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基本情報
登録情報 | データベース: PDB / ID: 7xrd | ||||||
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タイトル | Cryo-EM structure of Arf6 helical polymer assembled on lipid membrane | ||||||
![]() | ADP-ribosylation factor 6 | ||||||
![]() | LIPID BINDING PROTEIN / small GTPase / helical polymer / membrane tubulation | ||||||
機能・相同性 | ![]() erythrocyte apoptotic process / maintenance of postsynaptic density structure / protein localization to cleavage furrow / positive regulation of mitotic cytokinetic process / negative regulation of dendrite development / establishment of epithelial cell polarity / regulation of dendritic spine development / regulation of Rac protein signal transduction / protein localization to endosome / negative regulation of protein localization to cell surface ...erythrocyte apoptotic process / maintenance of postsynaptic density structure / protein localization to cleavage furrow / positive regulation of mitotic cytokinetic process / negative regulation of dendrite development / establishment of epithelial cell polarity / regulation of dendritic spine development / regulation of Rac protein signal transduction / protein localization to endosome / negative regulation of protein localization to cell surface / negative regulation of receptor-mediated endocytosis / ruffle assembly / positive regulation of keratinocyte migration / positive regulation of focal adhesion disassembly / regulation of filopodium assembly / endocytic recycling / MET receptor recycling / thioesterase binding / Flemming body / filopodium membrane / protein localization to cell surface / TBC/RABGAPs / cortical actin cytoskeleton organization / positive regulation of actin filament polymerization / hepatocyte apoptotic process / cleavage furrow / synaptic vesicle endocytosis / endocytic vesicle / regulation of presynapse assembly / vesicle-mediated transport / ruffle / signaling adaptor activity / liver development / small monomeric GTPase / protein localization to plasma membrane / positive regulation of protein secretion / positive regulation of protein localization to plasma membrane / intracellular protein transport / cellular response to nerve growth factor stimulus / positive regulation of neuron projection development / recycling endosome membrane / GDP binding / nervous system development / presynapse / Clathrin-mediated endocytosis / G protein activity / midbody / cell cortex / early endosome membrane / cell differentiation / postsynapse / endosome / cell adhesion / cell division / focal adhesion / GTPase activity / GTP binding / glutamatergic synapse / Golgi apparatus / extracellular exosome / membrane / plasma membrane / cytosol / cytoplasm 類似検索 - 分子機能 | ||||||
生物種 | ![]() | ||||||
手法 | 電子顕微鏡法 / らせん対称体再構成法 / クライオ電子顕微鏡法 / 解像度: 3.9 Å | ||||||
![]() | Pang, X.Y. / Zhang, Y. / Sun, F. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural elucidation of how ARF small GTPases induce membrane tubulation for vesicle fission. 著者: Xiaoyun Pang / Yan Zhang / Kunyou Park / Zhenyu Liao / Jian Li / Jiashu Xu / Minh-Triet Hong / Guoliang Yin / Tongming Zhang / Yaoyu Wang / Edward H Egelman / Jun Fan / Victor W Hsu / Seung- ...著者: Xiaoyun Pang / Yan Zhang / Kunyou Park / Zhenyu Liao / Jian Li / Jiashu Xu / Minh-Triet Hong / Guoliang Yin / Tongming Zhang / Yaoyu Wang / Edward H Egelman / Jun Fan / Victor W Hsu / Seung-Yeol Park / Fei Sun / ![]() ![]() ![]() 要旨: ADP-Ribosylation Factor (ARF) small GTPases have been found to act in vesicle fission through a direct ability to tubulate membrane. We have pursued cryoelectron microscopy (EM) to reveal at 3.9 Å ...ADP-Ribosylation Factor (ARF) small GTPases have been found to act in vesicle fission through a direct ability to tubulate membrane. We have pursued cryoelectron microscopy (EM) to reveal at 3.9 Å resolution how ARF6 assembles into a protein lattice on tubulated membrane. Molecular dynamics simulation studies confirm and extend the cryo-EM findings. The ARF6 lattice exhibits features that are distinct from those formed by other membrane-bending proteins. We identify protein contacts critical for lattice assembly and how membrane insertion results in constricted tubules. The lattice structure also enables docking by GTPase-activating proteins (GAP) to achieve vesiculation. We have also modeled ARF1 onto the ARF6 lattice, and then pursued vesicle reconstitution by the Coat Protein I (COPI) complex to further confirm that the ARF lattice acts in vesicle fission. By elucidating how an ARF protein tubulates membrane at the structural level, we have advanced the molecular understanding of how this class of transport factors promote the fission stage of vesicle formation. | ||||||
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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 | ![]() | 132.3 KB | 表示 | ![]() |
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その他 | ![]() |
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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 | ![]() 33414MC 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
#1: タンパク質 | 分子量: 21050.121 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #2: 化合物 | ChemComp-MG / #3: 化合物 | ChemComp-GTP / 研究の焦点であるリガンドがあるか | Y | Has protein modification | N | |
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-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: HELICAL ARRAY / 3次元再構成法: らせん対称体再構成法 |
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試料調製
構成要素 | 名称: Arf6 helical polymer assembled on lipid membrane / タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT |
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由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() ![]() |
緩衝液 | pH: 7.4 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 凍結剤: ETHANE |
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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 / 倍率(公称値): 75000 X / 最大 デフォーカス(公称値): 2200 nm / 最小 デフォーカス(公称値): 1500 nm |
撮影 | 電子線照射量: 50 e/Å2 フィルム・検出器のモデル: FEI FALCON III (4k x 4k) |
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解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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らせん対称 | 回転角度/サブユニット: 27.28 ° / 軸方向距離/サブユニット: 28.01 Å / らせん対称軸の対称性: C5 |
3次元再構成 | 解像度: 3.9 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 20820 / 対称性のタイプ: HELICAL |