References
Query Results -- Details
MGI Accession ID: MGI:79052
J Number: J:31566
Other Accession IDs:
Title: Deletion and interallelic complementation analysis of Steel mutant mice.
Authors: Bedell MA; Cleveland LS; O'Sullivan TN; Copeland NG; Jenkins NA
Journal: Genetics
Volume: 142
Issue: 3
Date: 1996 Mar
Year: 1996
Pages: 935-44
Review Status: Peer Reviewed
Abstract:
Mutations at the Steel (Sl) locus produce pleiotropic effects on viability as well as hematopoiesis, pigmentation and fertility. Several homozygous viable Sl alleles have previously been shown to contain either structural alterations in mast cell growth factor (Mgf) or regulatory mutations that affect expression of the Mgf gene. More severe Sl alleles cause lethality to homozygous embryos and all lethal Sl alleles examined to dare contain deletions that remove the entire Mgf coding region. As the timing of the lethality varies from early to late in gestation, it is possible that some deletions may affect other closely linked genes in addition to Mgf. We have analyzed the extent of deleted sequences in seven homozygous lethal Sl alleles. The results of this analysis suggest that late gestation lethality represents the Sl null phenotype and that peri-implantation lethality results from the deletion of at least one essential gene that maps proximal to Sl. We have also examined gene dosage effects of Sl by comparing the phenotypes of mice homozygous and hemizygous for each of four viable Sl alleles. Lastly, we show that certain combinations of the viable Sl alleles exhibit interallelic complementation. Possible mechanisms by which such complementation could occur are discussed.
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