+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 8b8t | ||||||
---|---|---|---|---|---|---|---|
タイトル | Open conformation of the complex of DNA ligase I on PCNA and DNA in the presence of ATP | ||||||
要素 |
| ||||||
キーワード | REPLICATION / DNA / Complex / Ligase / PCNA / Ligation / Okazaki fragment maturation | ||||||
機能・相同性 | 機能・相同性情報 Okazaki fragment processing involved in mitotic DNA replication / Regulation of MITF-M-dependent genes involved in DNA damage repair and senescence / DNA ligase activity / DNA ligase (ATP) / positive regulation of deoxyribonuclease activity / dinucleotide insertion or deletion binding / PCNA-p21 complex / mitotic telomere maintenance via semi-conservative replication / DNA ligase (ATP) activity / purine-specific mismatch base pair DNA N-glycosylase activity ...Okazaki fragment processing involved in mitotic DNA replication / Regulation of MITF-M-dependent genes involved in DNA damage repair and senescence / DNA ligase activity / DNA ligase (ATP) / positive regulation of deoxyribonuclease activity / dinucleotide insertion or deletion binding / PCNA-p21 complex / mitotic telomere maintenance via semi-conservative replication / DNA ligase (ATP) activity / purine-specific mismatch base pair DNA N-glycosylase activity / MutLalpha complex binding / positive regulation of DNA-directed DNA polymerase activity / nuclear lamina / Polymerase switching / Telomere C-strand (Lagging Strand) Synthesis / Processive synthesis on the lagging strand / DNA ligation / PCNA complex / Removal of the Flap Intermediate / Processive synthesis on the C-strand of the telomere / Mismatch repair (MMR) directed by MSH2:MSH3 (MutSbeta) / Mismatch repair (MMR) directed by MSH2:MSH6 (MutSalpha) / Polymerase switching on the C-strand of the telomere / replisome / Transcription of E2F targets under negative control by DREAM complex / Removal of the Flap Intermediate from the C-strand / lagging strand elongation / response to L-glutamate / histone acetyltransferase binding / DNA biosynthetic process / DNA polymerase processivity factor activity / G1/S-Specific Transcription / leading strand elongation / response to dexamethasone / replication fork processing / Early Phase of HIV Life Cycle / nuclear replication fork / SUMOylation of DNA replication proteins / POLB-Dependent Long Patch Base Excision Repair / PCNA-Dependent Long Patch Base Excision Repair / anatomical structure morphogenesis / estrous cycle / mismatch repair / translesion synthesis / response to cadmium ion / DNA polymerase binding / cyclin-dependent protein kinase holoenzyme complex / epithelial cell differentiation / base-excision repair, gap-filling / positive regulation of DNA repair / Translesion synthesis by REV1 / Translesion synthesis by POLK / TP53 Regulates Transcription of Genes Involved in G2 Cell Cycle Arrest / Translesion synthesis by POLI / Gap-filling DNA repair synthesis and ligation in GG-NER / positive regulation of DNA replication / replication fork / male germ cell nucleus / liver regeneration / nuclear estrogen receptor binding / Recognition of DNA damage by PCNA-containing replication complex / Termination of translesion DNA synthesis / Translesion Synthesis by POLH / base-excision repair / HDR through Homologous Recombination (HRR) / Dual Incision in GG-NER / receptor tyrosine kinase binding / cellular response to hydrogen peroxide / Dual incision in TC-NER / Gap-filling DNA repair synthesis and ligation in TC-NER / cellular response to UV / cellular response to xenobiotic stimulus / E3 ubiquitin ligases ubiquitinate target proteins / response to estradiol / heart development / DNA recombination / damaged DNA binding / chromosome, telomeric region / nuclear body / cell division / intracellular membrane-bounded organelle / DNA repair / centrosome / chromatin binding / protein-containing complex binding / chromatin / negative regulation of transcription by RNA polymerase II / enzyme binding / mitochondrion / DNA binding / extracellular exosome / nucleoplasm / ATP binding / identical protein binding / nucleus / metal ion binding 類似検索 - 分子機能 | ||||||
生物種 | Homo sapiens (ヒト) | ||||||
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: 4.2 Å | ||||||
データ登録者 | Blair, K. / Tehseen, M. / Raducanu, V.S. / Shahid, T. / Lancey, C. / Cruehet, R. / Hamdan, S. / De Biasio, A. | ||||||
