Mutations in the spacer region of Drosophila mitochondrial DNA polymerase affect DNA binding, processivity, and the balance between Pol and Exo function.

Abstract excerpt

The catalytic subunit (alpha) of mitochondrial DNA polymerase (pol gamma) shares conserved DNA polymerase and 3'-5' exonuclease active site motifs with Escherichia coli DNA polymerase I and bacteriophage T7 DNA polymerase. A major difference between the prokaryotic and mitochondrial proteins is the size and sequence of the region between the exonuclease and DNA polymerase domains, referred to as the spacer in pol...

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