title: Localization of histidase to human chromosome region 12q22----q24.1 and mouse chromosome region 10C2----D1.
abstract: The human gene for histidase (histidine ammonia-lyase; HAL), the enzyme deficient in histidinemia, was assigned to human chromosome 12 by Southern blot analysis of human X mouse somatic cell hybrid DNA. The gene was sublocalized to region 12q22----q24.1 by in situ hybridization, using a human histidase cDNA. The homologous locus in the mouse (Hal) was mapped to region 10C2----D1 by in situ hybridization, using a cell line from a mouse homozygous for a 1.10 Robertsonian translocation. These assignments extend the conserved syntenic region between human chromosome 12 and mouse chromosome 10 that includes the genes for phenylalanine hydroxylase, gamma interferon, peptidase, and citrate synthase. The localization of histidase to mouse chromosome 10 suggests that the histidase regulatory locus (Hsd) and the histidinemia mutation (his), which are both known to be on chromosome 10, may be alleles of the histidase structural gene locus.
authors.affiliation: Research Institute, Hospital for Sick Children, Toronto, Ont., Canada.
authors.forename: R G
authors.initials: RG
authors.lastname: Taylor
authors.forename: J
authors.initials: J
authors.lastname: García-Heras
authors.forename: S J
authors.initials: SJ
authors.lastname: Sadler
authors.forename: R G
authors.initials: RG
authors.lastname: Lafreniere
authors.forename: H F
authors.initials: HF
authors.lastname: Willard
authors.forename: D H
authors.initials: DH
authors.lastname: Ledbetter
authors.forename: R R
authors.initials: RR
authors.lastname: McInnes
mesh_terms: D000592:Amino Acid Metabolism, Inborn Errors / Q000235:genetics*; D000818:Animals; D015139:Blotting, Southern; D002871:Chromosome Banding; D002881:Chromosomes, Human, Pair 12 / Q000648:ultrastructure*; D004247:DNA / Q000235:genetics; D006638:Histidine Ammonia-Lyase / Q000235:genetics*; D006801:Humans; D051379:Mice / Q000235:genetics*; D009693:Nucleic Acid Hybridization
chemical_list: D004247:DNA; D006638:Histidine Ammonia-Lyase