title: pIRS1 and pTRS1 are present in human cytomegalovirus virions.
abstract: The virus-coded proteins pIRS1 and pTRS1 were found associated with purified human cytomegalovirus virions. The proteins were not degraded when intact virions were treated with trypsin, which suggests that they are localized inside the viral particle. In transfection experiments pIRS1 and pTRS1 modestly activated expression from a reporter plasmid containing the viral major immediate-early promoter but did not influence the activity of a reporter carrying the irs1/trs1 immediate-early promoter. Both reporters were activated by the combination of pIRS1 or pTRS1 and pUL69, which is also present in virions.
authors.affiliation: Department of Molecular Biology, Howard Hughes Medical Institute, Princeton University, New Jersey 08544-1014, USA.
authors.forename: M J
authors.initials: MJ
authors.lastname: Romanowski
authors.forename: E
authors.initials: E
authors.lastname: Garrido-Guerrero
authors.forename: T
authors.initials: T
authors.lastname: Shenk
mesh_terms: D003587:Cytomegalovirus / Q000235:genetics / Q000378:metabolism*; D003902:Detergents / Q000494:pharmacology; D006361:Heating; D006801:Humans; D017874:Immediate-Early Proteins / Q000235:genetics; D017830:Octoxynol / Q000494:pharmacology; D011401:Promoter Regions, Genetic; D014357:Trypsin / Q000378:metabolism; D014764:Viral Proteins / Q000235:genetics / Q000378:metabolism*; D014771:Virion
chemical_list: D003902:Detergents; D017874:Immediate-Early Proteins; C072216:TRS1 protein, Human herpesvirus 5; D014764:Viral Proteins; C051298:cytomegalovirus phosphoprotein 71kDa; D017830:Octoxynol; D014357:Trypsin