title: Nucleotide sequence of cDNA clones of the murine myb proto-oncogene.
abstract: We have isolated cDNA clones of murine c-myb mRNA which contain approximately 2.8 kb of the 3.9-kb mRNA sequence. Nucleotide sequencing has shown that these clones extend both 5' and 3' to sequences homologous to the v-myb oncogenes of avian myeloblastosis virus and avian leukemia virus E26. The sequence contains an open reading frame of 1944 nucleotides, and could encode a protein which is both highly homologous, and of similar size (71 kd), to the chicken c-myb protein. Examination of the deduced amino acid sequence of the murine c-myb protein revealed the presence of a 3-fold tandem repeat of 52 residues near the N terminus of the protein, and has enabled prediction of some of the likely structural features of the protein. These include a high alpha-helix content, a basic region toward the N terminus of the protein and an overall globular configuration. The arrangement of genomic c-myb sequences, detected using the cDNA clones as probes, was compared with the reported structure of rearranged c-myb in certain tumour cells. This comparison suggested that the rearranged c-myb gene may encode a protein which, like the v-myb protein, lacks the N-terminal region of c-myb.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001354:Avian Leukosis Virus / Q000235:genetics; D009189:Avian Myeloblastosis Virus / Q000235:genetics; D001483:Base Sequence; D002645:Chickens; D003001:Cloning, Molecular; D004247:DNA / Q000032:analysis*; D004262:DNA Restriction Enzymes; D005814:Genes, Viral; D051379:Mice; D009693:Nucleic Acid Hybridization; D010957:Plasmids; D014176:Protein Biosynthesis; D011519:Proto-Oncogenes; D012333:RNA, Messenger / Q000235:genetics; D012190:Retroviridae / Q000235:genetics*; D012689:Sequence Homology, Nucleic Acid; D013045:Species Specificity
chemical_list: D012333:RNA, Messenger; D004247:DNA; D004262:DNA Restriction Enzymes