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基本情報
登録情報 | ![]() | |||||||||||||||
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タイトル | Single particle cryo-EM structure of the Chaetomium thermophilum Nup188-Nic96 complex (Nup188 residues 1-1858; Nic96 residues 240-301) | |||||||||||||||
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機能・相同性 | ![]() structural constituent of nuclear pore / poly(A)+ mRNA export from nucleus / mRNA transport / ![]() ![]() ![]() 類似検索 - 分子機能 | |||||||||||||||
生物種 | ![]() ![]() | |||||||||||||||
手法 | ![]() ![]() | |||||||||||||||
![]() | Petrovic S / Samanta D / Perriches T / Bley CJ / Thierbach K / Brown B / Nie S / Mobbs GW / Stevens TA / Liu X ...Petrovic S / Samanta D / Perriches T / Bley CJ / Thierbach K / Brown B / Nie S / Mobbs GW / Stevens TA / Liu X / Tomaleri GP / Schaus L / Hoelz A | |||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Architecture of the linker-scaffold in the nuclear pore. 著者: Stefan Petrovic / Dipanjan Samanta / Thibaud Perriches / Christopher J Bley / Karsten Thierbach / Bonnie Brown / Si Nie / George W Mobbs / Taylor A Stevens / Xiaoyu Liu / Giovani Pinton ...著者: Stefan Petrovic / Dipanjan Samanta / Thibaud Perriches / Christopher J Bley / Karsten Thierbach / Bonnie Brown / Si Nie / George W Mobbs / Taylor A Stevens / Xiaoyu Liu / Giovani Pinton Tomaleri / Lucas Schaus / André Hoelz / ![]() 要旨: INTRODUCTION In eukaryotic cells, the selective bidirectional transport of macromolecules between the nucleus and cytoplasm occurs through the nuclear pore complex (NPC). Embedded in nuclear envelope ...INTRODUCTION In eukaryotic cells, the selective bidirectional transport of macromolecules between the nucleus and cytoplasm occurs through the nuclear pore complex (NPC). Embedded in nuclear envelope pores, the ~110-MDa human NPC is an ~1200-Å-wide and ~750-Å-tall assembly of ~1000 proteins, collectively termed nucleoporins. Because of the NPC's eightfold rotational symmetry along the nucleocytoplasmic axis, each of the ~34 different nucleoporins occurs in multiples of eight. Architecturally, the NPC's symmetric core is composed of an inner ring encircling the central transport channel and two outer rings anchored on both sides of the nuclear envelope. Because of its central role in the flow of genetic information from DNA to RNA to protein, the NPC is commonly targeted in viral infections and its nucleoporin constituents are associated with a plethora of diseases. RATIONALE Although the arrangement of most scaffold nucleoporins in the NPC's symmetric core was determined by quantitative docking of crystal structures into cryo-electron tomographic (cryo-ET) maps of intact NPCs, the topology and molecular details of their cohesion by multivalent linker nucleoporins have remained elusive. Recently, in situ cryo-ET reconstructions of NPCs from various species have indicated that the NPC's inner ring is capable of reversible constriction and dilation in response to variations in nuclear envelope membrane tension, thereby modulating the diameter of the central transport channel by ~200 Å. We combined biochemical reconstitution, high-resolution crystal and single-particle cryo-electron microscopy (cryo-EM) structure determination, docking into cryo-ET maps, and physiological validation to elucidate the molecular architecture of the linker-scaffold interaction network that not only is essential for the NPC's integrity but also confers the plasticity and robustness necessary to allow and withstand such large-scale conformational changes. RESULTS By biochemically mapping scaffold-binding regions of all fungal and human linker nucleoporins and determining crystal and single-particle cryo-EM structures of linker-scaffold complexes, we completed the characterization of the biochemically tractable linker-scaffold network and established its evolutionary conservation, despite considerable sequence divergence. We determined a series of crystal and single-particle cryo-EM structures of the intact Nup188 and Nup192 scaffold hubs bound to their Nic96, Nup145N, and Nup53 linker nucleoporin binding regions, revealing that both proteins form distinct question mark-shaped keystones of two evolutionarily conserved hetero‑octameric inner ring complexes. Linkers bind to scaffold surface pockets through short defined motifs, with