2023
Pot1b −/− tumors activate G-quadruplex-induced DNA damage to promote telomere hyper-elongation
Takasugi T, Gu P, Liang F, Staco I, Chang S. Pot1b −/− tumors activate G-quadruplex-induced DNA damage to promote telomere hyper-elongation. Nucleic Acids Research 2023, 51: 9227-9247. PMID: 37560909, PMCID: PMC10516629, DOI: 10.1093/nar/gkad648.Peer-Reviewed Original ResearchConceptsDNA damage responseDamage responseReplication protein A (RPA) complexDependent DNA damage responseTelomere length homeostasisTelomere maintenance mechanismLength homeostasisTelomerase recruitmentPOT1 proteinsHuman POT1Mouse genomeLength maintenanceFunction disruptsReplicative immortalityTelomeresPOT1 mutationsDNA damageHuman cancersLonger telomeresPOT1bMaintenance mechanismsSerial transplantationA complexesSimilar mechanismMutations
2021
Distinct functions of POT1 proteins contribute to the regulation of telomerase recruitment to telomeres
Gu P, Jia S, Takasugi T, Tesmer VM, Nandakumar J, Chen Y, Chang S. Distinct functions of POT1 proteins contribute to the regulation of telomerase recruitment to telomeres. Nature Communications 2021, 12: 5514. PMID: 34535663, PMCID: PMC8448735, DOI: 10.1038/s41467-021-25799-7.Peer-Reviewed Original ResearchConceptsDNA damage responseTelomerase recruitmentPOT1 proteinsDamage responseATR-dependent DNA damage responseNon-homologous end-joining DNA repair pathwayRecruitment of telomeraseC-strand fillAmino acidsDNA repair pathwaysUnique amino acidsTEN1 (CST) complexTelomere extensionCTC1-STN1Stable heterodimerRepair pathwaysC-terminusDistinct functionsPOT1bPOT1aTelomeresC-strandG-strandTPP1Protein
2006
Pot1 Deficiency Initiates DNA Damage Checkpoint Activation and Aberrant Homologous Recombination at Telomeres
Wu L, Multani AS, He H, Cosme-Blanco W, Deng Y, Deng JM, Bachilo O, Pathak S, Tahara H, Bailey SM, Deng Y, Behringer RR, Chang S. Pot1 Deficiency Initiates DNA Damage Checkpoint Activation and Aberrant Homologous Recombination at Telomeres. Cell 2006, 126: 49-62. PMID: 16839876, DOI: 10.1016/j.cell.2006.05.037.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCell Cycle ProteinsCells, CulturedCellular SenescenceChromosome AberrationsDNA DamageDNA RepairDNA-Binding ProteinsGene SilencingGenes, cdcGenomic InstabilityMiceMice, KnockoutNuclear ProteinsProtein IsoformsRecombination, GeneticSequence HomologyShelterin ComplexSister Chromatid ExchangeTelomereTelomere-Binding ProteinsConceptsAberrant homologous recombinationHomologous recombinationTelomere sister chromatid exchangeDNA damage checkpoint activationOverall genomic stabilityTelomere length regulationDNA damage machineryDNA damage responseT-loop structureChromosomal end protectionMammalian telomeresPOT1 proteinsTelomere integrityCheckpoint activationGenomic stabilityLength regulationMouse genomeDamage responseEnd protectionReplicative senescenceDNA breaksRich overhangTelomeresChromosomal instabilityConditional deletion