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基本情報
登録情報 | データベース: PDB / ID: 8sbd | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
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タイトル | Cryo-EM structure of insulin amyloid-like fibril that is composed of two antiparallel protofilaments | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
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![]() | SIGNALING PROTEIN / amyloid-like fibril | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
機能・相同性 | ![]() negative regulation of NAD(P)H oxidase activity / negative regulation of glycogen catabolic process / negative regulation of feeding behavior / positive regulation of nitric oxide mediated signal transduction / negative regulation of fatty acid metabolic process / Signaling by Insulin receptor / IRS activation / Insulin processing / regulation of protein secretion / positive regulation of peptide hormone secretion ...negative regulation of NAD(P)H oxidase activity / negative regulation of glycogen catabolic process / negative regulation of feeding behavior / positive regulation of nitric oxide mediated signal transduction / negative regulation of fatty acid metabolic process / Signaling by Insulin receptor / IRS activation / Insulin processing / regulation of protein secretion / positive regulation of peptide hormone secretion / positive regulation of protein autophosphorylation / Regulation of gene expression in beta cells / positive regulation of respiratory burst / negative regulation of acute inflammatory response / alpha-beta T cell activation / positive regulation of dendritic spine maintenance / Synthesis, secretion, and deacylation of Ghrelin / negative regulation of respiratory burst involved in inflammatory response / positive regulation of insulin receptor signaling pathway / negative regulation of protein secretion / activation of protein kinase B activity / negative regulation of gluconeogenesis / positive regulation of glycogen biosynthetic process / fatty acid homeostasis / Signal attenuation / FOXO-mediated transcription of oxidative stress, metabolic and neuronal genes / negative regulation of lipid catabolic process / positive regulation of lipid biosynthetic process / regulation of protein localization to plasma membrane / negative regulation of oxidative stress-induced intrinsic apoptotic signaling pathway / transport vesicle / nitric oxide-cGMP-mediated signaling / COPI-mediated anterograde transport / positive regulation of nitric-oxide synthase activity / Insulin receptor recycling / negative regulation of reactive oxygen species biosynthetic process / insulin-like growth factor receptor binding / positive regulation of brown fat cell differentiation / NPAS4 regulates expression of target genes / neuron projection maintenance / endoplasmic reticulum-Golgi intermediate compartment membrane / positive regulation of mitotic nuclear division / Insulin receptor signalling cascade / regulation of transmembrane transporter activity / positive regulation of glycolytic process / positive regulation of cytokine production / positive regulation of long-term synaptic potentiation / endosome lumen / acute-phase response / positive regulation of protein secretion / positive regulation of D-glucose import / insulin receptor binding / positive regulation of cell differentiation / Regulation of insulin secretion / wound healing / negative regulation of protein catabolic process / hormone activity / regulation of synaptic plasticity / positive regulation of neuron projection development / positive regulation of protein localization to nucleus / Golgi lumen / cognition / glucose metabolic process / vasodilation / insulin receptor signaling pathway / glucose homeostasis / cell-cell signaling / regulation of protein localization / PI5P, PP2A and IER3 Regulate PI3K/AKT Signaling / positive regulation of cell growth / protease binding / secretory granule lumen / positive regulation of canonical NF-kappaB signal transduction / positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / positive regulation of MAPK cascade / positive regulation of cell migration / G protein-coupled receptor signaling pathway / Amyloid fiber formation / endoplasmic reticulum lumen / Golgi membrane / negative regulation of gene expression / positive regulation of cell population proliferation / positive regulation of gene expression / regulation of DNA-templated transcription / extracellular space / extracellular region / identical protein binding 類似検索 - 分子機能 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
生物種 | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.2 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() | Wang, L.W. / Hall, C. / Uchikawa, E. / Chen, D.L. / Choi, E. / Zhang, X.W. / Bai, X.C. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural basis of insulin fibrillation. 著者: Liwei Wang / Catherine E Hall / Emiko Uchikawa / Dailu Chen / Eunhee Choi / Xuewu Zhang / Xiao-Chen Bai / ![]() 要旨: Insulin is a hormone responsible for maintaining normal glucose levels by activating insulin receptor (IR) and is the primary treatment for diabetes. However, insulin is prone to unfolding and ...Insulin is a hormone responsible for maintaining normal glucose levels by activating insulin receptor (IR) and is the primary treatment for diabetes. However, insulin is prone to unfolding and forming cross-β fibers. Fibrillation complicates insulin storage and therapeutic application. Molecular details of insulin fibrillation remain unclear, hindering efforts to prevent fibrillation process. Here, we characterized insulin fibrils using cryo-electron microscopy (cryo-EM), showing multiple forms that contain one or more of the protofilaments containing both the A and B chains of insulin linked by disulfide bonds. We solved the cryo-EM structure of one of the fibril forms composed of two protofilaments at 3.2-Å resolution, which reveals both the β sheet conformation of the protofilament and the packing interaction between them that underlie the fibrillation. On the basis of this structure, we designed several insulin mutants that display reduced fibrillation while maintaining native IR signaling activity. These designed insulin analogs may be developed into more effective therapeutics for type 1 diabetes. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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ダウンロード
PDBx/mmCIF形式 | ![]() | 214 KB | 表示 | ![]() |
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PDB形式 | ![]() | 177.2 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 1.2 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.2 MB | 表示 | |
XML形式データ | ![]() | 26.9 KB | 表示 | |
CIF形式データ | ![]() | 42.3 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 40305MC M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
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類似構造データ | 類似検索 - 機能・相同性 ![]() |
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リンク
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集合体
登録構造単位 | ![]()
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要素
#1: タンパク質・ペプチド | 分子量: 3433.953 Da / 分子数: 16 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #2: タンパク質・ペプチド | 分子量: 2383.698 Da / 分子数: 16 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() Has protein modification | Y | |
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-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: FILAMENT / 3次元再構成法: 単粒子再構成法 |
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試料調製
構成要素 | 名称: Cryo-EM structure of insulin amyloid-like fibril that is composed of two antiparallel protofilaments タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
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分子量 | 実験値: NO |
由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() ![]() |
緩衝液 | pH: 2 |
試料 | 濃度: 1 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | グリッドの材料: GOLD / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: Quantifoil R1.2/1.3 |
急速凍結 | 凍結剤: ETHANE |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TITAN KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2600 nm / 最小 デフォーカス(公称値): 1600 nm |
試料ホルダ | 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
撮影 | 平均露光時間: 8 sec. / 電子線照射量: 60 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 撮影したグリッド数: 1 |
電子光学装置 | エネルギーフィルター名称: GIF Bioquantum / エネルギーフィルタースリット幅: 20 eV |
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解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 551345 | |||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.2 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 56537 / 対称性のタイプ: POINT | |||||||||||||||||||||||||||||||||
原子モデル構築 | プロトコル: FLEXIBLE FIT / 空間: REAL | |||||||||||||||||||||||||||||||||
拘束条件 |
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