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基本情報
登録情報 | データベース: PDB / ID: 9azp | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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タイトル | INF2 at the Barbed End of F-Actin with Incoming Profilin-Actin | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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![]() | CYTOSOLIC PROTEIN / Actin / Filament / Elongation / Ends | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
機能・相同性 | ![]() synapse maturation / modification of postsynaptic actin cytoskeleton / negative regulation of actin filament bundle assembly / adenyl-nucleotide exchange factor activity / positive regulation of actin filament bundle assembly / negative regulation of actin filament polymerization / regulation of actin filament polymerization / Signaling by ROBO receptors / positive regulation of ATP-dependent activity / proline-rich region binding ...synapse maturation / modification of postsynaptic actin cytoskeleton / negative regulation of actin filament bundle assembly / adenyl-nucleotide exchange factor activity / positive regulation of actin filament bundle assembly / negative regulation of actin filament polymerization / regulation of actin filament polymerization / Signaling by ROBO receptors / positive regulation of ATP-dependent activity / proline-rich region binding / positive regulation of ruffle assembly / PCP/CE pathway / negative regulation of stress fiber assembly / cytoskeletal motor activator activity / positive regulation of actin filament polymerization / myosin heavy chain binding / tropomyosin binding / regulation of mitochondrial fission / troponin I binding / filamentous actin / mesenchyme migration / actin filament bundle / actin filament bundle assembly / skeletal muscle myofibril / striated muscle thin filament / skeletal muscle thin filament assembly / positive regulation of epithelial cell migration / actin monomer binding / stress fiber / skeletal muscle fiber development / titin binding / phosphatidylinositol-4,5-bisphosphate binding / actin filament polymerization / phosphotyrosine residue binding / filopodium / actin filament / neural tube closure / RHO GTPases Activate Formins / modulation of chemical synaptic transmission / small GTPase binding / 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 / calcium-dependent protein binding / Platelet degranulation / lamellipodium / actin binding / cell body / actin cytoskeleton organization / cell cortex / blood microparticle / cytoskeleton / hydrolase activity / protein stabilization / cadherin binding / protein domain specific binding / focal adhesion / calcium ion binding / positive regulation of gene expression / regulation of transcription by RNA polymerase II / perinuclear region of cytoplasm / glutamatergic synapse / magnesium ion binding / RNA binding / extracellular exosome / ATP binding / identical protein binding / nucleus / membrane / 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: 3.79 Å | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() | Palmer, N.J. / Barrie, K.R. / Dominguez, R. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Mechanisms of actin filament severing and elongation by formins. 著者: Nicholas J Palmer / Kyle R Barrie / Roberto Dominguez / ![]() 要旨: Humans express 15 formins that play crucial roles in actin-based processes, including cytokinesis, cell motility and mechanotransduction. However, the lack of structures bound to the actin filament ...Humans express 15 formins that play crucial roles in actin-based processes, including cytokinesis, cell motility and mechanotransduction. However, the lack of structures bound to the actin filament (F-actin) has been a major impediment to understanding formin function. Whereas formins are known for their ability to nucleate and elongate F-actin, some formins can additionally depolymerize, sever or bundle F-actin. Two mammalian formins, inverted formin 2 (INF2) and diaphanous 1 (DIA1, encoded by DIAPH1), exemplify this diversity. INF2 shows potent severing activity but elongates weakly whereas DIA1 has potent elongation activity but does not sever. Using cryo-electron microscopy (cryo-EM) we show five structural states of INF2 and two of DIA1 bound to the middle and barbed end of F-actin. INF2 and DIA1 bind differently to these sites, consistent with their distinct activities. The formin-homology 2 and Wiskott-Aldrich syndrome protein-homology 2 (FH2 and WH2, respectively) domains of INF2 are positioned to sever F-actin, whereas DIA1 appears unsuited for severing. These structures also show how profilin-actin is delivered to the fast-growing barbed end, and how this is followed by a transition of the incoming monomer into the F-actin conformation and the release of profilin. Combined, the seven structures presented here provide step-by-step visualization of the mechanisms of F-actin severing and elongation by formins. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 637.6 KB | 表示 | ![]() |
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PDB形式 | ![]() | 508.8 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 | ![]() 44018MC ![]() 9az4C ![]() 9azqC ![]() 9b03C ![]() 9b0kC ![]() 9b27C ![]() 9b3dC 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
-タンパク質 , 3種, 10分子 ABCDEFIGHJ
#1: タンパク質 | 分子量: 41387.227 Da / 分子数: 7 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() 参照: UniProt: P68135, 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 #2: タンパク質 | 分子量: 135778.828 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #3: タンパク質 | | 分子量: 14940.021 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() |
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-非ポリマー , 3種, 14分子 




#4: 化合物 | ChemComp-ADP / #5: 化合物 | ChemComp-MG / #6: 化合物 | ChemComp-ATP / | |
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-詳細
研究の焦点であるリガンドがあるか | N |
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Has protein modification | Y |
-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 |
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分子量 |
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由来(天然) |
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由来(組換発現) |
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緩衝液 | pH: 8 | ||||||||||||||||||||||||
緩衝液成分 |
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試料 | 濃度: 1.45 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: COPPER / 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 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 277 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 / 最大 デフォーカス(公称値): 2500 nm / 最小 デフォーカス(公称値): 500 nm |
試料ホルダ | 凍結剤: NITROGEN 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
撮影 | 電子線照射量: 44 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 実像数: 41926 |
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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 | ||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.79 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 20093 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||
拘束条件 |
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