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    Coamplification in tumors of KRAS2, type 2 inositol 1,4,5 triphosphate receptor gene, and a novel human gene, KRAG.

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    Authors
    Heighway, Jim
    Betticher, Daniel C
    Hoban, Paul R
    Altermatt, H J
    Cowen, Rachel L
    Affiliation
    CRC Department of Cancer Genetics, Paterson Institute for Cancer Research, Christie Hospital (NHS) Trust, Wilmslow Road, Manchester, M20 9BX, United Kingdom.
    Issue Date
    1996-07-01
    
    Metadata
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    Abstract
    Analysis of a region of DNA, coamplified in tumors with KRAS2, resulted in the identification of the human homologue of the mouse KRAG gene. The gene was widely expressed in a range of cell lines, tumors, and normal tissue and demonstrated a high degree of alternate splicing. A human KRAG cDNA sequence, with a structure similar to that encoded by the amplified gene in mouse Y1 adrenal carcinoma cells, was isolated by RT-PCR. The predicted amino acid similarity between the two sequences was 91%, and hydrophobicity plots suggested a structure closely resembling that of transmembrane 4 superfamily members. Identification of a PCR-based restriction fragment length polymorphism confirmed biallelic expression of KRAG but suggested allele-specific splicing differences in tumors. Northern analysis of mRNA derived from a range of tissues suggested high level expression in muscle and confirmed alternate splicing. To facilitate the analysis of exon junctions, a YAC clone encoding the genomic sequence was identified. This allowed the localization of KRAG to human chromosome 12p11.2. Isolation of one end of this nonchimeric clone demonstrated a perfect match with a 247-bp sequence within the 3' untranslated region of the type 2 1,4, 5-inositol triphosphate receptor gene. Multiplex PCR confirmed the inclusion of both genes in the KRAS2 amplicon in human malignancy, suggesting that either may contribute to the malignant phenotype.
    Citation
    Coamplification in tumors of KRAS2, type 2 inositol 1,4,5 triphosphate receptor gene, and a novel human gene, KRAG. 1996, 35 (1):207-14 Genomics
    Journal
    Genomics
    URI
    http://hdl.handle.net/10541/95595
    DOI
    10.1006/geno.1996.0340
    PubMed ID
    8661122
    Type
    Article
    Language
    en
    ISSN
    0888-7543
    ae974a485f413a2113503eed53cd6c53
    10.1006/geno.1996.0340
    Scopus Count
    Collections
    All Paterson Institute for Cancer Research

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