title: Induction of uracil-DNA glycosylase and dUTP nucleotidohydrolase activity in herpes simplex virus-infected human cells.
abstract: HeLa BU cells infected with either the type 1 or the type 2 forms of herpes simplex virus show an increase in the activities of uracil-DNA glycosylase and dUTP nucleotidohydrolase. Under optimal conditions, uracil-DNA glycosylase activity increases approximately 40-fold in HSV type 2-infected cells. In herpes simplex virus (HSV) type 1-infected cells, uracil-DNA glycosylase activity increases only 6-fold. At a KCl concentration of 100 mM, uracil-DNA glycosylase derived from HSV type 2-infected cells is activated 2-fold, while the glycosylase extracted from mock infected HeLa BU cells is inhibited almost 90% at 100 mM KCl. dUTP nucleotidohydrolase activity increases 4-fold and 3-fold, respectively, in HSV type 1- and HSV type 2-infected HeLa BU cells. Nondenaturing polyacrylamide gel electrophoresis of extracts derived from the type 1- and type 2-infected cells indicates distinct electrophoretic mobilities from the host cell enzyme. dUTP nucleotidohydrolase RF values for the mock infected cells, HSV type 1, and HSV type 2 are 0.5, 0.25, and 0.33, respectively. Serum from rabbits immunized against cells infected with herpes simplex virus type 1 or type 2 specifically neutralizes the dUTPase and uracil-DNA glycosylase activities extracted from herpes simplex virus-infected cells. This serum does not neutralize dUTPase or uracil-DNA glycosylase activity derived from mock infected cells.
mesh_terms: D002472:Cell Transformation, Viral; D045647:DNA Glycosylases; D004790:Enzyme Induction; D006367:HeLa Cells / Q000201:enzymology; D006801:Humans; D007700:Kinetics; D009699:N-Glycosyl Hydrolases / Q000096:biosynthesis* / Q000302:isolation & purification; D011755:Pyrophosphatases / Q000096:biosynthesis* / Q000302:isolation & purification; D018139:Simplexvirus / Q000235:genetics*; D051981:Uracil-DNA Glycosidase
chemical_list: D045647:DNA Glycosylases; D009699:N-Glycosyl Hydrolases; D051981:Uracil-DNA Glycosidase; D011755:Pyrophosphatases; C020020:dUTP pyrophosphatase