- PDB-6wh1: Structure of the complex of human DNA ligase III-alpha and XRCC1 ... -
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基本情報
登録情報
データベース: PDB / ID: 6wh1
タイトル
Structure of the complex of human DNA ligase III-alpha and XRCC1 BRCT domains
要素
DNA ligase 3 alpha
X-ray repair cross complementing protein 1 variant
キーワード
DNA BINDING PROTEIN/LIGASE / DNA ligase complex / DNA repair / DNA BINDING PROTEIN / DNA BINDING PROTEIN-LIGASE complex
機能・相同性
機能・相同性情報
DNA ligase III-XRCC1 complex / negative regulation of mitochondrial DNA replication / 3' overhang single-stranded DNA endodeoxyribonuclease activity / oxidized DNA binding / positive regulation of DNA ligase activity / telomeric DNA-containing double minutes formation / ERCC4-ERCC1 complex / negative regulation of protection from non-homologous end joining at telomere / ADP-D-ribose modification-dependent protein binding / negative regulation of protein ADP-ribosylation ...DNA ligase III-XRCC1 complex / negative regulation of mitochondrial DNA replication / 3' overhang single-stranded DNA endodeoxyribonuclease activity / oxidized DNA binding / positive regulation of DNA ligase activity / telomeric DNA-containing double minutes formation / ERCC4-ERCC1 complex / negative regulation of protection from non-homologous end joining at telomere / ADP-D-ribose modification-dependent protein binding / negative regulation of protein ADP-ribosylation / base-excision repair, DNA ligation / DNA ligase activity / poly-ADP-D-ribose binding / DNA ligase (ATP) / positive regulation of single strand break repair / DNA ligase (ATP) activity / voluntary musculoskeletal movement / cerebellum morphogenesis / single strand break repair / replication-born double-strand break repair via sister chromatid exchange / DNA ligation / HDR through MMEJ (alt-NHEJ) / lagging strand elongation / response to hydroperoxide / mitochondrial DNA repair / Resolution of AP sites via the single-nucleotide replacement pathway / DNA biosynthetic process / double-strand break repair via alternative nonhomologous end joining / APEX1-Independent Resolution of AP Sites via the Single Nucleotide Replacement Pathway / site of DNA damage / mitochondrion organization / Gap-filling DNA repair synthesis and ligation in GG-NER / base-excision repair, gap-filling / : / hippocampus development / double-strand break repair via homologous recombination / base-excision repair / double-strand break repair via nonhomologous end joining / Gap-filling DNA repair synthesis and ligation in TC-NER / double-strand break repair / chromosome, telomeric region / damaged DNA binding / response to hypoxia / response to xenobiotic stimulus / cell cycle / cell division / chromatin / nucleolus / enzyme binding / mitochondrion / DNA binding / zinc ion binding / nucleoplasm / ATP binding / nucleus 類似検索 - 分子機能
DNA ligase 3, BRCT domain / DNA ligase 3 BRCT domain / DNA-repair protein Xrcc1, N-terminal / XRCC1, first (central) BRCT domain / XRCC1 N terminal domain / DNA ligase, ATP-dependent / DNA ligase, ATP-dependent, N-terminal / DNA ligase, ATP-dependent, N-terminal domain superfamily / DNA ligase N terminus / ATP-dependent DNA ligase signature 2. ...DNA ligase 3, BRCT domain / DNA ligase 3 BRCT domain / DNA-repair protein Xrcc1, N-terminal / XRCC1, first (central) BRCT domain / XRCC1 N terminal domain / DNA ligase, ATP-dependent / DNA ligase, ATP-dependent, N-terminal / DNA ligase, ATP-dependent, N-terminal domain superfamily / DNA ligase N terminus / ATP-dependent DNA ligase signature 2. / ATP-dependent DNA ligase AMP-binding site. / DNA ligase, ATP-dependent, C-terminal / ATP dependent DNA ligase C terminal region / DNA ligase, ATP-dependent, conserved