- PDB-8u52: Co-crystal structure of human transthyretin conjugated to the sti... -
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基本情報
登録情報
データベース: PDB / ID: 8u52
タイトル
Co-crystal structure of human transthyretin conjugated to the stilbene substructure derived from reaction with the fluorogenic covalent kinetic stabilizer A2
要素
Transthyretin
キーワード
TRANSPORT PROTEIN / transthyretin / amyloidosis / stabilizer / covalent / fluorogenic
機能・相同性
機能・相同性情報
Defective visual phototransduction due to STRA6 loss of function / negative regulation of glomerular filtration / The canonical retinoid cycle in rods (twilight vision) / hormone binding / purine nucleobase metabolic process / molecular sequestering activity / Non-integrin membrane-ECM interactions / phototransduction, visible light / retinoid metabolic process / Retinoid metabolism and transport ...Defective visual phototransduction due to STRA6 loss of function / negative regulation of glomerular filtration / The canonical retinoid cycle in rods (twilight vision) / hormone binding / purine nucleobase metabolic process / molecular sequestering activity / Non-integrin membrane-ECM interactions / phototransduction, visible light / retinoid metabolic process / Retinoid metabolism and transport / hormone activity / azurophil granule lumen / Amyloid fiber formation / Neutrophil degranulation / protein-containing complex binding / protein-containing complex / extracellular space / extracellular exosome / extracellular region / identical protein binding 類似検索 - 分子機能
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)
5R01DK046335-32
米国
引用
ジャーナル: Nat Struct Mol Biol / 年: 2025 タイトル: The conformational landscape of human transthyretin revealed by cryo-EM. 著者: Benjamin Basanta / Karina Nugroho / Nicholas L Yan / Gabriel M Kline / Evan T Powers / Felix J Tsai / Mengyu Wu / Althea Hansel-Harris / Jason S Chen / Stefano Forli / Jeffrey W Kelly / Gabriel C Lander / 要旨: Transthyretin (TTR) is a natively tetrameric thyroxine transporter in blood and cerebrospinal fluid whose misfolding and aggregation causes TTR amyloidosis. A rational drug design campaign identified ...Transthyretin (TTR) is a natively tetrameric thyroxine transporter in blood and cerebrospinal fluid whose misfolding and aggregation causes TTR amyloidosis. A rational drug design campaign identified the small molecule tafamidis (Vyndamax) as a stabilizer of the native TTR fold, and this aggregation inhibitor is regulatory agency approved for the treatment of TTR amyloidosis. Here we used cryo-EM to investigate the conformational landscape of this 55 kDa tetramer in the absence and presence of one or two ligands, revealing inherent asymmetries in the tetrameric architecture and previously unobserved conformational states. These findings provide critical mechanistic insights into negatively cooperative ligand binding and the structural pathways responsible for TTR amyloidogenesis, underscoring the capacity of cryo-EM to identify pharmacological targets suppressed by the confines of the crystal lattice, opening uncharted territory in structure-based drug design.
温度: 298 K / 手法: 蒸気拡散法, シッティングドロップ法 詳細: The WT-TTR was concentrated to 4 mg/mL in 10 mM sodium phosphate, 100 mM KCl, at pH 7.6 and co-crystallized at room temperature using the vapor diffusion sitting drop method.
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データ収集
回折
平均測定温度: 100 K / Serial crystal experiment: N
放射光源
由来: シンクロトロン / サイト: ALS / ビームライン: 5.0.1 / 波長: 0.97741 Å
構造決定の手法: 分子置換 / 解像度: 1.5→42.64 Å / Cor.coef. Fo:Fc: 0.97 / Cor.coef. Fo:Fc free: 0.963 / SU B: 1.202 / SU ML: 0.045 / 交差検証法: THROUGHOUT / ESU R: 0.071 / ESU R Free: 0.073 / 立体化学のターゲット値: MAXIMUM LIKELIHOOD / 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
Rfactor
反射数
%反射
Selection details
Rfree
0.19389
1844
5 %
RANDOM
Rwork
0.16483
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obs
0.16629
34712
95.49 %
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溶媒の処理
イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: MASK