1OBP

ODORANT-BINDING PROTEIN FROM BOVINE NASAL MUCOSA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.164 
  • R-Value Observed: 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 Biol 3: 863-867

  • DOI: 10.1038/nsb1096-863
  • Primary Citation of Related Structures:  
    1OBP

  • 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: 
    • 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
    • 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

    Organizational Affiliation

    UPR9039-CNRS, IFR1, Marseille, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ODORANT-BINDING PROTEINAB159Bos taurusMutation(s): 0 
Find proteins for P07435 (Bos taurus)
Explore P07435 
Go to UniProtKB:  P07435
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
UNX
Query on UNX

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A, B
UNKNOWN ATOM OR ION
X
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.164 
  • R-Value Observed: 0.164 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.9α = 90
b = 65.5β = 98.8
c = 42.7γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
DENZOdata reduction
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

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