Parental imprinting of the Mas protooncogene in mouse.
The Mas protooncogene on mouse chromosome 17 encodes a mitogenic G-protein-coupled cell surface receptor. We investigated the allele-specific expression pattern of the Mas gene on the basis of its proximity to the known imprinted gene for the insulin growth factor type II receptor (Igf2r). Phenotyping of mRNA demonstrated exclusive expression from the paternal allele in all embryonic tissues, including visceral yolk sac, between 11 and 12.5 days of gestation. By 13.5 days of gestation the paternal allele-specific expression of Mas was restricted to heart, tongue and visceral yolk sac, whereas all other tissues exhibited relaxation of the parental imprint. Our results demonstrate parental imprinting of Mas and suggest that the maternally inherited allele is transcriptionally repressed in a developmental and tissue-specific manner.
Villar
A J
AJ
Laboratory of Radiobiology and Environmental Health, University of California, San Francisco 94143.
Pedersen
R A
RA
D000818:Animals; D001483:Base Sequence; D003433:Crosses, Genetic; D018076:DNA, Complementary; D005260:Female; D018392:Genomic Imprinting; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D008969:Molecular Sequence Data; D011505:Protein-Tyrosine Kinases / Q000235:genetics*; D000090063:Proto-Oncogene Mas; D011518:Proto-Oncogene Proteins / Q000235:genetics*; D017526:Receptor, IGF Type 1 / Q000235:genetics; D043562:Receptors, G-Protein-Coupled; D014158:Transcription, Genetic
D018076:DNA, Complementary; D000090063:Proto-Oncogene Mas; D011518:Proto-Oncogene Proteins; D043562:Receptors, G-Protein-Coupled; D011505:Protein-Tyrosine Kinases; D017526:Receptor, IGF Type 1