Genomic structure and chromosomal localization of the mouse gene Punc

Genomic structure and chromosomal localization of the mouse gene Punc The mouse gene Punc encodes a member of the immunoglobulin superfamily of cell surface proteins. It is highly expressed in the developing embryo in nervous system and limb buds. At mid-gestation, however, expression levels of Punc decrease sharply. To allow investigation of such a regulatory mechanism, the genomic locus encompassing the Punc gene was cloned, characterized, and mapped. Fluorescent in situ hybridization was used to determine the chromosomal location of the Punc gene of mouse and human. Mouse Punc maps to Chromosome (Chr) 9 in the region D-E1, whereas the human PUNC gene is localized to Chr 15 at 15q22.3-23, a region known to be syntenic to mouse 9D-E1. The human PUNC gene therefore maps close to a genetic locus that is linked to Bardet-Biedl Syndrome, an autosomal recessive human disorder. Confirmation for the location of human PUNC was obtained through sequence relationships between mouse Punc cDNA, human PUNC cDNA, genomic sequence upstream of the murine Punc gene, and human STS markers that had been previously mapped on Chr 15. The STS sequence WI-14920 is in fact derived from the 3′-untranslated region of the human PUNC gene. WI-14920 had been placed at 228cR from the top of the Chr 15 linkage group, which provided positional information for the human PUNC gene at high resolution. Thus, this study identifies PUNC as the gene corresponding to a previously anonymous marker and serves as a basis to investigate its role in genetic disorders. Mammalian Genome Springer Journals

Genomic structure and chromosomal localization of the mouse gene Punc

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Copyright © 1999 by Springer-Verlag New York Inc.
Life Sciences; Cell Biology; Animal Genetics and Genomics; Human Genetics
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