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  • Title: Genomic organization of the mouse fertilin beta gene that encodes an ADAM family protein active in sperm-egg fusion.
    Author: Cho C, Turner L, Primakoff P, Myles DG.
    Journal: Dev Genet; 1997; 20(4):320-8. PubMed ID: 9254906.
    Abstract:
    The fertilin alpha and beta genes (Ftna and Ftnb, respectively) encode a sperm surface heterodimer that functions in sperm-egg fusion. They are the first identified members of a large gene family coding for multidomain membrane proteins (ADAMs) that include A Disintegrin And Metalloprotease domain. In this study, we report the isolation and structural organization of the mouse fertilin beta gene. The gene is present as a single copy and covers a region of approximately 55 kilobases in the genome. The fertilin beta gene is composed of at least 20 exons interrupted by 19 introns. The sizes of the exons are relatively small and vary from 56 to 193 bases; the sizes of introns vary from 350 bases to 9.4 kilobases. The exon-intron boundaries conform to the GT/AG rule with one exception: GC replaces GT at the 5' splice site in intron 13. Comparison of genomic organization between mouse fertilin beta and the previously sequenced ADAM family gene, human MDC [Katagiri et al. (1995): Cytogenet Cell Genet 68:39-44] showed 12 conserved exon-intron boundaries. In addition, we analyzed the fertilin alpha gene, demonstrating that more than one gene is present in the mouse genome.
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