Characterization of a fused protein specified by the adenovirus type 2-simian virus 40 hybrid Ad2+ND1 dp2

Fey, G., Lewis, J. B., Grodzicker, T., Bothwell, A. (April 1979) Characterization of a fused protein specified by the adenovirus type 2-simian virus 40 hybrid Ad2+ND1 dp2. J Virol, 30 (1). pp. 201-17. ISSN 0022-538X (Print)0022-538X (Linking)

URL: http://www.ncbi.nlm.nih.gov/pubmed/225516

Abstract

The adenovirus type 2-simian virus 40 (SV40) hybrid virus Ad2+ND1 dp2 (E. Lukanidin, manuscript in preparation) specified two proteins (molecular weights, 24,000 and 23,000) that are, in part, products of an insertion of SV40 early DNA sequences. This was demonstrated by translation in vitro from viral mRNA that had been selected by hybridization to SV40 DNA. These two phosphorylated, nonvirion proteins were produced late in infection in amounts similar to adenovirus 2 structural proteins and were closely related to each other in tryptic peptide composition. The portion of SV40 DNA (map units 0.17 to 0.22 on the SV40 genome) coding for these proteins was joined to sequences coding for the amino-terminal part of the adenovirus type 2 structural protein IV (fiber). The Ad2+ND1 dp2 23,000- and 24,000-molecular-weight proteins were hybrid polypeptides, with about two-thirds of their tryptic peptides contributed by the fiber protein and the remainder contributed by SV40 T-antigen. They shared with T-antigen (molecular weight, 96,000) a carboxy-terminal proline-rich tryptic peptide. Together, the tryptic peptide composition of these proteins and the known SV40 DNA sequences suggested the reading frame for the translation of T-antigen. The carboxy terminus for T-anigen would then be located on the SV40 genome map next to the TAA terminator triplet at position 0.175, 910 bases away from the cleavage site of the restriction endonuclease EcoRI. Seven host range mutants from Ad2+ND1 dp2 were isolated that had lost the capacity to propagate on monkey cells. They did not induce detectable levels of the hybrid proteins. Three of these mutants had lost the SV40 DNA insertion that codes in part for these proteins. Thus, in analogy to the Ad2+ND1 30,000-molecular-weight protein, the presence of these proteins correlates with the presence of the helper function for adenovirus replication on monkey cells.

Item Type: Paper
Uncontrolled Keywords: Adenoviruses, Human/analysis/*genetics Antigens, Viral/*genetics *Genes, Viral *Hybridization, Genetic Molecular Weight Peptides/analysis Simian virus 40/analysis/*genetics Viral Proteins/analysis/*genetics
Subjects: organism description > virus > adenovirus
organism description > virus > SV40
CSHL Authors:
Communities: CSHL labs
Depositing User: Matt Covey
Date: April 1979
Date Deposited: 02 Jun 2016 19:29
Last Modified: 02 Jun 2016 19:29
PMCID: PMC353314
Related URLs:
URI: http://repository.cshl.edu/id/eprint/32677

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