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Genomics. 1995 Aug 10;28(3):405-10.

Structure and chromosomal localization of the mouse neurocan gene.

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Max-Planck-Institut für Biochemie, Martinsried, Germany.


Cosmid clones containing the mouse neurocan gene were isolated from a genomic library using rat neurocan cDNA fragments as probe. The murine gene has a size of approximately 25 kb and contains the coding sequence for the mRNA on 15 exons. The exon-intron structure reflected the structural organization of neurocan, which is a multidomain protein belonging to the aggrecan/versican proteoglycan family. All introns between conserved modular protein domains are phase I introns. Primer extension experiments indicate a transcriptional start point 28 bases downstream of a consensus TATA sequence. Further analysis of 1 kb of 5' flanking sequence revealed in addition to AP1, AP2, and SP1 consensus binding sites multiple E-box elements and a glucocorticoid responsive element. Single-strand conformation polymorphism was used to map neurocan to chromosome 8 between the microsatellite markers D8Mit29 and D8Mit78. Among mouse mutants that have been mapped around this region are the three allelic neurological diseases tottering, leaner, and rolling. The multidomain structure and the preferential expression of neurocan in the brain suggest a potential involvement in these diseases.

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