+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 7znj | |||||||||
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タイトル | Structure of an ALYREF-exon junction complex hexamer | |||||||||
要素 |
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キーワード | GENE REGULATION / transcription-exort complex / TREX / splicing / exon junction complex / EJC / RNA export / RNA binding proteins | |||||||||
機能・相同性 | 機能・相同性情報 exon-exon junction subcomplex mago-y14 / transcription export complex / negative regulation of selenocysteine incorporation / regulation of nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / C5-methylcytidine-containing RNA reader activity / cellular response to selenite ion / selenocysteine insertion sequence binding / exon-exon junction complex / regulation of translation at postsynapse, modulating synaptic transmission / negative regulation of excitatory postsynaptic potential ...exon-exon junction subcomplex mago-y14 / transcription export complex / negative regulation of selenocysteine incorporation / regulation of nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / C5-methylcytidine-containing RNA reader activity / cellular response to selenite ion / selenocysteine insertion sequence binding / exon-exon junction complex / regulation of translation at postsynapse, modulating synaptic transmission / negative regulation of excitatory postsynaptic potential / Z-decay: degradation of maternal mRNAs by zygotically expressed factors / regulation of mRNA processing / Deadenylation of mRNA / embryonic cranial skeleton morphogenesis / Transport of the SLBP independent Mature mRNA / Transport of the SLBP Dependant Mature mRNA / M-decay: degradation of maternal mRNAs by maternally stored factors / poly(A) binding / mRNA 3'-end processing / Transport of Mature mRNA Derived from an Intronless Transcript / U2-type catalytic step 1 spliceosome / RNA export from nucleus / Transport of Mature mRNA derived from an Intron-Containing Transcript / RNA Polymerase II Transcription Termination / exploration behavior / nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / regulation of alternative mRNA splicing, via spliceosome / associative learning / carbohydrate transmembrane transporter activity / mRNA export from nucleus / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / ribonucleoprotein complex binding / cellular response to brain-derived neurotrophic factor stimulus / catalytic step 2 spliceosome / mRNA Splicing - Major Pathway / RNA splicing / positive regulation of translation / response to organic cyclic compound / mRNA splicing, via spliceosome / ISG15 antiviral mechanism / Regulation of expression of SLITs and ROBOs / mRNA processing / osteoblast differentiation / RNA stem-loop binding / rRNA processing / regulation of translation / outer membrane-bounded periplasmic space / postsynapse / RNA helicase activity / negative regulation of translation / RNA helicase / nuclear speck / mRNA binding / neuronal cell body / glutamatergic synapse / dendrite / nucleolus / ATP hydrolysis activity / RNA binding / extracellular exosome / nucleoplasm / ATP binding / membrane / nucleus / cytosol / cytoplasm 類似検索 - 分子機能 | |||||||||
生物種 | Homo sapiens (ヒト) | |||||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 2.4 Å | |||||||||
データ登録者 | Pacheco-Fiallos, F.B. / Vorlaender, M.K. / Plaschka, C. | |||||||||
資金援助 | European Union, 2件
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引用 | ジャーナル: Nature / 年: 2023 タイトル: mRNA recognition and packaging by the human transcription-export complex. 著者: Belén Pacheco-Fiallos / Matthias K Vorländer / Daria Riabov-Bassat / Laura Fin / Francis J O'Reilly / Farja I Ayala / Ulla Schellhaas / Juri Rappsilber / Clemens Plaschka / 要旨: Newly made mRNAs are processed and packaged into mature ribonucleoprotein complexes (mRNPs) and are recognized by the essential transcription-export complex (TREX) for nuclear export. However, the ...Newly made mRNAs are processed and packaged into mature ribonucleoprotein complexes (mRNPs) and are recognized by the essential transcription-export complex (TREX) for nuclear export. However, the mechanisms of mRNP recognition and three-dimensional mRNP organization are poorly understood. Here we report cryo-electron microscopy and tomography structures of reconstituted and endogenous human mRNPs bound to the 2-MDa TREX complex. We show that mRNPs are recognized through multivalent interactions between the TREX subunit ALYREF and mRNP-bound exon junction complexes. Exon junction complexes can multimerize through ALYREF, which suggests a mechanism for mRNP organization. Endogenous mRNPs form compact globules that are coated by multiple TREX complexes. These results reveal how TREX may simultaneously recognize, compact and protect mRNAs to promote their packaging for nuclear export. The organization of mRNP globules provides a framework to understand how mRNP architecture facilitates mRNA biogenesis and export. | |||||||||
履歴 |
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-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
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-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 7znj.cif.gz | 899.8 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb7znj.ent.gz | 700.7 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7znj.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 | 7znj_validation.pdf.gz | 1.7 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 7znj_full_validation.pdf.gz | 1.7 MB | 表示 | |
XML形式データ | 7znj_validation.xml.gz | 113 KB | 表示 | |
CIF形式データ | 7znj_validation.cif.gz | 174.5 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/zn/7znj ftp://data.pdbj.org/pub/pdb/validation_reports/zn/7znj | HTTPS FTP |
-関連構造データ
関連構造データ | 14803MC 7znkC 7znlC 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 | 類似検索 - 機能・相同性F&H 検索 |
-リンク
-集合体
登録構造単位 |
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1 |
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-要素
-タンパク質 , 4種, 24分子 AaFfKkBbGgLlCcHhMmDdIiNn
#1: タンパク質 | 分子量: 43819.367 Da / 分子数: 6 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: EIF4A3, DDX48, KIAA0111 / 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: P38919 #2: タンパク質 | 分子量: 17189.625 Da / 分子数: 6 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: MAGOH, MAGOHA / 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: P61326 #3: タンパク質 | 分子量: 10370.525 Da / 分子数: 6 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: RBM8A, RBM8, HSPC114, MDS014 / 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: Q9Y5S9 #4: タンパク質 | 分子量: 57598.855 Da / 分子数: 6 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: malE, Z5632, ECs5017, ALYREF, ALY, BEF, THOC4 / 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: P0AEY0, UniProt: Q86V81 |
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-RNA鎖 , 1種, 6分子 EeJjOo
#5: RNA鎖 | 分子量: 1792.037 Da / 分子数: 6 / 由来タイプ: 合成 / 由来: (合成) Homo sapiens (ヒト) |
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-非ポリマー , 2種, 12分子
#6: 化合物 | ChemComp-MG / #7: 化合物 | ChemComp-ANP / |
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-詳細
研究の焦点であるリガンドがあるか | 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: PARTICLE / 3次元再構成法: 単粒子再構成法 |
-試料調製
構成要素 | 名称: Hexameric complex between the TREX subunit ALYREF and the exon junction complex タイプ: COMPLEX 詳細: Assembled with truncated MBP-tagged ALYREF (residues 55-183) Entity ID: #1-#5 / 由来: RECOMBINANT |
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分子量 | 値: 0.65 MDa / 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: 7.9 |
試料 | 濃度: 1.7 mg/ml / 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
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: 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 / 最大 デフォーカス(公称値): 2500 nm / 最小 デフォーカス(公称値): 600 nm / Cs: 2.7 mm / アライメント法: COMA FREE |
試料ホルダ | 凍結剤: NITROGEN 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
撮影 | 電子線照射量: 40 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
-解析
ソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
対称性 | 点対称性: D3 (2回x3回 2面回転対称) | ||||||||||||||||||||||||
3次元再構成 | 解像度: 2.4 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 1564602 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
精密化 | 交差検証法: NONE 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 16.44 Å2 | ||||||||||||||||||||||||
拘束条件 |
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