title: Subcellular localization of proteins encoded by oncogenes of avian myeloblastosis virus and avian leukemia virus E26 and by chicken c-myb gene.
abstract: Analysis of the subcellular location of the proteins encoded by the oncogenes of avian myeloblastosis virus and avian leukemia virus E26 ( p45v -myb and p135gag -myb-ets, respectively) and by the chicken c-myb gene ( p75c -myb) shows that all three proteins are located in the nucleus. In AMV-infected (but not transformed) chicken fibroblasts p45v -myb also resides in the nucleus, indicating that a nuclear location of p45v -myb in these cells is not sufficient to achieve transformation. In AMV-transformed myeloblasts a small fraction of p45v -myb occupies an additional site in the perinuclear region of the cytoplasm. If the myeloblasts are caused to differentiate to macrophages, most of p45v -myb is found in the cytoplasm. This redistribution of p45v -myb within the cell may be responsible for reversion of the transformed phenotype.
mesh_terms: D000818:Animals; D001354:Avian Leukosis Virus / Q000235:genetics*; D009189:Avian Myeloblastosis Virus / Q000235:genetics*; D001853:Bone Marrow / Q000502:physiology; D002467:Cell Nucleus / Q000378:metabolism; D002471:Cell Transformation, Neoplastic; D002645:Chickens; D005347:Fibroblasts / Q000378:metabolism; D005455:Fluorescent Antibody Technique; D005796:Genes; D005814:Genes, Viral; D009363:Neoplasm Proteins / Q000235:genetics*; D009857:Oncogenes; D014764:Viral Proteins / Q000235:genetics*
chemical_list: D009363:Neoplasm Proteins; D014764:Viral Proteins