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Pre early adenovirus 5 gene product regulates synthesis of early viral messenger rna



Pre early adenovirus 5 gene product regulates synthesis of early viral messenger rna



Cell 17(4): 935-944



The expression of many early adenovirus mRNA is dependent upon the activity of a pre-early viral product. This viral gene product is defective in adenovirus 5 host range (Ad hr) group I mutants. Adenovirus 5 host range mutants were previously isolated by their ability to replicate in the adenovirus 5-transformed human embryonic cell line 293 and by their inability to replicate efficiently in [human cervical carcinoma] HeLa cells. The group I complementation class of host range mutants was mapped by marker rescue between 0-4.4 units. The S1 nuclease gel technique was used to examine the expression of early mRNA after infection of HeLa cells with Ad5 hr group I and II mutants. The Ad5 hr group II mutants stimulate the synthesis of a wild-type pattern of early mRNA. Infection of HeLa cells with Ad5 hr group I mutants gives rise to only 2 early mRNA. These mRNA map from 1.5-4.4 units, or in the same region as the Ad5 hr group I mutations. Since infection of HeLa cells with Ad5 hr group I mutants was defective for synthesis of cytoplasmic mRNA complementary to 3 early regions in the right half of the genome and to the early region 4.5-11.0 units, nuclear RNA from these cells were also analyzed by the S1 nuclease gel technique for the presence of precursor RNA chains. Nuclear precursors were not detected in Ad5 hr group I-infected HeLa cells, suggesting that the gene product defective in these mutants is required for synthesis of stable nuclear RNA from the three early regions in the right half of the genome and from the early region 4.5-11.0 units.

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Accession: 006160129

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PMID: 487437


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