title: Gene regulation in planta by plant-derived engineered zinc finger protein transcription factors.
abstract: The ability to modify plant traits is of great commercial potential in agricultural biotechnology. To this end we have engineered plant-based zinc finger protein transcription factors (ZFP TFs) that minimize the use of non-plant DNA sequences. This novel architecture supports the use of tandem arrays of zinc-finger DNA recognition domains such that the ZFP TF binds a contiguous DNA target site - thus emulating the design of ZFP TFs described previously for mammalian gene regulation. We show that this plant-based ZFP TF architecture supports high affinity DNA binding while allowing the specificity of the DNA-protein interaction to be determined by the amino acid sequences of the recognition helices. This plant-based backbone thus supports the use of previously characterized DNA recognition helices originally identified in a mammalian ZFP context without using mammalian DNA sequences. Moreover, we show that plant-based ZFP TFs employing this new architecture can up-regulate endogenous ADH activity by > 20-fold in transgenic Arabidopsis. Thus plant-based ZFP TFs are shown to be potent regulators of gene expression in vivo.
authors.affiliation: Plant Gene Expression Center, USDA, Albany, CA 94710, USA.
authors.forename: Rachel
authors.initials: R
authors.lastname: Holmes-Davis
authors.forename: Guofu
authors.initials: G
authors.lastname: Li
authors.forename: Andrew C
authors.initials: AC
authors.lastname: Jamieson
authors.forename: Edward J
authors.initials: EJ
authors.lastname: Rebar
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liu
authors.forename: Yanhong
authors.initials: Y
authors.lastname: Kong
authors.forename: Casey C
authors.initials: CC
authors.lastname: Case
authors.forename: Philip D
authors.initials: PD
authors.lastname: Gregory
mesh_terms: D000426:Alcohol Dehydrogenase / Q000235:genetics / Q000378:metabolism; D000595:Amino Acid Sequence; D017360:Arabidopsis / Q000235:genetics / Q000378:metabolism; D001665:Binding Sites / Q000235:genetics; D001667:Binding, Competitive; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism; D015971:Gene Expression Regulation, Enzymologic; D018506:Gene Expression Regulation, Plant; D008969:Molecular Sequence Data; D018515:Plant Leaves / Q000235:genetics / Q000378:metabolism; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism*; D030821:Plants, Genetically Modified; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D017386:Sequence Homology, Amino Acid; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*; D015854:Up-Regulation / Q000235:genetics; D016335:Zinc Fingers / Q000235:genetics*
chemical_list: D004268:DNA-Binding Proteins; D010940:Plant Proteins; D012333:RNA, Messenger; D011993:Recombinant Fusion Proteins; D014157:Transcription Factors; D000426:Alcohol Dehydrogenase