title: Multiplex DNA amplification and solid-phase direct sequencing for mutation analysis at the hprt locus in Chinese hamster cells.
abstract: We report here the development of multiplex in vitro DNA amplification and solid-phase direct exon sequencing for the analysis of mutations at the hypoxanthine-guanine phosphoribosyltransferase (hprt) locus in Chinese hamster cells. 18 representative HPRT-deficient mutants, derived either spontaneously, or after exposure to UV light or ionizing radiation, were analyzed. All 9 hprt exons were simultaneously amplified via the polymerase chain reaction (PCR) for rapid deletion detection. 5 mutants involve single- or multiple-exon deletions. Altered multiplex PCR patterns were detected in mutants Bsp-040, Bsp-065 and BGR-606. Subsequent direct sequence analysis reveals that Bsp-040 and Bsp-065 carry a 52-bp and a 13-bp intragenic DNA deletion in exon 3, respectively. BGR-606 contains a 223-bp insertion accompanied by a 10-bp deletion of intron sequence within exon 4 fragment. Other subtle DNA alterations identified by direct exon sequence analysis include single-base substitutions, small deletions and insertions, and RNA splicing mutations.
authors.affiliation: Department of Preventive Medicine and Community Health, University of Texas Medical Branch, Galveston 77555.
authors.forename: Z
authors.initials: Z
authors.lastname: Zu
authors.forename: Y
authors.initials: Y
authors.lastname: Yu
authors.forename: R A
authors.initials: RA
authors.lastname: Gibbs
authors.forename: C T
authors.initials: CT
authors.lastname: Caskey
authors.forename: A W
authors.initials: AW
authors.lastname: Hsie
mesh_terms: D000818:Animals; D001483:Base Sequence; D016466:CHO Cells; D002874:Chromosome Mapping; D006224:Cricetinae; D004252:DNA Mutational Analysis; D007041:Hypoxanthine Phosphoribosyltransferase / Q000235:genetics*; D008969:Molecular Sequence Data; D009154:Mutation; D016133:Polymerase Chain Reaction; D017422:Sequence Analysis, DNA
chemical_list: D007041:Hypoxanthine Phosphoribosyltransferase