- EMDB-12794: Cryo-EM structure of a twisted-dimer transthyretin amyloid fibril... -
+
データを開く
IDまたはキーワード:
読み込み中...
-
基本情報
登録情報
データベース: EMDB / ID: EMD-12794
タイトル
Cryo-EM structure of a twisted-dimer transthyretin amyloid fibril from vitreous body of the eye
マップデータ
試料
組織: Transthyretin derived amyloid fibril (V30M) from vitreous body
タンパク質・ペプチド: Transthyretin
キーワード
AMYLOID FIBRIL / TRANSTHYRETIN / MISFOLDING / PROTEIN FIBRIL / ATTR AMYLOIDOSIS / V30M VARIANT / EX VIVO / VITREOUS BODY
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) / purine nucleobase metabolic process / molecular sequestering activity / phototransduction, visible light / Non-integrin membrane-ECM interactions / retinoid metabolic process / Retinoid metabolism and transport / hormone activity ...Defective visual phototransduction due to STRA6 loss of function / negative regulation of glomerular filtration / The canonical retinoid cycle in rods (twilight vision) / purine nucleobase metabolic process / molecular sequestering activity / phototransduction, visible light / Non-integrin membrane-ECM interactions / retinoid metabolic process / Retinoid metabolism and transport / hormone activity / azurophil granule lumen / Amyloid fiber formation / Neutrophil degranulation / extracellular space / extracellular exosome / extracellular region / identical protein binding 類似検索 - 分子機能
ジャーナル: Nat Commun / 年: 2021 タイトル: Structural basis for transthyretin amyloid formation in vitreous body of the eye. 著者: Irina Iakovleva / Michael Hall / Melanie Oelker / Linda Sandblad / Intissar Anan / A Elisabeth Sauer-Eriksson / 要旨: Amyloid transthyretin (ATTR) amyloidosis is characterized by the abnormal accumulation of ATTR fibrils in multiple organs. However, the structure of ATTR fibrils from the eye is poorly understood. ...Amyloid transthyretin (ATTR) amyloidosis is characterized by the abnormal accumulation of ATTR fibrils in multiple organs. However, the structure of ATTR fibrils from the eye is poorly understood. Here, we used cryo-EM to structurally characterize vitreous body ATTR fibrils. These structures were distinct from previously characterized heart fibrils, even though both have the same mutation and type A pathology. Differences were observed at several structural levels: in both the number and arrangement of protofilaments, and the conformation of the protein fibril in each layer of protofilaments. Thus, our results show that ATTR protein structure and its assembly into protofilaments in the type A fibrils can vary between patients carrying the same mutation. By analyzing and matching the interfaces between the amino acids in the ATTR fibril with those in the natively folded TTR, we are able to propose a mechanism for the structural conversion of TTR into a fibrillar form.