1r1k
From Proteopedia
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'''Crystal structure of the ligand-binding domains of the heterodimer EcR/USP bound to ponasterone A''' | '''Crystal structure of the ligand-binding domains of the heterodimer EcR/USP bound to ponasterone A''' | ||
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[[Category: Rochel, N.]] | [[Category: Rochel, N.]] | ||
[[Category: SPINE, Structural Proteomics in Europe.]] | [[Category: SPINE, Structural Proteomics in Europe.]] | ||
| - | [[Category: | + | [[Category: Alpha-helical sandwich]] |
| - | [[Category: | + | [[Category: Heterodimer]] |
| - | [[Category: | + | [[Category: Nuclear receptor]] |
| - | [[Category: | + | [[Category: Spine]] |
| - | [[Category: | + | [[Category: Structural genomic]] |
| - | [[Category: | + | [[Category: Structural proteomics in europe]] |
| - | [[Category: | + | [[Category: Transcription regulation]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Apr 13 08:10:19 2008'' | |
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Revision as of 05:10, 13 April 2008
Crystal structure of the ligand-binding domains of the heterodimer EcR/USP bound to ponasterone A
Overview
The ecdysteroid hormones coordinate the major stages of insect development, notably moulting and metamorphosis, by binding to the ecdysone receptor (EcR); a ligand-inducible nuclear transcription factor. To bind either ligand or DNA, EcR must form a heterodimer with ultraspiracle (USP), the homologue of retinoid-X receptor. Here we report the crystal structures of the ligand-binding domains of the moth Heliothis virescens EcR-USP heterodimer in complex with the ecdysteroid ponasterone A and with a non-steroidal, lepidopteran-specific agonist BYI06830 used in agrochemical pest control. The two structures of EcR-USP emphasize the universality of heterodimerization as a general mechanism common to both vertebrates and invertebrates. Comparison of the EcR structures in complex with steroidal and non-steroidal ligands reveals radically different and only partially overlapping ligand-binding pockets that could not be predicted by molecular modelling and docking studies. These findings offer new perspectives for the design of insect-specific, environmentally safe insecticides. The concept of a ligand-dependent binding pocket in EcR provides an insight into the moulding of nuclear receptors to their ligand, and has potential applications for human nuclear receptors.
About this Structure
1R1K is a Protein complex structure of sequences from Heliothis virescens. Full crystallographic information is available from OCA.
Reference
Structural adaptability in the ligand-binding pocket of the ecdysone hormone receptor., Billas IM, Iwema T, Garnier JM, Mitschler A, Rochel N, Moras D, Nature. 2003 Nov 6;426(6962):91-6. Epub 2003 Nov 2. PMID:14595375 Page seeded by OCA on Sun Apr 13 08:10:19 2008
Categories: Heliothis virescens | Protein complex | Billas, I M.L. | Garnier, J M. | Iwema, T. | Mitschler, A. | Moras, D. | Rochel, N. | SPINE, Structural Proteomics in Europe. | Alpha-helical sandwich | Heterodimer | Nuclear receptor | Spine | Structural genomic | Structural proteomics in europe | Transcription regulation
