Abstract
The human FRG1 gene maps to human chromosome 4q35 and was identified as a candidate for facioscapulohumeral muscular dystrophy. However, FRG1 is apparently not causally associated with the disease and as yet, its function remains unclear. We have cloned homologues of FRG1 from two additional vertebrates, the mouse and the Japanese puffer fish Fugu rubripes, and investigated the genomic organization of the genes in the two species. The intron/exon structure of the genes is identical throughout the protein coding region, although the Fugu gene is five times smaller than the mouse gene. We have also identified FRG1 homologues in two nematodes; Caenorhabditis elegans and Brugia malayi. The FRG1 protein is highly conserved and contains a lipocalin sequence motif, suggesting it may function as a transport protein.
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