title: The characterisation of the shikimate pathway enzyme dehydroquinase from Pisum sativum.
abstract: Peptides accounting for 157 residues of the bifunctional shikimate pathway enzyme, dehydroquinase/shikimate dehydrogenase, of Pisum sativum were sequenced. Three of the peptides were homologous to regions in Escherichia coli dehydroquinase and two to E. coli shikimate dehydrogenase. The pea dehydroquinase activity was inhibited by treatment with dehydroquinate plus sodium borohydride, establishing it as a type I dehydroquinase. Synthetic oligonucleotides designed from the amino acid sequence were used as PCR primers to amplify fragments of P. sativum cDNA. DNA sequence analysis showed that these amplified products were derived from dehydroquinase/shikimate dehydrogenase cDNA. The complete amino acid sequence of the dehydroquinase domain has been defined; it is homologous to all other type I dehydroquinases and is N-terminal.
authors.affiliation: Department of Biochemistry, University of Glasgow, Scotland, UK.
authors.forename: R K
authors.initials: RK
authors.lastname: Deka
authors.forename: I A
authors.initials: IA
authors.lastname: Anton
authors.forename: B
authors.initials: B
authors.lastname: Dunbar
authors.forename: J R
authors.initials: JR
authors.lastname: Coggins
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D001665:Binding Sites; D003001:Cloning, Molecular; D017931:DNA Primers; D007887:Fabaceae / Q000201:enzymology*; D006836:Hydro-Lyases / Q000145:classification / Q000235:genetics* / Q000378:metabolism*; D008969:Molecular Sequence Data; D010946:Plants, Medicinal; D016133:Polymerase Chain Reaction; D017421:Sequence Analysis; D017386:Sequence Homology, Amino Acid; D012697:Serine Endopeptidases / Q000378:metabolism; D012765:Shikimic Acid / Q000378:metabolism
chemical_list: D017931:DNA Primers; D012765:Shikimic Acid; D012697:Serine Endopeptidases; C028344:glutamyl endopeptidase; D006836:Hydro-Lyases; C020000:3-dehydroquinate dehydratase