- EMDB-52960: Cryo-EM structure of human Mre11-Rad50-Nbs1 complex bound to DNA -
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基本情報
登録情報
データベース: EMDB / ID: EMD-52960
タイトル
Cryo-EM structure of human Mre11-Rad50-Nbs1 complex bound to DNA
マップデータ
試料
複合体: Mre11-Rad50-Nbs1-DNA complex
DNA: DNA (50-MER)
DNA: DNA (50-MER)
タンパク質・ペプチド: Nibrin
タンパク質・ペプチド: DNA repair protein RAD50
タンパク質・ペプチド: Double-strand break repair protein MRE11
リガンド: MAGNESIUM ION
リガンド: ADENOSINE-5'-DIPHOSPHATE
リガンド: BERYLLIUM TRIFLUORIDE ION
リガンド: MANGANESE (II) ION
リガンド: water
キーワード
Mre11-Rad50-Nbs1 complex / double-strand DNA break repair protein / nuclease / HYDROLASE
機能・相同性
機能・相同性情報
chromosomal region / telomeric 3' overhang formation / mitochondrial double-strand break repair via homologous recombination / telomere maintenance via telomere trimming / Mre11 complex / negative regulation of double-strand break repair via nonhomologous end joining / negative regulation of telomere capping / BRCA1-C complex / blastocyst growth / meiotic DNA double-strand break formation ...chromosomal region / telomeric 3' overhang formation / mitochondrial double-strand break repair via homologous recombination / telomere maintenance via telomere trimming / Mre11 complex / negative regulation of double-strand break repair via nonhomologous end joining / negative regulation of telomere capping / BRCA1-C complex / blastocyst growth / meiotic DNA double-strand break formation / Sensing of DNA Double Strand Breaks / regulation of mitotic recombination / protection from non-homologous end joining at telomere / R-loop processing / 加水分解酵素; 酸無水物に作用 / single-stranded DNA endonuclease activity / phosphorylation-dependent protein binding / homologous chromosome pairing at meiosis / chromosome organization involved in meiotic cell cycle / DNA strand resection involved in replication fork processing / nuclear inclusion body / homologous recombination / t-circle formation / double-stranded telomeric DNA binding / nuclease activity / G-quadruplex DNA binding / DNA double-strand break processing / single-stranded telomeric DNA binding / 3'-5'-DNA exonuclease activity / double-strand break repair via alternative nonhomologous end joining / mitotic G2/M transition checkpoint / isotype switching / Cytosolic sensors of pathogen-associated DNA / Impaired BRCA2 binding to PALB2 / protein localization to site of double-strand break / HDR through MMEJ (alt-NHEJ) / telomere maintenance via recombination / IRF3-mediated induction of type I IFN / chromatin-protein adaptor activity / mitotic intra-S DNA damage checkpoint signaling / reciprocal meiotic recombination / regulation of DNA-templated DNA replication initiation / neuromuscular process controlling balance / sister chromatid cohesion / HDR through Single Strand Annealing (SSA) / positive regulation of double-strand break repair / Homologous DNA Pairing and Strand Exchange / Defective homologous recombination repair (HRR) due to BRCA1 loss of function / Defective HDR through Homologous Recombination Repair (HRR) due to PALB2 loss of BRCA1 binding function / Defective HDR through Homologous Recombination Repair (HRR) due to PALB2 loss of BRCA2/RAD51/RAD51C binding function / Resolution of D-loop Structures through Synthesis-Dependent Strand Annealing (SDSA) / Resolution of D-loop Structures through Holliday Junction Intermediates / mitotic G2 DNA damage checkpoint signaling / telomere maintenance in response to DNA damage / Impaired BRCA2 binding to RAD51 / positive regulation of telomere maintenance / neuroblast proliferation / Presynaptic phase of homologous DNA pairing and strand exchange / protein K63-linked ubiquitination / telomere maintenance via telomerase / positive regulation of double-strand break repair via homologous recombination / 3'-5' exonuclease activity / intrinsic apoptotic signaling pathway / telomere maintenance / DNA damage checkpoint signaling / replication fork / condensed nuclear chromosome / protein serine/threonine kinase activator activity / meiotic cell cycle / DNA endonuclease activity / DNA damage response, signal transduction by p53 class mediator / Nonhomologous End-Joining (NHEJ) / G2/M DNA damage checkpoint / PML body / DNA Damage/Telomere Stress Induced Senescence / double-strand break repair via homologous recombination / Meiotic recombination / double-strand break repair via nonhomologous end joining / HDR through Homologous Recombination (HRR) / double-strand break repair / manganese ion binding / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / site of double-strand break / Processing of DNA double-strand break ends / double-stranded DNA binding / DNA recombination / histone binding / Regulation of TP53 Activity through Phosphorylation / DNA-binding transcription factor binding / damaged DNA binding / 加水分解酵素; エステル加水分解酵素 / protein-macromolecule adaptor activity / chromosome, telomeric region / cell population proliferation / regulation of cell cycle / cadherin binding / DNA repair / DNA damage response / negative regulation of apoptotic process / nucleolus 類似検索 - 分子機能
Nibrin, C-terminal / Nibrin / DNA damage repair protein Nbs1 / DNA damage repair protein Nbs1 / Nibrin, second BRCT domain / Nibrin, second BRCT domain superfamily / Second BRCT domain on Nijmegen syndrome breakage protein / DNA repair protein Rad50, eukaryotes / Nibrin-related / DNA double-strand break repair protein Mre11 ...Nibrin, C-terminal / Nibrin / DNA damage repair protein Nbs1 / DNA damage repair protein Nbs1 / Nibrin, second BRCT domain / Nibrin, second BRCT domain superfamily / Second BRCT domain on Nijmegen syndrome breakage protein / DNA repair protein Rad50, eukaryotes / Nibrin-related / DNA double-strand break repair protein Mre11 / Mre11, DNA-binding / Mre11, capping domain / Mre11 DNA-binding presumed domain / Mre11 DNA-binding presumed domain / Rad50 zinc hook motif / RAD50, zinc hook / Rad50 zinc-hook domain profile. / SbcC/RAD50-like, Walker B motif / Mre11 nuclease, N-terminal metallophosphatase domain / Rad50/SbcC-type AAA domain / AAA domain / Forkhead associated domain / Forkhead-associated (FHA) domain profile. / FHA domain / Forkhead-associated (FHA) domain / SMAD/FHA domain superfamily / BRCA1 C Terminus (BRCT) domain / Calcineurin-like phosphoesterase domain, ApaH type / Calcineurin-like phosphoesterase / Metallo-dependent phosphatase-like / BRCT domain / BRCT domain superfamily / P-loop containing nucleoside triphosphate hydrolase 類似検索 - ドメイン・相同性
Nibrin / Double-strand break repair protein MRE11 / DNA repair protein RAD50 類似検索 - 構成要素
ジャーナル: Nat Commun / 年: 2025 タイトル: Structural basis for DNA break sensing by human MRE11-RAD50-NBS1 and its regulation by telomeric factor TRF2. 著者: Yilan Fan / Filiz Kuybu / Hengjun Cui / Katja Lammens / Jia-Xuan Chen / Michael Kugler / Christophe Jung / Karl-Peter Hopfner / 要旨: The MRE11-RAD50-NBS1 (MRN) complex is a central, multifunctional factor in the detection, signaling and nucleolytic processing of DNA double-strand breaks (DSBs). To clarify how human MRN binds ...The MRE11-RAD50-NBS1 (MRN) complex is a central, multifunctional factor in the detection, signaling and nucleolytic processing of DNA double-strand breaks (DSBs). To clarify how human MRN binds generic and telomeric DNA ends and can separate DNA end sensing from nuclease activities, we determined cryo-electron microscopy (cryo-EM) structures of human MRN bound to DNA and to DNA and the telomere protection factor TRF2. MRN senses DSBs through a tight clamp-like sensing state with closed coiled-coil domains, but auto-inhibited MRE11 nuclease. NBS1 wraps around the MRE11 dimer, with NBS1's ATM recruitment motif sequestered by binding to the regulatory RAD50 S site, necessitating a switch in the NBS1 C helix for ATM activation. At telomeric DNA, TRF2 blocks the second S site via the iDDR motif to prevent nuclease and ATM activation. Our results provide a structural framework for DNA sensing via a gating mechanism and separation of sensing, signaling and processing activities of mammalian MRN.
名称: Double-strand break repair protein MRE11 / タイプ: protein_or_peptide / ID: 5 詳細: His129 was mutated to Asn for nuclease-dead variant. Following residue R708 is a short GS linker, a PreScission cleavage site, and two FLAG tags. コピー数: 2 / 光学異性体: LEVO EC番号: 加水分解酵素; エステル加水分解酵素