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データを開く
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基本情報
| 登録情報 | ![]() | |||||||||
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| タイトル | Human RNA Polymerase III de novo transcribing complex 5 (TC5) | |||||||||
マップデータ | Pol III TC5 main map | |||||||||
試料 |
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キーワード | initiation transcribing complex / TRANSCRIPTION/DNA/RNA / TRANSCRIPTION-DNA-RNA complex | |||||||||
| 機能・相同性 | 機能・相同性情報snRNA-activating protein complex / snRNA transcription / transcription preinitiation complex assembly / snRNA transcription by RNA polymerase III / bent DNA binding / RNA polymerase III preinitiation complex assembly / RNA Polymerase III Chain Elongation / transcription factor TFIIIB complex / DNA/RNA hybrid binding / calcitonin gene-related peptide receptor activity ...snRNA-activating protein complex / snRNA transcription / transcription preinitiation complex assembly / snRNA transcription by RNA polymerase III / bent DNA binding / RNA polymerase III preinitiation complex assembly / RNA Polymerase III Chain Elongation / transcription factor TFIIIB complex / DNA/RNA hybrid binding / calcitonin gene-related peptide receptor activity / TFIIIC-class transcription factor complex binding / RNA Polymerase III Transcription Termination / RNA polymerase transcription factor SL1 complex / RNA polymerase III type 3 promoter sequence-specific DNA binding / regulation of transcription by RNA polymerase III / snRNA transcription by RNA polymerase II / RNA polymerase III general transcription initiation factor activity / regulation of transcription by RNA polymerase I / RNA polymerase I core promoter sequence-specific DNA binding / DNA polymerase III complex / RPAP3/R2TP/prefoldin-like complex / nuclear DNA-directed RNA polymerase complex / female germ cell nucleus / RNA Polymerase III Transcription Initiation From Type 1 Promoter / RNA Polymerase III Transcription Initiation From Type 2 Promoter / RNA Polymerase III Transcription Initiation From Type 3 Promoter / transcription factor TFIIA complex / RNA Polymerase III Abortive And Retractive Initiation / Cytosolic sensors of pathogen-associated DNA / male pronucleus / female pronucleus / RNA polymerase II general transcription initiation factor binding / positive regulation of innate immune response / nucleobase-containing compound metabolic process / Abortive elongation of HIV-1 transcript in the absence of Tat / FGFR2 alternative splicing / transcription preinitiation complex / RNA Polymerase I Transcription Termination / Viral Messenger RNA Synthesis / MicroRNA (miRNA) biogenesis / Signaling by FGFR2 IIIa TM / transcription factor TFIID complex / RNA polymerase II general transcription initiation factor activity / RNA Pol II CTD phosphorylation and interaction with CE during HIV infection / RNA Pol II CTD phosphorylation and interaction with CE / Formation of the Early Elongation Complex / Formation of the HIV-1 Early Elongation Complex / mRNA Capping / transcription initiation at RNA polymerase III promoter / HIV Transcription Initiation / RNA Polymerase II HIV Promoter Escape / Transcription of the HIV genome / RNA Polymerase II Promoter Escape / RNA Polymerase II Transcription Pre-Initiation And Promoter Opening / RNA Polymerase II Transcription Initiation / RNA Polymerase II Transcription Initiation And Promoter Clearance / PIWI-interacting RNA (piRNA) biogenesis / mRNA Splicing - Minor Pathway / aryl hydrocarbon receptor binding / TFIIB-class transcription factor binding / RNA Polymerase I Transcription Initiation / Processing of Capped Intron-Containing Pre-mRNA / transcription by RNA polymerase III / RNA polymerase II transcribes snRNA genes / Pausing and recovery of Tat-mediated HIV elongation / Tat-mediated HIV elongation arrest and recovery / HIV elongation arrest and recovery / Pausing and recovery of HIV elongation / positive regulation of transcription initiation by RNA polymerase II / Tat-mediated elongation of the HIV-1 transcript / RNA polymerase II core promoter sequence-specific DNA binding / Formation of HIV-1 