title: Physical and transcript map of the region between D6S264 and D6S149 on chromosome 6q27, the minimal region of allele loss in sporadic epithelial ovarian cancer.
abstract: We have previously shown a high frequency of allele loss at D6S193 (62%) on chromosomal arm 6q27 in ovarian tumours and mapped the minimal region of allele loss between D6S297 and D6S264 (3 cM). We isolated and mapped a single non-chimaeric YAC (17IA12, 260-280 kb) containing D6S193 and D6S297. A further extended bacterial contig (between D6S264 and D6S149) has been established using PACs and BACs and a transcript map has been established. We have mapped six new markers to the YAC; three of them are ESTs (WI-15078, WI-8751, and TCP10). We have isolated three cDNA clones of EST WI-15078 and one clone contains a complete open reading frame. The sequence shows homology to a new member of the ribonuclease family. The other two clones are splice variants of this new gene. The gene is expressed ubiquitously in normal tissues. It is expressed in 4/8 ovarian cancer cell lines by Northern analysis. The gene encodes for a 40 kDa protein. Direct sequencing of the gene in all the eight ovarian cancer cell lines did not identify any mutations. Clonogenic assays were performed by transfecting the full-length gene in to ovarian cancer cell lines and no suppression of growth was observed.
authors.affiliation: ICRF Molecular Oncology Laboratories, John Radcliffe Hospital, Headington, Oxford, OX3 9DS, UK.
authors.forename: Ying
authors.initials: Y
authors.lastname: Liu
authors.forename: Gracy
authors.initials: G
authors.lastname: Emilion
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Mungall
authors.forename: Ian
authors.initials: I
authors.lastname: Dunham
authors.forename: Stephan
authors.initials: S
authors.lastname: Beck
authors.forename: Valerie G
authors.initials: VG
authors.lastname: Le Meuth-Metzinger
authors.forename: Andrew N
authors.initials: AN
authors.lastname: Shelling
authors.forename: Francis M L
authors.initials: FM
authors.lastname: Charnock
authors.forename: Trivadi S
authors.initials: TS
authors.lastname: Ganesan
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D019556:COS Cells; D002896:Chromosomes, Human, Pair 6 / Q000235:genetics*; D003114:Colony-Forming Units Assay; D004847:Epithelial Cells / Q000378:metabolism / Q000473:pathology*; D005091:Exons / Q000235:genetics; D020224:Expressed Sequence Tags; D005260:Female; D020869:Gene Expression Profiling; D015972:Gene Expression Regulation, Neoplastic; D016147:Genes, Tumor Suppressor; D005819:Genetic Markers / Q000235:genetics; D006801:Humans; D007438:Introns / Q000235:genetics; D019656:Loss of Heterozygosity / Q000235:genetics*; D008969:Molecular Sequence Data; D010051:Ovarian Neoplasms / Q000235:genetics* / Q000473:pathology; D020161:Physical Chromosome Mapping; D012333:RNA, Messenger / Q000032:analysis / Q000235:genetics; D012260:Ribonucleases / Q000737:chemistry / Q000235:genetics; D016415:Sequence Alignment; D014158:Transcription, Genetic; D014407:Tumor Cells, Cultured
chemical_list: D005819:Genetic Markers; D012333:RNA, Messenger; D012260:Ribonucleases