Sequence similarity between the mammalian bmi-1 proto-oncogene and the Drosophila regulatory genes Psc and Su(z)2.
The bmi-1 proto-oncogene can be activated by Moloney murine leukaemia proviral insertions in E mu-myc transgenic mice. It encodes a highly conserved nuclear protein of 324 amino acids which belongs to a family of proteins containing a putative new zinc-finger. Another closely related member of this family is the mouse protein Mel-18. Here we report on the cloning and characterization of a homologous gene (D-bmi) from Drosophila melanogaster. Our analysis indicates that distinct domains of the mouse Bmi-1 protein, including the putative zinc-finger motif, are highly conserved within the much larger D-Bmi protein. Chromosomal localization and sequence comparison reveal that D-bmi is identical to Posterior Sex Combs (Psc) and indicate that the conserved domains between mouse bmi and Psc are also conserved within Suppressor-2 of Zeste (Su(z)2).
van Lohuizen
M
M
Division of Molecular Genetics, The Netherlands Cancer Institute, Amsterdam.
Frasch
M
M
Wientjens
E
E
Berns
A
A
D000595:Amino Acid Sequence; D000818:Animals; D004331:Drosophila melanogaster / Q000235:genetics*; D005809:Genes, Regulator; D051379:Mice; D008969:Molecular Sequence Data; D009154:Mutation; D009693:Nucleic Acid Hybridization; D010641:Phenotype; D011519:Proto-Oncogenes; D012689:Sequence Homology, Nucleic Acid