title: Gene structure, tissue expression, and linkage mapping of the mouse DLC-1 gene (Arhgap7).
abstract: DLC-1 (deleted in liver cancer 1) is a candidate tumor suppressor gene for hepatocellular carcinoma and other cancers. It is the human homologue of rat p122, which has been shown to function as a GTPase activating protein for RhoA, and it may be involved in signal transduction pathways regulating cell proliferation and adhesion. To establish an animal model for studying the regulation and function of DLC-1, we have undertaken the characterization of the mouse DLC-1 gene. Northern blot analysis shows that the mouse DLC-1 mRNA is widely expressed, with the highest levels in heart, liver, and lung. Mouse genomic clones that contain the entire DLC-1 gene of 47 kb were isolated. The mouse gene consists of 14 exons, and the structural organization is highly similar to that of the human gene. The promoter region of the mouse gene was GC-rich and contained potential binding sites for transcription factors SP1, GCF, and AP-2. A polymorphic microsatellite marker in intron 8 was used for mapping the gene (Arhgap7) to 20 cM on mouse chromosome 8 and for allelotyping of mouse liver tumor DNAs.
authors.affiliation: Laboratory of Experimental Carcinogenesis, Building 37, Room 3C28, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA. marian_durkin@nih.gov
authors.forename: Marian E
authors.initials: ME
authors.lastname: Durkin
authors.forename: Bao-Zhu
authors.initials: BZ
authors.lastname: Yuan
authors.forename: Snorri S
authors.initials: SS
authors.lastname: Thorgeirsson
authors.forename: Nicholas C
authors.initials: NC
authors.lastname: Popescu
mesh_terms: D000818:Animals; D001483:Base Sequence; D006528:Carcinoma, Hepatocellular / Q000235:genetics / Q000473:pathology; D002874:Chromosome Mapping; D004247:DNA / Q000737:chemistry / Q000235:genetics; D005091:Exons; D005260:Female; D020690:GTPase-Activating Proteins / Q000235:genetics*; D017353:Gene Deletion; D015870:Gene Expression; D005796:Genes / Q000235:genetics; D006801:Humans; D007438:Introns; D008113:Liver Neoplasms / Q000235:genetics / Q000473:pathology; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D008815:Mice, Inbred Strains; D008822:Mice, Transgenic; D008969:Molecular Sequence Data; D011401:Promoter Regions, Genetic / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D017422:Sequence Analysis, DNA; D025521:Tumor Suppressor Proteins / Q000235:genetics*
chemical_list: C430864:DLC-1 (deleted in liver cancer) protein, mouse; D020690:GTPase-Activating Proteins; D012333:RNA, Messenger; D025521:Tumor Suppressor Proteins; D004247:DNA