β-Dystrobrevin, a dystrophin-related protein that is expressed in non-muscle tissues, is highly homologous to α-dystrobrevin, a member of the dystrophin-associated protein complex (DPC). β-Dystrobrevin associates with Dp71 and syntrophin and is believed to have a role in non-muscle DPCs. Here we report the characterization and mapping of the mouse β-dystrobrevin gene. The mouse β-dystrobrevin gene is organized into 21 exons spanning over 130 kb of DNA. We provide evidence that this gene is transcribed from at least two promoter regions but appears to utilize a common translation initiation site. We show that the similarity between β-dystrobrevin and α-dystrobrevin is reflected in the conservation of their exon-intron junctions. β-Dystrobrevin has been localized to proximal mouse Chromosome (Chr) 12 by backcross mapping. A database search revealed that two mouse genetic diseases involving tissues expressing β-dystrobrevin have been mapped to this region, namely, congenital polycystic kidneys (cpk) and fatty liver dystrophy (fld). However, refined mapping analysis has excluded β-dystrobrevin as a candidate gene for either disease.
Mammalian Genome – Springer Journals
Published: Nov 1, 1998
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