+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 5zya | |||||||||
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タイトル | SF3b spliceosomal complex bound to E7107 | |||||||||
要素 |
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キーワード | SPLICING / Splicing Modulator / SF3b sub-complex | |||||||||
機能・相同性 | 機能・相同性情報 U11/U12 snRNP / B-WICH complex / splicing factor binding / U12-type spliceosomal complex / RNA splicing, via transesterification reactions / U2-type spliceosomal complex / U2-type precatalytic spliceosome / U2-type prespliceosome assembly / U2 snRNP / SAGA complex ...U11/U12 snRNP / B-WICH complex / splicing factor binding / U12-type spliceosomal complex / RNA splicing, via transesterification reactions / U2-type spliceosomal complex / U2-type precatalytic spliceosome / U2-type prespliceosome assembly / U2 snRNP / SAGA complex / positive regulation of transcription by RNA polymerase III / U2-type prespliceosome / precatalytic spliceosome / positive regulation of transcription by RNA polymerase I / mRNA Splicing - Minor Pathway / spliceosomal complex assembly / regulation of RNA splicing / U2 snRNA binding / regulation of DNA repair / catalytic step 2 spliceosome / mRNA Splicing - Major Pathway / RNA splicing / stem cell differentiation / spliceosomal complex / B-WICH complex positively regulates rRNA expression / negative regulation of protein catabolic process / mRNA splicing, via spliceosome / nuclear matrix / nuclear speck / chromatin remodeling / mRNA binding / protein-containing complex binding / nucleolus / positive regulation of DNA-templated transcription / positive regulation of transcription by RNA polymerase II / DNA binding / RNA binding / zinc ion binding / nucleoplasm / nucleus 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: 3.95 Å | |||||||||
データ登録者 | Finci, L.I. / Larsen, N.A. | |||||||||
資金援助 | 中国, 1件
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引用 | ジャーナル: Genes Dev / 年: 2018 タイトル: The cryo-EM structure of the SF3b spliceosome complex bound to a splicing modulator reveals a pre-mRNA substrate competitive mechanism of action. 著者: Lorenzo I Finci / Xiaofeng Zhang / Xiuliang Huang / Qiang Zhou / Jennifer Tsai / Teng Teng / Anant Agrawal / Betty Chan / Sean Irwin / Craig Karr / Andrew Cook / Ping Zhu / Dominic Reynolds / ...著者: Lorenzo I Finci / Xiaofeng Zhang / Xiuliang Huang / Qiang Zhou / Jennifer Tsai / Teng Teng / Anant Agrawal / Betty Chan / Sean Irwin / Craig Karr / Andrew Cook / Ping Zhu / Dominic Reynolds / Peter G Smith / Peter Fekkes / Silvia Buonamici / Nicholas A Larsen / 要旨: Somatic mutations in spliceosome proteins lead to dysregulated RNA splicing and are observed in a variety of cancers. These genetic aberrations may offer a potential intervention point for targeted ...Somatic mutations in spliceosome proteins lead to dysregulated RNA splicing and are observed in a variety of cancers. These genetic aberrations may offer a potential intervention point for targeted therapeutics. SF3B1, part of the U2 small nuclear RNP (snRNP), is targeted by splicing modulators, including E7107, the first to enter clinical trials, and, more recently, H3B-8800. Modulating splicing represents a first-in-class opportunity in drug discovery, and elucidating the structural basis for the mode of action opens up new possibilities for structure-based drug design. Here, we present the cryogenic electron microscopy (cryo-EM) structure of the SF3b subcomplex (SF3B1, SF3B3, PHF5A, and SF3B5) bound to E7107 at 3.95 Å. This structure shows that E7107 binds in the branch point adenosine-binding pocket, forming close contacts with key residues that confer resistance upon mutation: SF3B1 and PHF5A The structure suggests a model in which splicing modulators interfere with branch point adenosine recognition and supports a substrate competitive mechanism of action (MOA). Using several related chemical probes, we validate the pose of the compound and support their substrate competitive MOA by comparing their activity against both strong and weak pre-mRNA substrates. Finally, we present functional data and structure-activity relationship (SAR) on the PHF5A mutation that sensitizes cells to some chemical probes but not others. Developing small molecule splicing modulators represents a promising therapeutic approach for a variety of diseases, and this work provides a significant step in enabling structure-based drug design for these elaborate natural products. Importantly, this work also demonstrates that the utilization of cryo-EM in drug discovery is coming of age. | |||||||||
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 | 5zya.cif.gz | 399.5 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb5zya.ent.gz | 311.1 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 5zya.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 | 5zya_validation.pdf.gz | 984.6 KB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 5zya_full_validation.pdf.gz | 1015.7 KB | 表示 | |
XML形式データ | 5zya_validation.xml.gz | 61.8 KB | 表示 | |
CIF形式データ | 5zya_validation.cif.gz | 92.9 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/zy/5zya ftp://data.pdbj.org/pub/pdb/validation_reports/zy/5zya | HTTPS FTP |
-関連構造データ
-リンク
-集合体
登録構造単位 |
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1 |
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-要素
-Splicing factor 3B subunit ... , 3種, 3分子 BCA
#1: タンパク質 | 分子量: 10149.369 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: SF3B5 発現宿主: Spodoptera frugiperda (ツマジロクサヨトウ) 参照: UniProt: Q9BWJ5 |
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#2: タンパク質 | 分子量: 146024.938 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: SF3B1 発現宿主: Spodoptera frugiperda (ツマジロクサヨトウ) 参照: UniProt: O75533 |
#4: タンパク質 | 分子量: 136471.562 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: SF3B3 発現宿主: Spodoptera frugiperda (ツマジロクサヨトウ) 参照: UniProt: Q15393 |
-タンパク質 , 1種, 1分子 D
#3: タンパク質 | 分子量: 9394.955 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PHF5A 発現宿主: Spodoptera frugiperda (ツマジロクサヨトウ) 参照: UniProt: Q7RTV0 |
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-非ポリマー , 3種, 5分子
#5: 化合物 | ChemComp-9B0 / [( | ||
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#6: 化合物 | #7: 化合物 | ChemComp-K / | |
-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: SF3b Sub-complex / タイプ: COMPLEX / Entity ID: #1-#2, #4 / 由来: RECOMBINANT |
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由来(天然) | 生物種: Homo sapiens (ヒト) |
由来(組換発現) | 生物種: Spodoptera frugiperda (ツマジロクサヨトウ) |
緩衝液 | pH: 8 |
試料 | 濃度: 1 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 |
撮影 | 電子線照射量: 55 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
-解析
ソフトウェア | 名称: PHENIX / バージョン: 1.11.1_2575: / 分類: 精密化 | ||||||||||||||||||||||||
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CTF補正 | タイプ: NONE | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.95 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 241288 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
精密化 | 最高解像度: 3.95 Å | ||||||||||||||||||||||||
拘束条件 |
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