5KIX

Crystal structure of Staphylococcal nuclease variant Delta+PHS I92E at cryogenic temperature

• PDB DOI: https://doi.org/10.2210/pdb5KIX/pdb

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


• Deposited: 2016-06-17 Released: 2016-06-29 
• Deposition Author(s): Skerritt, L.A., Robinson, A.C., Schlessman, J.L., Garcia-Moreno E., B.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.223 
• R-Value Work: 0.183 
• R-Value Observed: 0.185 

Starting Model: experimental

Literature

Crystal structure of Staphylococcal nuclease variant Delta+PHS I92E at cryogenic temperature

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

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: 16.6 kDa 
• Atom Count: 1,194 
• Modelled 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 P00644 (Staphylococcus aureus) Explore P00644  Go to UniProtKB:  P00644

Small Molecules

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.223 
• R-Value Work: 0.183 
• R-Value Observed: 0.185 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 31.178	α = 90
b = 60.353	β = 93.52
c = 38.425	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
CrysalisPro	data scaling
PHASER	phasing
PDB_EXTRACT	data extraction
CrysalisPro	data reduction
Coot	model building

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2016-06-29 
Deposition Author(s): Skerritt, L.A., Robinson, A.C., Schlessman, J.L., Garcia-Moreno E., B.

---

Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM061597

Revision History  

• Version 1.0: 2016-06-29
  Type: Initial release
  
• Version 1.1: 2017-09-13
  Changes: Author supporting evidence, Derived calculations
• Version 1.2: 2019-12-25
  Changes: Author supporting evidence
• Version 1.3: 2023-09-27
  Changes: Data collection, Database references, Refinement description