title: Complementary DNA cloning and expression of the papaya ringspot potyvirus sequences encoding capsid protein and a nuclear inclusion-like protein in Escherichia coli.
abstract: Three cDNA clones that express viral gene products in Escherichia coli JM83 were derived from a watermelon mosaic virus-1 strain of papaya ringspot virus (PRSV-W). DNAs complementary to portions of the viral RNA were inserted into the pUC8 and pUC9 plasmids, and the expressed polypeptides were fusion products with the amino terminus of beta-galactosidase. Clones W1-77 and W2-1 expressed fusion products with apparent molecular weights of 40,000 (40K) and 14K, respectively, which were serologically related to PRSV capsid protein. A 52K product serologically related to a 54K nuclear inclusion protein of tobacco etch virus was produced by clone W1-18. The sequences encoding the capsid and 57K nuclear inclusion-like proteins of PRSV were physically mapped to adjacent positions through Southern blot analyses of clones W1-77 and W1-18.
mesh_terms: D002213:Capsid / Q000235:genetics*; D003001:Cloning, Molecular; D004247:DNA / Q000378:metabolism*; D004262:DNA Restriction Enzymes; D004926:Escherichia coli / Q000235:genetics*; D005638:Fruit; D008970:Molecular Weight; D009029:Mosaic Viruses / Q000235:genetics*; D009693:Nucleic Acid Hybridization; D010957:Plasmids
chemical_list: D004247:DNA; D004262:DNA Restriction Enzymes