- EMDB-48312: Catalytic domain of human DNA polymerase alpha in complex with DN... -
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基本情報
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データベース: EMDB / ID: EMD-48312
タイトル
Catalytic domain of human DNA polymerase alpha in complex with DNA and RPA
マップデータ
composite map, 3.5 angstrom
試料
複合体: Ternary complex of DNA polymerase alpha with DNA and replication protein A
タンパク質・ペプチド: Replication protein A 14 kDa subunit
タンパク質・ペプチド: Replication protein A 32 kDa subunit
タンパク質・ペプチド: Replication protein A 70 kDa DNA-binding subunit
Other: RNA-DNA primer (11-mer)
タンパク質・ペプチド: DNA polymerase alpha catalytic subunit
DNA: DNA template (35-mer)
リガンド: ZINC ION
リガンド: MAGNESIUM ION
リガンド: 2'-DEOXYCYTIDINE-5'-TRIPHOSPHATE
キーワード
DNA replication / Replication-DNA-RNA complex
機能・相同性
機能・相同性情報
protein localization to chromosome / DNA replication factor A complex / DNA replication initiation / Inhibition of replication initiation of damaged DNA by RB1/E2F1 / Telomere C-strand synthesis initiation / alpha DNA polymerase:primase complex / regulation of type I interferon production / Polymerase switching / Processive synthesis on the lagging strand / single-stranded telomeric DNA binding ...protein localization to chromosome / DNA replication factor A complex / DNA replication initiation / Inhibition of replication initiation of damaged DNA by RB1/E2F1 / Telomere C-strand synthesis initiation / alpha DNA polymerase:primase complex / regulation of type I interferon production / Polymerase switching / Processive synthesis on the lagging strand / single-stranded telomeric DNA binding / Removal of the Flap Intermediate / lateral element / lagging strand elongation / G-rich strand telomeric DNA binding / regulation of DNA damage checkpoint / mitotic DNA replication initiation / protein localization to site of double-strand break / Mismatch repair (MMR) directed by MSH2:MSH3 (MutSbeta) / Mismatch repair (MMR) directed by MSH2:MSH6 (MutSalpha) / DNA replication, synthesis of primer / Polymerase switching on the C-strand of the telomere / chromatin-protein adaptor activity / Removal of the Flap Intermediate from the C-strand / HDR through Single Strand Annealing (SSA) / DNA strand elongation involved in DNA replication / regulation of double-strand break repair via homologous recombination / leading strand elongation / G1/S-Specific Transcription / telomeric repeat DNA binding / DNA synthesis involved in DNA repair / Impaired BRCA2 binding to RAD51 / hemopoiesis / DNA replication origin binding / PCNA-Dependent Long Patch Base Excision Repair / Activation of the pre-replicative complex / Regulation of HSF1-mediated heat shock response / DNA replication initiation / Presynaptic phase of homologous DNA pairing and strand exchange / HSF1 activation / Activation of ATR in response to replication stress / telomere maintenance via telomerase / mismatch repair / SUMOylation of DNA damage response and repair proteins / site of DNA damage / mitotic G1 DNA damage checkpoint signaling / homeostasis of number of cells within a tissue / regulation of mitotic cell cycle / telomere maintenance / Translesion synthesis by REV1 / Translesion synthesis by POLK / Translesion synthesis by POLI / male germ cell nucleus / Gap-filling DNA repair synthesis and ligation in GG-NER / meiotic cell cycle / Defective pyroptosis / nucleotide-excision repair / Fanconi Anemia Pathway / Termination of translesion DNA synthesis / Translesion Synthesis by POLH / Recognition of DNA damage by PCNA-containing replication complex / G2/M DNA damage checkpoint / base-excision repair / PML body / DNA-templated DNA replication / double-strand break repair via homologous recombination / Meiotic recombination / double-strand break repair via nonhomologous end joining / HDR through Homologous Recombination (HRR) / Dual Incision in GG-NER / nuclear matrix / Formation of Incision Complex in GG-NER / Dual incision in TC-NER / Gap-filling DNA repair synthesis and ligation in TC-NER / nuclear envelope / regulation of cell population proliferation / single-stranded DNA binding / site of double-strand break / Processing of DNA double-strand break ends / DNA recombination / protein phosphatase binding / Regulation of TP53 Activity through Phosphorylation / DNA-directed DNA polymerase / in utero embryonic development / damaged DNA binding / DNA-directed DNA polymerase activity / chromosome, telomeric region / DNA replication / nuclear body / nucleotide binding / DNA repair / positive regulation of cell population proliferation / DNA damage response / chromatin binding / ubiquitin protein ligase binding / protein kinase binding / chromatin / nucleolus / enzyme binding / DNA binding / zinc ion binding 類似検索 - 分子機能
