Cloning of the cDNAs for the small subunits of bovine and human DNA polymerase {delta} and chromosomal location of the human gene (POLD2)
- Univ. of Miami School of Medicine, FL (United States); and others
cDNAs encoding the small subunit of bovine and human DNA polymerase {delta} have been cloned and sequenced. The predicted polypeptides, 50,885 and 51,289 Daltons, respectively, are 94% identical, similar to the catalytic subunits. The high degree of conservation of the polypeptides suggests an essential function for the small subunit in the heterodimeric core enzyme. Although the catalytic subunit of DNA polymerase 5 shares significant homology with those of the herpes virus family of DNA polymerases, the small subunit of mammalian DNA polymerase 6 is not homologous to the small subunit of either herpes simplex virus type 1 DNA polymerase (UL42 protein) or the Epstein-Barr virus DNA polymerase (BMRF1 protein). Searches of the protein databases failed to detect significant homology with any protein sequenced thus far. PCR analysis of DNA from a panel of human-hamster hybrid cell lines localized the gene (POLD2) for the small subunit of DNA polymerase 5 to human chromosome 7. 45 refs., 2 figs., 2 tabs.
- OSTI ID:
- 433299
- Journal Information:
- Genomics, Vol. 29, Issue 1; Other Information: PBD: 1 Sep 1995
- Country of Publication:
- United States
- Language:
- English
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