flanking regions commonly forming additional disperse interactions that reinforce the binding. Using a structure‑guided functional analysis in , we confirmed the robustness of linker‑scaffold interactions and established the physiological relevance of our biochemical and structural findings. The near-atomic composite structures resulting from quantitative docking of experimental structures into human and cryo-ET maps of constricted and dilated NPCs structurally disambiguated the positioning of the Nup188 and Nup192 hubs in the intact fungal and human NPC and revealed the topology of the linker-scaffold network. The linker-scaffold gives rise to eight relatively rigid inner ring spokes that are flexibly interconnected to allow for the formation of lateral channels. Unexpectedly, we uncovered that linker‑scaffold interactions play an opposing role in the outer rings by forming tight cross-link staples between the eight nuclear and cytoplasmic outer ring spokes, thereby limiting the dilatory movements to the inner ring. CONCLUSION We have substantially advanced the structural and biochemical characterization of the symmetric core of the and human NPCs and determined near-atomic composite structures. The composite structures uncover the molecular mechanism by which the evolutionarily conserved linker‑scaffold establishes the NPC's integrity while simultaneously allowing for the observed plasticity of the central transport channel. The composite structures are roadmaps for the mechanistic dissection of NPC assembly and disassembly, the etiology of NPC‑associated diseases, the role of NPC dilation in nucleocytoplasmic transport of soluble and integral membrane protein cargos, and the anchoring of asymmetric nucleoporins. [Figure: see text]. | |||||||||||||||
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構造の表示
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ダウンロードとリンク
-EMDBアーカイブ
マップデータ | ![]() | 118.1 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 26.3 KB 26.3 KB | 表示 表示 | ![]() |
FSC (解像度算出) | ![]() | 12 KB | 表示 | ![]() |
画像 | ![]() | 59.9 KB | ||
マスクデータ | ![]() | 149.9 MB | ![]() | |
Filedesc metadata | ![]() | 7.6 KB | ||
その他 | ![]() ![]() ![]() ![]() | 3.9 MB 86.5 MB 84.9 MB 84.9 MB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 7mvyMC ![]() 7mvtC ![]() 7mvuC ![]() 7mvvC ![]() 7mvwC ![]() 7mvxC ![]() 7mvzC ![]() 7mw0C ![]() 7mw1C ![]() 7tbiC ![]() 7tbjC ![]() 7tbkC M: このマップから作成された原子モデル 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
EMDBのページ | ![]() ![]() |
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「今月の分子」の関連する項目 |
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マップ
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注釈 | Unsharpened map generated with Relion Auto-refine | ||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 0.972 Å | ||||||||||||||||||||
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対称性 | 空間群: 1 | ||||||||||||||||||||
詳細 | EMDB XML:
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-添付データ
-マスク #1
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密度ヒストグラム |
-追加マップ: LocScale locally sharpened map (model B-factor based scaling)
ファイル | emd_24058_additional_1.map | ||||||||||||
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注釈 | LocScale locally sharpened map (model B-factor based scaling) | ||||||||||||
投影像・断面図 |
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密度ヒストグラム |
-追加マップ: Sharpened map generated with Relion PostProcess
ファイル | emd_24058_additional_2.map | ||||||||||||
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注釈 | Sharpened map generated with Relion PostProcess | ||||||||||||
投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: Half-dataset map generated with Relion Auto-refine
ファイル | emd_24058_half_map_1.map | ||||||||||||
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注釈 | Half-dataset map generated with Relion Auto-refine | ||||||||||||
投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: Half-dataset map generated with Relion Auto-refine
ファイル | emd_24058_half_map_2.map | ||||||||||||
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注釈 | Half-dataset map generated with Relion Auto-refine | ||||||||||||
投影像・断面図 |
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密度ヒストグラム |
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試料の構成要素