site / ATP-dependent DNA ligase family profile. / Zinc finger poly(ADP-ribose) polymerase (PARP)-type signature. / Zinc finger, PARP-type superfamily / Poly(ADP-ribose) polymerase and DNA-Ligase Zn-finger region / Zinc finger poly(ADP-ribose) polymerase (PARP)-type profile. / Poly(ADP-ribose) polymerase and DNA-Ligase Zn-finger region / DNA ligase, ATP-dependent, central / ATP dependent DNA ligase domain / Zinc finger, PARP-type / BRCT domain, a BRCA1 C-terminus domain / BRCA1 C Terminus (BRCT) domain / breast cancer carboxy-terminal domain / BRCT domain profile. / BRCT domain / BRCT domain superfamily / Galactose-binding-like domain superfamily / Nucleic acid-binding, OB-fold 類似検索 - ドメイン・相同性
DNA repair protein XRCC1 / DNA ligase 3 / X-ray repair cross complementing protein 1 variant 類似検索 - 構成要素
ジャーナル: Nucleic Acids Res / 年: 2021 タイトル: An atypical BRCT-BRCT interaction with the XRCC1 scaffold protein compacts human DNA Ligase IIIα within a flexible DNA repair complex. 著者: Michal Hammel / Ishtiaque Rashid / Aleksandr Sverzhinsky / Yasin Pourfarjam / Miaw-Sheue Tsai / Tom Ellenberger / John M Pascal / In-Kwon Kim / John A Tainer / Alan E Tomkinson / 要旨: The XRCC1-DNA ligase IIIα complex (XL) is critical for DNA single-strand break repair, a key target for PARP inhibitors in cancer cells deficient in homologous recombination. Here, we combined ...The XRCC1-DNA ligase IIIα complex (XL) is critical for DNA single-strand break repair, a key target for PARP inhibitors in cancer cells deficient in homologous recombination. Here, we combined biophysical approaches to gain insights into the shape and conformational flexibility of the XL as well as XRCC1 and DNA ligase IIIα (LigIIIα) alone. Structurally-guided mutational analyses based on the crystal structure of the human BRCT-BRCT heterodimer identified the network of salt bridges that together with the N-terminal extension of the XRCC1 C-terminal BRCT domain constitute the XL molecular interface. Coupling size exclusion chromatography with small angle X-ray scattering and multiangle light scattering (SEC-SAXS-MALS), we determined that the XL is more compact than either XRCC1 or LigIIIα, both of which form transient homodimers and are highly disordered. The reduced disorder and flexibility allowed us to build models of XL particles visualized by negative stain electron microscopy that predict close spatial organization between the LigIIIα catalytic core and both BRCT domains of XRCC1. Together our results identify an atypical BRCT-BRCT interaction as the stable nucleating core of the XL that links the flexible nick sensing and catalytic domains of LigIIIα to other protein partners of the flexible XRCC1 scaffold.
温度: 295 K / 手法: 蒸気拡散法, ハンギングドロップ法 / pH: 5.5 / 詳細: 8-10% isopropanol and 0.1M Bis-Tris pH 5.5
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データ収集
回折
平均測定温度: 100 K / Serial crystal experiment: N
放射光源
由来: シンクロトロン / サイト: ALS / ビームライン: 12.3.1 / 波長: 1.12712 Å
検出器
タイプ: MAR CCD 130 mm / 検出器: CCD / 日付: 2012年4月9日
放射
プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray
放射波長
波長: 1.12712 Å / 相対比: 1
反射
解像度: 2.4→37.483 Å / Num. obs: 6860 / % possible obs: 98.4 % / 冗長度: 5 % / Rsym value: 0.041 / Net I/σ(I): 29.9
反射 シェル
解像度: 2.4→2.46 Å / Num. unique obs: 376 / Rsym value: 0.477 / % possible all: 97.8
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解析
ソフトウェア
名称
バージョン
分類
PHENIX
1.17.1
精密化
HKL-2000
データ削減
HKL-2000
データスケーリング
SOLVE
位相決定
精密化
構造決定の手法: 多波長異常分散 / 解像度: 2.4→37.48 Å / Cor.coef. Fo:Fc: 0.94 / Cor.coef. Fo:Fc free: 0.916 / SU B: 23.399 / SU ML: 0.249 / 交差検証法: FREE R-VALUE / ESU R: 0.597 / ESU R Free: 0.308 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS U VALUES : RESIDUAL ONLY