title: Cloning, expression, and functional characterization of the Dunaliella salina 5-enolpyruvylshikimate-3-phosphate synthase gene in Escherichia coli.
abstract: 5-enolpyruvylshikimate-3-phosphate synthase (EPSP synthase, EC 2.5.1.19) is the sixth enzyme in the shikimate pathway which is essential for the synthesis of aromatic amino acids and many secondary metabolites. The enzyme is widely involved in glyphosate tolerant transgenic plants because it is the primary target of the nonselective herbicide glyphosate. In this study, the Dunaliella salina EPSP synthase gene was cloned by RT-PCR approach. It contains an open reading frame encoding a protein of 514 amino acids with a calculated molecular weight of 54.6 KDa. The derived amino acid sequence showed high homology with other EPSP synthases. The Dunaliella salina EPSP synthase gene was expressed in Escherichia coli and the recombinant EPSP synthase were identified by functional complementation assay.
authors.affiliation: Key Laboratory of Bio-resources and Eco-environment, Ministry of Education, College of Life Sciences, Sichuan University, Sichuan 610064, P. R. China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Yi
authors.forename: Dairong
authors.initials: D
authors.lastname: Qiao
authors.forename: Linhan
authors.initials: L
authors.lastname: Bai
authors.forename: Hui
authors.initials: H
authors.lastname: Xu
authors.forename: Ya
authors.initials: Y
authors.lastname: Li
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Wang
authors.forename: Yi
authors.initials: Y
authors.lastname: Cao
mesh_terms: D051229:3-Phosphoshikimate 1-Carboxyvinyltransferase / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D020418:Algal Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D000595:Amino Acid Sequence; D002455:Cell Division / Q000187:drug effects / Q000235:genetics; D000460:Chlorophyta / Q000201:enzymology* / Q000235:genetics; D003001:Cloning, Molecular; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000201:enzymology* / Q000235:genetics / Q000254:growth & development; D017353:Gene Deletion; D015971:Gene Expression Regulation, Enzymologic; D005816:Genetic Complementation Test; D005998:Glycine / Q000031:analogs & derivatives / Q000494:pharmacology; D008969:Molecular Sequence Data; D008970:Molecular Weight; D011994:Recombinant Proteins / Q000737:chemistry / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017386:Sequence Homology, Amino Acid; D000097797:Glyphosate
chemical_list: D051229:3-Phosphoshikimate 1-Carboxyvinyltransferase; D020418:Algal Proteins; D005998:Glycine; D011994:Recombinant Proteins; D000097797:Glyphosate