Back to Search
Start Over
Biosynthesis, Immunological Specificity, and Intracellular Distribution of the Simian Virus 40-Specific Protein Induced by the Nondefective Hybrid Ad2 + ND 1
- Source :
- Journal of Virology. 26:411-419
- Publication Year :
- 1978
- Publisher :
- American Society for Microbiology, 1978.
-
Abstract
- Ad2 + ND 1 , a nondefective hybrid virus containing a segment of the early region of simian virus 40 (SV40) DNA covalently inserted into the human adenovirus 2 genome, enhances the growth of human adenoviruses in simian cells and induces the SV40 U antigen. This hybrid previously has been shown to code for a 28,000 (28K) molecular weight protein not present in wild-type adenovirus 2-infected cells. By radioimmunoprecipitation using sera from hamsters bearing SV40-specific tumors, we have established that the Ad2 + ND 1 -induced 28K protein is SV40-specific. This Ad2 + ND 1 -induced protein is synthesized as a 30K molecular weight precursor, which is detectable only when infected cells are pulse-labeled in the presence of the protease inhibitor tosylamino phenylethyl chloromethyl ketone. Upon fractionation of labeled cell extracts, about 80% of the 28K protein is found in the plasma membrane fraction, whereas the remaining 20% is associated with the outer nuclear membrane. This protein is not detectable either in the nucleus or in the cytoplasm. Blockage of proteolytic cleavage by tosylamino phenylethyl chloromethyl ketone did not alter the topographic distribution of this SV40-specific protein, although the amount of the precursor protein in the outer nuclear membrane increased fourfold while that in the plasma membrane was proportionately decreased. This result suggests that the 28K protein is transferred from the outer nuclear membrane to the plasma membrane after posttranslational cleavage of the 30K precursor polypeptide. These data offer further support to the proposal that the 28K protein contains the determinants for SV40 U antigen and is responsible for SV40 enhancement of adenovirus growth in simian cells.
- Subjects :
- Vesicle-associated membrane protein 8
Nuclear Envelope
viruses
Immunology
Cell
Simian virus 40
Biology
Microbiology
Virus
Cell Line
Cell membrane
Viral Proteins
chemistry.chemical_compound
Biosynthesis
Virology
Animal Viruses
medicine
Protein Precursors
Antigens, Viral
Adenoviruses, Human
Tosylphenylalanyl Chloromethyl Ketone
Cell Membrane
Molecular biology
medicine.anatomical_structure
chemistry
Biochemistry
Cytoplasm
Cell culture
Insect Science
Intracellular
Subjects
Details
- ISSN :
- 10985514 and 0022538X
- Volume :
- 26
- Database :
- OpenAIRE
- Journal :
- Journal of Virology
- Accession number :
- edsair.doi.dedup.....be71492189807cb4d06fbd680022d52b
- Full Text :
- https://doi.org/10.1128/jvi.26.2.411-419.1978