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The metabolism of host RNAs in cells infected by an adenovirus E4 mutant.

Abstract：

:Mutants of adenovirus type 5 (Ad5) that lack early region 4 (E4) are defective in the expression of viral late genes. E4 mutants exhibit dramatically reduced levels of both cytoplasmic and nuclear viral late RNAs compared to wild-type virus, due principally to reduced stability of unprocessed viral late RNA in the nucleus of mutant-infected cells. To determine whether E4 products also affect the metabolism of host RNAs in infected cells, steady-state levels of beta-actin RNA and triose phosphate isomerase (TPI) RNA were measured in the cytoplasms and nuclei of HeLa cells infected by either wild-type Ad5 or the E4 deletion mutant H5dl1004, and were compared to levels in uninfected HeLa cells. S1 nuclease analyses revealed only slight reductions in beta-actin mRNA levels in the cytoplasm and in levels of spliced and unspliced beta-actin RNA in the nucleus of cells infected by either Ad5 or H5dl1004. RNase protection analyses showed that cytoplasmic TPI RNA levels were not affected by infection of HeLa cells with either Ad5 or H5dl1004. Steady-state levels of nuclear TPI RNA, both spliced and unspliced, were slightly reduced in cells infected by wild-type virus but not in HeLa cells infected by H5dl1004. These results indicate that the reduced stability of RNA in HeLa cells infected by E4 mutants is a virus-specific phenotype which does not extend to host cell RNAs.

journal_name

Virology

journal_title

Virology

authors

Sandler AB,Ketner G

doi

10.1016/0042-6822(91)90498-z

subject

Has Abstract

pub_date

1991-03-01 00:00:00

pages

319-26

issue

1

eissn

0042-6822

issn

1096-0341

journal_volume

181

pub_type

杂志文章

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