4AO1 | pdb_00004ao1

High resolution crystal structure of bovine pancreatic ribonuclease crystallized using ionic liquid

• PDB DOI: https://doi.org/10.2210/pdb4AO1/pdb

• Classification: HYDROLASE
• Organism(s): Bos taurus
• Mutation(s): No 


• Deposited: 2012-03-23 Released: 2012-07-18 
• Deposition Author(s): Mukhopadhyay, A., Carvalho, A.L., Kowacz, M., Romao, M.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.58 Å
• R-Value Free: 
  0.196 (Depositor), 0.194 (DCC) 
• R-Value Work: 
  0.162 (Depositor), 0.162 (DCC) 
• R-Value Observed: 
  0.164 (Depositor) 

Starting Model: experimental

Literature

Hofmeister Effects of Ionic Liquids in Protein Crystallization: Direct and Water-Mediated Interactions

Kowacz, M., Mukhopadhyay, A., Carvalho, A.L., Esperanca, J.M.S.S., Romao, M.J., Rebelo, L.P.N.

(2012) CrystEngComm 14: 4912

• DOI: https://doi.org/10.1039/C2CE25129A

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 13.88 kDa 
• Atom Count: 1,162 
• Modeled Residue Count: 124 
• Deposited Residue Count: 124 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
RIBONUCLEASE PANCREATIC	A	124	Bos taurus	Mutation(s): 0  EC: 3.1.27.5 (PDB Primary Data), 4.6.1.18 (UniProt)
UniProt
Find proteins for P61823 (Bos taurus) Explore P61823  Go to UniProtKB:  P61823

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	C [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
CL	B [auth A], D [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.58 Å
• R-Value Free:  0.196 (Depositor), 0.194 (DCC) 
• R-Value Work:  0.162 (Depositor), 0.162 (DCC) 
• R-Value Observed: 0.164 (Depositor) 

Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 64.006	α = 90
b = 64.006	β = 90
c = 63.616	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
SCALA	data scaling
REFMAC	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-07-18 
Deposition Author(s): Mukhopadhyay, A., Carvalho, A.L., Kowacz, M., Romao, M.J.

Revision History  

• Version 1.0: 2012-07-18
  Type: Initial release
  
• Version 1.1: 2019-05-08
  Changes: Advisory, Data collection, Experimental preparation, Other
• Version 1.2: 2023-12-20
  Changes: Advisory, Data collection, Database references, Derived calculations, Other, Refinement description
• Version 1.3: 2024-11-20
  Changes: Structure summary