+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 8umv | ||||||
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タイトル | Atomic model of the human CTF18-RFC-PCNA-DNA ternary complex with narrow PCNA opening state I (state 5) | ||||||
要素 |
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キーワード | REPLICATION/DNA / DNA clamp loader complex / REPLICATION-DNA complex | ||||||
機能・相同性 | 機能・相同性情報 positive regulation of deoxyribonuclease activity / dinucleotide insertion or deletion binding / response to organophosphorus / PCNA-p21 complex / mitotic telomere maintenance via semi-conservative replication / Elg1 RFC-like complex / Ctf18 RFC-like complex / DNA replication factor C complex / purine-specific mismatch base pair DNA N-glycosylase activity / MutLalpha complex binding ...positive regulation of deoxyribonuclease activity / dinucleotide insertion or deletion binding / response to organophosphorus / PCNA-p21 complex / mitotic telomere maintenance via semi-conservative replication / Elg1 RFC-like complex / Ctf18 RFC-like complex / DNA replication factor C complex / purine-specific mismatch base pair DNA N-glycosylase activity / MutLalpha complex binding / positive regulation of DNA-directed DNA polymerase activity / nuclear lamina / DNA clamp loader activity / Polymerase switching / Telomere C-strand (Lagging Strand) Synthesis / Processive synthesis on the lagging strand / PCNA complex / Removal of the Flap Intermediate / Processive synthesis on the C-strand of the telomere / Mismatch repair (MMR) directed by MSH2:MSH3 (MutSbeta) / Polymerase switching on the C-strand of the telomere / Mismatch repair (MMR) directed by MSH2:MSH6 (MutSalpha) / Removal of the Flap Intermediate from the C-strand / Transcription of E2F targets under negative control by DREAM complex / replisome / DNA strand elongation involved in DNA replication / DNA duplex unwinding / response to L-glutamate / HDR through Single Strand Annealing (SSA) / Impaired BRCA2 binding to RAD51 / histone acetyltransferase binding / DNA synthesis involved in DNA repair / leading strand elongation / DNA polymerase processivity factor activity / G1/S-Specific Transcription / response to dexamethasone / replication fork processing / nuclear replication fork / Presynaptic phase of homologous DNA pairing and strand exchange / SUMOylation of DNA replication proteins / PCNA-Dependent Long Patch Base Excision Repair / estrous cycle / mismatch repair / translesion synthesis / ATP-dependent activity, acting on DNA / Activation of ATR in response to replication stress / 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 / male germ cell nucleus / replication fork / nuclear estrogen receptor binding / liver regeneration / Recognition of DNA damage by PCNA-containing replication complex / Termination of translesion DNA synthesis / Translesion Synthesis by POLH / G2/M DNA damage checkpoint / HDR through Homologous Recombination (HRR) / Dual Incision in GG-NER / DNA-templated DNA replication / 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 / Processing of DNA double-strand break ends / Regulation of TP53 Activity through Phosphorylation / DNA replication / damaged DNA binding / chromosome, telomeric region / nuclear body / DNA repair / centrosome / chromatin binding / protein-containing complex binding / chromatin / negative regulation of transcription by RNA polymerase II / enzyme binding / ATP hydrolysis activity / DNA binding / extracellular exosome / nucleoplasm / ATP binding / identical protein binding / membrane / nucleus / cytosol 類似検索 - 分子機能 | ||||||
生物種 | Homo sapiens (ヒト) synthetic construct (人工物) | ||||||
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: 2.75 Å | ||||||
データ登録者 | Wang, F. / He, Q. / Li, H. | ||||||
資金援助 | 米国, 1件
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引用 | ジャーナル: Proc Natl Acad Sci U S A / 年: 2024 タイトル: Cryo-EM reveals a nearly complete PCNA loading process and unique features of the human alternative clamp loader CTF18-RFC. 著者: Qing He / Feng Wang / Michael E O'Donnell / Huilin Li / 要旨: The DNA sliding clamp PCNA is a multipurpose platform for DNA polymerases and many other proteins involved in DNA metabolism. The topologically closed PCNA ring needs to be cracked open and loaded ...The DNA sliding clamp PCNA is a multipurpose platform for DNA polymerases and many other proteins involved in DNA metabolism. The topologically closed PCNA ring needs to be cracked open and loaded onto DNA by a clamp loader, e.g., the well-studied pentameric ATPase complex RFC (RFC1-5). The CTF18-RFC complex is an alternative clamp loader found recently to bind the leading strand DNA polymerase ε and load PCNA onto leading strand DNA, but its structure and the loading mechanism have been unknown. By cryo-EM analysis of in vitro assembled human CTF18-RFC-DNA-PCNA complex, we have captured seven loading intermediates, revealing