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貨期:
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用途:
For Research Use Only. Not for use in diagnostic or therapeutic procedures.
Accessory component of both the DNA polymerase delta complex and the DNA polymerase zeta complex. As a component of the trimeric and tetrameric DNA polymerase delta complexes (Pol-delta3 and Pol-delta4, respectively), plays a role in high fidelity genome replication, including in lagging strand synthesis, and repair. Pol-delta3 and Pol-delta4 are characterized by the absence or the presence of POLD4. They exhibit differences in catalytic activity. Most notably, Pol-delta3 shows higher proofreading activity than Pol-delta4. Although both Pol-delta3 and Pol-delta4 process Okazaki fragments in vitro, Pol-delta3 may also 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. Along with DNA polymerase kappa, DNA polymerase delta carries out approximately half of nucleotide excision repair (NER) synthesis following UV irradiation. Under conditions of DNA replication stress, required for the repair of broken replication forks through break-induced replication (BIR). Involved in the translesion synthesis (TLS) of templates carrying O6-methylguanine or abasic sites performed by Pol-delta4, independently of DNA polymerase zeta (REV3L) or eta (POLH). Facilitates abasic site bypass by DNA polymerase delta by promoting extension from the nucleotide inserted opposite the lesion. Also involved in TLS as a component of the DNA polymerase zeta complex. Along with POLD3, dramatically increases the efficiency and processivity of DNA synthesis of the DNA polymerase zeta complex compared to the minimal zeta complex, consisting of only REV3L and REV7.
基因功能參考文獻:
The results show that the FF483-484 amino acids in the human Poleta (designated F1 motif) are necessary for the interaction of this polymerase with POLD2, the B subunit of the replicative DNA polymerase delta, both in vitro and in vivo. PMID: 25662213
DNA polymerase delta catalytic subunit p125 induced by mutant type p53 is associated with hepatocellular carcinoma invasion. PMID: 21372597
Results suggest that POLD2 and KSP37 might be potential prognostic biomarkers. PMID: 21079801
The association of PDIP38 with pol delta was shown to occur in calf thymus tissue and mammalian cell extracts by GST-PDIP38 pull-down and coimmunoprecipitation experiments. PMID: 12522211
As a first step towards understanding the functional importance of their regulatory subunit interactions, the three-dimensional structure of the p50-p66 heterodimer of human Pol delta has been solved using X-ray crystallography. PMID: 18765914
the crystal structure of p50*p66(N) complex featuring oligonucleotide binding and phosphodiesterase domains in p50 PMID: 18818516