Biochem Biophys Res Commun. 1999 Aug 2;261(2):493-8.

The genomic organization and polymorphism analysis of the human Niemann-Pick C1 gene.

Morris JA, Zhang D, Coleman KG, Nagle J, Pentchev PG, Carstea ED.

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National Institute of Neurological Disorders and Stroke, National Institutes of Health (NIH), Bethesda, Maryland, 20892, USA. jill_morris@merck.com

Abstract

Niemann-Pick C (NP-C) is a fatal autosomal recessive storage disorder characterized by progressive neurodegeneration and variable hepatosplenomegaly. At the cellular level, cells derived from an affected individual accumulate unesterified cholesterol in lysosomes when cultured with low-density lipoprotein. The NP-C gene was identified at 18q11. The transcript is 4.9 kb encoding a 1278-amino-acid protein. We have defined the genomic structure of NPC1 along with the 5' flanking sequence. The NPC1 gene spans greater than 47 kb and contains 25 exons. Exons range in size from 74 to 788 bp with introns ranging in size from 0.097 to 7 kb. All intron/exon boundaries follow the GT/AG rule. The 5' flanking sequence has a CpG island containing multiple Sp1 sites indicative of a promoter region. The CpG island is located in the 5' flanking sequence, exon 1 and the 5' end of intron 1. We have also identified multiple single nucleotide polymorphisms in the coding and intronic sequences.

PMID:: 10425213; [PubMed - indexed for MEDLINE]

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The genomic organization and polymorphism analysis of the human Niemann-Pick C1 gene.

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