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データを開く
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基本情報
登録情報 | データベース: PDB / ID: 7v99 | ||||||
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タイトル | catalytic core of human telomerase holoenzyme | ||||||
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![]() | REPLICATION / Telomerase | ||||||
機能・相同性 | ![]() positive regulation of hair cycle / template-free RNA nucleotidyltransferase / positive regulation of transdifferentiation / TERT-RMRP complex / DNA strand elongation / RNA-directed RNA polymerase complex / siRNA transcription / positive regulation of protein localization to nucleolus / telomerase catalytic core complex / RNA-templated DNA biosynthetic process ...positive regulation of hair cycle / template-free RNA nucleotidyltransferase / positive regulation of transdifferentiation / TERT-RMRP complex / DNA strand elongation / RNA-directed RNA polymerase complex / siRNA transcription / positive regulation of protein localization to nucleolus / telomerase catalytic core complex / RNA-templated DNA biosynthetic process / establishment of protein localization to telomere / telomerase activity / Regulation of MITF-M-dependent genes involved in DNA replication, damage repair and senescence / nuclear telomere cap complex / siRNA processing / telomere maintenance via recombination / positive regulation of vascular associated smooth muscle cell migration / telomerase holoenzyme complex / telomerase RNA binding / DNA biosynthetic process / RNA-templated transcription / telomeric DNA binding / positive regulation of stem cell proliferation / 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 / protein localization to CENP-A containing chromatin / Replacement of protamines by nucleosomes in the male pronucleus / CENP-A containing nucleosome / positive regulation of vascular associated smooth muscle cell proliferation / Packaging Of Telomere Ends / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / Deposition of new CENPA-containing nucleosomes at the centromere / 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 / RNA Polymerase I Promoter Opening / Meiotic synapsis / Assembly of the ORC complex at the origin of replication / Regulation of endogenous retroelements by the Human Silencing Hub (HUSH) complex / DNA methylation / Condensation of Prophase Chromosomes / Chromatin modifications during the maternal to zygotic transition (MZT) / SIRT1 negatively regulates rRNA expression / HCMV Late Events / ERCC6 (CSB) and EHMT2 (G9a) positively regulate rRNA expression / innate immune response in mucosa / PRC2 methylates histones and DNA / Regulation of endogenous retroelements by KRAB-ZFP proteins / Defective pyroptosis / positive regulation of D-glucose import / mitochondrion organization / Regulation of endogenous retroelements by Piwi-interacting RNAs (piRNAs) / HDACs deacetylate histones / Nonhomologous End-Joining (NHEJ) / RNA Polymerase I Promoter Escape / Transcriptional regulation by small RNAs / Formation of the beta-catenin:TCF transactivating complex / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / Activated PKN1 stimulates transcription of AR (androgen receptor) regulated genes KLK2 and KLK3 / G2/M DNA damage checkpoint / Metalloprotease DUBs / PML body / NoRC negatively regulates rRNA expression / regulation of protein stability / B-WICH complex positively regulates rRNA expression / DNA Damage/Telomere Stress Induced Senescence / Meiotic recombination / positive regulation of miRNA transcription / Pre-NOTCH Transcription and Translation / RNA-directed DNA polymerase / RMTs methylate histone arginines / Activation of anterior HOX genes in hindbrain development during early embryogenesis / transcription coactivator binding / Transcriptional regulation of granulopoiesis / RNA-directed DNA polymerase activity / positive regulation of angiogenesis / UCH proteinases / HCMV Early Events / protein import into nucleus / antimicrobial humoral immune response mediated by antimicrobial peptide / structural constituent of chromatin / antibacterial humoral response / E3 ubiquitin ligases ubiquitinate target proteins / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / nucleosome / heterochromatin formation / RUNX1 regulates transcription of genes involved in differentiation of HSCs / Processing of DNA double-strand break ends / protein-folding chaperone binding 類似検索 - 分子機能 | ||||||
生物種 | ![]() | ||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.54 Å | ||||||
![]() | Wan, F. / Ding, Y. / Yang, L. / Wu, Z. / Wu, J. / Lei, M. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Zipper head mechanism of telomere synthesis by human telomerase. 著者: Futang Wan / Yongbo Ding / Yuebin Zhang / Zhenfang Wu / Shaobai Li / Lin Yang / Xiangyu Yan / Pengfei Lan / Guohui Li / Jian Wu / Ming Lei / ![]() 要旨: Telomerase, a multi-subunit ribonucleoprotein complex, is a unique reverse transcriptase that catalyzes the processive addition of a repeat sequence to extend the telomere end using a short fragment ...Telomerase, a multi-subunit ribonucleoprotein complex, is a unique reverse transcriptase that catalyzes the processive addition of a repeat sequence to extend the telomere end using a short fragment of its own RNA component as the template. Despite recent structural characterizations of human and Tetrahymena telomerase, it is still a mystery how telomerase repeatedly uses its RNA template to synthesize telomeric DNA. Here, we report the cryo-EM structure of human telomerase holoenzyme bound with telomeric DNA at resolutions of 3.5 Å and 3.9 Å for the catalytic core and biogenesis module, respectively. The structure reveals that a leucine residue Leu980 in telomerase reverse transcriptase (TERT) catalytic subunit functions as a zipper head to limit the length of the short primer-template duplex in the active center. Moreover, our structural and computational analyses suggest that TERT and telomerase RNA (hTR) are organized to harbor a preformed active site that can accommodate short primer-template duplex substrates for catalysis. Furthermore, our findings unveil a double-fingers architecture in TERT that ensures nucleotide addition processivity of human telomerase. We propose that the zipper head Leu980 is a structural determinant for the sequence-based pausing signal of DNA synthesis that coincides with the RNA element-based physical template boundary. Functional analyses unveil that the non-glycine zipper head plays an essential role in both telomerase repeat addition processivity and telomere length homeostasis. In addition, we also demonstrate that this zipper head mechanism is conserved in all eukaryotic telomerases. Together, our study provides an integrated model for telomerase-mediated telomere synthesis. | ||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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ダウンロード
PDBx/mmCIF形式 | ![]() | 340 KB | 表示 | ![]() |
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PDB形式 | ![]() | 261.5 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 828.7 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 849.3 KB | 表示 | |
XML形式データ | ![]() | 41 KB | 表示 | |
CIF形式データ | ![]() | 64 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 31811MC ![]() 7v9aC M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
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類似構造データ | 類似検索 - 機能・相同性 ![]() |
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リンク
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集合体
登録構造単位 | ![]()
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1 |
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要素
#1: タンパク質 | 分子量: 127195.812 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() |
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#2: タンパク質 | 分子量: 14034.355 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() |
#3: タンパク質 | 分子量: 13790.018 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() |
#4: RNA鎖 | 分子量: 145477.797 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() |
#5: DNA鎖 | 分子量: 7339.724 Da / 分子数: 1 / 由来タイプ: 合成 / 由来: (合成) ![]() |
Has protein modification | Y |
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
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試料調製
構成要素 | 名称: Catalytic core / タイプ: COMPLEX / Entity ID: all / 由来: MULTIPLE SOURCES |
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由来(天然) | 生物種: ![]() |
緩衝液 | pH: 7.9 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 凍結剤: ETHANE |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TITAN KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD |
撮影 | 電子線照射量: 62 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3次元再構成 | 解像度: 3.54 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 297526 / 対称性のタイプ: POINT |