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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 | CryoEM structure of bacterial transcription intermediate complex mediated by activator PspF containing nifH promoter DNA containing mismatch from -11 to -8 - conformation 3 | |||||||||
マップデータ | ||||||||||
試料 |
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キーワード | sigma factor / transcription / complex / AAA+ / DNA-binding protein | |||||||||
| 機能・相同性 | 機能・相同性情報regulation of cellular response to stress / DNA-binding transcription activator activity / RNA polymerase complex / submerged biofilm formation / cellular response to cell envelope stress / phosphorelay signal transduction system / regulation of DNA-templated transcription initiation / sigma factor activity / bacterial-type flagellum assembly / bacterial-type RNA polymerase core enzyme binding ...regulation of cellular response to stress / DNA-binding transcription activator activity / RNA polymerase complex / submerged biofilm formation / cellular response to cell envelope stress / phosphorelay signal transduction system / regulation of DNA-templated transcription initiation / sigma factor activity / bacterial-type flagellum assembly / bacterial-type RNA polymerase core enzyme binding / cytosolic DNA-directed RNA polymerase complex / bacterial-type flagellum-dependent cell motility / nitrate assimilation / cis-regulatory region sequence-specific DNA binding / nucleotidyltransferase activity / DNA-directed RNA polymerase complex / regulation of DNA-templated transcription elongation / transcription elongation factor complex / transcription antitermination / cell motility / DNA-templated transcription initiation / protein-DNA complex / ribonucleoside binding / DNA-directed RNA polymerase / DNA-directed RNA polymerase activity / response to heat / protein-containing complex assembly / transcription regulator complex / sequence-specific DNA binding / intracellular iron ion homeostasis / protein dimerization activity / response to antibiotic / negative regulation of DNA-templated transcription / regulation of DNA-templated transcription / positive regulation of DNA-templated transcription / magnesium ion binding / ATP hydrolysis activity / DNA binding / zinc ion binding / ATP binding / identical protein binding / membrane / cytoplasm / cytosol 類似検索 - 分子機能 | |||||||||
| 生物種 | ![]() Klebsiella pneumoniae (肺炎桿菌) | |||||||||
| 手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 5.8 Å | |||||||||
データ登録者 | Gao F / Zhang X | |||||||||
| 資金援助 | 英国, 1件
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引用 | ジャーナル: Proc Natl Acad Sci U S A / 年: 2025タイトル: Subunit specialization in AAA+ proteins and substrate unfolding during transcription complex remodeling. 著者: Forson Gao / Fuzhou Ye / Martin Buck / Xiaodong Zhang / ![]() 要旨: Bacterial RNA polymerase (RNAP) is a multisubunit enzyme that copies DNA into RNA in a process known as transcription. Bacteria use σ factors to recruit RNAP to promoter regions of genes that need ...Bacterial RNA polymerase (RNAP) is a multisubunit enzyme that copies DNA into RNA in a process known as transcription. Bacteria use σ factors to recruit RNAP to promoter regions of genes that need to be transcribed, with 60% bacteria containing at least one specialized σ factor, σ. σ recruits RNAP to promoters of genes associated with stress responses and forms a stable closed complex that does not spontaneously isomerize to the open state where promoter DNA is melted out and competent for transcription. The σ-mediated open complex formation requires specific AAA+ proteins (TPases ssociated with diverse cellular ctivities) known as bacterial enhancer-binding proteins (bEBPs). We have now obtained structures of new intermediate states of bEBP-bound complexes during transcription initiation, which elucidate the mechanism of DNA melting driven by ATPase activity of bEBPs and suggest a mechanistic model that couples the Adenosine triphosphate (ATP) hydrolysis cycle within the bEBP hexamer with σ unfolding. Our data reveal that bEBP forms a nonplanar hexamer with the hydrolysis-ready subunit located at the furthest/highest point of the spiral hexamer relative to the RNAP. ATP hydrolysis induces conformational changes in bEBP that drives a vectoral transiting of the regulatory N terminus of σ into the bEBP hexamer central pore causing the partial unfolding of σ, while forming specific bEBP contacts with promoter DNA. Furthermore, our data suggest a mechanism of the bEBP AAA+ protein that is distinct from the hand-over-hand mechanism proposed for many other AAA+ proteins, highlighting the versatile mechanisms utilized by the large protein family. | |||||||||
| 履歴 |
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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_52917.map.gz | 49.4 MB | EMDBマップデータ形式 | |
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| ヘッダ (付随情報) | emd-52917-v30.xml emd-52917.xml | 24.9 KB 24.9 KB | 表示 表示 | EMDBヘッダ |
| 画像 | emd_52917.png | 93.3 KB | ||
| Filedesc metadata | emd-52917.cif.gz | 9.6 KB | ||
| アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-52917 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-52917 | HTTPS FTP |
-検証レポート
| 文書・要旨 | emd_52917_validation.pdf.gz | 438.4 KB | 表示 | EMDB検証レポート |
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| 文書・詳細版 | emd_52917_full_validation.pdf.gz | 438 KB | 表示 | |
| XML形式データ | emd_52917_validation.xml.gz | 6.4 KB | 表示 | |
| CIF形式データ | emd_52917_validation.cif.gz | 7.4 KB | 表示 | |
| アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-52917 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-52917 | HTTPS FTP |
-関連構造データ
| 関連構造データ | ![]() 9q94MC ![]() 9q91C ![]() 9q92C ![]() 9q93C ![]() 9q95C ![]() 9q96C ![]() 9q97C ![]() 9q98C C: 同じ文献を引用 ( M: このマップから作成された原子モデル |
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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_52917.map.gz / 形式: CCP4 / 大きさ: 85.5 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| 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: 1.1 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
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試料の構成要素
+全体 : Subtracted refinement map of conformation 1 of PspF(1-275)-sigma5...
+超分子 #1: Subtracted refinement map of conformation 1 of PspF(1-275)-sigma5...
+分子 #1: Psp operon transcriptional activator
+分子 #4: RNA polymerase sigma-54 factor
+分子 #5: DNA-directed RNA polymerase subunit alpha
+分子 #6: DNA-directed RNA polymerase subunit beta
+分子 #7: DNA-directed RNA polymerase subunit beta'
+分子 #8: DNA-directed RNA polymerase subunit omega
+分子 #2: DNA (34-MER)
+分子 #3: DNA (34-MER)
+分子 #9: ADENOSINE-5'-DIPHOSPHATE
+分子 #10: ALUMINUM FLUORIDE
+分子 #11: MAGNESIUM ION
-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 |
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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 BIOQUANTUM (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: BRIGHT FIELD / 最大 デフォーカス(公称値): 3.0 µm / 最小 デフォーカス(公称値): 1.0 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
データ登録者
英国, 1件
引用













































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

