3IMR

Transthyretin in complex with (E)-2,6-dibromo-4-(2,6-dichlorostyryl)phenol

3IMR の概要

• エントリーDOI: 10.2210/pdb3imr/pdb
• 関連するPDBエントリー: 2QGB 2QGC 2QGD 2QGE 3ESN 3ESO 3IMS 3IMT 3IMU 3IMV 3IMW
• 分子名称: Transthyretin, 2,6-dibromo-4-[(E)-2-(2,6-dichlorophenyl)ethenyl]phenol (3 entities in total)
• 機能のキーワード: hormone, growth factor, amyloid, disease mutation, gamma-carboxyglutamic acid, glycoprotein, polymorphism, polyneuropathy, retinol-binding, secreted, thyroid hormone, transport, vitamin a
• 由来する生物種: Homo sapiens (human)
• 細胞内の位置: Secreted: P02766
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 28400.57

構造登録者

Connelly, S.,Wilson, I.A. (登録日: 2009-08-11, 公開日: 2010-01-12, 最終更新日: 2023-09-06)

主引用文献

Choi, S.,Reixach, N.,Connelly, S.,Johnson, S.M.,Wilson, I.A.,Kelly, J.W.
A substructure combination strategy to create potent and selective transthyretin kinetic stabilizers that prevent amyloidogenesis and cytotoxicity.
J.Am.Chem.Soc., 132:1359-1370, 2010

PubMed Abstract: Transthyretin aggregation-associated proteotoxicity appears to cause several human amyloid diseases. Rate-limiting tetramer dissociation and monomer misfolding of transthyretin (TTR) occur before its aggregation into cross-beta-sheet amyloid fibrils. Small molecule binding to and preferential stabilization of the tetrameric state of TTR over the dissociative transition state raises the kinetic barrier for dissociation, imposing kinetic stabilization on TTR and preventing aggregation. This is an effective strategy to halt neurodegeneration associated with polyneuropathy, according to recent placebo-controlled clinical trial results. In three recent papers, we systematically ranked possibilities for the three substructures composing a typical TTR kinetic stabilizer, using fibril inhibition potency and plasma TTR binding selectivity data. Herein, we have successfully employed a substructure combination strategy to use these data to develop potent and selective TTR kinetic stabilizers that rescue cells from the cytotoxic effects of TTR amyloidogenesis. Of the 92 stilbene and dihydrostilbene analogues synthesized, nearly all potently inhibit TTR fibril formation. Seventeen of these exhibit a binding stoichiometry of >1.5 of a maximum of 2 to plasma TTR, while displaying minimal binding to the thyroid hormone receptor (<20%). Six analogues were definitively categorized as kinetic stabilizers by evaluating dissociation time-courses. High-resolution TTR.(kinetic stabilizer)(2) crystal structures (1.31-1.70 A) confirmed the anticipated binding orientation of the 3,5-dibromo-4-hydroxyphenyl substructure and revealed a strong preference of the isosteric 3,5-dibromo-4-aminophenyl substructure to bind to the inner thyroxine binding pocket of TTR.

PubMed: 20043671
DOI: 10.1021/ja908562q

実験手法

X-RAY DIFFRACTION (1.7 Å)