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Cloning and characterization of cDNAs encoding a candidate glycogen storage disease type 1b protein in rodents.

Authors: Lin, B  Annabi, B  Hiraiwa, H  Pan, CJ  Chou, JY 
Citation: Lin B, etal., J Biol Chem 1998 Nov 27;273(48):31656-60.
Web Url: http://www.jbc.org/cgi/content/full/273/48/31656
Pubmed: (View Article at PubMed) PMID:9822626

Glycogen storage disease type 1 (GSD-1) is a group of genetic disorders caused by a deficiency in the activity of the enzyme glucose-6-phosphatase. (G6Pase). GSD-1a and GSD-1b, the two major subgroups, have been confirmed at the molecular genetic level. The gene responsible for GSD-1b maps to human chromosome 11q23 and a candidate human GSD-1b cDNA that encodes a microsomal transmembrane protein has been identified. In this study, we show that this cDNA maps to chromosome 11q23; thus it is a strong candidate for GSD-1b. Furthermore, we isolated and characterized candidate murine and rat GSD-1b cDNAs. Both encode transmembrane proteins sharing 93-95% sequence homology to the human GSD-1b protein. The expression profiles of murine GSD-1b and G6Pase differ both in the liver and in the kidney; the GSD-1b transcript appears before the G6Pase mRNA during development. In addition to G6Pase deficiency, GSD-1b patients suffer neutropenia, neutrophil dysfunction, and recurrent bacterial infections. Interestingly, although the G6Pase mRNA is expressed primarily in the liver, kidney, and intestine, the GSD-1b mRNA is expressed in numerous tissues, including human neutrophils/monocytes.

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CRRD Object Information
CRRD ID: 61591
Created: 2001-04-10
Species: All species
Last Modified: 2001-04-10
Status: ACTIVE



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