4C3V

Extensive counter-ion interactions with subtilisin in aqueous medium, no Cs soak

• PDB DOI: https://doi.org/10.2210/pdb4C3V/pdb

• Classification: HYDROLASE
• Organism(s): Bacillus licheniformis
• Mutation(s): Yes 


• Deposited: 2013-08-27 Released: 2014-08-20 
• Deposition Author(s): Cianci, M., Negroni, J., Helliwell, J.R., Halling, P.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.26 Å
• R-Value Free: 0.226 
• R-Value Work: 0.160 
• R-Value Observed: 0.163 

Starting Model: experimental

Literature

Extensive Counter-Ion Interactions Seen at the Surface of Subtilisin in an Aqueous Medium

Cianci, M., Negroni, J., Helliwell, J.R., Halling, P.J.

(2014) RSC Adv 

• DOI: https://doi.org/10.1039/C4RA06448H

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: 27.7 kDa 
• Atom Count: 2,059 
• Modelled Residue Count: 274 
• Deposited Residue Count: 274 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
SUBTILISIN CARLSBERG	A	274	Bacillus licheniformis	Mutation(s): 5  EC: 3.4.21.62
UniProt
Find proteins for P00780 (Bacillus licheniformis) Explore P00780  Go to UniProtKB:  P00780

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	B [auth A], C [auth A], D [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
CA	H [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N
NA	E [auth A], F [auth A], G [auth A]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.26 Å
• R-Value Free: 0.226 
• R-Value Work: 0.160 
• R-Value Observed: 0.163 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.891	α = 90
b = 55.075	β = 90
c = 75.311	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-08-20 
Deposition Author(s): Cianci, M., Negroni, J., Helliwell, J.R., Halling, P.J.

Revision History  

• Version 1.0: 2014-08-20
  Type: Initial release
  
• Version 1.1: 2023-12-20
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description