Late-infantile ceroid-lipofuscinosis (CLN2) is an autosomal recessively inherited, neurodegenerative disease in humans. The CLN2 locus has been mapped to Chromosome (Chr) 11p15, and its sequence and genomic organization have recently been reported. In the present study, the cDNA sequence, exon/intron organization, and chromosomal localization of a mouse ortholog of the CLN2 gene are described. The mouse cDNA contains an open reading frame that predicts a protein product of 562 amino acids. The mouse and human coding regions are 86% and 88% identical at the nucleic acid and amino acid levels, respectively. One less codon appears in the mouse cDNA when compared with the human ortholog. The mouse gene (Cln2) spans more than 6 kb and consists of 13 exons separated by introns ranging in size from 111 to 1259 bp. Length polymorphism in an (AC)n microsatellite in intron 3 of the mouse Cln2 gene was used to perform segregation analysis with The Jackson Laboratory DNA Panel Mapping Resource. On the basis of this analysis, the Cln2 gene was localized to a region of mouse Chr 7 that corresponds to human Chr 11p15. Characterization of the mouse Cln2 gene will facilitate generation of a mouse model for late-infantile ceroid-lipofuscinosis by gene targeting and identification of functionally important regions of the Cln2 protein.
Mammalian Genome – Springer Journals
Published: Nov 1, 1999
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