elongation complex containing HIV-1 Tat / core promoter sequence-specific DNA binding / RNA polymerase I complex / RNA polymerase III complex / transcription elongation by RNA polymerase I / RNA polymerase II preinitiation complex assembly / Formation of HIV elongation complex in the absence of HIV Tat / RNA polymerase II, core complex / tRNA transcription by RNA polymerase III / transcription by RNA polymerase I / RNA Polymerase II Transcription Elongation / Formation of RNA Pol II elongation complex / RNA Polymerase II Pre-transcription Events / mRNA Splicing - Major Pathway / positive regulation of interferon-beta production / TBP-class protein binding / Inhibition of DNA recombination at telomere / acrosomal vesicle / SIRT1 negatively regulates rRNA expression / male germ cell nucleus / TP53 Regulates Transcription of DNA Repair Genes / transcription initiation at RNA polymerase II promoter / DNA-templated transcription initiation / neuropeptide signaling pathway / RNA Polymerase I Promoter Escape / Transcriptional regulation by small RNAs / euchromatin / protein-DNA complex / NoRC negatively regulates rRNA expression 類似検索 - 分子機能 | |||||||||
| 生物種 | Homo sapiens (ヒト) | |||||||||
| 手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.0 Å | |||||||||
データ登録者 | Wang Q / Ren Y / Jin Q / Chen X / Xu Y | |||||||||
| 資金援助 | 1件
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引用 | ジャーナル: Nature / 年: 2025タイトル: Structural insights into human Pol III transcription initiation in action. 著者: Qianmin Wang / Yulei Ren / Qianwei Jin / Xizi Chen / Yanhui Xu / ![]() 要旨: RNA polymerase III (Pol III) transcribes highly demanded RNAs grouped into three types of classical promoters, including type 1 (5S rRNA), type 2 (tRNA) and type 3 (short non-coding RNAs, such as U6, ...RNA polymerase III (Pol III) transcribes highly demanded RNAs grouped into three types of classical promoters, including type 1 (5S rRNA), type 2 (tRNA) and type 3 (short non-coding RNAs, such as U6, 7SK and RNase H1) promoters. While structures of the Pol III preinitiation complex (PIC) and elongation complex (EC) have been determined, the mechanism underlying the transition from initiation to elongation remains unclear. Here we reconstituted seven human Pol III transcribing complexes (TC4, TC5, TC6, TC8, TC10, TC12 and TC13) halted on U6 promoters with nascent RNAs of 4-13 nucleotides. Cryo-electron microscopy structures captured initially transcribing complexes (ITCs; TC4 and TC5) and ECs (TC6-13). Together with KMnO footprinting, the data reveal extensive modular rearrangements: the transcription bubble expands from PIC to TC5, followed by general transcription factor (GTF) dissociation and abrupt bubble collapse from TC5 to TC6, marking the ITC-EC transition. In TC5, SNAPc and TFIIIB remain bound to the promoter and Pol III, while the RNA-DNA hybrid adopts a tilted conformation with template DNA blocked by BRF2, a TFIIIB subunit. Hybrid forward translocation during ITC-EC transition triggers BRF2-finger retraction, GTF release and transcription-bubble collapse. Pol III then escapes the promoter while GTFs stay bound upstream, potentially enabling reinitiation. These findings reveal molecular insights into Pol III dynamics and reinitiation mechanisms on type 3 promoters of highly demanded small RNAs, with the earliest documented initiation-elongation transition for an RNA polymerase. | |||||||||
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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 | emd_62029.map.gz | 4.1 MB | EMDBマップデータ形式 | |
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| ヘッダ (付随情報) | emd-62029-v30.xml emd-62029.xml | 59.8 KB 59.8 KB | 表示 表示 | EMDBヘッダ |
| 画像 | emd_62029.png | 128.2 KB | ||
| Filedesc metadata | emd-62029.cif.gz | 15.5 KB | ||
| その他 | emd_62029_additional_1.map.gz emd_62029_half_map_1.map.gz emd_62029_half_map_2.map.gz | 6.4 MB 118.2 MB 118.2 MB | ||
| アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-62029 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-62029 | HTTPS FTP |
-関連構造データ
