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基本情報
登録情報 | データベース: PDB / ID: 8tqc | |||||||||||||||||||||||||||||||||||||||||||||
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タイトル | Structure of the human CDK8 kinase module | |||||||||||||||||||||||||||||||||||||||||||||
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![]() | TRANSCRIPTION / Mediator / CDK8 / MED12 / MED13 / CKM. | |||||||||||||||||||||||||||||||||||||||||||||
機能・相同性 | ![]() axis elongation involved in somitogenesis / CKM complex / embryonic neurocranium morphogenesis / G0 to G1 transition / oligodendrocyte development / post-anal tail morphogenesis / endoderm development / embryonic brain development / mediator complex / RNA polymerase II CTD heptapeptide repeat Y1 kinase activity ...axis elongation involved in somitogenesis / CKM complex / embryonic neurocranium morphogenesis / G0 to G1 transition / oligodendrocyte development / post-anal tail morphogenesis / endoderm development / embryonic brain development / mediator complex / RNA polymerase II CTD heptapeptide repeat Y1 kinase activity / RNA polymerase II CTD heptapeptide repeat S2 kinase activity / RNA polymerase II CTD heptapeptide repeat T4 kinase activity / RNA polymerase II CTD heptapeptide repeat S5 kinase activity / RNA polymerase II CTD heptapeptide repeat S7 kinase activity / Generic Transcription Pathway / triglyceride homeostasis / nuclear vitamin D receptor binding / [RNA-polymerase]-subunit kinase / nuclear thyroid hormone receptor binding / Wnt signaling pathway, planar cell polarity pathway / cyclin-dependent protein serine/threonine kinase regulator activity / spinal cord development / RSV-host interactions / somatic stem cell population maintenance / negative regulation of Notch signaling pathway / positive regulation of transcription initiation by RNA polymerase II / ubiquitin ligase complex / cyclin-dependent kinase / cyclin-dependent protein serine/threonine kinase activity / Schwann cell development / cyclin-dependent protein kinase holoenzyme complex / cholesterol homeostasis / transcription coregulator activity / neural tube closure / SMAD2/SMAD3:SMAD4 heterotrimer regulates transcription / PPARA activates gene expression / beta-catenin binding / Transcriptional regulation of white adipocyte differentiation / NOTCH1 Intracellular Domain Regulates Transcription / Constitutive Signaling by NOTCH1 PEST Domain Mutants / Constitutive Signaling by NOTCH1 HD+PEST Domain Mutants / ubiquitin protein ligase activity / heart development / MLL4 and MLL3 complexes regulate expression of PPARG target genes in adipogenesis and hepatic steatosis / transcription coactivator activity / protein kinase activity / protein ubiquitination / RNA polymerase II cis-regulatory region sequence-specific DNA binding / protein serine kinase activity / protein serine/threonine kinase activity / chromatin binding / positive regulation of DNA-templated transcription / nucleolus / positive regulation of transcription by RNA polymerase II / protein-containing complex / nucleoplasm / ATP binding / identical protein binding / nucleus / membrane 類似検索 - 分子機能 | |||||||||||||||||||||||||||||||||||||||||||||
生物種 | ![]() | |||||||||||||||||||||||||||||||||||||||||||||
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: 3.8 Å | |||||||||||||||||||||||||||||||||||||||||||||
![]() | Chen, S.F. / Chao, T.C. / Kim, H.J. / Tang, H.C. / Khadka, S. / Li, T. / Murakami, K. / Boyer, T.G. / Tsai, K.L. | |||||||||||||||||||||||||||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural basis of the human transcriptional Mediator regulated by its dissociable kinase module. 著者: Ti-Chun Chao / Shin-Fu Chen / Hee Jong Kim / Hui-Chi Tang / Hsiang-Ching Tseng / An Xu / Leon Palao / Subash Khadka / Tao Li / Mo-Fan Huang / Dung-Fang Lee / Kenji Murakami / Thomas G Boyer / Kuang-Lei Tsai / ![]() 要旨: The eukaryotic transcriptional Mediator comprises a large core (cMED) and a dissociable CDK8 kinase module (CKM). cMED recruits RNA polymerase II (RNA Pol II) and promotes pre-initiation complex ...The eukaryotic transcriptional Mediator comprises a large core (cMED) and a dissociable CDK8 kinase module (CKM). cMED recruits RNA polymerase II (RNA Pol II) and promotes pre-initiation complex formation in a manner repressed by the CKM through mechanisms presently unknown. Herein, we report cryoelectron microscopy structures of the complete human Mediator and its CKM. The CKM binds to multiple regions on cMED through both MED12 and MED13, including a large intrinsically disordered region (IDR) in the latter. MED12 and MED13 together anchor the CKM to the cMED hook, positioning CDK8 downstream and proximal to the transcription start site. Notably, the MED13 IDR obstructs the recruitment of RNA Pol II/MED26 onto cMED by direct occlusion of their respective binding sites, leading to functional repression of cMED-dependent transcription. Combined with biochemical and functional analyses, these structures provide a conserved mechanistic framework to explain the basis for CKM-mediated repression of cMED function. | |||||||||||||||||||||||||||||||||||||||||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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PDBx/mmCIF形式 | ![]() | 607.4 KB | 表示 | ![]() |
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PDB形式 | ![]() | 462.1 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
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リンク
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集合体
登録構造単位 | ![]()
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要素
#1: タンパク質 | 分子量: 243354.891 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() 参照: UniProt: Q93074 | ||||
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#2: タンパク質 | 分子量: 239535.906 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() 参照: UniProt: Q9UHV7 | ||||
#3: タンパク質 | 分子量: 53368.668 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() 参照: UniProt: P49336 | ||||
#4: タンパク質 | 分子量: 33279.691 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() 参照: UniProt: P24863 | ||||
#5: 化合物 | 研究の焦点であるリガンドがあるか | Y | Has protein modification | Y | |
-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 |
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試料調製
構成要素 | 名称: human CDK8 kinase module / タイプ: COMPLEX / Entity ID: #1-#4 / 由来: RECOMBINANT |
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由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() |
緩衝液 | pH: 7.9 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 装置: FEI VITROBOT MARK III / 凍結剤: ETHANE / 湿度: 100 % |
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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: TFS KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 3000 nm / 最小 デフォーカス(公称値): 600 nm |
撮影 | 電子線照射量: 64 e/Å2 フィルム・検出器のモデル: GATAN K2 QUANTUM (4k x 4k) |
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解析
EMソフトウェア | 名称: PHENIX / カテゴリ: モデル精密化 |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
3次元再構成 | 解像度: 3.8 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 122015 / 対称性のタイプ: POINT |