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. 1976 Aug;3(8):2155–2167. doi: 10.1093/nar/3.8.2155

Properties of DNA ligase from uninfected and virus-infected HeLa cells.

S Spadari
PMCID: PMC343069  PMID: 9621

Abstract

HeLa cells contain a high M.W. form of DNA ligase which can be completely converted to a low M.W. form. Stokes radius, frictional ratio, sedimentation coefficient, molecular weight, pH dependence, and heat inactivation rate of the two forms have been studied. The major properties of the two forms of DNA ligase in HeLa cells (in particular molecular weights and pH dependence) resemble those of the "dimer" and "monomer" structures described in cultured human cells (Pedrali, G., Spadari, S., Ciarrocchi, G., Pedrini, M., Falaschi, A. (1973) Eur. J. Biochem., 39 343) .In synchronized HeLa cells, the DNA ligase shows a two fold increase during S phase and parallels the increase in the DNA synthesis rate. DNA ligase increases in parallel with viral DNA synthesis after infection of HeLa cells with vaccinia and Herpes virus but its cofactor requirements and physical properties (including the dimer leads to monomer conversion) are unchanged, suggesting that the newly formed ligase is not virus-coded.

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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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