4GNY

Bovine beta-lactoglobulin complex with dodecyl sulfate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6367 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Ligand-binding and self-association cooperativity of beta-lactoglobulin

Gutierrez-Magdaleno, G.Bello, M.Portillo-Tellez, M.C.Rodriguez-Romero, A.Garcia-Hernandez, E.

(2013) J.Mol.Recognit. 26: 67-75

  • DOI: 10.1002/jmr.2249

  • PubMed Abstract: 
  • Unlike most small globular proteins, lipocalins lack a compact hydrophobic core. Instead, they present a large central cavity that functions as the primary binding site for hydrophobic molecules. Not surprisingly, these proteins typically exhibit com ...

    Unlike most small globular proteins, lipocalins lack a compact hydrophobic core. Instead, they present a large central cavity that functions as the primary binding site for hydrophobic molecules. Not surprisingly, these proteins typically exhibit complex structural dynamics in solution, which is intricately modified by intermolecular recognition events. Although many lipocalins are monomeric, an increasing number of them have been proven to form oligomers. The coupling effects between self-association and ligand binding in these proteins are largely unknown. To address this issue, we have calorimetrically characterized the recognition of dodecyl sulfate by bovine β-lactoglobulin, which forms weak homodimers at neutral pH. A thermodynamic analysis based on coupled-equilibria revealed that dimerization exerts disparate effects on the ligand-binding capacity of β-lactoglobulin. Protein dimerization decreases ligand affinity (or, reciprocally, ligand binding promotes dimer dissociation). The two subunits in the dimer exhibit a positive, entropically driven cooperativity. To investigate the structural determinants of the interaction, the crystal structure of β-lactoglobulin bound to dodecyl sulfate was solved at 1.64 Å resolution.


    Organizational Affiliation

    Instituto de Química Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, México, DF 04630, México.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Beta-lactoglobulin
A
162Bos taurusGene Names: LGB
Find proteins for P02754 (Bos taurus)
Go to UniProtKB:  P02754
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
SDS
Query on SDS

Download SDF File 
Download CCD File 
A
DODECYL SULFATE
C12 H26 O4 S
MOTZDAYCYVMXPC-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
SDSKd: 52000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6367 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.199 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 53.977α = 90.00
b = 53.977β = 90.00
c = 112.861γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
SCALAdata scaling
CrystalCleardata collection
PHENIXrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-02-13
    Type: Initial release