4CK4

Ovine beta-Lactoglobulin at Atomic Resolution

• PDB DOI: https://doi.org/10.2210/pdb4CK4/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Ovis aries
• Mutation(s): Yes 


• Deposited: 2013-12-27 Released: 2014-10-08 
• Deposition Author(s): Kontopidis, G., Nordle, A., Sawyer, L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.12 Å
• R-Value Free: 0.169 
• R-Value Work: 0.139 
• R-Value Observed: 0.141 

Starting Model: experimental

Literature

Ovine Beta-Lactoglobulin at Atomic Resolution

Kontopidis, G., Nordle Gilliver, A., Sawyer, L.

(2014) Acta Crystallogr Sect F Struct Biol Cryst Commun 70: 1498

• PubMed: 25372816 
• DOI: https://doi.org/10.1107/S2053230X14020950
• Primary Citation of Related Structures:  
  4CK4


• PubMed Abstract: 
  

  The crystal structure of the triclinic form of the milk protein β-lactoglobulin from sheep (Ovis aries) at 1.1 Å resolution is described together with a comparison of the triclinic structures of the low-pH bovine and high-pH ovine proteins. All three structures are remarkably similar, despite the well known pH-dependent conformational transition described for the bovine and porcine proteins that occurs in solution. The high resolution of the present structure determination has allowed a more accurate description of the protein than has hitherto been possible, but it is still not clear whether flexibility changes in the external loops can compensate for the presence of a significant void in the unliganded interior of the structure.

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Organizational Affiliation: 

Structural Biochemistry Group, Institute of Cell and Molecular Biology, The University of Edinburgh, Swann Building, King's Buildings, Mayfield Road, Edinburgh EH10 3BF, Scotland.

Biological Assembly 1  

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

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

Biological Assembly 2  

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

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 37.26 kDa 
• Atom Count: 3,306 
• Modelled Residue Count: 323 
• Deposited Residue Count: 326 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
BETA_LACTOGLOBULIN-1/B	A, B	162	Ovis aries	Mutation(s): 1
UniProt
Find proteins for P67976 (Ovis aries) Explore P67976  Go to UniProtKB:  P67976

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	C [auth A], P [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
ACT	L [auth A], M [auth A], Y [auth B], Z [auth B]	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M
CL	AA [auth B], BA [auth B], N [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M
NA	CA [auth B], O [auth A]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N
NH4	D [auth A], E [auth A], F [auth A], G [auth A], H [auth A], I [auth A], J [auth A], K [auth A], Q [auth B], R [auth B], S [auth B], T [auth B], U [auth B], V [auth B], W [auth B], X [auth B]	AMMONIUM ION H4 N QGZKDVFQNNGYKY-UHFFFAOYSA-O

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.12 Å
• R-Value Free: 0.169 
• R-Value Work: 0.139 
• R-Value Observed: 0.141 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 37.148	α = 69.75
b = 49.031	β = 69.08
c = 49.053	γ = 77.56

Software Package:

Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALA	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-10-08 
Deposition Author(s): Kontopidis, G., Nordle, A., Sawyer, L.

Revision History  

• Version 1.0: 2014-10-08
  Type: Initial release
  
• Version 1.1: 2014-11-12
  Changes: Database references
• Version 1.2: 2015-02-25
  Changes: Database references
• Version 1.3: 2015-05-27
  Changes: Atomic model, Other
• Version 1.4: 2023-12-20
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description