Loss-of-function mutations in MGME1 impair mtDNA replication and cause multisystemic mitochondrial disease

Michal Minczuk, Wolfram Kunz and colleagues report that loss-of-function mutations in MGME1 impair mitochondrial DNA replication and cause a multisystemic mitochondrial disease. Their functional studies show that MGME1 encodes a RecB-type exonuclease that cleaves single-stranded DNA and processes DNA flap substrates.