title: Drosophila and vertebrate myb proteins share two conserved regions, one of which functions as a DNA-binding domain.
abstract: We report the nucleotide sequence of a cDNA clone of the Drosophila melanogaster homologue of c-myb, a member of the class of vertebrate transforming genes encoding nuclear proteins. We predict the mol. wt of the Drosophila myb (D-myb) protein to be 74,000. The D-myb protein contains two clusters of sequences homologous to vertebrate myb proteins, surrounded by sequences lacking homology. These results extend previous evidence for the existence of a D. melanogaster homologue of c-myb and identify two highly conserved and therefore presumably functionally important domains of c-myb proteins. DNA-binding experiments indicate that the NH2-proximal of the two homology regions functions as a DNA-binding domain. Based on the absence of the COOH-proximal homology region in truncated oncogenic derivatives of c-myb it is likely that this homology region encodes a function whose loss is involved in activating the oncogenic potential of c-myb.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D004247:DNA / Q000032:analysis; D004268:DNA-Binding Proteins / Q000235:genetics*; D004331:Drosophila melanogaster / Q000235:genetics*; D005796:Genes; D008969:Molecular Sequence Data; D008970:Molecular Weight; D009687:Nuclear Proteins / Q000235:genetics; D009693:Nucleic Acid Hybridization; D011518:Proto-Oncogene Proteins / Q000235:genetics*; D011519:Proto-Oncogenes; D012689:Sequence Homology, Nucleic Acid; D013045:Species Specificity; D014714:Vertebrates / Q000235:genetics*
chemical_list: D004268:DNA-Binding Proteins; D009687:Nuclear Proteins; D011518:Proto-Oncogene Proteins; D004247:DNA