Platelet-derived Growth Factor Receptor Alpha-subunit Gene (Pdgfra) is Deleted in the Mouse Patch (Ph) Mutation

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 1991 Jan 1

PMID 1846043

Citations 46

Authors

D A Stephenson

M Mercola

E Anderson

C Y Wang

C D Stiles

D F Bowen-Pope

V M Chapman

Affiliations

Soon will be listed here.

Abstract

Platelet-derived growth factor receptors are composed of two subunits (alpha and beta) that associate with one another to form three functionally active dimeric receptor species. The two subunits are encoded by separate loci in humans and other species. In this study, we used conventional interspecific backcross mapping and an analysis of a deletional mutation to establish close linkage between the alpha-subunit gene (Pdgfra) and the dominant spotting (W) locus on mouse chromosome 5. Further, by analyzing the restriction fragment length polymorphisms in interspecific F1 hybrids, we were able to demonstrate that the closely associated patch (Ph) locus carries a deletion in Pdgfra. This observation was confirmed by both DNA and RNA analysis of 10.5-day fetuses produced from crosses between Ph heterozygotes. Out of 16 fetuses analyzed, Pdgfra genomic sequences were absent and no mRNA for the receptor was detected in 6 fetuses that were developmentally abnormal (the presumptive Ph homozygotes). We also determined that the deletion associated with the Ph mutation does not extend into the coding sequences of the adjacent Kit gene, by analysis of the genomic DNA from both the interspecific F1 hybrids and the presumptive Ph homozygotes. The absence of Pdgfra genomic sequences and the lack of detectable message associated with the Ph mutation should make this mutant a valuable asset for understanding the role of the receptor alpha subunit during mammalian development.

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