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
2019
Chromatin‐bound cGAS is an inhibitor of DNA repair and hence accelerates genome destabilization and cell death
Jiang H, Xue X, Panda S, Kawale A, Hooy RM, Liang F, Sohn J, Sung P, Gekara NO. Chromatin‐bound cGAS is an inhibitor of DNA repair and hence accelerates genome destabilization and cell death. The EMBO Journal 2019, 38: embj2019102718. PMID: 31544964, PMCID: PMC6826206, DOI: 10.15252/embj.2019102718.Peer-Reviewed Original ResearchConceptsCyclic GMP-AMP synthaseHomologous recombinationDNA repairGenome destabilizationCell deathChromatin-binding proteinsGMP-AMP synthaseSsDNA filamentsGenome integrityGenomic stressInnate immune sensorsHR repairChromosomal rearrangementsStrand invasionRegulatory mechanismsUnknown roleCytosolic innate immune sensorsCell survivalTemplate dsDNAImmune sensorsBone marrow cellsMicronuclei generationOutcome of infectionMarrow cellsInnate immune activationBinding of FANCI-FANCD2 Complex to RNA and R-Loops Stimulates Robust FANCD2 Monoubiquitination
Liang Z, Liang F, Teng Y, Chen X, Liu J, Longerich S, Rao T, Green AM, Collins NB, Xiong Y, Lan L, Sung P, Kupfer GM. Binding of FANCI-FANCD2 Complex to RNA and R-Loops Stimulates Robust FANCD2 Monoubiquitination. Cell Reports 2019, 26: 564-572.e5. PMID: 30650351, PMCID: PMC6350941, DOI: 10.1016/j.celrep.2018.12.084.Peer-Reviewed Original ResearchConceptsR-loopsCo-transcriptional R-loopsFANCI-FANCD2 complexFanconi anemiaR-loop structuresSeries of RNADNA replicative stressGuanine-rich sequencesFANCD2 monoubiquitinationGenomic lociID2 complexReplicative stressFA cellsRNA transcriptionFA pathwayComplex bindsDNA hybridsCancer predispositionBone marrow failureDNA damageRNAMonoubiquitinationDevelopmental abnormalitiesMarrow failureSsRNA