3QOJ | pdb_00003qoj

Cryogenic structure of Staphylococcal nuclease variant D+PHS/V23K

• PDB DOI: https://doi.org/10.2210/pdb3QOJ/pdb

• Classification: HYDROLASE
• Organism(s): Staphylococcus aureus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2011-02-10 Released: 2011-03-16 
• Deposition Author(s): Robinson, A.C., Schlessman, J.L., Heroux, A., Garcia-Moreno E., B.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 
  0.228 (Depositor), 0.229 (DCC) 
• R-Value Work: 
  0.187 (Depositor), 0.186 (DCC) 
• R-Value Observed: 
  0.189 (Depositor) 

Starting Model: experimental

Literature

Determinants of pKa values of internal ionizable groups: properties of ion pairs in the protein core

Robinson, A.C., Schlessman, J.L., Heroux, A., Garcia-Moreno E., B., Castaneda, C.A.

To be published.

Biological Assembly 1  

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

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

Macromolecule Content 

• Total Structure Weight: 16.62 kDa 
• Atom Count: 1,182 
• Modeled Residue Count: 129 
• Deposited Residue Count: 143 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Thermonuclease	A	143	Staphylococcus aureus	Mutation(s): 6  Gene Names: nuc EC: 3.1.31.1
UniProt
Find proteins for Q8NXI6 (Staphylococcus aureus (strain MW2)) Explore Q8NXI6  Go to UniProtKB:  Q8NXI6

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
THP	C [auth A]	THYMIDINE-3',5'-DIPHOSPHATE C10 H16 N2 O11 P2 CSNCBOPUCJOHLS-XLPZGREQSA-N
CA	B [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free:  0.228 (Depositor), 0.229 (DCC) 
• R-Value Work:  0.187 (Depositor), 0.186 (DCC) 
• R-Value Observed: 0.189 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 31.138	α = 90
b = 60.351	β = 93.86
c = 38.156	γ = 90

Software Package:

Software Name	Purpose
CBASS	data collection
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2011-03-16 
Deposition Author(s): Robinson, A.C., Schlessman, J.L., Heroux, A., Garcia-Moreno E., B.

Revision History  

• Version 1.0: 2011-03-16
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2023-09-13
  Changes: Data collection, Database references, Derived calculations, Refinement description