DNA Polymerase γ (D1Y6R) Rabbit mAb #13609

DNA polymerase γ (POLG, pol gamma) is a nuclear encoded protein that is responsible for mitochondrial genome replication in eukaryotic cells. The 140 kDa polymerase γ catalytic subunit forms a holoenzyme complex with a 55 kDa accessory protein (POLG2, pol γB) dimer, which confers processivity (1). In addition to polymerase activity, polymerase γ contains 3'-5' exonuclease activity for proofreading and 5′-deoxyribonucleic phosphate lyase activity that functions in DNA base excision repair (BER). The rate at which the catalytic subunit recognizes damaged DNA during DNA repair is enhanced by the pol γB accessory subunit (2). Mutations in the corresponding POLG gene are associated with several inherited neuropathies including progressive external ophthalmoplegia, myocerebrohepatopathy spectrum disorders and Alpers-Huttenlocher syndrome (3,4). Research studies indicate that mutations in the corresponding POLG gene may promote breast tumorigenesis (5).