Replication factor A protein 2 / Replication protein A, C-terminal / Replication protein A C terminal / Replication factor A protein 3 / Replication factor A protein 3 / Replication factor-A protein 1, N-terminal domain / Replication factor A protein-like / Replication factor A protein 1 / Replication factor-A protein 1, N-terminal / Replication protein A, OB domain ...Replication factor A protein 2 / Replication protein A, C-terminal / Replication protein A C terminal / Replication factor A protein 3 / Replication factor A protein 3 / Replication factor-A protein 1, N-terminal domain / Replication factor A protein-like / Replication factor A protein 1 / Replication factor-A protein 1, N-terminal / Replication protein A, OB domain / Replication protein A OB domain / : / Replication factor A, C-terminal / Replication factor-A C terminal domain / DNA polymerase alpha catalytic subunit, N-terminal domain / DNA polymerase alpha, zinc finger domain superfamily / DNA Polymerase alpha zinc finger / DNA polymerase alpha subunit p180 N terminal / Zinc finger, DNA-directed DNA polymerase, family B, alpha / DNA polymerase alpha catalytic subunit, catalytic domain / OB-fold nucleic acid binding domain, AA-tRNA synthetase-type / OB-fold nucleic acid binding domain / DNA polymerase family B, thumb domain / DNA-directed DNA polymerase, family B, multifunctional domain / DNA-directed DNA polymerase, family B, conserved site / DNA polymerase family B signature. / DNA polymerase family B / DNA polymerase family B, exonuclease domain / DNA-directed DNA polymerase, family B, exonuclease domain / DNA polymerase, palm domain superfamily / DNA polymerase type-B family / DNA-directed DNA polymerase, family B / Ribonuclease H superfamily / Ribonuclease H-like superfamily / Winged helix DNA-binding domain superfamily / Winged helix-like DNA-binding domain superfamily / Nucleic acid-binding, OB-fold / DNA/RNA polymerase superfamily 類似検索 - ドメイン・相同性
DNA polymerase alpha catalytic subunit / Replication protein A 32 kDa subunit / Replication protein A 70 kDa DNA-binding subunit / Replication protein A 14 kDa subunit 類似検索 - 構成要素
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35GM152032
米国
引用
ジャーナル: Nucleic Acids Res / 年: 2025 タイトル: The human primosome requires replication protein A when copying DNA with inverted repeats. 著者: Andrey G Baranovskiy / Lucia M Morstadt / Eduardo E Romero / Nigar D Babayeva / Tahir H Tahirov / 要旨: The human primosome, a four-subunit complex of primase and DNA polymerase alpha (Polα), initiates DNA synthesis on both chromosome strands by generating chimeric RNA-DNA primers for loading DNA ...The human primosome, a four-subunit complex of primase and DNA polymerase alpha (Polα), initiates DNA synthesis on both chromosome strands by generating chimeric RNA-DNA primers for loading DNA polymerases delta and epsilon (Polϵ). Replication protein A (RPA) tightly binds to single-stranded DNA strands, protecting them from nucleolytic digestion and unauthorized transactions. We report here that RPA plays a critical role for the human primosome during DNA synthesis across inverted repeats prone to hairpin formation. On other alternatively structured DNA, forming a G-quadruplex, RPA does not assist primosome. A stimulatory effect of RPA on DNA synthesis across hairpins was also observed for the catalytic domain of Polα but not of Polϵ. The winged helix-turn-helix domain of RPA is essential for an efficient hairpin bypass and increases RPA-Polα cooperativity on the primed DNA template. Cryo-EM studies revealed that this domain is mainly responsible for the interaction between RPA and Polα. The flexible mode of RPA-Polα interaction during DNA synthesis implies the mechanism of template handover between them when the hairpin formation should be avoided. This work provides insight into a cooperative action of RPA and primosome on DNA, which is critical for DNA synthesis across inverted repeats.