+
データを開く
-
基本情報
登録情報 | データベース: PDB / ID: 6uc0 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
タイトル | Isolated S3D-cofilin bound to an actin filament | |||||||||
![]() |
| |||||||||
![]() | STRUCTURAL PROTEIN / Cytoskeleton | |||||||||
機能・相同性 | ![]() cellular response to ether / cofilin-actin rod / positive regulation of protein localization to cell leading edge / positive regulation of establishment of cell polarity regulating cell shape / negative regulation of unidimensional cell growth / positive regulation of barbed-end actin filament capping / neural fold formation / negative regulation of lamellipodium assembly / negative regulation of postsynaptic density organization / actin filament fragmentation ...cellular response to ether / cofilin-actin rod / positive regulation of protein localization to cell leading edge / positive regulation of establishment of cell polarity regulating cell shape / negative regulation of unidimensional cell growth / positive regulation of barbed-end actin filament capping / neural fold formation / negative regulation of lamellipodium assembly / negative regulation of postsynaptic density organization / actin filament fragmentation / positive regulation of actin filament depolymerization / positive regulation of embryonic development / modification of postsynaptic actin cytoskeleton / negative regulation of actin filament bundle assembly / positive regulation of synaptic plasticity / negative regulation of actin filament depolymerization / actin filament severing / establishment of spindle localization / negative regulation of cell motility / regulation of dendritic spine morphogenesis / cell projection organization / host-mediated activation of viral process / actin filament depolymerization / negative regulation of cell adhesion / RHO GTPases Activate ROCKs / negative regulation of cell size / cellular response to interleukin-6 / regulation of cell morphogenesis / negative regulation of dendritic spine maintenance / neural crest cell migration / positive regulation of cell motility / cytoskeletal motor activator activity / cortical actin cytoskeleton / phosphatidylinositol bisphosphate binding / myosin heavy chain binding / cellular response to insulin-like growth factor stimulus / tropomyosin binding / establishment of cell polarity / positive regulation of dendritic spine development / troponin I binding / filamentous actin / mesenchyme migration / actin filament bundle / mitotic cytokinesis / lamellipodium membrane / positive regulation of proteolysis / actin filament bundle assembly / skeletal muscle myofibril / striated muscle thin filament / skeletal muscle thin filament assembly / actin monomer binding / Sema3A PAK dependent Axon repulsion / cellular response to interleukin-1 / positive regulation of focal adhesion assembly / Rho protein signal transduction / response to amino acid / postsynaptic density, intracellular component / positive regulation of lamellipodium assembly / skeletal muscle fiber development / stress fiber / titin binding / actin filament polymerization / cytoskeleton organization / EPHB-mediated forward signaling / Gene and protein expression by JAK-STAT signaling after Interleukin-12 stimulation / cellular response to epidermal growth factor stimulus / response to activity / hippocampus development / filopodium / actin filament / synaptic membrane / mitochondrial membrane / Regulation of actin dynamics for phagocytic cup formation / 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 / response to virus / ruffle membrane / nuclear matrix / cellular response to hydrogen peroxide / protein import into nucleus / calcium-dependent protein binding / actin filament binding / Platelet degranulation / cellular response to tumor necrosis factor / cell-cell junction / lamellipodium / actin cytoskeleton / actin cytoskeleton organization / cell body / growth cone / positive regulation of cell growth / protein phosphatase binding / vesicle / dendritic spine / hydrolase activity / protein domain specific binding / signaling receptor binding / focal adhesion / neuronal cell body / calcium ion binding / positive regulation of gene expression 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: 7.5 Å | |||||||||
![]() | Huehn, A.R. / Bibeau, J.P. / Schramm, A.C. / Cao, W. / De La Cruz, E.M. / Sindelar, C.V. | |||||||||
資金援助 | ![]()
| |||||||||