| 関連構造データ | ![]() 9k3uMC ![]() 9k2gC ![]() 9k36C ![]() 9k38C ![]() 9k39C ![]() 9k3bC ![]() 9k3vC ![]() 9lktC ![]() 9lxnC ![]() 9lxoC 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 F&H 検索 |
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リンク
| EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
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| 「今月の分子」の関連する項目 |
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マップ
| ファイル | ダウンロード / ファイル: emd_62029.map.gz / 形式: CCP4 / 大きさ: 127.4 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| 注釈 | Pol III TC5 main map | ||||||||||||||||||||||||||||||||||||
| 投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||
| ボクセルのサイズ | X=Y=Z: 1.33254 Å | ||||||||||||||||||||||||||||||||||||
| 密度 |
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| 対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||
| 詳細 | EMDB XML:
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-添付データ
-追加マップ: Pol III TC5 SNAPC-TFIIIB local map
| ファイル | emd_62029_additional_1.map | ||||||||||||
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| 注釈 | Pol III TC5 SNAPC-TFIIIB local map | ||||||||||||
| 投影像・断面図 |
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| 密度ヒストグラム |
-ハーフマップ: Pol III TC5 half map2
| ファイル | emd_62029_half_map_1.map | ||||||||||||
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| 注釈 | Pol III TC5 half map2 | ||||||||||||
| 投影像・断面図 |
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| 密度ヒストグラム |
-ハーフマップ: Pol III TC5 half map1
| ファイル | emd_62029_half_map_2.map | ||||||||||||
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| 注釈 | Pol III TC5 half map1 | ||||||||||||
| 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 : RNA polymerase III transcribing complex 5
+超分子 #1: RNA polymerase III transcribing complex 5
+分子 #1: snRNA-activating protein complex subunit 1
+分子 #2: snRNA-activating protein complex subunit 3
+分子 #3: snRNA-activating protein complex subunit 4
+分子 #4: DNA-directed RNA polymerase III subunit RPC1
+分子 #5: DNA-directed RNA polymerase III subunit RPC2
+分子 #6: DNA-directed RNA polymerases I and III subunit RPAC1
+分子 #7: DNA-directed RNA polymerase III subunit RPC9
+分子 #8: DNA-directed RNA polymerases I, II, and III subunit RPABC1
+分子 #9: DNA-directed RNA polymerases I, II, and III subunit RPABC2
+分子 #10: DNA-directed RNA polymerase III subunit RPC8
+分子 #11: DNA-directed RNA polymerases I, II, and III subunit RPABC3
+分子 #12: DNA-directed RNA polymerase III subunit RPC10
+分子 #13: DNA-directed RNA polymerases I, II, and III subunit RPABC5
+分子 #14: DNA-directed RNA polymerases I and III subunit RPAC2
+分子 #15: DNA-directed RNA polymerases I, II, and III subunit RPABC4
+分子 #16: DNA-directed RNA polymerase III subunit RPC5
+分子 #17: DNA-directed RNA polymerase III subunit RPC4
+分子 #18: DNA-directed RNA polymerase III subunit RPC3
+分子 #19: DNA-directed RNA polymerase III subunit RPC6
+分子 #20: DNA-directed RNA polymerase III subunit RPC7
+分子 #21: TATA-box-binding protein
+分子 #22: Transcription factor IIIB 50 kDa subunit
+分子 #23: Transcription factor TFIIIB component B'' homolog
+分子 #24: DNA (97-MER)
+分子 #25: DNA (97-MER)
+分子 #26: RNA (5'-R(P*UP*GP*CP*U)-3')
+分子 #27: ZINC ION
+分子 #28: MAGNESIUM ION
+分子 #29: IRON/SULFUR CLUSTER
+分子 #30: GUANOSINE-5'-TRIPHOSPHATE
-実験情報
-構造解析
| 手法 | クライオ電子顕微鏡法 |
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解析 | 単粒子再構成法 |
| 試料の集合状態 | particle |
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試料調製
| 緩衝液 | pH: 8 |
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| 凍結 | 凍結剤: ETHANE-PROPANE |
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電子顕微鏡法
| 顕微鏡 | TFS KRIOS |
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| 撮影 | フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 平均電子線量: 50.0 e/Å2 |
| 電子線 | 加速電圧: 300 kV / 電子線源: FIELD EMISSION GUN |
| 電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: DARK FIELD / 最大 デフォーカス(公称値): 2.5 µm / 最小 デフォーカス(公称値): 1.5 µm |
| 実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
ムービー
コントローラー
万見について




キーワード
Homo sapiens (ヒト)
データ登録者
引用










































Z (Sec.)
Y (Row.)
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解析
FIELD EMISSION GUN

