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基本情報
登録情報 | データベース: PDB / ID: 8qgy | |||||||||
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タイトル | Cryo-EM structure of C-terminally truncated Apoptosis signal-regulating kinase 1 (ASK1) | |||||||||
![]() | Mitogen-activated protein kinase kinase kinase 5 | |||||||||
![]() | APOPTOSIS / ASK1 / MAP3K / MAPK signaling / thioredoxin | |||||||||
機能・相同性 | ![]() cellular response to reactive nitrogen species / neuron intrinsic apoptotic signaling pathway in response to oxidative stress / IRE1-TRAF2-ASK1 complex / protein kinase complex / mitogen-activated protein kinase kinase kinase / programmed necrotic cell death / JUN kinase kinase kinase activity / endothelial cell apoptotic process / positive regulation of p38MAPK cascade / intrinsic apoptotic signaling pathway in response to oxidative stress ...cellular response to reactive nitrogen species / neuron intrinsic apoptotic signaling pathway in response to oxidative stress / IRE1-TRAF2-ASK1 complex / protein kinase complex / mitogen-activated protein kinase kinase kinase / programmed necrotic cell death / JUN kinase kinase kinase activity / endothelial cell apoptotic process / positive regulation of p38MAPK cascade / intrinsic apoptotic signaling pathway in response to oxidative stress / positive regulation of cardiac muscle cell apoptotic process / p38MAPK cascade / positive regulation of cysteine-type endopeptidase activity involved in apoptotic process / MAP kinase kinase kinase activity / intrinsic apoptotic signaling pathway in response to endoplasmic reticulum stress / positive regulation of protein kinase activity / positive regulation of myoblast differentiation / stress-activated MAPK cascade / JNK cascade / positive regulation of JUN kinase activity / positive regulation of vascular associated smooth muscle cell proliferation / cellular response to amino acid starvation / response to endoplasmic reticulum stress / response to ischemia / apoptotic signaling pathway / positive regulation of JNK cascade / cellular response to hydrogen peroxide / MAPK cascade / cellular senescence / cellular response to tumor necrosis factor / protein phosphatase binding / neuron apoptotic process / Oxidative Stress Induced Senescence / protein kinase activity / positive regulation of apoptotic process / protein domain specific binding / external side of plasma membrane / protein phosphorylation / innate immune response / protein serine kinase activity / protein serine/threonine kinase activity / protein kinase binding / positive regulation of DNA-templated transcription / magnesium ion binding / protein homodimerization activity / protein-containing complex / ATP binding / identical protein binding / cytosol / cytoplasm 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: 3.71 Å | |||||||||
![]() | Kosek, D. / Honzejkova, K. / Obsilova, V. / Obsil, T. | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: The cryo-EM structure of ASK1 reveals an asymmetric architecture allosterically modulated by TRX1. 著者: Karolina Honzejkova / Dalibor Kosek / Veronika Obsilova / Tomas Obsil / ![]() 要旨: Apoptosis signal-regulating kinase 1 (ASK1) is a crucial stress sensor, directing cells toward apoptosis, differentiation, and senescence via the p38 and JNK signaling pathways. ASK1 dysregulation ...Apoptosis signal-regulating kinase 1 (ASK1) is a crucial stress sensor, directing cells toward apoptosis, differentiation, and senescence via the p38 and JNK signaling pathways. ASK1 dysregulation has been associated with cancer and inflammatory, cardiovascular, and neurodegenerative diseases, among others. However, our limited knowledge of the underlying structural mechanism of ASK1 regulation hampers our ability to target this member of the MAP3K protein family towards developing therapeutic interventions for these disorders. Nevertheless, as a multidomain Ser/Thr protein kinase, ASK1 is regulated by a complex mechanism involving dimerization and interactions with several other proteins, including thioredoxin 1 (TRX1). Thus, the present study aims at structurally characterizing ASK1 and its complex with TRX1 using several biophysical techniques. As shown by cryo-EM analysis, in a state close to its active form, ASK1 is a compact and asymmetric dimer, which enables extensive interdomain and interchain interactions. These interactions stabilize the active conformation of the ASK1 kinase domain. In turn, TRX1 functions as a negative allosteric effector of ASK1, modifying the structure of the TRX1-binding domain and changing its interaction with the tetratricopeptide repeats domain. Consequently, TRX1 reduces access to the activation segment of the kinase domain. Overall, our findings not only clarify the role of ASK1 dimerization and inter-domain contacts but also provide key mechanistic insights into its regulation, thereby highlighting the potential of ASK1 protein-protein interactions as targets for anti-inflammatory therapy. | |||||||||
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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PDBx/mmCIF形式 | ![]() | 583.1 KB | 表示 | ![]() |
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PDB形式 | ![]() | 473.8 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 18396MC 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 | 分子量: 101908.625 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() |
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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: PARTICLE / 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: C-terminally truncated Apoptosis signal-regulating kinase 1 タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
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分子量 | 値: 0.2035 MDa / 実験値: YES |
由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() ![]() |
緩衝液 | pH: 7.5 詳細: 20 mM Tris-HCl 7.5 150 mM NaCl 2 mM 2-mercaptoethanol 3.8 mM CHAPSO |
試料 | 濃度: 0.7 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | 詳細: Gatan Solarus II 955 / 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: UltrAuFoil R1.2/1.3 |
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 298 K |
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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 / 倍率(公称値): 105000 X / 最大 デフォーカス(公称値): 2800 nm / 最小 デフォーカス(公称値): 700 nm |
撮影 | 電子線照射量: 40 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: 2 / 実像数: 5781 詳細: 40 frames 2704 micrographs with 0 degree tilt, 8691 micrographs with 40 degree tilt, 5781 selected for analysis |
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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: 1126189 | |||||||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.71 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 131110 詳細: Sharpening was done using phenix.autosharpen (1.19.1-4122) 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 | |||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | 3D fitting-ID: 1
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拘束条件 |
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