+
データを開く
-
基本情報
登録情報 | データベース: PDB / ID: 7pdz | ||||||
---|---|---|---|---|---|---|---|
タイトル | Structure of capping protein bound to the barbed end of a cytoplasmic actin filament | ||||||
![]() |
| ||||||
![]() | STRUCTURAL PROTEIN / Cytoskeleton / cell-shape remodelling / barbed end | ||||||
機能・相同性 | ![]() cytoskeletal calyx / regulation of protein kinase C signaling / Cell-extracellular matrix interactions / Formation of the dystrophin-glycoprotein complex (DGC) / Adherens junctions interactions / Advanced glycosylation endproduct receptor signaling / B-WICH complex positively regulates rRNA expression / RHOF GTPase cycle / Gap junction degradation / Formation of annular gap junctions ...cytoskeletal calyx / regulation of protein kinase C signaling / Cell-extracellular matrix interactions / Formation of the dystrophin-glycoprotein complex (DGC) / Adherens junctions interactions / Advanced glycosylation endproduct receptor signaling / B-WICH complex positively regulates rRNA expression / RHOF GTPase cycle / Gap junction degradation / Formation of annular gap junctions / RHOD GTPase cycle / MAP2K and MAPK activation / RHOF GTPase cycle / COPI-independent Golgi-to-ER retrograde traffic / EPHB-mediated forward signaling / Regulation of actin dynamics for phagocytic cup formation / RHO GTPases Activate WASPs and WAVEs / HSP90 chaperone cycle for steroid hormone receptors (SHR) in the presence of ligand / RHO GTPases activate IQGAPs / RHO GTPases Activate Formins / F-actin capping protein complex / WASH complex / COPI-mediated anterograde transport / sperm head-tail coupling apparatus / DNA Damage Recognition in GG-NER / UCH proteinases / sperm head / VEGFA-VEGFR2 Pathway / Factors involved in megakaryocyte development and platelet production / structural constituent of postsynaptic actin cytoskeleton / Clathrin-mediated endocytosis / barbed-end actin filament capping / dense body / cell projection organization / cell junction assembly / MHC class II antigen presentation / actin polymerization or depolymerization / muscle cell development / regulation of cell morphogenesis / lamellipodium assembly / negative regulation of microtubule polymerization / NuA4 histone acetyltransferase complex / cortical cytoskeleton / beta-tubulin binding / brush border / asymmetric synapse / intercalated disc / cytoskeleton organization / axonogenesis / hippocampal mossy fiber to CA3 synapse / actin filament / 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 / Z disc / neuron projection development / cell-cell junction / lamellipodium / actin cytoskeleton / actin binding / cytoskeleton / hydrolase activity / postsynaptic density / axon / focal adhesion / synapse / protein kinase binding / protein-containing complex / ATP binding / nucleus / membrane / plasma membrane / cytosol / cytoplasm 類似検索 - 分子機能 | ||||||
生物種 | ![]() ![]() ![]() ![]() synthetic construct (人工物) | ||||||
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: 3.8 Å | ||||||
![]() | Funk, J. / Merino, F. / Schacks, M. / Rottner, K. / Raunser, S. / Bieling, P. | ||||||
資金援助 | ![]()
| ||||||
![]() | ![]() タイトル: A barbed end interference mechanism reveals how capping protein promotes nucleation in branched actin networks. 著者: Johanna Funk / Felipe Merino / Matthias Schaks / Klemens Rottner / Stefan Raunser / Peter Bieling / ![]() 要旨: Heterodimeric capping protein (CP/CapZ) is an essential factor for the assembly of branched actin networks, which push against cellular membranes to drive a large variety of cellular processes. Aside ...Heterodimeric capping protein (CP/CapZ) is an essential factor for the assembly of branched actin networks, which push against cellular membranes to drive a large variety of cellular processes. Aside from terminating filament growth, CP potentiates the nucleation of actin filaments by the Arp2/3 complex in branched actin networks through an unclear mechanism. Here, we combine structural biology with in vitro reconstitution to demonstrate that CP not only terminates filament elongation, but indirectly stimulates the activity of Arp2/3 activating nucleation promoting factors (NPFs) by preventing their association to filament barbed ends. Key to this function is one of CP's C-terminal "tentacle" extensions, which sterically masks the main interaction site of the terminal actin protomer. Deletion of the β tentacle only modestly impairs capping. However, in the context of a growing branched actin network, its removal potently inhibits nucleation promoting factors by tethering them to capped filament ends. End tethering of NPFs prevents their loading with actin monomers required for activation of the Arp2/3 complex and thus strongly inhibits branched network assembly both in cells and reconstituted motility assays. Our results mechanistically explain how CP couples two opposed processes-capping and nucleation-in branched actin network assembly. | ||||||
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 | ![]() | 481.2 KB | 表示 | ![]() |
---|---|---|---|---|
PDB形式 | ![]() | 410.6 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 |
---|
-関連構造データ
-
リンク
-
集合体
登録構造単位 | ![]()
|
---|---|
1 |
|
-
要素
-タンパク質 , 3種, 8分子 EFIJKLNO
#1: タンパク質 | 分子量: 30669.768 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() ![]() |
---|---|
#2: タンパク質 | 分子量: 32980.703 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() ![]() |
#3: タンパク質 | 分子量: 41795.680 Da / 分子数: 6 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
-タンパク質・ペプチド , 1種, 5分子 QRSTP
#4: タンパク質・ペプチド |
---|
-非ポリマー , 3種, 16分子 




#5: 化合物 | ChemComp-ADP / #6: 化合物 | ChemComp-MG / #7: 化合物 | ChemComp-PO4 / |
---|
-詳細
研究の焦点であるリガンドがあるか | Y |
---|
-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: PARTICLE / 3次元再構成法: 単粒子再構成法 |
-
試料調製
構成要素 | 名称: Complex between capping protein and the barbed end of cytoplasmic actin filaments タイプ: COMPLEX / Entity ID: #1-#4 / 由来: MULTIPLE SOURCES | |||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
分子量 | 実験値: NO | |||||||||||||||||||||||||
緩衝液 | pH: 7 / 詳細: KMEI buffer | |||||||||||||||||||||||||
緩衝液成分 |
| |||||||||||||||||||||||||
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | |||||||||||||||||||||||||
試料支持 | 詳細: Mild discharging with 5 mA current / グリッドの材料: COPPER / グリッドのタイプ: Quantifoil 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: 286 K |
-
電子顕微鏡撮影
実験機器 | ![]() モデル: Talos Arctica / 画像提供: FEI Company |
---|---|
顕微鏡 | モデル: FEI TALOS ARCTICA |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / Cs: 2.7 mm / アライメント法: COMA FREE |
試料ホルダ | 凍結剤: NITROGEN |
撮影 | 平均露光時間: 3 sec. / 電子線照射量: 60 e/Å2 / 検出モード: INTEGRATING フィルム・検出器のモデル: FEI FALCON III (4k x 4k) 撮影したグリッド数: 2 / 実像数: 4204 |
-
解析
EMソフトウェア |
| ||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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: 570724 | ||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.8 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 60206 / アルゴリズム: BACK PROJECTION / クラス平均像の数: 1 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | B value: 40 / プロトコル: FLEXIBLE FIT / 空間: REAL | ||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 5ADX |