Biological Assembly 1  

 3D View: Structure

Standalone Viewers  
Protein Workshop | Ligand Explorer

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 18301.17 
• Atom Count: 1197 
• Residue Count: 162 
• Unique protein chains: 1

1B8E

HIGH RESOLUTION CRYSTAL STRUCTURE OF THE BOVINE BETA-LACTOGLOBULIN (ISOFORMS A AND B) IN ORTHOROMBIC SPACE GROUP

• DOI: 10.2210/pdb1B8E/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Bos taurus


• Deposited: 1999-01-30 Released: 2001-05-02 
• Deposition Author(s): Oliveira, K.M.G., Sawyer, L., Polikarpov, I.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.252 
• R-Value Work: 0.189 

Literature

Crystal structures of bovine beta-lactoglobulin in the orthorhombic space group C222(1). Structural differences between genetic variants A and B and features of the Tanford transition.

Oliveira, K.M., Valente-Mesquita, V.L., Botelho, M.M., Sawyer, L., Ferreira, S.T., Polikarpov, I.

(2001) Eur.J.Biochem. 268: 477-483

• PubMed: 11168385 
• Primary Citation of Related Structures:  
  1QG5
• Also Cited By: 1UZ2


• PubMed Abstract: 
  

The crystal structures of beta-lactoglobulin genetic variants A and B have been determined in the orthorhombic space group C222(1) (lattice Y) by X-ray diffraction at 2.0 A and 1.95 A resolution, respectively. The structural comparison shows that both variants exhibit the open conformation of the EF loop at the pH of crystallization (pH 7.9), in contrast to what has been reported for the same genetic variants at pH 7.1 in the trigonal space group P3221 (lattice Z) [Qin, B.Y., Bewley, M.C., Creamer, L.K., Baker, E.N. & Jameson, G.B. (1999) Protein Sci. 8, 75-83]. Furthermore, it was found that the stereochemical environment of Tyr42 changes significantly with pH variation between pH 7 and pH 8. This may provide a structural explanation for an as yet unexplained feature of the Tanford transition, namely the increase in exposure of a tyrosine residue.

---

Organizational Affiliation: 

Laboratório Nacional de Luz Síncrotron (LNLS), C.P. 1692, CEP 13083-970, Campinas, SP, Brazil.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
PROTEIN (BETA-LACTOGLOBULIN)	A	162	Bos taurus	Mutation(s): 0  Gene Names: LGB
Find proteins for P02754 (Bos taurus) Go to UniProtKB:  P02754

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.252 
• R-Value Work: 0.189 
• Space Group: C 2 2 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 55.640	α = 90.00
b = 81.650	β = 90.00
c = 66.860	γ = 90.00

Software Package:

Software Name	Purpose
DENZO	data reduction
AMoRE	phasing
SCALEPACK	data scaling
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-01-30 
• Released Date: 2001-05-02 
• Deposition Author(s): Oliveira, K.M.G., Sawyer, L., Polikarpov, I.

Revision History 

• Version 1.0: 2001-05-02
  Type: Initial release
• Version 1.1: 2008-04-26
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance