1e06

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[[Image:1e06.gif|left|200px]]
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{{Seed}}
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{{STRUCTURE_1e06| PDB=1e06 | SCENE= }}
{{STRUCTURE_1e06| PDB=1e06 | SCENE= }}
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'''PORCINE ODORANT BINDING PROTEIN COMPLEXED WITH 5-METHYL-2-(1-METHYLETHYL)PHENOL'''
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===PORCINE ODORANT BINDING PROTEIN COMPLEXED WITH 5-METHYL-2-(1-METHYLETHYL)PHENOL===
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==Overview==
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Porcine odorant binding protein (pOBP) is a monomer of 157 amino acid residues, purified in abundance from pig nasal mucosa. In contrast to the observation on lipocalins as retinol binding protein (RBP), major urinary protein (MUP) or bovine odorant binding protein (bOBP), no naturally occurring ligand was found in the beta-barrel cavity of pOBP. Porcine OBP was therefore chosen as a simple model for structure/function studies with odorant molecules. In competition experiments with tritiated pyrazine, the affinity of pOBP towards several odorant molecules belonging to different chemical classes has been found to be of the micromolar order, with a 1:1 stoichiometry. The X-ray structures of pOBP complexed to these molecules were determined at resolution between 2.15 and 1.4 A. As expected, the electron density of the odorant molecules was observed into the hydrophobic beta-barrel of the lipocalin. Inside this cavity, very few specific interactions were established between the odorant molecule and the amino acid side-chains, which did not undergo significant conformational change. The high B-factors observed for the odorant molecules as well as the existence of alternative conformations reveal a non-specific mode of binding of the odorant molecules in the cavity.
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(as it appears on PubMed at http://www.pubmed.gov), where 10864504 is the PubMed ID number.
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{{ABSTRACT_PUBMED_10864504}}
==About this Structure==
==About this Structure==
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[[Category: Lipocalin]]
[[Category: Lipocalin]]
[[Category: Odorant binding protein]]
[[Category: Odorant binding protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 14:29:40 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 23:55:06 2008''

Revision as of 20:55, 30 June 2008

Image:1e06.png

Template:STRUCTURE 1e06

PORCINE ODORANT BINDING PROTEIN COMPLEXED WITH 5-METHYL-2-(1-METHYLETHYL)PHENOL

Template:ABSTRACT PUBMED 10864504

About this Structure

1E06 is a Single protein structure of sequence from Sus scrofa. Full crystallographic information is available from OCA.

Reference

Complexes of porcine odorant binding protein with odorant molecules belonging to different chemical classes., Vincent F, Spinelli S, Ramoni R, Grolli S, Pelosi P, Cambillau C, Tegoni M, J Mol Biol. 2000 Jun 30;300(1):127-39. PMID:10864504

Page seeded by OCA on Mon Jun 30 23:55:06 2008

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