Lh. Lin et al., cDNA sequence and chromosomal localization of mouse Dlgh3 gene adjacent tothe BRCA1 tumor suppressor locus, BBA-GENE ST, 1443(1-2), 1998, pp. 211-216
Citations number
15
Categorie Soggetti
Molecular Biology & Genetics
Journal title
BIOCHIMICA ET BIOPHYSICA ACTA-GENE STRUCTURE AND EXPRESSION
Membrane associated guanylate kinase homologues (MAGUKs) function in tumor
suppression and receptor clustering pathways presumably by modulating signa
ling events at the interface of the membrane cytoskeleton. The p55 subclass
of MAGUKs includes two novel cDNAs that were originally identified by virt
ue of their genomic location to human chromosome 17q12-21 where the BRCA1 t
umor suppressor gene has been mapped. The predicted primary structure of th
e human MPP3 contains a single copy of the PDZ domain, an SH3 motif, and a
carboxy-terminal guanylate kinase-like domain. Here we report the full-leng
th coding cDNA sequence of the mouse homologue of MPP3. The translated amin
o acid sequence of murine Dlgh3 contains 568 amino acids that show 87% sequ
ence identity with the human MPP3 protein. Northern blot analysis shows abu
ndant expression of a similar to 3.0 kb transcript of Dlgh3 in mouse brain
and skeletal muscle, and a relatively less abundant similar to 5.0 kb trans
cript in skeletal muscle, testis, kidney, and lung. Using an interspecific
backcross panel, the Dlgh3 gene was mapped to a segment of mouse chromosome
11 that is conserved with human chromosome 17q12-21. The close proximity o
f murine Dlgh3 gene to the BRCA1 locus and the high conservation of the pri
mary structure of human and murine proteins provide a framework for testing
the role of Dlgh3 in cell proliferation pathways using the mouse as a mode
l system, (C) 1998 Elsevier Science B.V. All rights reserved.