structure of CRISPR-associated protein Csn2

Ellinger, P., Arslan, Z., Wurm, R., Tschapek, B., Pfeffer, K., Wagner, R., Schmitt, L., Pul, U., Smits, S.H.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

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

Macromolecule Content

• Total Structure Weight: 53.84 kDa 
• Atom Count: 3,889 
• Modelled Residue Count: 433 
• Deposited Residue Count: 458 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Sag0897 family CRISPR-associated protein	A, B	229	Streptococcus agalactiae ATCC 13813	Mutation(s): 0  Gene Names: HMPREF9171_1216 EC: 2.7.7.6
UniProt
Find proteins for E7S4M0 (Streptococcus agalactiae (strain ATCC 13813 / DSM 2134 / JCM 5671 / NCIMB 701348 / NCTC 8181)) Explore E7S4M0  Go to UniProtKB:  E7S4M0

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
EDO	E [auth A], I [auth B], J [auth B]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N
CA	C [auth A], D [auth A], F [auth B], G [auth B], H [auth B]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.228 
• R-Value Work: 0.204 
• R-Value Observed: 0.205 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 75.3	α = 90
b = 83.3	β = 109.4
c = 110.4	γ = 90

Software Package:

Software Name	Purpose
BEST	data collection
Auto-Rickshaw	phasing
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-02-01 
Deposition Author(s): Ellinger, P., Arslan, Z., Wurm, R., Tschapek, B., Pfeffer, K., Wagner, R., Schmitt, L., Pul, U., Smits, S.H.

Revision History  

• Version 1.0: 2012-02-01
  Type: Initial release
  
• Version 1.1: 2024-03-20
  Changes: Data collection, Database references, Derived calculations