title: Two amidophosphoribosyltransferase genes of Arabidopsis thaliana expressed in different organs.
abstract: Amidophosphoribosyltransferase (ATase: EC 2.4.2.14) is a key enzyme in the pathway of purine nucleotide biosynthesis. We have identified several cDNA clones whose amino acid sequences exhibit similarity with the known ATases in a cDNA library of young floral buds of Arabidopsis thaliana. The cDNA clones are derived from two genes homologous with each other. These cDNAs represent the first plant representatives of ATase gene. Structural comparison with ATases of other organisms has revealed that the two genes encode [4Fe-4S] cluster-dependent ATases. Northern blot analysis showed that expression level of the genes is different in three organs; one gene is expressed in flowers and roots, while the other gene is mainly expressed in leaves.
authors.affiliation: Division 1 of Gene Expression and Regulation, National Institute for Basic Biology, Okazaki, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Ito
authors.forename: H
authors.initials: H
authors.lastname: Shiraishi
authors.forename: K
authors.initials: K
authors.lastname: Okada
authors.forename: Y
authors.initials: Y
authors.lastname: Shimura
mesh_terms: D000582:Amidophosphoribosyltransferase / Q000235:genetics*; D000595:Amino Acid Sequence; D017360:Arabidopsis / Q000201:enzymology / Q000235:genetics*; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000235:genetics; D018744:DNA, Plant / Q000032:analysis; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant / Q000235:genetics*; D008969:Molecular Sequence Data; D018547:Plant Stems / Q000235:genetics; D012333:RNA, Messenger / Q000032:analysis; D018749:RNA, Plant / Q000032:analysis; D017386:Sequence Homology, Amino Acid; D012689:Sequence Homology, Nucleic Acid
chemical_list: D018076:DNA, Complementary; D018744:DNA, Plant; D012333:RNA, Messenger; D018749:RNA, Plant; D000582:Amidophosphoribosyltransferase