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Misregulation of mitochondrial 6mA promotes the propagation of mutant mtDNA and causes aging in C. elegans
Hahn et al. report the presence of 6mA, a DNA modification, on the mitochondrial (mt)DNA of various animal and plant species. Modulating the activity of 6mA enzymatic modifiers implicates 6mA in regulating mtDNA replication and expression and the transmission of mtDNA mutations across generations, ultimately affecting mitochondrial health and organismal lifespan.