title: Genetic dissection of a putative nucleolar localization signal in the coat protein of ourmia melon virus.
abstract: Ourmiaviruses became the object of recent attention for their unusual taxonomic placements among plant viruses. The ourmia melon virus (OuMV) RNA3 encodes a 22-kDa coat protein (CP). Besides its role in virion formation, the OuMV CP facilitates systemic virus spread. In Nicotiana benthamiana, an eGFP-CP fusion protein was localized in the nucleus and preferentially in the nucleolus. By bioinformatics analysis, we identified an arginine- and lysine-rich region at the N-terminus of the CP. Here, we demonstrate by deletion and alanine scanning mutagenesis that this region in the CP is responsible for its preferential accumulation in the nucleolus of host cells.
authors.affiliation: Sez. di Torino, CNR, Istituto di Virologia Vegetale, Strada delle Cacce 73, 10135, Torino, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Rossi
authors.forename: A
authors.initials: A
authors.lastname: Genre
authors.forename: M
authors.initials: M
authors.lastname: Turina
mesh_terms: D000595:Amino Acid Sequence; D036022:Capsid Proteins / Q000235:genetics / Q000378:metabolism*; D002466:Cell Nucleolus / Q000502:physiology*; D015967:Gene Expression Regulation, Viral / Q000502:physiology*; D018515:Plant Leaves / Q000166:cytology / Q000821:virology; D010942:Plant Viruses / Q000235:genetics / Q000378:metabolism*; D021381:Protein Transport / Q000235:genetics / Q000502:physiology*; D014026:Nicotiana / Q000166:cytology
chemical_list: D036022:Capsid Proteins