Domain swapping creates a third putative combining site in bovine odorant binding protein dimerTegoni, M., Ramoni, R., Bignetti, E., Spinelli, S., Cambillau, C.
(1996) Nat Struct Biol 3: 863-867
- PubMed: 8836103
- DOI: 10.1038/nsb1096-863
- Primary Citation of Related Structures:
- PubMed Abstract:
- 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
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.
UPR9039-CNRS, IFR1, Marseille, France.