title: The Minute Virus of Mice NS2 proteins are not essential for productive infection of embryonic murine cells in utero.
abstract: The P4 promoter of the autonomous parvovirus Minute Virus of Mice (MVM) drives the production of its non-structural proteins, NS1 and NS2. The NS2 isoforms are without enzymatic activity but interact with cellular proteins. While NS2 is crucial to the viral life cycle in cultured murine cells, NS2-null mutant virus productively infects transformed host cells of other species. In the mouse, sensitivity to MVM infection is age dependent, exhibiting limited subclinical infections in adults, but sustained and potentially lethal infection in embryos. We therefore questioned whether the species-dependent requirement for NS2 function in vitro would be retained in utero. We report here that it is not. NS2-null mutant MVMp is capable of mounting a productive, albeit much reduced, infection of normal embryonic mouse cells in vivo. Based on the data, we hypothesize that NS2 may bear an as-yet undescribed immunosuppressive function.
authors.affiliation: Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben Gurion University of the Negev, Beer Sheva, Israel.
authors.forename: Saar
authors.initials: S
authors.lastname: Tal
authors.affiliation: Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben Gurion University of the Negev, Beer Sheva, Israel.
authors.forename: Michal
authors.initials: M
authors.lastname: Mincberg
authors.affiliation: Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben Gurion University of the Negev, Beer Sheva, Israel.
authors.forename: Irina
authors.initials: I
authors.lastname: Rostovsky
authors.affiliation: Division ofTumor Virology, Deutsches Krebsforschungszentrum, Heidelberg, Germany.
authors.forename: Jean
authors.initials: J
authors.lastname: Rommelaere
authors.affiliation: Division ofTumor Virology, Deutsches Krebsforschungszentrum, Heidelberg, Germany.
authors.forename: Nathali
authors.initials: N
authors.lastname: Salome
authors.affiliation: Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben Gurion University of the Negev, Beer Sheva, Israel.
authors.forename: Claytus
authors.initials: C
authors.lastname: Davis
mesh_terms: D000818:Animals; D002460:Cell Line; D004622:Embryo, Mammalian / Q000821:virology*; D005260:Female; D017353:Gene Deletion; D015967:Gene Expression Regulation, Viral / Q000502:physiology*; D006801:Humans; D051379:Mice; D008915:Minute Virus of Mice / Q000235:genetics / Q000502:physiology*; D010322:Parvoviridae Infections / Q000821:virology*; D011247:Pregnancy; D017361:Viral Nonstructural Proteins / Q000235:genetics / Q000378:metabolism*; D014779:Virus Replication
chemical_list: C505067:NS2 protein, minute virus of mice; D017361:Viral Nonstructural Proteins
keywords: Congenital infection; Minute Virus of Mice; NS2; Parvovirus; Viral gene function; Virus – host cell interaction