title: Mapping of the gene encoding the multifunctional protein carrying out the first three steps of pyrimidine biosynthesis to human chromosome 2.
abstract: The CAD gene encodes a trifunctional protein that carries the activities of the first three enzymes (carbamyl phosphate synthetase II, aspartate transcarbamylase, and dihydroorotase) of de novo pyrimidine biosynthesis. Genomic fragments of the human CAD gene have been obtained by screening a human genomic library in bacteriophage lambda using a Syrian hamster cDNA clone as a probe. These human genomic clones have been used to assign the CAD gene to human chromosome 2 using in situ hybridization to human metaphase chromosomes and Southern blot hybridization analysis of DNA isolated from a panel of Chinese hamster/human hybrid cells. In situ hybridization analysis has allowed further localization of this gene to the chromosomal region 2p21-p22.
authors.affiliation: Department of Microbiology and Immunology, University of Kentucky Medical Center, Lexington 40536-0084.
authors.forename: K C
authors.initials: KC
authors.lastname: Chen
authors.forename: D B
authors.initials: DB
authors.lastname: Vannais
authors.forename: C
authors.initials: C
authors.lastname: Jones
authors.forename: D
authors.initials: D
authors.lastname: Patterson
authors.forename: J N
authors.initials: JN
authors.lastname: Davidson
mesh_terms: D000581:Amidohydrolases / Q000235:genetics*; D001221:Aspartate Carbamoyltransferase / Q000235:genetics*; D015139:Blotting, Southern; D002223:Carbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing) / Q000235:genetics*; D002874:Chromosome Mapping; D002889:Chromosomes, Human, Pair 2; D004080:Dihydroorotase / Q000235:genetics*; D006801:Humans; D006822:Hybrid Cells; D009097:Multienzyme Complexes / Q000235:genetics*; D009693:Nucleic Acid Hybridization; D011743:Pyrimidines / Q000096:biosynthesis*; D012641:Selection, Genetic
chemical_list: C033626:CAD trifunctional enzyme; D009097:Multienzyme Complexes; D011743:Pyrimidines; D001221:Aspartate Carbamoyltransferase; D000581:Amidohydrolases; D004080:Dihydroorotase; D002223:Carbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing)