DNMT3A-CRY2/CIB1-TRF1 optogenetic telomere-targeting fusion construct system
Multi-Component SwitchThe DNMT3A-CRY2/CIB1-TRF1 system is a blue-light-responsive multi-component optogenetic construct that recruits human DNMT3A to telomeric regions through CRY2-CIB1 interaction and TRF1-mediated telomere binding. In the reported HeLa cell configuration, light activation selectively increased subtelomeric CpG methylation at six examined chromosome ends and was associated with progressive telomere lengthening over three cell generations.