DNA Damage/Telomere Stress Induced Senescence / Sensing of DNA Double Strand Breaks / Pexophagy / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / telomeric DNA binding / signal transduction in response to DNA damage / negative regulation of TORC1 signaling / telomere maintenance / DNA damage checkpoint signaling / double-strand break repair ...DNA Damage/Telomere Stress Induced Senescence / Sensing of DNA Double Strand Breaks / Pexophagy / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / telomeric DNA binding / signal transduction in response to DNA damage / negative regulation of TORC1 signaling / telomere maintenance / DNA damage checkpoint signaling / double-strand break repair / chromatin organization / chromosome, telomeric region / non-specific serine/threonine protein kinase / protein kinase activity / リン酸化 / protein serine kinase activity / DNA修復 / protein serine/threonine kinase activity / DNA damage response / ミトコンドリア / ATP binding / 細胞核 類似検索 - 分子機能
Telomere-length maintenance and DNA damage repair / Serine/threonine-protein kinase ATM, plant / ATM, catalytic domain / Telomere-length maintenance and DNA damage repair / Telomere-length maintenance and DNA damage repair / FATC domain / FATC / FATC domain / PIK-related kinase / FAT domain profile. ...Telomere-length maintenance and DNA damage repair / Serine/threonine-protein kinase ATM, plant / ATM, catalytic domain / Telomere-length maintenance and DNA damage repair / Telomere-length maintenance and DNA damage repair / FATC domain / FATC / FATC domain / PIK-related kinase / FAT domain profile. / FATC domain profile. / Phosphatidylinositol 3- and 4-kinases signature 1. / Phosphatidylinositol 3/4-kinase, conserved site / Phosphatidylinositol 3- and 4-kinases signature 2. / Phosphatidylinositol 3-/4-kinase, catalytic domain superfamily / Phosphoinositide 3-kinase, catalytic domain / Phosphatidylinositol 3- and 4-kinase / Phosphatidylinositol 3- and 4-kinases catalytic domain profile. / Phosphatidylinositol 3-/4-kinase, catalytic domain / Protein kinase-like domain superfamily 類似検索 - ドメイン・相同性
ジャーナル: Structure / 年: 2020 タイトル: Cryo-EM Structure of Nucleotide-Bound Tel1 Unravels the Molecular Basis of Inhibition and Structural Rationale for Disease-Associated Mutations. 著者: Luke A Yates / Rhys M Williams / Sarem Hailemariam / Rafael Ayala / Peter Burgers / Xiaodong Zhang / 要旨: Yeast Tel1 and its highly conserved human ortholog ataxia-telangiectasia mutated (ATM) are large protein kinases central to the maintenance of genome integrity. Mutations in ATM are found in ataxia- ...Yeast Tel1 and its highly conserved human ortholog ataxia-telangiectasia mutated (ATM) are large protein kinases central to the maintenance of genome integrity. Mutations in ATM are found in ataxia-telangiectasia (A-T) patients and ATM is one of the most frequently mutated genes in many cancers. Using cryoelectron microscopy, we present the structure of Tel1 in a nucleotide-bound state. Our structure reveals molecular details of key residues surrounding the nucleotide binding site and provides a structural and molecular basis for its intrinsically low basal activity. We show that the catalytic residues are in a productive conformation for catalysis, but the phosphatidylinositol 3-kinase-related kinase (PIKK) regulatory domain insert restricts peptide substrate access and the N-lobe is in an open conformation, thus explaining the requirement for Tel1 activation. Structural comparisons with other PIKKs suggest a conserved and common allosteric activation mechanism. Our work also provides a structural rationale for many mutations found in A-T and cancer.