- EMDB-26087: Human telomerase catalytic core with shelterin protein TPP1 -
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基本情報
登録情報
データベース: EMDB / ID: EMD-26087
タイトル
Human telomerase catalytic core with shelterin protein TPP1
マップデータ
Telomerase catalytic core structure with shelterin protein TPP1
試料
複合体: active human telomerase RNP with shelterin protein TPP1
RNA: Telomerase RNA, partial sequence
タンパク質・ペプチド: Telomerase reverse transcriptase
DNA: Telomeric repeat substrate
タンパク質・ペプチド: Adrenocortical dysplasia protein homolog
キーワード
DNA / RNA / REPLICATION
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 / RNA-templated DNA biosynthetic process / telomerase inhibitor activity / 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 maintenance via recombination / telomere capping / 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 / Removal of the Flap Intermediate from the C-strand / telomerase holoenzyme complex / 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 / Telomere Extension By Telomerase / replicative senescence / 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 / positive regulation of angiogenesis / RNA-directed DNA polymerase activity / protein import into nucleus / protein-folding chaperone binding / heart development / cellular response to hypoxia / negative regulation of neuron apoptotic process / chromosome, telomeric region / tRNA binding / nuclear speck / nuclear body / 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)
R35GM131901
米国
National Science Foundation (NSF, United States)
MCB2016540
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM071940
米国
引用
ジャーナル: Nature / 年: 2022 タイトル: Structure of active human telomerase with telomere shelterin protein TPP1. 著者: Baocheng Liu / Yao He / Yaqiang Wang / He Song / Z Hong Zhou / Juli Feigon / 要旨: Human telomerase is a RNA-protein complex that extends the 3' end of linear chromosomes by synthesizing multiple copies of the telomeric repeat TTAGGG. Its activity is a determinant of cancer ...Human telomerase is a RNA-protein complex that extends the 3' end of linear chromosomes by synthesizing multiple copies of the telomeric repeat TTAGGG. Its activity is a determinant of cancer progression, stem cell renewal and cellular aging. Telomerase is recruited to telomeres and activated for telomere repeat synthesis by the telomere shelterin protein TPP1. Human telomerase has a bilobal structure with a catalytic core ribonuclear protein and a H and ACA box ribonuclear protein. Here we report cryo-electron microscopy structures of human telomerase catalytic core of telomerase reverse transcriptase (TERT) and telomerase RNA (TER (also known as hTR)), and of telomerase with the shelterin protein TPP1. TPP1 forms a structured interface with the TERT-unique telomerase essential N-terminal domain (TEN) and the telomerase RAP motif (TRAP) that are unique to TERT, and conformational dynamics of TEN-TRAP are damped upon TPP1 binding, defining the requirements for recruitment and activation. The structures further reveal that the elements of TERT and TER that are involved in template and telomeric DNA handling-including the TEN domain and the TRAP-thumb helix channel-are largely structurally homologous to those in Tetrahymena telomerase, and provide unique insights into the mechanism of telomerase activity. The binding site of the telomerase inhibitor BIBR1532 overlaps a critical interaction between the TER pseudoknot and the TERT thumb domain. Numerous mutations leading to telomeropathies are located at the TERT-TER and TEN-TRAP-TPP1 interfaces, highlighting the importance of TER-TERT and TPP1 interactions for telomerase activity, recruitment and as drug targets.