1mz9
From Proteopedia
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|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1mz9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mz9 OCA], [http://www.ebi.ac.uk/pdbsum/1mz9 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1mz9 RCSB]</span> | ||
}} | }} | ||
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[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Stetefeld, J.]] | [[Category: Stetefeld, J.]] | ||
| - | [[Category: VDY]] | ||
[[Category: pentameric coiled-coil domain]] | [[Category: pentameric coiled-coil domain]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 22:23:09 2008'' |
Revision as of 19:23, 30 March 2008
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| , resolution 1.70Å | |||||||
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| Ligands: | |||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Storage function of COMP:the crystal structure of the coiled-coil domain in complex with vitamin D3
Overview
The five-stranded coiled-coil domain of cartilage oligomeric matrix protein (COMPcc) forms a continuous axial pore with binding capacities for hydrophobic compounds, including prominent cell signalling molecules. Here, we report the X-ray structure of the COMPcc domain in complex with vitamin D(3) at 1.7 A resolution. The COMPcc pentamer harbours two molecules of the steroid hormone precursor in a planar s-trans conformation of the conjugated triene, with the aliphatic tails lying along the molecule axis. A hydrophilic ring of five Gln54 side chains divides the channel into two hydrophobic compartments in which the bound vitamin D(3) pair is fixed in a head-to-head orientation. Vitamin D(3) binding induces a volumetric increase of the cavities of approximately 30% while the main chain distances of the pentamer are retained. This adaptation to the bulky ring systems of the ligands is accomplished by a rotamer re-orientation of beta-branched side chains that form the knobs into holes of the coiled-coil structure. Compared with binding of vitamin D and retinoic acid by their classical receptors, COMP exerts a distinct mechanism of interaction mainly defined by the pattern of hydrophobic core residues.
About this Structure
1MZ9 is a Single protein structure of sequence from Mus musculus. Full crystallographic information is available from OCA.
Reference
Storage function of cartilage oligomeric matrix protein: the crystal structure of the coiled-coil domain in complex with vitamin D(3)., Ozbek S, Engel J, Stetefeld J, EMBO J. 2002 Nov 15;21(22):5960-8. PMID:12426368
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