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. 1984 Dec;81(24):7777–7781. doi: 10.1073/pnas.81.24.7777

Identification of a higher molecular weight DNA polymerase alpha catalytic polypeptide in monkey cells by monoclonal antibody.

E Karawya, J Swack, W Albert, J Fedorko, J D Minna, S H Wilson
PMCID: PMC392235  PMID: 6393127

Abstract

A monoclonal antibody against purified calf DNA polymerase alpha (deoxynucleosidetriphosphate:DNA deoxynucleotidyltransferase, EC 2.7.7.7) was used to immunoprecipitate proteins from a crude soluble extract of growing monkey BSC-1 cells. Immunoprecipitates contained familiar DNA polymerase alpha catalytic polypeptides of Mrs approximately equal to 115,000 and 70,000 and also a Mr 40,000 catalytic polypeptide; the major component in the immunoprecipitates, however, was a polypeptide of Mr approximately equal to 190,000 not previously identified as a DNA polymerase. This protein was capable of DNA polymerase activity after electroelution from NaDodSO4/polyacrylamide gels and renaturation. The highly purified enzyme so obtained was active with poly(dT).oligo(rA) as template.primer, resistant to dideoxy TTP (ddTTP), and inhibited by aphidicolin and butylphenyldeoxyguanosine 5'-triphosphate, thus identifying it as a DNA polymerase alpha. The results indicate that a polypeptide of Mr approximately equal to 190,000 is an abundant component among DNA polymerase alpha catalytic polypeptides in growing monkey cells.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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