- EMDB-52979: Catalytic core 1 of dimeric human telomerase -
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基本情報
登録情報
データベース: EMDB / ID: EMD-52979
タイトル
Catalytic core 1 of dimeric human telomerase
マップデータ
試料
複合体: Catalytic core 1 of dimeric human telomerase
タンパク質・ペプチド: Telomerase reverse transcriptase
RNA: hTR, human telomerase RNA (253-mer)
タンパク質・ペプチド: Histone H2A
タンパク質・ペプチド: Histone H2B
DNA: DNA (5'-D(P*GP*TP*TP*AP*GP*GP*G)-3')
タンパク質・ペプチド: Adrenocortical dysplasia protein homolog
キーワード
Human telomerase catalytic core / reverse transcriptase / DNA substrate bound / DNA BINDING PROTEIN
機能・相同性
機能・相同性情報
telomere assembly / positive regulation of hair cycle / template-free RNA nucleotidyltransferase / positive regulation of transdifferentiation / TERT-RMRP complex / DNA strand elongation / RNA-directed RNA polymerase complex / segmentation / siRNA transcription / urogenital system development ...telomere assembly / positive regulation of hair cycle / template-free RNA nucleotidyltransferase / positive regulation of transdifferentiation / TERT-RMRP complex / DNA strand elongation / RNA-directed RNA polymerase complex / segmentation / siRNA transcription / urogenital system development / positive regulation of protein localization to nucleolus / telomerase catalytic core complex / protection from non-homologous end joining at telomere / telomerase inhibitor activity / RNA-templated DNA biosynthetic process / establishment of protein localization to telomere / regulation of establishment of protein localization to telomere / telomerase activity / shelterin complex / Telomere C-strand synthesis initiation / Regulation of MITF-M-dependent genes involved in DNA replication, damage repair and senescence / Telomere C-strand (Lagging Strand) Synthesis / nuclear telomere cap complex / siRNA processing / telomere capping / telomere maintenance via recombination / Processive synthesis on the C-strand of the telomere / Polymerase switching on the C-strand of the telomere / positive regulation of vascular associated smooth muscle cell migration / telomerase holoenzyme complex / Removal of the Flap Intermediate from the C-strand / telomerase RNA binding / embryonic limb morphogenesis / protein localization to chromosome, telomeric region / DNA biosynthetic process / RNA-templated transcription / telomeric DNA binding / positive regulation of stem cell proliferation / negative regulation of telomere maintenance via telomerase / positive regulation of telomere maintenance / mitochondrial nucleoid / negative regulation of cellular senescence / replicative senescence / Telomere Extension By Telomerase / positive regulation of Wnt signaling pathway / negative regulation of extrinsic apoptotic signaling pathway in absence of ligand / positive regulation of G1/S transition of mitotic cell cycle / response to cadmium ion / positive regulation of protein binding / telomere maintenance via telomerase / negative regulation of endothelial cell apoptotic process / positive regulation of vascular associated smooth muscle cell proliferation / Packaging Of Telomere Ends / DNA polymerase binding / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / 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 / Meiotic synapsis / skeletal system development / positive regulation of D-glucose import / mitochondrion organization / intracellular protein transport / Formation of the beta-catenin:TCF transactivating complex / PML body / regulation of protein stability / DNA Damage/Telomere Stress Induced Senescence / positive regulation of miRNA transcription / RNA-directed DNA polymerase / transcription coactivator binding / RNA-directed DNA polymerase activity / positive regulation of angiogenesis / protein import into nucleus / structural constituent of chromatin / nucleosome / protein-folding chaperone binding / heart development / cellular response to hypoxia / negative regulation of neuron apoptotic process / tRNA binding / chromosome, telomeric region / nuclear speck / nuclear body / protein heterodimerization activity / RNA-directed RNA polymerase activity / protein-containing complex binding / nucleolus / protein homodimerization activity / DNA binding / RNA binding / nucleoplasm / metal ion binding / identical protein binding / nucleus / plasma membrane / cytosol 類似検索 - 分子機能
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
2R35GM122579
米国
Howard Hughes Medical Institute (HHMI)
米国
Chinese Scholarship Council
202206620047
中国
Biotechnology and Biological Sciences Research Council (BBSRC)
BB/X01102X/1
英国
引用
ジャーナル: Science / 年: 2025 タイトル: Cryo-EM structure of human telomerase dimer reveals H/ACA RNP-mediated dimerization. 著者: Sebastian Balch / Zala Sekne / Elsa Franco-Echevarría / Patryk Ludzia / Rachael C Kretsch / Wenqing Sun / Haopeng Yu / George E Ghanim / Sigurdur Thorkelsson / Yiliang Ding / Rhiju Das / Thi ...著者: Sebastian Balch / Zala Sekne / Elsa Franco-Echevarría / Patryk Ludzia / Rachael C Kretsch / Wenqing Sun / Haopeng Yu / George E Ghanim / Sigurdur Thorkelsson / Yiliang Ding / Rhiju Das / Thi Hoang Duong Nguyen / 要旨: Telomerase ribonucleoprotein (RNP) synthesizes telomeric repeats at chromosome ends using a telomerase reverse transcriptase (TERT) and a telomerase RNA (hTR in humans). Previous structural work ...Telomerase ribonucleoprotein (RNP) synthesizes telomeric repeats at chromosome ends using a telomerase reverse transcriptase (TERT) and a telomerase RNA (hTR in humans). Previous structural work showed that human telomerase is typically monomeric, containing a single copy of TERT and hTR. Evidence for dimeric complexes exists, although the composition, high-resolution structure, and function remain elusive. Here, we report the cryo-electron microscopy (cryo-EM) structure of a human telomerase dimer bound to telomeric DNA. The structure reveals a 26-subunit assembly and a dimerization interface mediated by the Hinge and ACA box (H/ACA) RNP of telomerase. Premature aging disease mutations map to this interface. Disrupting dimer formation affects RNP assembly, bulk telomerase activity, and telomere maintenance in cells. Our findings address a long-standing enigma surrounding the telomerase dimer and suggest a role for the dimer in telomerase assembly.