title: Identification of a virus-specified protein in the nucleus of vaccinia virus-infected cells.
abstract: A new protein has been detected in the nuclei of vaccinia virus-infected cells. This protein has an apparent mol. wt. of 28000 (VP28) on SDS--polyacrylamide gels and has been detected in Triton X-100-treated nuclei of infected BSC-40, L-929 and CVC cells. Within the infected cells, VP 28 was synthesized maximally at 1 to 2 h p.i. in the cytoplasm and accumulated in the nuclei at 4 to 5 h p.i. The appearance of VP28 was not affected by cytosine arabinoside (25 microgram/ml), an inhibitor of virus DNA synthesis, or rifampicin (100 microgram/ml), an inhibitor of vaccinia assembly, but was inhibited by irradiation of the infecting virions; thus classifying it as an early vaccinia virus gene product. Nuclear--cytoplasmic mixing experiments suggested that the nuclear location of VP28 was not an artefact of the cell fractionation techniques employed. VP28 did not appear to be phosphorylated.
mesh_terms: D000818:Animals; D002460:Cell Line; D002467:Cell Nucleus / Q000032:analysis*; D003561:Cytarabine / Q000494:pharmacology; D003593:Cytoplasm / Q000032:analysis; D051379:Mice; D010766:Phosphorylation; D012293:Rifampin / Q000494:pharmacology; D014616:Vaccinia virus / Q000378:metabolism*; D014764:Viral Proteins / Q000032:analysis* / Q000096:biosynthesis; D014771:Virion / Q000032:analysis
chemical_list: D014764:Viral Proteins; D003561:Cytarabine; D012293:Rifampin