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Enhancement of deoxyguanosine kinase activity in human lung fibroblast cells infected with human cytomegalovirus

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Summary

Studies were conducted to establish the relationship between deoxyguanosine kinase activity and human cytomegalovirus (HCMV) infection. Using both PAGE and isoelectric focusing techniques, extracts from untreated and infected cells were examined for deoxyguanosine kinase activity. The analyses resulted in identical migration rates for deoxyguanosine kinase activity in both infected and uninfected extracts. These data and kinetic studies based on apparent Km values suggest that HCMV enhanced a cellular kinase activity rather than coded for a virus specific enzyme. Furthermore, our results indicated that infected cells, like normal fibroblasts, contain two deoxyguanosine kinase activities, one of mitochondrial and another of cytosolic origin. Of particular interest was the observation that HCMV infection caused an enhancement of the mitochondrial enzymatic activity while the cytosolic activity showed no change. Deoxycytidine kinase activity which is associated with cytosolic deoxyguanosine kinase was unaffected by HCMV infection.

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Authors and Affiliations

  1. Departments of Biochemistry and Microbiology, University of Nevada, 89557, Reno, Nevada, USA

    Roger A. Lewis, Linda Watkins & Stephen St. Jeor

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  1. Roger A. Lewis
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  2. Linda Watkins
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  3. Stephen St. Jeor
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Lewis, R.A., Watkins, L. & St. Jeor, S. Enhancement of deoxyguanosine kinase activity in human lung fibroblast cells infected with human cytomegalovirus. Mol Cell Biochem 65, 67–71 (1984). https://doi.org/10.1007/BF00226020

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  • DOI: https://doi.org/10.1007/BF00226020

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