複合体: Two DNase I molecules, each bound to the ultimate and penultimate actin subunits of the F-actin pointed end.
タンパク質・ペプチド: Deoxyribonuclease-1
リガンド: ADENOSINE-5'-DIPHOSPHATE
リガンド: MAGNESIUM ION
リガンド: PHOSPHATE ION
キーワード
actin / phalloidin / filament / pointed end / DNase I / STRUCTURAL PROTEIN
機能・相同性
機能・相同性情報
Cell-extracellular matrix interactions / Adherens junctions interactions / Formation of the dystrophin-glycoprotein complex (DGC) / regulation of neutrophil mediated cytotoxicity / B-WICH complex positively regulates rRNA expression / zymogen granule / Gap junction degradation / Formation of annular gap junctions / MAP2K and MAPK activation / regulation of acute inflammatory response ...Cell-extracellular matrix interactions / Adherens junctions interactions / Formation of the dystrophin-glycoprotein complex (DGC) / regulation of neutrophil mediated cytotoxicity / B-WICH complex positively regulates rRNA expression / zymogen granule / Gap junction degradation / Formation of annular gap junctions / MAP2K and MAPK activation / regulation of acute inflammatory response / RHOF GTPase cycle / EPHB-mediated forward signaling / Regulation of actin dynamics for phagocytic cup formation / RHO GTPases Activate WASPs and WAVEs / RHO GTPases activate IQGAPs / RHO GTPases Activate Formins / deoxyribonuclease I / DNA Damage Recognition in GG-NER / UCH proteinases / deoxyribonuclease I activity / cellular response to cytochalasin B / VEGFA-VEGFR2 Pathway / neutrophil activation involved in immune response / regulation of transepithelial transport / morphogenesis of a polarized epithelium / structural constituent of postsynaptic actin cytoskeleton / protein localization to adherens junction / Clathrin-mediated endocytosis / dense body / postsynaptic actin cytoskeleton / Tat protein binding / adherens junction assembly / DNA catabolic process / apical protein localization / tight junction / regulation of norepinephrine uptake / apical junction complex / transporter regulator activity / nitric-oxide synthase binding / establishment or maintenance of cell polarity / cortical cytoskeleton / NuA4 histone acetyltransferase complex / brush border / kinesin binding / regulation of synaptic vesicle endocytosis / regulation of protein localization to plasma membrane / positive regulation of double-strand break repair via homologous recombination / axonogenesis / calyx of Held / nitric-oxide synthase regulator activity / actin filament / adherens junction / cell motility / 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 / Schaffer collateral - CA1 synapse / cytoplasmic ribonucleoprotein granule / nuclear envelope / nucleosome / actin cytoskeleton / lamellipodium / actin binding / cytoskeleton / regulation of cell cycle / ribonucleoprotein complex / axon / focal adhesion / apoptotic process / synapse / protein kinase binding / glutamatergic synapse / protein-containing complex / ATP hydrolysis activity / DNA binding / extracellular region / ATP binding / identical protein binding / nucleus / membrane / plasma membrane / cytosol / cytoplasm 類似検索 - 分子機能
Deoxyribonuclease I / Deoxyribonuclease I, active site / Deoxyribonuclease I, conservied site / Deoxyribonuclease I signature 2. / Deoxyribonuclease I signature 1. / deoxyribonuclease I / Endonuclease/exonuclease/phosphatase / Endonuclease/Exonuclease/phosphatase family / Endonuclease/exonuclease/phosphatase superfamily / Actins signature 1. ...Deoxyribonuclease I / Deoxyribonuclease I, active site / Deoxyribonuclease I, conservied site / Deoxyribonuclease I signature 2. / Deoxyribonuclease I signature 1. / deoxyribonuclease I / Endonuclease/exonuclease/phosphatase / Endonuclease/Exonuclease/phosphatase family / Endonuclease/exonuclease/phosphatase superfamily / Actins signature 1. / Actin, conserved site / Actins signature 2. / Actin/actin-like conserved site / Actins and actin-related proteins signature. / Actin / Actin family / Actin / ATPase, nucleotide binding domain 類似検索 - ドメイン・相同性
ジャーナル: Nat Commun / 年: 2024 タイトル: Phalloidin and DNase I-bound F-actin pointed end structures reveal principles of filament stabilization and disassembly. 著者: Micaela Boiero Sanders / Wout Oosterheert / Oliver Hofnagel / Peter Bieling / Stefan Raunser / 要旨: Actin filament turnover involves subunits binding to and dissociating from the filament ends, with the pointed end being the primary site of filament disassembly. Several molecules modulate filament ...Actin filament turnover involves subunits binding to and dissociating from the filament ends, with the pointed end being the primary site of filament disassembly. Several molecules modulate filament turnover, but the underlying mechanisms remain incompletely understood. Here, we present three cryo-EM structures of the F-actin pointed end in the presence and absence of phalloidin or DNase I. The two terminal subunits at the undecorated pointed end adopt a twisted conformation. Phalloidin can still bind and bridge these subunits, inducing a conformational shift to a flattened, F-actin-like state. This explains how phalloidin prevents depolymerization at the pointed end. Interestingly, two DNase I molecules simultaneously bind to the phalloidin-stabilized pointed end. In the absence of phalloidin, DNase I binding would disrupt the terminal actin subunit packing, resulting in filament disassembly. Our findings uncover molecular principles of pointed end regulation and provide structural insights into the kinetic asymmetry between the actin filament ends.
複合体: Two DNase I molecules, each bound to the ultimate and penultimate actin subunits of the F-actin pointed end.
タンパク質・ペプチド: Deoxyribonuclease-1
リガンド: ADENOSINE-5'-DIPHOSPHATE
リガンド: MAGNESIUM ION
リガンド: PHOSPHATE ION
+
超分子 #1: F-actin pointed end bound by DNase I and phalloidin.
超分子
名称: F-actin pointed end bound by DNase I and phalloidin. タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1-#3 詳細: Bovine beta/gamma-actin was purified from bovine thymus, phalloidin (from Amanita phalloides) was bought from Sigma, DNase I was bought from Serva. The components were mixed to assemble the ...詳細: Bovine beta/gamma-actin was purified from bovine thymus, phalloidin (from Amanita phalloides) was bought from Sigma, DNase I was bought from Serva. The components were mixed to assemble the complex prior to cryo-EM grid preparation.
+
超分子 #2: Actin filament pointed end
超分子
名称: Actin filament pointed end / タイプ: complex / ID: 2 / 親要素: 1 / 含まれる分子: #1 詳細: The four terminal subunits of the pointed end of the actin filament.
由来(天然)
生物種: Bos taurus (ウシ) / 器官: Thymus
+
超分子 #3: Phalloidin
超分子
名称: Phalloidin / タイプ: complex / ID: 3 / 親要素: 1 / 含まれる分子: #3 詳細: Toxin from Amanita phalloides that stabilizes the actin filament.
由来(天然)
生物種: Amanita phalloides (タマゴテングタケ)
+
超分子 #4: Two DNase I molecules, each bound to the ultimate and penultimate...
超分子
名称: Two DNase I molecules, each bound to the ultimate and penultimate actin subunits of the F-actin pointed end. タイプ: complex / ID: 4 / 親要素: 1 / 含まれる分子: #2 / 詳細: Bovine DNase I was bought from Serva.