資金援助 | 英国, 1件
| ||||||
引用 | ジャーナル: Nat Commun / 年: 2022 タイトル: Mechanism of human Lig1 regulation by PCNA in Okazaki fragment sealing. 著者: Kerry Blair / Muhammad Tehseen / Vlad-Stefan Raducanu / Taha Shahid / Claudia Lancey / Fahad Rashid / Ramon Crehuet / Samir M Hamdan / Alfredo De Biasio / 要旨: During lagging strand synthesis, DNA Ligase 1 (Lig1) cooperates with the sliding clamp PCNA to seal the nicks between Okazaki fragments generated by Pol δ and Flap endonuclease 1 (FEN1). We present ...During lagging strand synthesis, DNA Ligase 1 (Lig1) cooperates with the sliding clamp PCNA to seal the nicks between Okazaki fragments generated by Pol δ and Flap endonuclease 1 (FEN1). We present several cryo-EM structures combined with functional assays, showing that human Lig1 recruits PCNA to nicked DNA using two PCNA-interacting motifs (PIPs) located at its disordered N-terminus (PIP) and DNA binding domain (PIP). Once Lig1 and PCNA assemble as two-stack rings encircling DNA, PIP is released from PCNA and only PIP is required for ligation to facilitate the substrate handoff from FEN1. Consistently, we observed that PCNA forms a defined complex with FEN1 and nicked DNA, and it recruits Lig1 to an unoccupied monomer creating a toolbelt that drives the transfer of DNA to Lig1. Collectively, our results provide a structural model on how PCNA regulates FEN1 and Lig1 during Okazaki fragments maturation. | ||||||
履歴 |
|
-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
---|
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 8b8t.cif.gz | 175 KB | 表示 | PDBx/mmCIF形式 |
---|---|---|---|---|
PDB形式 | pdb8b8t.ent.gz | 134.9 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 8b8t.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
その他 | その他のダウンロード |
-検証レポート
文書・要旨 | 8b8t_validation.pdf.gz | 1.1 MB | 表示 | wwPDB検証レポート |
---|---|---|---|---|
文書・詳細版 | 8b8t_full_validation.pdf.gz | 1.1 MB | 表示 | |
XML形式データ | 8b8t_validation.xml.gz | 36.9 KB | 表示 | |
CIF形式データ | 8b8t_validation.cif.gz | 57.5 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/b8/8b8t ftp://data.pdbj.org/pub/pdb/validation_reports/b8/8b8t | HTTPS FTP |
-関連構造データ
関連構造データ | 15921MC 7qnzC 7qo1C C: 同じ文献を引用 (文献) M: このデータのモデリングに利用したマップデータ |
---|---|
類似構造データ | 類似検索 - 機能・相同性F&H 検索 |
-リンク
-集合体
登録構造単位 |
|
---|---|
1 |
|
-要素
#1: タンパク質 | 分子量: 29720.342 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: LIG1 / 発現宿主: Escherichia coli BL21(DE3) (大腸菌) / 参照: UniProt: P18858, DNA ligase (ATP) |
---|---|
#2: タンパク質 | 分子量: 28441.504 Da / 分子数: 3 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PCNA / 発現宿主: Escherichia coli BL21(DE3) (大腸菌) / 参照: UniProt: P12004 |
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
---|---|
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 |
-試料調製
構成要素 | 名称: complex of DNA ligase I on PCNA and DNA in the presence of ATP タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT | ||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
由来(天然) | 生物種: Homo sapiens (ヒト) | ||||||||||||||||||||||||||||||
由来(組換発現) | 生物種: Escherichia coli BL21(DE3) (大腸菌) | ||||||||||||||||||||||||||||||
緩衝液 | pH: 7.5 | ||||||||||||||||||||||||||||||
緩衝液成分 |
| ||||||||||||||||||||||||||||||
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 IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 277 K |
-電子顕微鏡撮影
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |
---|---|
顕微鏡 | モデル: FEI TITAN KRIOS |
電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 105000 X / 最大 デフォーカス(公称値): 2500 nm / 最小 デフォーカス(公称値): 1000 nm / Cs: 2.7 mm / C2レンズ絞り径: 50 µm / アライメント法: ZEMLIN TABLEAU |
試料ホルダ | 凍結剤: NITROGEN 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER 最高温度: 77 K / 最低温度: 77 K |
撮影 | 平均露光時間: 2 sec. / 電子線照射量: 18 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 撮影したグリッド数: 1 |
電子光学装置 | エネルギーフィルター名称: GIF Bioquantum / エネルギーフィルタースリット幅: 20 eV |
画像スキャン | 横: 5760 / 縦: 4092 |
-解析
ソフトウェア | 名称: PHENIX / バージョン: 1.19.2_4158: / 分類: 精密化 | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
EMソフトウェア |
| ||||||||||||||||||||||||
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3次元再構成 | 解像度: 4.2 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 107550 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
原子モデル構築 | プロトコル: RIGID BODY FIT | ||||||||||||||||||||||||
拘束条件 |
|