1QWX | pdb_00001qwx

Crystal Structure of a Staphylococcal Inhibitor/Chaperone

• PDB DOI: https://doi.org/10.2210/pdb1QWX/pdb

• Classification: CHAPERONE
• Organism(s): Staphylococcus aureus subsp. aureus MW2
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2003-09-03 Released: 2004-02-10 
• Deposition Author(s): Brown, C.K., Gu, Z.-Y., Nickerson, N., McGavin, M.J., Ohlendorf, D.H., Earhart, C.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 
  0.221 (Depositor), 0.226 (DCC) 
• R-Value Work: 
  0.200 (Depositor), 0.206 (DCC) 
• R-Value Observed: 
  0.202 (Depositor) 

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 26.11 kDa 
• Atom Count: 2,069 
• Modeled Residue Count: 216 
• Deposited Residue Count: 218 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
cysteine protease	A, B	109	Staphylococcus aureus subsp. aureus MW2	Mutation(s): 0  Gene Names: SspC
UniProt
Find proteins for Q7A189 (Staphylococcus aureus (strain MW2)) Explore Q7A189  Go to UniProtKB:  Q7A189

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A, B	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free:  0.221 (Depositor), 0.226 (DCC) 
• R-Value Work:  0.200 (Depositor), 0.206 (DCC) 
• R-Value Observed: 0.202 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 34.44	α = 90
b = 77.91	β = 90
c = 101.99	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
SOLVE	phasing
MAID	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-02-10 
Deposition Author(s): Brown, C.K., Gu, Z.-Y., Nickerson, N., McGavin, M.J., Ohlendorf, D.H., Earhart, C.A.

Revision History  

• Version 1.0: 2004-02-10
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Advisory, Source and taxonomy, Version format compliance
• Version 1.3: 2014-03-12
  Changes: Other
• Version 1.4: 2025-03-26
  Changes: Data collection, Database references, Derived calculations, Structure summary