+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 6tz4 | ||||||||||||||||||
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タイトル | CryoEM reconstruction of membrane-bound ESCRT-III filament composed of CHMP1B+IST1 (right-handed) | ||||||||||||||||||
要素 |
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キーワード | LIPID BINDING PROTEIN / membrane remodeling / membrane-bound protein filament / ESCRT-III | ||||||||||||||||||
機能・相同性 | 機能・相同性情報 MIT domain binding / abscission / multivesicular body-lysosome fusion / amphisome membrane / vesicle fusion with vacuole / ESCRT III complex disassembly / late endosome to lysosome transport / ESCRT III complex / kinetochore microtubule / endosome transport via multivesicular body sorting pathway ...MIT domain binding / abscission / multivesicular body-lysosome fusion / amphisome membrane / vesicle fusion with vacuole / ESCRT III complex disassembly / late endosome to lysosome transport / ESCRT III complex / kinetochore microtubule / endosome transport via multivesicular body sorting pathway / cytoskeleton-dependent cytokinesis / regulation of centrosome duplication / collateral sprouting / nuclear membrane reassembly / positive regulation of collateral sprouting / Sealing of the nuclear envelope (NE) by ESCRT-III / midbody abscission / multivesicular body sorting pathway / plasma membrane repair / membrane coat / membrane fission / late endosome to vacuole transport / multivesicular body membrane / ubiquitin-dependent protein catabolic process via the multivesicular body sorting pathway / regulation of mitotic spindle assembly / multivesicular body assembly / Flemming body / mitotic metaphase chromosome alignment / nucleus organization / viral budding via host ESCRT complex / positive regulation of proteolysis / endoplasmic reticulum-Golgi intermediate compartment / autophagosome membrane / autophagosome maturation / nuclear pore / multivesicular body / viral budding from plasma membrane / establishment of protein localization / kinetochore / autophagy / azurophil granule lumen / protein localization / protein transport / nuclear envelope / midbody / endosome membrane / cadherin binding / protein domain specific binding / lysosomal membrane / cell division / intracellular membrane-bounded organelle / centrosome / Neutrophil degranulation / protein-containing complex binding / chromatin / extracellular exosome / extracellular region / nucleoplasm / identical protein binding / plasma membrane / cytosol 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: 3.2 Å | ||||||||||||||||||
データ登録者 | Nguyen, H.C. / Frost, A. | ||||||||||||||||||
資金援助 | 米国, 5件
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引用 | ジャーナル: Nat Struct Mol Biol / 年: 2020 タイトル: Membrane constriction and thinning by sequential ESCRT-III polymerization. 著者: Henry C Nguyen / Nathaniel Talledge / John McCullough / Abhimanyu Sharma / Frank R Moss / Janet H Iwasa / Michael D Vershinin / Wesley I Sundquist / Adam Frost / 要旨: The endosomal sorting complexes required for transport (ESCRTs) mediate diverse membrane remodeling events. These typically require ESCRT-III proteins to stabilize negatively curved membranes; ...The endosomal sorting complexes required for transport (ESCRTs) mediate diverse membrane remodeling events. These typically require ESCRT-III proteins to stabilize negatively curved membranes; however, recent work has indicated that certain ESCRT-IIIs also participate in positive-curvature membrane-shaping reactions. ESCRT-IIIs polymerize into membrane-binding filaments, but the structural basis for negative versus positive membrane remodeling by these proteins remains poorly understood. To learn how certain ESCRT-IIIs shape positively curved membranes, we determined structures of human membrane-bound CHMP1B-only, membrane-bound CHMP1B + IST1, and IST1-only filaments by cryo-EM. Our structures show how CHMP1B first polymerizes into a single-stranded helical filament, shaping membranes into moderate-curvature tubules. Subsequently, IST1 assembles a second strand on CHMP1B, further constricting the membrane tube and reducing its diameter nearly to the fission point. Each step of constriction thins the underlying bilayer, lowering the barrier to membrane fission. Our structures reveal how a two-component, sequential polymerization mechanism drives membrane tubulation, constriction and bilayer thinning. | ||||||||||||||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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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 | 6tz4.cif.gz | 2 MB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb6tz4.ent.gz | 表示 | PDB形式 | |
PDBx/mmJSON形式 | 6tz4.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 | 6tz4_validation.pdf.gz | 2.1 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 6tz4_full_validation.pdf.gz | 2.1 MB | 表示 | |
XML形式データ | 6tz4_validation.xml.gz | 297 KB | 表示 | |
CIF形式データ | 6tz4_validation.cif.gz | 408.2 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/tz/6tz4 ftp://data.pdbj.org/pub/pdb/validation_reports/tz/6tz4 | HTTPS FTP |
-関連構造データ
関連構造データ | 20588MC 6tz5C 6tz9C 6tzaC 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 (文献) |
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類似構造データ | |
電子顕微鏡画像生データ | EMPIAR-10396 (タイトル: CryoEM reconstruction of membrane-bound ESCRT-III filament composed of CHMP1B+IST1 (right-handed) Data size: 30.6 Data #1: Processed particle stack for a cryoEM helical reconstruction of membrane-bound ESCRT-III filament composed of CHMP1B+IST1 (right-handed) [picked particles - multiframe - processed]) |
-リンク
-集合体
登録構造単位 |
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1 |
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対称性 | らせん対称: (回転対称性: 1 / Dyad axis: no / N subunits divisor: 1 / Num. of operations: 36 / Rise per n subunits: 2.96 Å / Rotation per n subunits: 20.02 °) |
-要素
#1: タンパク質 | 分子量: 22140.354 Da / 分子数: 36 / 変異: K37E / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: CHMP1B, C18orf2 / 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: Q7LBR1 #2: タンパク質 | 分子量: 21574.281 Da / 分子数: 36 / Fragment: N-terminal domain (UNP residues 1-189) / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: IST1, KIAA0174 / 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: P53990 |
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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 |
-試料調製
構成要素 | 名称: membrane-bound ESCRT-III copolymer filament composed of CHMP1B and IST1 タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
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分子量 | 実験値: NO |
由来(天然) | 生物種: Homo sapiens (ヒト) |
由来(組換発現) | 生物種: Escherichia coli (大腸菌) |
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 |
試料支持 | 詳細: unspecified |
急速凍結 | 装置: FEI VITROBOT MARK III / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 292 K 詳細: Grids were blotted with Whatman No. 1 filter paper for 4-8 seconds with a 0 mm offset at 19C and 100 percent humidity before plunging into liquid ethane |
-電子顕微鏡撮影
実験機器 | モデル: Tecnai Polara / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI POLARA 300 |
電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 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: 44 e/Å2 / 検出モード: SUPER-RESOLUTION フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
-解析
EMソフトウェア |
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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: 20.02 ° / 軸方向距離/サブユニット: 2.96 Å / らせん対称軸の対称性: C1 | ||||||||||||||||||
3次元再構成 | 解像度: 3.2 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 61974 / 対称性のタイプ: HELICAL |