1upv
From Proteopedia
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'''CRYSTAL STRUCTURE OF THE HUMAN LIVER X RECEPTOR BETA LIGAND BINDING DOMAIN IN COMPLEX WITH A SYNTHETIC AGONIST''' | '''CRYSTAL STRUCTURE OF THE HUMAN LIVER X RECEPTOR BETA LIGAND BINDING DOMAIN IN COMPLEX WITH A SYNTHETIC AGONIST''' | ||
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[[Category: Nar, H.]] | [[Category: Nar, H.]] | ||
[[Category: Schmid, A.]] | [[Category: Schmid, A.]] | ||
| - | [[Category: | + | [[Category: Crystal structure]] |
| - | [[Category: | + | [[Category: Ligand binding domain]] |
| - | [[Category: | + | [[Category: Liver x receptor]] |
| - | [[Category: | + | [[Category: Nuclear hormone receptor]] |
| - | [[Category: | + | [[Category: Transcription factor]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 11:32:55 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 08:32, 3 May 2008
CRYSTAL STRUCTURE OF THE HUMAN LIVER X RECEPTOR BETA LIGAND BINDING DOMAIN IN COMPLEX WITH A SYNTHETIC AGONIST
Overview
LXRbeta belongs to the nuclear hormone receptor superfamily of ligand-activated transcription factors. Its natural ligands are supposed to be oxidised derivatives of cholesterol. Stimulation of LXRbeta by agonists activates a number of genes that are involved in the regulation of lipid metabolism and cholesterol efflux from cells. Therefore, LXRbeta may represent a novel therapeutic target for the treatment of dyslipidemia and atherosclerosis.Here, we report the X-ray crystal structure of the LXRbeta ligand-binding domain in complex with a synthetic agonist, T-0901317. This compound occupies the ligand-binding pocket of the receptor, forms numerous lipophilic contacts with the protein and one crucial hydrogen bond to His435 and stabilises the agonist conformation of the receptor ligand-binding domain. The recruitment of the AF2-region of the protein is not achieved via direct polar interactions of the ligand with protein side-chains of this helical segment, but rather via few hydrophobic contacts and probably more importantly via indirect effects involving the pre-orientation of side-chains that surround the ligand-binding pocket and form the interface to the AF2-helix.On the basis of these results we propose a binding mode and a mechanism of action for the putative natural ligands, oxidised derivatives of cholesterol.
About this Structure
1UPV is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Crystal structure of the human liver X receptor beta ligand-binding domain in complex with a synthetic agonist., Hoerer S, Schmid A, Heckel A, Budzinski RM, Nar H, J Mol Biol. 2003 Dec 12;334(5):853-61. PMID:14643652 Page seeded by OCA on Sat May 3 11:32:55 2008
