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基本情報
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タイトル | Structure of mammalian spectrin-actin junctional complex of membrane skeleton, State II, Global map | |||||||||
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![]() | Macrocomplex / membrane skeleton / spectrin-actin junction / MEMBRANE PROTEIN | |||||||||
機能・相同性 | ![]() negative regulation of protein targeting to membrane / endoplasmic reticulum tubular network organization / pointed-end actin filament capping / Regulation of actin dynamics for phagocytic cup formation / EPHB-mediated forward signaling / Adherens junctions interactions / VEGFA-VEGFR2 Pathway / Cell-extracellular matrix interactions / RHO GTPases Activate WASPs and WAVEs / MAP2K and MAPK activation ...negative regulation of protein targeting to membrane / endoplasmic reticulum tubular network organization / pointed-end actin filament capping / Regulation of actin dynamics for phagocytic cup formation / EPHB-mediated forward signaling / Adherens junctions interactions / VEGFA-VEGFR2 Pathway / Cell-extracellular matrix interactions / RHO GTPases Activate WASPs and WAVEs / MAP2K and MAPK activation / UCH proteinases / spectrin / Gap junction degradation / Formation of annular gap junctions / RHOF GTPase cycle / Clathrin-mediated endocytosis / Formation of the dystrophin-glycoprotein complex (DGC) / lens fiber cell development / myofibril assembly / spectrin-associated cytoskeleton / negative regulation of substrate adhesion-dependent cell spreading / platelet dense tubular network membrane / cellular response to cytochalasin B / negative regulation of focal adhesion assembly / regulation of transepithelial transport / morphogenesis of a polarized epithelium / regulation of filopodium assembly / cell projection membrane / protein localization to adherens junction / postsynaptic actin cytoskeleton / structural constituent of postsynaptic actin cytoskeleton / Tat protein binding / COP9 signalosome / dense body / actin filament capping / apical protein localization / regulation of lamellipodium assembly / adherens junction assembly / positive regulation of fibroblast migration / RHO GTPases activate IQGAPs / RHO GTPases Activate Formins / tight junction / smooth endoplasmic reticulum calcium ion homeostasis / regulation of norepinephrine uptake / transporter regulator activity / apical junction complex / nitric-oxide synthase binding / positive regulation of wound healing / spectrin binding / tropomyosin binding / NuA4 histone acetyltransferase complex / establishment or maintenance of cell polarity / cortical cytoskeleton / myofibril / regulation of synaptic vesicle endocytosis / brush border / kinesin binding / striated muscle thin filament / erythrocyte development / smooth endoplasmic reticulum / positive regulation of double-strand break repair via homologous recombination / regulation of protein localization to plasma membrane / cellular response to cAMP / muscle contraction / calyx of Held / axonogenesis / adult locomotory behavior / actin filament organization / adherens junction / actin filament / regulation of actin cytoskeleton organization / cell motility / Schaffer collateral - CA1 synapse / 加水分解酵素; 酸無水物に作用; 酸無水物に作用・細胞または細胞小器官の運動に関与 / SH3 domain binding / structural constituent of cytoskeleton / cytoplasmic ribonucleoprotein granule / nucleosome / lamellipodium / actin cytoskeleton / regulation of cell shape / actin binding / actin cytoskeleton organization / protein-containing complex assembly / cytoplasmic vesicle / cytoskeleton / regulation of cell cycle / postsynaptic density / axon / ribonucleoprotein complex / signaling receptor binding / focal adhesion / synapse / protein kinase binding / perinuclear region of cytoplasm / glutamatergic synapse / protein-containing complex / ATP hydrolysis activity / ATP binding / identical protein binding 類似検索 - 分子機能 | |||||||||
生物種 | ![]() ![]() | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.5 Å | |||||||||
![]() | Li N / Chen S / Gao N | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural basis of membrane skeleton organization in red blood cells. 著者: Ningning Li / Siyi Chen / Kui Xu / Meng-Ting He / Meng-Qiu Dong / Qiangfeng Cliff Zhang / Ning Gao / ![]() 要旨: The spectrin-based membrane skeleton is a ubiquitous membrane-associated two-dimensional cytoskeleton underneath the lipid membrane of metazoan cells. Mutations of skeleton proteins impair the ...The spectrin-based membrane skeleton is a ubiquitous membrane-associated two-dimensional cytoskeleton underneath the lipid membrane of metazoan cells. Mutations of skeleton proteins impair the mechanical strength and functions of the membrane, leading to several different types of human diseases. Here, we report the cryo-EM structures of the native spectrin-actin junctional complex (from porcine erythrocytes), which is a specialized short F-actin acting as the central organizational unit of the membrane skeleton. While an α-/β-adducin hetero-tetramer binds to the barbed end of F-actin as a flexible cap, tropomodulin and SH3BGRL2 together create an absolute cap at the pointed end. The junctional complex is strengthened by ring-like structures of dematin in the middle actin layers and by patterned periodic interactions with tropomyosin over its entire length. This work serves as a structural framework for understanding the assembly and dynamics of membrane skeleton and offers insights into mechanisms of various ubiquitous F-actin-binding factors in other F-actin systems. | |||||||||
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マップデータ | ![]() | 398.9 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 28.2 KB 28.2 KB | 表示 表示 | ![]() |
FSC (解像度算出) | ![]() | 16.9 KB | 表示 | ![]() |
画像 | ![]() | 29.7 KB | ||
Filedesc metadata | ![]() | 9.4 KB | ||
その他 | ![]() ![]() | 391.5 MB 391.5 MB | ||
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 | ![]() 8iaiMC ![]() 8iahC ![]() 8ib2C M: このマップから作成された原子モデル 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
EMDBのページ | ![]() ![]() |
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「今月の分子」の関連する項目 |
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マップ
ファイル | ![]() | ||||||||||||||||||||||||||||||||||||
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投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 1.37 Å | ||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
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-添付データ
-ハーフマップ: #2
ファイル | emd_35302_half_map_1.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: #1
ファイル | emd_35302_half_map_2.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
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試料の構成要素
+全体 : Spectrin-actin junctional complex
+超分子 #1: Spectrin-actin junctional complex
+分子 #1: Adducin 1
+分子 #2: Beta-adducin
+分子 #3: Dematin actin binding protein
+分子 #4: Actin, cytoplasmic 1
+分子 #5: Spectrin beta chain
+分子 #6: Tropomyosin-1.9
+分子 #7: Tropomyosin 3
+分子 #8: Tropomodulin-1
+分子 #9: SH3 domain-binding glutamic acid-rich-like protein
+分子 #10: ADENOSINE-5'-DIPHOSPHATE
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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試料調製
緩衝液 | pH: 7.5 |
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凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % |
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電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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撮影 | フィルム・検出器のモデル: GATAN K2 QUANTUM (4k x 4k) 検出モード: SUPER-RESOLUTION / 平均電子線量: 34.4 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 3.0 µm / 最小 デフォーカス(公称値): 2.0 µm |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |