4HIS

The Structure of V122I Mutant Transthyretin in Complex with Tafamidis

4HIS の概要

• エントリーDOI: 10.2210/pdb4his/pdb
• 関連するPDBエントリー: 3TCT 4HIQ
• 分子名称: Transthyretin, 2-(3,5-dichlorophenyl)-1,3-benzoxazole-6-carboxylic acid (3 entities in total)
• 機能のキーワード: thyroid hormone transport, thyroxine, retinol binding protein, hormone binding protein-inhibitor complex, hormone binding protein/inhibitor
• 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: 27890.89

構造登録者

Connelly, S.,Alhamadsheh, M.,Graef, I.,Wilson, I.A. (登録日: 2012-10-11, 公開日: 2013-06-05, 最終更新日: 2023-09-20)

主引用文献

Penchala, S.C.,Connelly, S.,Wang, Y.,Park, M.S.,Zhao, L.,Baranczak, A.,Rappley, I.,Vogel, H.,Liedtke, M.,Witteles, R.M.,Powers, E.T.,Reixach, N.,Chan, W.K.,Wilson, I.A.,Kelly, J.W.,Graef, I.A.,Alhamadsheh, M.M.
AG10 inhibits amyloidogenesis and cellular toxicity of the familial amyloid cardiomyopathy-associated V122I transthyretin.
Proc.Natl.Acad.Sci.USA, 110:9992-9997, 2013

PubMed Abstract: The misassembly of soluble proteins into toxic aggregates, including amyloid fibrils, underlies a large number of human degenerative diseases. Cardiac amyloidoses, which are most commonly caused by aggregation of Ig light chains or transthyretin (TTR) in the cardiac interstitium and conducting system, represent an important and often underdiagnosed cause of heart failure. Two types of TTR-associated amyloid cardiomyopathies are clinically important. The Val122Ile (V122I) mutation, which alters the kinetic stability of TTR and affects 3% to 4% of African American subjects, can lead to development of familial amyloid cardiomyopathy. In addition, aggregation of WT TTR in individuals older than age 65 y causes senile systemic amyloidosis. TTR-mediated amyloid cardiomyopathies are chronic and progressive conditions that lead to arrhythmias, biventricular heart failure, and death. As no Food and Drug Administration-approved drugs are currently available for treatment of these diseases, the development of therapeutic agents that prevent TTR-mediated cardiotoxicity is desired. Here, we report the development of AG10, a potent and selective kinetic stabilizer of TTR. AG10 prevents dissociation of V122I-TTR in serum samples obtained from patients with familial amyloid cardiomyopathy. In contrast to other TTR stabilizers currently in clinical trials, AG10 stabilizes V122I- and WT-TTR equally well and also exceeds their efficacy to stabilize WT and mutant TTR in whole serum. Crystallographic studies of AG10 bound to V122I-TTR give valuable insights into how AG10 achieves such effective kinetic stabilization of TTR, which will also aid in designing better TTR stabilizers. The oral bioavailability of AG10, combined with additional desirable drug-like features, makes it a very promising candidate to treat TTR amyloid cardiomyopathy.

PubMed: 23716704
DOI: 10.1073/pnas.1300761110

実験手法

X-RAY DIFFRACTION (1.2 Å)