title: Hantavirus nucleocapsid protein interacts with the Fas-mediated apoptosis enhancer Daxx.
abstract: Hantaviruses cause two severe diseases, haemorrhagic fever with renal syndrome in Eurasia and hantavirus pulmonary syndrome in the Americas. To understand more about the molecular mechanisms that lead to these diseases, the associations of Puumala virus nucleocapsid protein (PUUV-N) with cellular proteins were studied by yeast two-hybrid screening. Daxx, known as an apoptosis enhancer, was identified from a HeLa cDNA library and its interaction with PUUV-N was confirmed by GST pull-down assay, co-immunoprecipitation and co-localization studies. Furthermore, domains of interaction were mapped to the carboxyl-terminal region of 142 amino acids in Daxx and the carboxyl-terminal 57 residues in PUUV-N, respectively. In pepscan assays, the binding sites of Daxx to PUUV-N were mapped further to two lysine-rich regions, of which one overlaps the sequence of the predicted nuclear localization signal of Daxx. These data suggest a direct link between host cell machinery and a hantavirus structural component.
authors.affiliation: Department of Virology1 and Department of Pathology2, Haartman Institute and HUCH Laboratory Diagnostics, and Institute of Biotechnology3, PO Box 21, Haartmaninkatu 3, FIN-00014 University of Helsinki, Finland.
authors.forename: Xiao-Dong
authors.initials: XD
authors.lastname: Li
authors.affiliation: Department of Virology1 and Department of Pathology2, Haartman Institute and HUCH Laboratory Diagnostics, and Institute of Biotechnology3, PO Box 21, Haartmaninkatu 3, FIN-00014 University of Helsinki, Finland.
authors.forename: Tomi P
authors.initials: TP
authors.lastname: Mäkelä
authors.affiliation: Department of Virology1 and Department of Pathology2, Haartman Institute and HUCH Laboratory Diagnostics, and Institute of Biotechnology3, PO Box 21, Haartmaninkatu 3, FIN-00014 University of Helsinki, Finland.
authors.forename: Deyin
authors.initials: D
authors.lastname: Guo
authors.affiliation: Department of Virology1 and Department of Pathology2, Haartman Institute and HUCH Laboratory Diagnostics, and Institute of Biotechnology3, PO Box 21, Haartmaninkatu 3, FIN-00014 University of Helsinki, Finland.
authors.forename: Rabah
authors.initials: R
authors.lastname: Soliymani
authors.affiliation: Department of Virology1 and Department of Pathology2, Haartman Institute and HUCH Laboratory Diagnostics, and Institute of Biotechnology3, PO Box 21, Haartmaninkatu 3, FIN-00014 University of Helsinki, Finland.
authors.forename: Vesa
authors.initials: V
authors.lastname: Koistinen
authors.affiliation: Department of Virology1 and Department of Pathology2, Haartman Institute and HUCH Laboratory Diagnostics, and Institute of Biotechnology3, PO Box 21, Haartmaninkatu 3, FIN-00014 University of Helsinki, Finland.
authors.forename: Olli
authors.initials: O
authors.lastname: Vapalahti
authors.affiliation: Department of Virology1 and Department of Pathology2, Haartman Institute and HUCH Laboratory Diagnostics, and Institute of Biotechnology3, PO Box 21, Haartmaninkatu 3, FIN-00014 University of Helsinki, Finland.
authors.forename: Antti
authors.initials: A
authors.lastname: Vaheri
authors.affiliation: Department of Virology1 and Department of Pathology2, Haartman Institute and HUCH Laboratory Diagnostics, and Institute of Biotechnology3, PO Box 21, Haartmaninkatu 3, FIN-00014 University of Helsinki, Finland.
authors.forename: Hilkka
authors.initials: H
authors.lastname: Lankinen
mesh_terms: D048868:Adaptor Proteins, Signal Transducing; D000595:Amino Acid Sequence; D017209:Apoptosis; D001665:Binding Sites; D002352:Carrier Proteins / Q000737:chemistry / Q000378:metabolism*; D056970:Co-Repressor Proteins; D006476:Orthohantavirus / Q000502:physiology*; D006367:HeLa Cells; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins; D018832:Molecular Chaperones; D008969:Molecular Sequence Data; D009687:Nuclear Proteins; D019251:Nucleocapsid / Q000378:metabolism*; D019590:Nucleocapsid Proteins; D020798:Two-Hybrid System Techniques; D019014:fas Receptor / Q000502:physiology*
chemical_list: D048868:Adaptor Proteins, Signal Transducing; D002352:Carrier Proteins; D056970:Co-Repressor Proteins; C106985:DAXX protein, human; D047908:Intracellular Signaling Peptides and Proteins; D018832:Molecular Chaperones; D009687:Nuclear Proteins; D019590:Nucleocapsid Proteins; D019014:fas Receptor; C100886:nucleocapsid protein, Puumala virus