title: Identification of class-mu glutathione transferase genes GSTM1-GSTM5 on human chromosome 1p13.
abstract: The GSTM1, GSTM2, GSTM3, GSTM4, and GSTM5 glutathione transferase genes have been mapped to human chromosome 1 by using locus-specific PCR primer pairs spanning exon 6, intron 6, and exon 7, as probes on DNA from human/hamster somatic cell hybrids. For GSTM1, the assignment was confirmed by Southern blot hybridization to a pair of 12.5/2.4-kb HindIII fragments. The GSTM1-specific primer pairs can be used to identify individuals carrying non-null GSTM1 alleles. The organization of these five genes was confirmed by the isolation of a yeast artificial chromosome clone (GSTM-YAC2) that contains all five genes. With this clone, the location of the GSTM1-GSTM5 gene cluster on chromosome 1 was confirmed by fluorescence in situ hybridization. Both regional assignment using the fractional length method and examination of probe signal with reference to R-banded chromosomes induced by BrdU places the gene cluster in or near the 1p13.3 region. The close physical proximity of the GSTM1 and GSTM2 loci, which share 99% nucleotide sequence identity over 460 nucleotides of 3'-untranslated mRNA, suggests that the GSTM1-null allele may result from unequal crossing-over.
authors.affiliation: Department of Biochemistry, University of Virginia, Charlottesville 22908.
authors.forename: W R
authors.initials: WR
authors.lastname: Pearson
authors.forename: W R
authors.initials: WR
authors.lastname: Vorachek
authors.forename: S J
authors.initials: SJ
authors.lastname: Xu
authors.forename: R
authors.initials: R
authors.lastname: Berger
authors.forename: I
authors.initials: I
authors.lastname: Hart
authors.forename: D
authors.initials: D
authors.lastname: Vannais
authors.forename: D
authors.initials: D
authors.lastname: Patterson
mesh_terms: D000818:Animals; D001483:Base Sequence; D015139:Blotting, Southern; D002874:Chromosome Mapping; D015825:Chromosomes, Fungal; D002878:Chromosomes, Human, Pair 1; D006224:Cricetinae; D004247:DNA; D015894:Genome, Human; D015698:Genomic Library; D005982:Glutathione Transferase / Q000145:classification / Q000235:genetics*; D006801:Humans; D006822:Hybrid Cells; D017404:In Situ Hybridization, Fluorescence; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction
chemical_list: D004247:DNA; D005982:Glutathione Transferase