+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 6dlv | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
タイトル | Cryo-EM of the GTP-bound human dynamin-1 polymer assembled on the membrane in the super constricted state | |||||||||
要素 | Dynamin-1 | |||||||||
キーワード | ENDOCYTOSIS / HYDROLASE / dynamin family / gtpase / pleckstrin homology domain / membrane protein | |||||||||
機能・相同性 | 機能・相同性情報 clathrin coat assembly involved in endocytosis / vesicle scission / synaptic vesicle budding from presynaptic endocytic zone membrane / presynaptic endocytic zone membrane / dynamin GTPase / chromaffin granule / regulation of vesicle size / Toll Like Receptor 4 (TLR4) Cascade / Retrograde neurotrophin signalling / endosome organization ...clathrin coat assembly involved in endocytosis / vesicle scission / synaptic vesicle budding from presynaptic endocytic zone membrane / presynaptic endocytic zone membrane / dynamin GTPase / chromaffin granule / regulation of vesicle size / Toll Like Receptor 4 (TLR4) Cascade / Retrograde neurotrophin signalling / endosome organization / Formation of annular gap junctions / photoreceptor ribbon synapse / Gap junction degradation / membrane coat / Recycling pathway of L1 / phosphatidylinositol-3,4,5-trisphosphate binding / endocytic vesicle / EPH-ephrin mediated repulsion of cells / clathrin-coated pit / phosphatidylinositol-4,5-bisphosphate binding / MHC class II antigen presentation / photoreceptor inner segment / receptor-mediated endocytosis / cell projection / modulation of chemical synaptic transmission / protein homooligomerization / receptor internalization / endocytosis / GDP binding / Clathrin-mediated endocytosis / presynapse / microtubule binding / protein homotetramerization / microtubule / GTPase activity / glutamatergic synapse / synapse / GTP binding / protein kinase binding / protein homodimerization activity / RNA binding / extracellular exosome / identical protein binding / plasma membrane / cytoplasm 類似検索 - 分子機能 | |||||||||
生物種 | Homo sapiens (ヒト) | |||||||||
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: 10.1 Å | |||||||||
データ登録者 | Kong, L. / Wang, H. / Fang, S. / Canagarajah, B. / Kehr, A.D. / Rice, W.J. / Hinshaw, J.E. | |||||||||
資金援助 | 米国, 2件
| |||||||||
引用 | ジャーナル: Nature / 年: 2018 タイトル: Cryo-EM of the dynamin polymer assembled on lipid membrane. 著者: Leopold Kong / Kem A Sochacki / Huaibin Wang / Shunming Fang / Bertram Canagarajah / Andrew D Kehr / William J Rice / Marie-Paule Strub / Justin W Taraska / Jenny E Hinshaw / 要旨: Membrane fission is a fundamental process in the regulation and remodelling of cell membranes. Dynamin, a large GTPase, mediates membrane fission by assembling around, constricting and cleaving the ...Membrane fission is a fundamental process in the regulation and remodelling of cell membranes. Dynamin, a large GTPase, mediates membrane fission by assembling around, constricting and cleaving the necks of budding vesicles. Here we report a 3.75 Å resolution cryo-electron microscopy structure of the membrane-associated helical polymer of human dynamin-1 in the GMPPCP-bound state. The structure defines the helical symmetry of the dynamin polymer and the positions of its oligomeric interfaces, which were validated by cell-based endocytosis assays. Compared to the lipid-free tetramer form, membrane-associated dynamin binds to the lipid bilayer with its pleckstrin homology domain (PHD) and self-assembles across the helical rungs via its guanine nucleotide-binding (GTPase) domain. Notably, interaction with the membrane and helical assembly are accommodated by a severely bent bundle signalling element (BSE), which connects the GTPase domain to the rest of the protein. The BSE conformation is asymmetric across the inter-rung GTPase interface, and is unique compared to all known nucleotide-bound states of dynamin. The structure suggests that the BSE bends as a result of forces generated from the GTPase dimer interaction that are transferred across the stalk to the PHD and lipid membrane. Mutations that disrupted the BSE kink impaired endocytosis. We also report a 10.1 Å resolution cryo-electron microscopy map of a super-constricted dynamin polymer showing localized conformational changes at the BSE and GTPase domains, induced by GTP hydrolysis, that drive membrane constriction. Together, our results provide a structural basis for the mechanism of action of dynamin on the lipid membrane. | |||||||||
履歴 |
|
-構造の表示
ムービー |
ムービービューア |
---|---|
構造ビューア | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 6dlv.cif.gz | 477.9 KB | 表示 | PDBx/mmCIF形式 |
---|---|---|---|---|
PDB形式 | pdb6dlv.ent.gz | 400 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 6dlv.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
その他 | その他のダウンロード |
-検証レポート
文書・要旨 | 6dlv_validation.pdf.gz | 881 KB | 表示 | wwPDB検証レポート |
---|---|---|---|---|
文書・詳細版 | 6dlv_full_validation.pdf.gz | 884.1 KB | 表示 | |
XML形式データ | 6dlv_validation.xml.gz | 67.3 KB | 表示 | |
CIF形式データ | 6dlv_validation.cif.gz | 106.1 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/dl/6dlv ftp://data.pdbj.org/pub/pdb/validation_reports/dl/6dlv | HTTPS FTP |
-関連構造データ
-リンク
-集合体
登録構造単位 |
|
---|---|
1 |
|
対称性 | らせん対称: (回転対称性: 1 / Dyad axis: no / N subunits divisor: 1 / Num. of operations: 15 / Rise per n subunits: 14.63 Å / Rotation per n subunits: 26.14 °) |
-要素
#1: タンパク質 | 分子量: 85859.148 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: DNM1, DNM / 発現宿主: Trichoplusia ni (イラクサキンウワバ) / 参照: UniProt: Q05193, dynamin GTPase |
---|
-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: らせん対称体再構成法 |
-試料調製
構成要素 | 名称: GTP-bound human dynamin helical polymer encased around phosphatidylserine lipid bilayer membrane tube タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
---|---|
分子量 | 値: 98 kDa/nm / 実験値: YES |
由来(天然) | 生物種: Homo sapiens (ヒト) |
由来(組換発現) | 生物種: Trichoplusia ni (イラクサキンウワバ) |
緩衝液 | pH: 7.2 |
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 |
-電子顕微鏡撮影
顕微鏡 | モデル: FEI TECNAI 20 |
---|---|
電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 200 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD |
撮影 | 電子線照射量: 36 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
-解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
---|---|
らせん対称 | 回転角度/サブユニット: 26.14 ° / 軸方向距離/サブユニット: 14.63 Å / らせん対称軸の対称性: C1 |
3次元再構成 | 解像度: 10.1 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 14322 / 対称性のタイプ: HELICAL |