RNA polymerase II subunit D / DNA-directed RNA polymerase II subunit RPB11-a / DNA-directed RNA polymerases I, II, and III subunit RPABC3 / DNA-directed RNA polymerases I, II, and III subunit RPABC5 / DNA-directed RNA polymerases I, II, and III subunit RPABC2 / DNA-directed RNA polymerase II subunit RPB3 / DNA-directed RNA polymerase subunit beta / DNA-directed RNA polymerase II subunit RPB7 / RNA polymerase II, I and III subunit K / DNA-directed RNA polymerase II subunit E ...RNA polymerase II subunit D / DNA-directed RNA polymerase II subunit RPB11-a / DNA-directed RNA polymerases I, II, and III subunit RPABC3 / DNA-directed RNA polymerases I, II, and III subunit RPABC5 / DNA-directed RNA polymerases I, II, and III subunit RPABC2 / DNA-directed RNA polymerase II subunit RPB3 / DNA-directed RNA polymerase subunit beta / DNA-directed RNA polymerase II subunit RPB7 / RNA polymerase II, I and III subunit K / DNA-directed RNA polymerase II subunit E / DNA-directed RNA polymerase II subunit RPB1 / DNA-directed RNA polymerase II subunit RPB9 / DNA excision repair protein ERCC-6 / DNA excision repair protein ERCC-8 / DNA damage-binding protein 1 / UV-stimulated scaffold protein A / Parafibromin / RNA polymerase-associated protein CTR9 homolog / Transcription elongation factor SPT6 / RNA polymerase II-associated factor 1 homolog / RNA polymerase-associated protein LEO1 / Superkiller complex protein 8 類似検索 - 構成要素
ジャーナル: Nature / 年: 2021 タイトル: Structural basis of human transcription-DNA repair coupling. 著者: Goran Kokic / Felix R Wagner / Aleksandar Chernev / Henning Urlaub / Patrick Cramer / 要旨: Transcription-coupled DNA repair removes bulky DNA lesions from the genome and protects cells against ultraviolet (UV) irradiation. Transcription-coupled DNA repair begins when RNA polymerase II ...Transcription-coupled DNA repair removes bulky DNA lesions from the genome and protects cells against ultraviolet (UV) irradiation. Transcription-coupled DNA repair begins when RNA polymerase II (Pol II) stalls at a DNA lesion and recruits the Cockayne syndrome protein CSB, the E3 ubiquitin ligase, CRL4 and UV-stimulated scaffold protein A (UVSSA). Here we provide five high-resolution structures of Pol II transcription complexes containing human transcription-coupled DNA repair factors and the elongation factors PAF1 complex (PAF) and SPT6. Together with biochemical and published data, the structures provide a model for transcription-repair coupling. Stalling of Pol II at a DNA lesion triggers replacement of the elongation factor DSIF by CSB, which binds to PAF and moves upstream DNA to SPT6. The resulting elongation complex, EC, uses the CSA-stimulated translocase activity of CSB to pull on upstream DNA and push Pol II forward. If the lesion cannot be bypassed, CRL4 spans over the Pol II clamp and ubiquitylates the RPB1 residue K1268, enabling recruitment of TFIIH to UVSSA and DNA repair. Conformational changes in CRL4 lead to ubiquitylation of CSB and to release of transcription-coupled DNA repair factors before transcription may continue over repaired DNA.
照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / 倍率(公称値): 81000
実験機器
モデル: Titan Krios / 画像提供: FEI Company
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画像解析
粒子像選択
選択した数: 1412038
初期モデル
モデルのタイプ: EMDB MAP
最終 再構成
解像度のタイプ: BY AUTHOR / 解像度: 2.9 Å / 解像度の算出法: FSC 0.143 CUT-OFF / ソフトウェア - 名称: RELION 詳細: Different number of particles was used for different focused refined maps. 使用した粒子像数: 100000