![]() | ![]() タイトル: Structures of cofilin-induced structural changes reveal local and asymmetric perturbations of actin filaments. 著者: Andrew R Huehn / Jeffrey P Bibeau / Anthony C Schramm / Wenxiang Cao / Enrique M De La Cruz / Charles V Sindelar / ![]() 要旨: Members of the cofilin/ADF family of proteins sever actin filaments, increasing the number of filament ends available for polymerization or depolymerization. Cofilin binds actin filaments with ...Members of the cofilin/ADF family of proteins sever actin filaments, increasing the number of filament ends available for polymerization or depolymerization. Cofilin binds actin filaments with positive cooperativity, forming clusters of contiguously bound cofilin along the filament lattice. Filament severing occurs preferentially at boundaries between bare and cofilin-decorated (cofilactin) segments and is biased at 1 side of a cluster. A molecular understanding of cooperative binding and filament severing has been impeded by a lack of structural data describing boundaries. Here, we apply methods for analyzing filament cryo-electron microscopy (cryo-EM) data at the single subunit level to directly investigate the structure of boundaries within partially decorated cofilactin filaments. Subnanometer resolution maps of isolated, bound cofilin molecules and an actin-cofilactin boundary indicate that cofilin-induced actin conformational changes are local and limited to subunits directly contacting bound cofilin. An isolated, bound cofilin compromises longitudinal filament contacts of 1 protofilament, consistent with a single cofilin having filament-severing activity. An individual, bound phosphomimetic (S3D) cofilin with weak severing activity adopts a unique binding mode that does not perturb actin structure. Cofilin clusters disrupt both protofilaments, consistent with a higher severing activity at boundaries compared to single cofilin. Comparison of these structures indicates that this disruption is substantially greater at pointed end sides of cofilactin clusters than at the barbed end. These structures, with the distribution of bound cofilin clusters, suggest that maximum binding cooperativity is achieved when 2 cofilins occupy adjacent sites. These results reveal the structural origins of cooperative cofilin binding and actin filament severing. | |||||||||
履歴 |
|
-
構造の表示
ムービー |
![]() |
---|---|
構造ビューア | 分子: ![]() ![]() |
-
ダウンロードとリンク
-
ダウンロード
PDBx/mmCIF形式 | ![]() | 468.3 KB | 表示 | ![]() |
---|---|---|---|---|
PDB形式 | ![]() | 390.7 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 | ![]() | 1.8 MB | 表示 | ![]() |
---|---|---|---|---|
文書・詳細版 | ![]() | 1.8 MB | 表示 | |
XML形式データ | ![]() | 94.8 KB | 表示 | |
CIF形式データ | ![]() | 134.2 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
-
リンク
-
集合体
登録構造単位 | ![]()
|
---|---|
1 |
|
-
要素
#1: タンパク質 | 分子量: 42096.953 Da / 分子数: 7 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #2: タンパク質 | | 分子量: 18560.541 Da / 分子数: 1 / Mutation: S3D / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #3: 化合物 | ChemComp-MG / #4: 化合物 | ChemComp-ADP / 研究の焦点であるリガンドがあるか | N | 配列の詳細 | The molecules in the experiments were: Rabbit actin (UniProt P68135) and Human cofilin-1 (UniProt ...The molecules in the experiments were: Rabbit actin (UniProt P68135) and Human cofilin-1 (UniProt P23528), however the sequences modeled in the coordinates correspond to the sequences from Chicken actin and Chicken cofilin-2 since those were pdb models of homolog molecules used to fit into the cryo-EM density maps. | |
---|
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
---|---|
EM実験 | 試料の集合状態: HELICAL ARRAY / 3次元再構成法: 単粒子再構成法 |
-
試料調製
構成要素 |
| ||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
分子量 | 実験値: NO | ||||||||||||||||||||||||||||
由来(天然) |
| ||||||||||||||||||||||||||||
由来(組換発現) | 生物種: ![]() ![]() | ||||||||||||||||||||||||||||
緩衝液 | pH: 6.8 | ||||||||||||||||||||||||||||
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||||||||||
急速凍結 | 装置: HOMEMADE PLUNGER / 凍結剤: ETHANE |
-
電子顕微鏡撮影
実験機器 | ![]() モデル: Tecnai F20 / 画像提供: FEI Company |
---|---|
顕微鏡 | モデル: FEI TECNAI F20 |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD |
撮影 | 電子線照射量: 50 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
-
解析
EMソフトウェア | 名称: ![]() | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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: 217500 詳細: Both bare and S3D-cofilin-decorated filament segments were selected and initially refined together. | ||||||||||||||||||
3次元再構成 | 解像度: 7.5 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 20082 詳細: Segments with isolated, bound S3D-cofilin were split into even and odd halves for FSC calculations. クラス平均像の数: 1 / 対称性のタイプ: POINT | ||||||||||||||||||
原子モデル構築 | 3D fitting-ID: 1 / Source name: PDB / タイプ: experimental model
|