NCIt definition : Human TWNK wild-type allele is located in the vicinity of 10q24.31 and is approximately
7 kb in length. This allele, which encodes twinkle mtDNA helicase protein, is involved
in unwinding of mitochondrial DNA to promote replication. Mutations in the gene are
associated with hepatocerebral-type mitochondrial DNA depletion syndrome 7, autosomal
dominant progressive external ophthalmoplegia with mitochondrial DNA deletions 3 and
Perrault syndrome 5.;