a detailed PCNA loading mechanism onto a 3'-ss/dsDNA junction by CTF18-RFC. Interestingly, the alternative loader has evolved a highly mobile CTF18 AAA+ module likely to lower the loading activity, perhaps to avoid competition with the RFC and to limit its role to leading strand clamp loading. To compensate for the lost stability due to the mobile AAA+ module, CTF18 has evolved a unique β-hairpin motif that reaches across RFC2 to interact with RFC5, thereby stabilizing the pentameric complex. Further, we found that CTF18 also contains a separation pin to locally melt DNA from the 3'-end of the primer; this ensures its ability to load PCNA to any 3'-ss/dsDNA junction, facilitated by the binding energy of the E-plug to the major groove. Our study reveals unique structural features of the human CTF18-RFC and contributes to a broader understanding of PCNA loading by the alternative clamp loaders. | ||||||
履歴 |
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-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
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-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 8umv.cif.gz | 564.7 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb8umv.ent.gz | 表示 | PDB形式 | |
PDBx/mmJSON形式 | 8umv.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 | 8umv_validation.pdf.gz | 1.6 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 8umv_full_validation.pdf.gz | 1.6 MB | 表示 | |
XML形式データ | 8umv_validation.xml.gz | 83 KB | 表示 | |
CIF形式データ | 8umv_validation.cif.gz | 124.3 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/um/8umv ftp://data.pdbj.org/pub/pdb/validation_reports/um/8umv | HTTPS FTP |
-関連構造データ
関連構造データ | 42385MC 8umtC 8umuC 8umwC 8umyC 8un0C 8unjC M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 (文献) |
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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 |
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1 |
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-要素
-タンパク質 , 2種, 4分子 AFGH
#1: タンパク質 | 分子量: 107523.984 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: CHTF18 発現宿主: Insect cell expression vector pTIE1 (その他) 参照: UniProt: Q8WVB6 |
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#6: タンパク質 | 分子量: 28795.752 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-Gold(DE3)pLysS AG' (大腸菌) 参照: UniProt: P12004 |
-Replication factor C subunit ... , 4種, 4分子 BCDE
#2: タンパク質 | 分子量: 39203.207 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: RFC2 発現宿主: Insect cell expression vector pTIE1 (その他) 参照: UniProt: P35250 |
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#3: タンパク質 | 分子量: 38545.512 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: RFC5 発現宿主: Insect cell expression vector pTIE1 (その他) 参照: UniProt: P40937 |
#4: タンパク質 | 分子量: 39735.711 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: RFC4 発現宿主: Insect cell expression vector pTIE1 (その他) 参照: UniProt: P35249 |
#5: タンパク質 | 分子量: 40614.332 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: RFC3 発現宿主: Insect cell expression vector pTIE1 (その他) 参照: UniProt: P40938 |
-DNA鎖 , 2種, 2分子 IJ
#7: DNA鎖 | 分子量: 12214.818 Da / 分子数: 1 / 由来タイプ: 合成 / 由来: (合成) synthetic construct (人工物) |
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#8: DNA鎖 | 分子量: 6136.008 Da / 分子数: 1 / 由来タイプ: 合成 / 由来: (合成) synthetic construct (人工物) |
-非ポリマー , 3種, 9分子
#9: 化合物 | ChemComp-MG / #10: 化合物 | ChemComp-AGS / #11: 化合物 | ChemComp-ADP / | |
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-詳細
研究の焦点であるリガンドがあるか | Y |
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-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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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: the human clamp-clamp loader complex PCNA-CTF18 / タイプ: COMPLEX / Entity ID: #1-#6 / 由来: RECOMBINANT |
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分子量 | 値: 0.3 MDa / 実験値: YES |
由来(天然) | 生物種: Homo sapiens (ヒト) |
由来(組換発現) | 生物種: Insect cell expression vector pTIE1 (その他) |
緩衝液 | pH: 7.5 |
試料 | 濃度: 0.3 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | グリッドのタイプ: Quantifoil R2/1 |
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: 280 K |
-電子顕微鏡撮影
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |
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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 / 最大 デフォーカス(公称値): 1900 nm / 最小 デフォーカス(公称値): 1200 nm |
撮影 | 電子線照射量: 60 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
-解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
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3次元再構成 | 解像度: 2.75 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 212091 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
原子モデル構築 | B value: 123 / プロトコル: RIGID BODY FIT / 空間: REAL | ||||||||||||||||||||||||
拘束条件 |
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