| First Author | Ichihara M | Year | 1995 |
| Journal | EMBO J | Volume | 14 |
| Issue | 5 | Pages | 939-50 |
| PubMed ID | 7889941 | Mgi Jnum | J:23971 |
| Mgi Id | MGI:71765 | Doi | 10.1002/j.1460-2075.1995.tb07075.x |
| Citation | Ichihara M, et al. (1995) Impaired interleukin-3 (IL-3) response of the A/J mouse is caused by a branch point deletion in the IL-3 receptor alpha subunit gene. EMBO J 14(5):939-50 |
| abstractText | Interleukin-3 (IL-3) alone does not support hematopoietic colony formation of bone marrow cells from the A/J mouse. To elucidate the molecular lesion in A/J mice, we examined expression of the alpha and beta subunits of the IL-3 receptor (IL-3R). While IL-3R beta was normally expressed, IL-3R alpha was not detectable on the surface of A/J-derived cells by antibody staining. Genetic linkage analysis using recombinant inbred mouse strains between A/J and IL-3-responsive C57BL/6 indicated that the IL-3R alpha gene locus was responsible for the impaired IL-3 response in A/J mice. Molecular cloning and characterization of A/J-derived IL-3R alpha cDNA revealed that it lacked the sequence corresponding to exon 8, which encodes 10 amino acid residues in the extracellular domain. The aberrant splicing was due to a 5 base pair deletion at the branch point in intron 7 and was reproduced in heterologous cells by transfecting with an IL-3R alpha minigene carrying the deleterious intron. The A/J-specific abnormal form of IL-3R alpha was localized inside the cells, but not on the cell surface, providing the molecular basis for the impaired IL-3 response in the A/J mouse. |
