There was no detectable increase in tRNA nucleotidyltransferase activity upon infection of Escherichia coli A19 with bacteriophage T4. Three mutant strains which contained low levels of tRNA nucleotidyltransferase activity also showed no increase in activity after infection. tRNA nucleotidyltransferase was purified from both uninfected and T4-infected cells and examined for possible modification. It was found that enzyme purified from both types of cells eluted from DEAE cellulose at the same specific conductivity. In addition, the molecular weight of tRNA nucleotidyltransferase purified from both uninfected and T4-infected cells was approximately 45,000 daltons as determined by chromatography on Sephadex G-100. These results suggest that T4-infection does not lead to synthesis of a new virus-specific tRNA nucleotidyltransferase nor does it cause modification of the host enzyme.
|Original language||English (US)|
|Number of pages||11|
|Journal||Biochemical and biophysical research communications|
|State||Published - Sep 5 1973|
ASJC Scopus subject areas
- Molecular Biology
- Cell Biology