- EMDB-52964: Cryo-EM structure of human Mre11-Rad50-Nbs1 (MRN) complex bound t... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-52964
タイトル
Cryo-EM structure of human Mre11-Rad50-Nbs1 (MRN) complex bound to DNA and telomeric factor TRF2
マップデータ
試料
複合体: MRN-TRF2-DNA complex
タンパク質・ペプチド: x 4種
DNA: x 2種
リガンド: x 5種
キーワード
Mre11-Rad50-Nbs1-TRF2 complex / double-strand DNA break repair protein / nuclease / HYDROLASE
機能・相同性
機能・相同性情報
telomere maintenance via telomere trimming / chromosomal region / axonal transport of messenger ribonucleoprotein complex / negative regulation of telomere single strand break repair / telomeric 3' overhang formation / negative regulation of telomere maintenance via recombination / telomeric loop formation / mitochondrial double-strand break repair via homologous recombination / Mre11 complex / negative regulation of telomere maintenance via semi-conservative replication ...telomere maintenance via telomere trimming / chromosomal region / axonal transport of messenger ribonucleoprotein complex / negative regulation of telomere single strand break repair / telomeric 3' overhang formation / negative regulation of telomere maintenance via recombination / telomeric loop formation / mitochondrial double-strand break repair via homologous recombination / Mre11 complex / negative regulation of telomere maintenance via semi-conservative replication / negative regulation of telomeric D-loop disassembly / negative regulation of double-strand break repair via nonhomologous end joining / blastocyst growth / negative regulation of telomere capping / BRCA1-C complex / Sensing of DNA Double Strand Breaks / meiotic DNA double-strand break formation / protection from non-homologous end joining at telomere / regulation of mitotic recombination / RNA-templated DNA biosynthetic process / R-loop processing / 加水分解酵素; 酸無水物に作用 / negative regulation of telomere maintenance / t-circle formation / negative regulation of t-circle formation / telomeric D-loop disassembly / single-stranded DNA endodeoxyribonuclease activity / chromosome organization involved in meiotic cell cycle / shelterin complex / phosphorylation-dependent protein binding / Telomere C-strand synthesis initiation / homologous chromosome pairing at meiosis / regulation of telomere maintenance via telomerase / double-stranded telomeric DNA binding / DNA strand resection involved in replication fork processing / nuclease activity / homologous recombination / G-quadruplex DNA binding / nuclear inclusion body / 3'-5'-DNA exonuclease activity / DNA double-strand break processing / Telomere C-strand (Lagging Strand) Synthesis / single-stranded telomeric DNA binding / nuclear telomere cap complex / Impaired BRCA2 binding to PALB2 / double-strand break repair via alternative nonhomologous end joining / chromatin-protein adaptor activity / G-rich strand telomeric DNA binding / protein localization to site of double-strand break / telomere capping / telomere maintenance via recombination / isotype switching / Cytosolic sensors of pathogen-associated DNA / mitotic G2/M transition checkpoint / HDR through MMEJ (alt-NHEJ) / Processive synthesis on the C-strand of the telomere / Polymerase switching on the C-strand of the telomere / IRF3-mediated induction of type I IFN / Removal of the Flap Intermediate from the C-strand / reciprocal meiotic recombination / mitotic intra-S DNA damage checkpoint signaling / regulation of telomere maintenance / regulation of DNA-templated DNA replication initiation / negative regulation of telomere maintenance via telomere lengthening / sister chromatid cohesion / 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 / protein localization to chromosome, telomeric region / Resolution of D-loop Structures through Synthesis-Dependent Strand Annealing (SDSA) / Resolution of D-loop Structures through Holliday Junction Intermediates / HDR through Single Strand Annealing (SSA) / neuromuscular process controlling balance / positive regulation of double-strand break repair / telomeric DNA binding / Impaired BRCA2 binding to RAD51 / negative regulation of telomere maintenance via telomerase / mitotic G2 DNA damage checkpoint signaling / positive regulation of telomere maintenance / telomere maintenance in response to DNA damage / Presynaptic phase of homologous DNA pairing and strand exchange / negative regulation of cellular senescence / Telomere Extension By Telomerase / protein K63-linked ubiquitination / neuroblast proliferation / telomere maintenance via telomerase / positive regulation of double-strand break repair via homologous recombination / Packaging Of Telomere Ends / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / 3'-5' exonuclease activity / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Cleavage of the damaged pyrimidine / telomere maintenance / Inhibition of DNA recombination at telomere / intrinsic apoptotic signaling pathway / Meiotic synapsis / DNA damage checkpoint signaling / replication fork 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 / Telomeric repeat-binding factor 2, Rap1-binding domain ...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 / Telomeric repeat-binding factor 2, Rap1-binding domain / Telomeric repeat-binding factor 2 Rap1-binding motif / Telomeric repeat-binding factor 2 / 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. / Telomeric repeat-binding factor 1/2 / Telomere repeat-binding factor, dimerisation domain superfamily / Telomere repeat-binding factor, dimerisation domain / Telomere repeat binding factor (TRF) / Mre11 nuclease, N-terminal metallophosphatase domain / SbcC/RAD50-like, Walker B motif / Rad50/SbcC-type AAA domain / AAA domain / Myb-type HTH DNA-binding domain profile. / Forkhead associated domain / Forkhead-associated (FHA) domain profile. / FHA domain / Forkhead-associated (FHA) domain / Myb domain / Myb-like DNA-binding domain / SMAD/FHA domain superfamily / BRCA1 C Terminus (BRCT) domain / Calcineurin-like phosphoesterase domain, ApaH type / Calcineurin-like phosphoesterase / Metallo-dependent phosphatase-like / SANT SWI3, ADA2, N-CoR and TFIIIB'' DNA-binding domains / SANT/Myb domain / BRCT domain / BRCT domain superfamily / Homeobox-like 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 / Telomeric repeat-binding factor 2 / 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: 6 詳細: 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