- EMDB-51329: Structure of the A467T mutant of human mitochondrial DNA polymera... -
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基本情報
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データベース: EMDB / ID: EMD-51329
タイトル
Structure of the A467T mutant of human mitochondrial DNA polymerase gamma
マップデータ
試料
複合体: Structure of the A467T mutant of human mitochondrial DNA polymerase gamma
タンパク質・ペプチド: DNA polymerase subunit gamma-1
タンパク質・ペプチド: DNA polymerase subunit gamma-2
DNA: DNA (primer strand)
DNA: DNA (template strand)
リガンド: CALCIUM ION
リガンド: 2'-DEOXYCYTIDINE-5'-TRIPHOSPHATE
キーワード
Mitochondrial DNA polymerase / activator / TRANSFERASE/DNA / TRANSFERASE-DNA complex
機能・相同性
機能・相同性情報
gamma DNA polymerase complex / mitochondrial chromosome / mitochondrial DNA replication / Strand-asynchronous mitochondrial DNA replication / positive regulation of DNA-directed DNA polymerase activity / DNA replication proofreading / single-stranded DNA 3'-5' DNA exonuclease activity / 加水分解酵素; エステル加水分解酵素; 5'-リン酸モノエステル産生エンドデオキシリボヌクレアーゼ / DNA metabolic process / DNA polymerase processivity factor activity ...gamma DNA polymerase complex / mitochondrial chromosome / mitochondrial DNA replication / Strand-asynchronous mitochondrial DNA replication / positive regulation of DNA-directed DNA polymerase activity / DNA replication proofreading / single-stranded DNA 3'-5' DNA exonuclease activity / 加水分解酵素; エステル加水分解酵素; 5'-リン酸モノエステル産生エンドデオキシリボヌクレアーゼ / DNA metabolic process / DNA polymerase processivity factor activity / mitochondrial nucleoid / 付加脱離酵素(リアーゼ); 炭素-酸素リアーゼ類; その他の炭素-酸素リアーゼ / 5'-deoxyribose-5-phosphate lyase activity / base-excision repair, gap-filling / DNA polymerase binding / 3'-5' exonuclease activity / Transcriptional activation of mitochondrial biogenesis / base-excision repair / DNA-templated DNA replication / protease binding / double-stranded DNA binding / in utero embryonic development / DNA-directed DNA polymerase / DNA-directed DNA polymerase activity / mitochondrial matrix / intracellular membrane-bounded organelle / chromatin binding / protein-containing complex / mitochondrion / DNA binding / identical protein binding / cytoplasm 類似検索 - 分子機能
DNA-directed DNA-polymerase, family A, mitochondria / DNA mitochondrial polymerase, exonuclease domain / POLG2, C-terminal / : / DNA mitochondrial polymerase exonuclease domain / Glycyl-tRNA synthetase/DNA polymerase subunit gamma-2 / Anticodon-binding / Anticodon binding domain / Anticodon-binding domain superfamily / DNA-directed DNA polymerase, family A, conserved site ...DNA-directed DNA-polymerase, family A, mitochondria / DNA mitochondrial polymerase, exonuclease domain / POLG2, C-terminal / : / DNA mitochondrial polymerase exonuclease domain / Glycyl-tRNA synthetase/DNA polymerase subunit gamma-2 / Anticodon-binding / Anticodon binding domain / Anticodon-binding domain superfamily / DNA-directed DNA polymerase, family A, conserved site / DNA polymerase family A signature. / DNA-directed DNA polymerase, family A, palm domain / DNA polymerase A domain / Class II Aminoacyl-tRNA synthetase/Biotinyl protein ligase (BPL) and lipoyl protein ligase (LPL) / Ribonuclease H-like superfamily / DNA/RNA polymerase superfamily 類似検索 - ドメイン・相同性
DNA polymerase subunit gamma-1 / DNA polymerase subunit gamma-2 類似検索 - 構成要素
ジャーナル: Nature / 年: 2025 タイトル: Small molecules restore mutant mitochondrial DNA polymerase activity. 著者: Sebastian Valenzuela / Xuefeng Zhu / Bertil Macao / Mattias Stamgren / Carol Geukens / Paul S Charifson / Gunther Kern / Emily Hoberg / Louise Jenninger / Anja V Gruszczyk / Seoeun Lee / ...著者: Sebastian Valenzuela / Xuefeng Zhu / Bertil Macao / Mattias Stamgren / Carol Geukens / Paul S Charifson / Gunther Kern / Emily Hoberg / Louise Jenninger / Anja V Gruszczyk / Seoeun Lee / Katarina A S Johansson / Javier Miralles Fusté / Yonghong Shi / S Jordan Kerns / Laleh Arabanian / Gabriel Martinez Botella / Sofie Ekström / Jeremy Green / Andrew M Griffin / Carlos Pardo-Hernández / Thomas A Keating / Barbara Küppers-Munther / Nils-Göran Larsson / Cindy Phan / Viktor Posse / Juli E Jones / Xie Xie / Simon Giroux / Claes M Gustafsson / Maria Falkenberg / 要旨: Mammalian mitochondrial DNA (mtDNA) is replicated by DNA polymerase γ (POLγ), a heterotrimeric complex consisting of a catalytic POLγA subunit and two accessory POLγB subunits. More than 300 ...Mammalian mitochondrial DNA (mtDNA) is replicated by DNA polymerase γ (POLγ), a heterotrimeric complex consisting of a catalytic POLγA subunit and two accessory POLγB subunits. More than 300 mutations in POLG, the gene encoding the catalytic subunit, have been linked to severe, progressive conditions with high rates of morbidity and mortality, for which no treatment exists. Here we report on the discovery and characterization of PZL-A, a first-in-class small-molecule activator of mtDNA synthesis that is capable of restoring function to the most common mutant variants of POLγ. PZL-A binds to an allosteric site at the interface between the catalytic POLγA subunit and the proximal POLγB subunit, a region that is unaffected by nearly all disease-causing mutations. The compound restores wild-type-like activity to mutant forms of POLγ in vitro and activates mtDNA synthesis in cells from paediatric patients with lethal POLG disease, thereby enhancing biogenesis of the oxidative phosphorylation machinery and cellular respiration. Our work demonstrates that a small molecule can restore function to mutant DNA polymerases, offering a promising avenue for treating POLG disorders and other severe conditions linked to depletion of mtDNA.