1BSO

12-BROMODODECANOIC ACID BINDS INSIDE THE CALYX OF BOVINE BETA-LACTOGLOBULIN

• PDB DOI: https://doi.org/10.2210/pdb1BSO/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Bos taurus
• Mutation(s): No 


• Deposited: 1998-08-29 Released: 1999-09-02 
• Deposition Author(s): Qin, B.Y., Creamer, L.K., Baker, E.N., Jameson, G.B.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.23 Å
• R-Value Free: 0.276 
• R-Value Work: 0.234 
• R-Value Observed: 0.234 

Starting Model: experimental

Literature

12-Bromododecanoic acid binds inside the calyx of bovine beta-lactoglobulin.

Qin, B.Y., Creamer, L.K., Baker, E.N., Jameson, G.B.

(1998) FEBS Lett 438: 272-278

• PubMed: 9827560 
• DOI: https://doi.org/10.1016/s0014-5793(98)01199-5
• Primary Citation of Related Structures:  
  1BSO


• PubMed Abstract: 
  

  The X-ray structure of bovine beta-lactoglobulin with the ligand 12-bromododecanoic acid as a model for fatty acids has been determined at a resolution of 2.23 A in the trigonal lattice Z form. The ligand binds inside the calyx, resolving a long-standing controversy as to where fatty-acid like ligands bind. The carboxylate head group lies at the surface of the molecule, and the lid to the calyx is open at the pH of crystallization (pH 7.3), consistent with the conformation observed in ligand-free bovine beta-lactoglobulin in lattice Z at pH 7.1 and pH 8.2.

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Organizational Affiliation: 

Centre for Structural Biology, Institute of Fundamental Sciences, Massey University, Palmerston North, New Zealand.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 18.67 kDa 
• Atom Count: 1,367 
• Modelled Residue Count: 162 
• Deposited Residue Count: 162 
• Unique protein chains: 1

Macromolecules

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

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
BRC	B [auth A]	12-BROMODODECANOIC ACID C12 H23 Br O2 YYKBWYBUCFHYPR-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.23 Å
• R-Value Free: 0.276 
• R-Value Work: 0.234 
• R-Value Observed: 0.234 
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 54.026	α = 90
b = 54.026	β = 90
c = 112.183	γ = 120

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 1999-09-02 
Deposition Author(s): Qin, B.Y., Creamer, L.K., Baker, E.N., Jameson, G.B.

Revision History  

• Version 1.0: 1999-09-02
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-04-03
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 1.4: 2024-10-30
  Changes: Structure summary