1OBP

ODORANT-BINDING PROTEIN FROM BOVINE NASAL MUCOSA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.164 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Domain swapping creates a third putative combining site in bovine odorant binding protein dimer

Tegoni, M.Ramoni, R.Bignetti, E.Spinelli, S.Cambillau, C.

(1996) Nat.Struct.Mol.Biol. 3: 863-867


  • PubMed Abstract: 
  • In mammals, odorant binding proteins may play an important role in the transport of odors towards specific olfactory receptors on sensory neurones across the aqueous compartment of the nasal mucus. We have solved the X-ray structure of such a transpo ...

    In mammals, odorant binding proteins may play an important role in the transport of odors towards specific olfactory receptors on sensory neurones across the aqueous compartment of the nasal mucus. We have solved the X-ray structure of such a transport protein, bovine odorant binding protein (OBP) at 2.0 A resolution. The beta-barrel of OBP is similar to that of lipocalins, but OBP dimer association results from domain swapping, an observation unique among the lipocalins. The alpha-helix of each monomer stacks against the beta-barrel of the other monomer. Contrary to previous reports, each monomer has an internal buried cavity which could accommodate a naturally occurring molecule. Besides this cavity, an open cavity is located at the dimer interface. Data in solution suggest that this central cavity may be a binding site created by domain swapping.


    Related Citations: 
    • Purification and Characterisation of an Odorant-Binding Protein from Cow Nasal Tissue
      Bignetti, E.,Cavaggioni, A.,Pelosi, P.,Persaud, K.C.,Sorbi, R.T.,Tirindelli, R.
      (1985) Eur.J.Biochem. 149: 227
    • Identification of a Specific Olfactory Receptor for 2-Isobutyl-3-Methoxypyrazine
      Pelosi, P.,Baldaccini, N.E.,Pisanelli, A.M.
      (1982) Biochem.J. 201: 245
    • Preparation of an Affinity Resin for Odorants by Coupling Odorant Binding Protein from Bovine Nasal Mucosa to Sepharose 4B
      Bignetti, E.,Bussolati, L.,Ramoni, R.,Grolli, S.,Donofrio, G.
      (1993) J.Biotechnol. 30: 225


    Organizational Affiliation

    UPR9039-CNRS, IFR1, Marseille, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ODORANT-BINDING PROTEIN
A, B
159Bos taurusMutation(s): 0 
Find proteins for P07435 (Bos taurus)
Go to UniProtKB:  P07435
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
UNX
Query on UNX

Download SDF File 
Download CCD File 
A, B
UNKNOWN ATOM OR ION
X
*
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.164 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 55.900α = 90.00
b = 65.500β = 98.80
c = 42.700γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORphasing
DENZOdata reduction
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-10-14
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance