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1ie8

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{{STRUCTURE_1ie8| PDB=1ie8 | SCENE= }}
{{STRUCTURE_1ie8| PDB=1ie8 | SCENE= }}
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'''Crystal Structure Of The Nuclear Receptor For Vitamin D Ligand Binding Domain Bound to KH1060'''
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===Crystal Structure Of The Nuclear Receptor For Vitamin D Ligand Binding Domain Bound to KH1060===
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==Overview==
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The crystal structures of the ligand-binding domain (LBD) of the vitamin D receptor complexed to 1alpha,25(OH)(2)D(3) and the 20-epi analogs, MC1288 and KH1060, show that the protein conformation is identical, conferring a general character to the observation first made for retinoic acid receptor (RAR) that, for a given LBD, the agonist conformation is unique, the ligands adapting to the binding pocket. In all complexes, the A- to D-ring moieties of the ligands adopt the same conformation and form identical contacts with the protein. Differences are observed only for the 17beta-aliphatic chains that adapt their conformation to anchor the 25-hydroxyl group to His-305 and His-397. The inverted geometry of the C20 methyl group induces different paths of the aliphatic chains. The ligands exhibit a low-energy conformation for MC1288 and a more strained conformation for the two others. KH1060 compensates this energy cost by additional contacts. Based on the present data, the explanation of the superagonist effect is to be found in higher stability and longer half-life of the active complex, thereby excluding different conformations of the ligand binding domain.
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{{ABSTRACT_PUBMED_11344298}}
==About this Structure==
==About this Structure==
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[[Category: Kh1060]]
[[Category: Kh1060]]
[[Category: Vdr]]
[[Category: Vdr]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 19:54:13 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 10:50:07 2008''

Revision as of 07:50, 1 July 2008

Image:1ie8.png

Template:STRUCTURE 1ie8

Crystal Structure Of The Nuclear Receptor For Vitamin D Ligand Binding Domain Bound to KH1060

Template:ABSTRACT PUBMED 11344298

About this Structure

1IE8 is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Crystal structures of the vitamin D receptor complexed to superagonist 20-epi ligands., Tocchini-Valentini G, Rochel N, Wurtz JM, Mitschler A, Moras D, Proc Natl Acad Sci U S A. 2001 May 8;98(10):5491-6. PMID:11344298

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