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2qab
From Proteopedia
Crystal Structure of Estrogen Receptor Alpha Ligand Binding Domain Mutant 537S Complexed with an Ethyl Indazole Compound
Overview
Our understanding of how steroid hormones regulate physiological functions has been significantly advanced by structural biology approaches. However, progress has been hampered by misfolding of the ligand binding domains in heterologous expression systems and by conformational flexibility that interferes with crystallization. Here, we show that protein folding problems that are common to steroid hormone receptors are circumvented by mutations that stabilize well-characterized conformations of the receptor. We use this approach to present the structure of an apo steroid receptor that reveals a ligand-accessible channel allowing soaking of preformed crystals. Furthermore, crystallization of different pharmacological classes of compounds allowed us to define the structural basis of NFkappaB-selective signaling through the estrogen receptor, thus revealing a unique conformation of the receptor that allows selective suppression of inflammatory gene expression. The ability to crystallize many receptor-ligand complexes with distinct pharmacophores allows one to define structural features of signaling specificity that would not be apparent in a single structure.
About this Structure
2QAB is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.
Reference
NFkappaB selectivity of estrogen receptor ligands revealed by comparative crystallographic analyses., Nettles KW, Bruning JB, Gil G, Nowak J, Sharma SK, Hahm JB, Kulp K, Hochberg RB, Zhou H, Katzenellenbogen JA, Katzenellenbogen BS, Kim Y, Joachmiak A, Greene GL, Nat Chem Biol. 2008 Apr;4(4):241-7. Epub 2008 Mar 16. PMID:18344977 Page seeded by OCA on Sun May 4 14:37:32 2008
