Anti-DNA Polymeraseδ [Clone 6196]

Recombinant protein corresponding to aa 1-140 of the large subunit of human DNA polymerase delta

PBS, pH 7.2.

Liquid

Purified by Protein G affinity chromatography

This product is stable for at least one (1) year if stored at -20°C. Store product in appropriate aliquots to avoid multiple freeze-thaw cycles.

Research Use Only

Next Day 2-8°C

This antibody recognizes human DNA polymerase delta.

DNA polymerase delta is an essential enzyme in eukaryotes having a major role in genome maintenance through its involvement in replicative DNA synthesis and multiple synthetic repair processes. In addition to its 5′→3′ DNA-directed polymerase activity, DNA polymerase delta possesses 3′→5′ exonuclease activity that imparts the ability to remove newly added noncomplementary nucleotides during replication.

As the catalytic component of the trimeric (Pol-delta3 complex) and tetrameric DNA polymerase delta complexes (Pol-delta4 complex), plays a crucial role in high fidelity genome replication, including in lagging strand synthesis, and repair. Exhibits both DNA polymerase and 3'- to 5'-exonuclease activities (PubMed:16510448, PubMed:19074196, PubMed:20334433, PubMed:24035200, PubMed:24022480). Requires the presence of accessory proteins POLD2, POLD3 and POLD4 for full activity. Depending upon the absence (Pol-delta3) or the presence of POLD4 (Pol-delta4), displays differences in catalytic activity. Most notably, expresses higher proofreading activity in the context of Pol-delta3 compared with that of Pol-delta4 (PubMed:19074196, PubMed:20334433). Although both Pol-delta3 and Pol-delta4 process Okazaki fragments in vitro, Pol-delta3 may be better suited to fulfill this task, exhibiting near-absence of strand displacement activity compared to Pol-delta4 and stalling on encounter with the 5'-blocking oligonucleotides. Pol-delta3 idling process may avoid the formation of a gap, while maintaining a nick that can be readily ligated (PubMed:24035200). Along with DNA polymerase kappa, DNA polymerase delta carries out approximately half of nucleotide excision repair (NER) synthesis following UV irradiation (PubMed:20227374). Under conditions of DNA replication stress, in the presence of POLD3 and POLD4, may catalyze the repair of broken replication forks through break-induced replication (BIR) (PubMed:24310611). Involved in the translesion synthesis (TLS) of templates carrying O6-methylguanine, 8oxoG or abasic sites (PubMed:19074196, PubMed:24191025). {PubMed:16510448, PubMed:19074196, PubMed:20227374, PubMed:20334433, PubMed:24022480, PubMed:24035200, PubMed:24191025, PubMed:24310611}.