Mechanism of the arginine requirement for adenovirus synthesis. I. Synthesis of structural proteins
- PMID: 5002382
- PMCID: PMC376255
- DOI: 10.1128/JVI.8.5.742-753.1971
Mechanism of the arginine requirement for adenovirus synthesis. I. Synthesis of structural proteins
Abstract
The mechanism of the arginine requirement for adenovirus was studied in cultures of KB cells infected with adenovirus type 2. Macromolecular synthesis was found to be severely impaired in uninfected cells under complete arginine deprivation, whereas an arginine concentration of 50 mum yielded a moderate and reversible inhibition of growth and nucleic acid synthesis. At this concentration, viral structural proteins were accumulated in excess although the virus yield was reduced more than 1,000-fold. The arginine-sensitive step appeared to occur early during the first 15 hr postinfection in the virus growth cycle. Virus-infected cells deprived of arginine to 50 mum showed, when reversed, a 4- to 5-hr lag period before the increase in virus growth was observed. Analysis of the radioactive pattern of labeled virions synthesized after reversion showed that all polypeptides were synthesized after addition of arginine to the medium, and none of the virion-polypeptides which are revealed by gel electrophoresis appeared to be preferentially synthesized after arginine reversion. The excess pool of structural proteins formed during depletion appeared to a large extent to be unavailable for virus assembly.
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