-全体 : Nup188-Nic96 heterodimer
全体 | 名称: Nup188-Nic96 heterodimer |
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要素 |
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-超分子 #1: Nup188-Nic96 heterodimer
超分子 | 名称: Nup188-Nic96 heterodimer / タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 211.2 KDa |
-分子 #1: Nucleoporin NUP188
分子 | 名称: Nucleoporin NUP188 / タイプ: protein_or_peptide / ID: 1 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() 株: DSM 1495 / CBS 144.50 / IMI 039719 |
分子量 | 理論値: 204.429719 KDa |
組換発現 | 生物種: ![]() ![]() ![]() |
配列 | 文字列: GPHNMATLTD RTYLPPLEDC LTGRTVILSW RLVASALEDA DLARLTSPAL STFLRDGFVH ELLKHPARVF EPKDLKQEFE TKTSSIQTV APGVDTIKKD ALWLADAVAI NQVAALRIVL IEYQTRAHSH LVLPLSTQDV ANIQEAAGVG DAHASSILSL L NPASAVDA ...文字列: GPHNMATLTD RTYLPPLEDC LTGRTVILSW RLVASALEDA DLARLTSPAL STFLRDGFVH ELLKHPARVF EPKDLKQEFE TKTSSIQTV APGVDTIKKD ALWLADAVAI NQVAALRIVL IEYQTRAHSH LVLPLSTQDV ANIQEAAGVG DAHASSILSL L NPASAVDA ETMWCDFETE ARRRERILAT YLSERRSFTA AVDALVTFLL HSAPGQHKDL DSLRRALLKD AFAFDEDLDV PD RSKLLTM APTYMNLVED CIARAQALPA KLGESFKTEA FELDWLRTAI TEAVHSLSIA FQALDLDTPY FAPHELLSEW FEL MNSSLF LESILGFEVV ADLAMPARSL VSAICLKMLN IDRTIQFLHD FDYPDGEEPY LLSSQTLNKI HTAVTNAVNS GVAA SLPVA FAWSLIVHQM HLGYQERAER RDLLVNQRAQ AGFELEFQPS ASTPNRRRRN SAGSIVSLEA SPYDDFLREQ RLDND IAPV EQIAMLATSR GQVYQVMSEM ALCLGTTHEA AFRPAVGARA RLVFQDLLKR SAYLIPYQDE PVFSLLAILA TGRQYW DVT DALSASSLNQ VYTDMLDDET LFTQFTMQAI NRFPYEFNPF SVLCRVLAAA LITNKDKADV VTGWLWRTPT LTVDWNP AW DRSYELCFED ENTNSFRLTR DVDLFGSASP ARPRHLAAEE RFIIPEGTLG RFVTDVGRTA RLEFEHSALA LLGKRLEV K AAEEICDSGM APLDVDEQAE AVAMLATVLR AESLKSTAKG GDPEAPLKFL KEASRLLPHN KDILTVISDT IDGLVEKEL LELDGPQIAV LASCLQFLHA ALAVCPGRVW AYMSRCALIA GDARPGRLSR ITGSLDMYAE RFDLLSSAVK LFAALIDSAA CSAVQRRAG STALVSVRSA VENPWLGTSE KILSRVALAI AQAALDVYES TTTWRFRSEL DRSILVRDVV GLMHKLVVHA H TLSSHLTS TLSPAAAHII SSFLTPPPSA SSLRFQPLLG TLLVALITPR ATLYPGQSRI LAERVTSVLA FCTSLLRAAD FL GQTHIPL QTHLFQSACL LARLPAANAV YRAPVLELLR ALVEVAGRAA NGSGEPPSLL GYLGSHAARS FISLVEGIDK PFG RVEHAV VTWRFFAAVI RNRQQWMAGC LLTGRTPREA LKGGGEQKIE RKVGEGSVLA AAMERLREVK SLDVQEAVAV MDFV VSAQN YWPWTIFAVR KEKEVVDALR GYVRGLKAPG MVMKTDGAAA AAFQARIAAY VAETFAMQLY HMRQMRQAEK FAGEL VADL DYFLREGVMV WGYNASLHGN FARNFAKRFP GVEVDDFKRT MWLPRELGKG YYYALEVAEQ MLGFDAGWGG VKQSGF RKE METANLNLSL VEAQVSLFHA WEYLLLELTL SLLPKKENAA FARQVLQVVE QCLEANQRSQ PPENIFVVLG HARAGLA LT LLQRLADANQ LPRDVTHLLA LVSSAIHAVE NPFGANDLPY FRTLLKILFV VLRAAKQGTA KPGESNVAIT QQVLTILD R VVARCFRALA ALVHEQQQNA TDGTTTAPED LALITAILQA CLSVPGIEQC QVQVLNIMAA HDVFQVAVAL FSWADRLLP ANPSPASSST STSATNPASG DPVYGELALL FLLELSALPA LAEHLACDGL LGHLAAARLA GYMRRTNVGP FAENAGAARC YAIWAKCLL PLLLNILAAL GSTVAPEVAW VLNQFPNLLQ SSVERIEPPG FSRPTLSLAS TPPRQKFISL LEISEIHSLA L LTRVLAAC RAQNARDVPE VTWDGAKVLE CVEYWLRGRK VLRERLVPLG PREVEWRGMV ATGGVVGVAG DGGEGCENRL EE KAVGLLV GVREVLEGGL EGEGE UniProtKB: Nucleoporin NUP188 |
-分子 #2: Nucleoporin NIC96
分子 | 名称: Nucleoporin NIC96 / タイプ: protein_or_peptide / ID: 2 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() 株: DSM 1495 / CBS 144.50 / IMI 039719 |
分子量 | 理論値: 7.173938 KDa |
組換発現 | 生物種: ![]() ![]() ![]() |
配列 | 文字列: SGTGLGEVDV DTYLSNLQTK TTLSMIADGL ERSARDFDAF LEENVTLEWE AQRKRIYQHF GIK UniProtKB: Nucleoporin NIC96 |
-実験情報
-構造解析
手法 | ![]() |
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試料の集合状態 | particle |
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試料調製
濃度 | 0.5 mg/mL | ||||||||||||
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緩衝液 | pH: 8 構成要素:
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グリッド | モデル: Quantifoil R2/2 / 材質: COPPER / メッシュ: 300 | ||||||||||||
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 277 K / 装置: FEI VITROBOT MARK IV |
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電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD![]() |
特殊光学系 | エネルギーフィルター - 名称: GIF Bioquantum |
試料ステージ | ホルダー冷却材: NITROGEN |
撮影 | フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 撮影したグリッド数: 1 / 実像数: 10740 / 平均露光時間: 2.0 sec. / 平均電子線量: 103.0 e/Å2 |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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画像解析
-原子モデル構築 1
精密化 | 空間: REAL / プロトコル: OTHER |
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得られたモデル | ![]() PDB-7mvy: |
-原子モデル構築 2
精密化 | 空間: REAL / プロトコル: OTHER |
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得られたモデル | ![]() PDB-7mvy: |