The tobacco bZIP transcription factor BZI-1 binds to G-box elements in the promoters of phenylpropanoid pathway genes in vitro, but it is not involved in their regulation in vivo

Molecular Genetics and Genomics : MGG
Thorsten HeinekampWolfgang Dröge-Laser

Abstract

Screening of a tobacco (Nicotiana tabacum) cDNA library resulted in the isolation of a clone encoding the bZIP transcription factor BZI-1. With respect to amino acid sequence, conservation of protein domains, genomic exon-intron structure and expression pattern, BZI-1 is closely related to CPRF2, OHP1/2, BLZ1 and REB, a group of bZIP proteins which have been described in a number of dicot and monocot species. BZI-1 exhibits the characteristics of a transcription factor. It binds to G-box and C-box cis-elements in vitro, it is localised in the nucleus, and the N-terminal region of BZI-1 functions as an activation domain in both yeast and plant cells. Since BZI-1-related transcription factors have been isolated from dicots by in vitro binding to G-box elements in the chalcone synthase ( CHS) promoter, it has been suggested that phenylpropanoid pathway genes, such as CHS and PAL (phenylalanine ammonia-lyase), are targets of these proteins in vivo. However, after infection with Pseudomonas syringae or Tobacco Mosaic Virus, no changes in pathogen-induced PAL expression were observed in transgenic plants expressing increased levels of BZI-1 or a dominant negative form of the protein, BZI-1-DeltaN. In contrast to the tissue-specific e...Continue Reading

Citations

Nov 18, 2008·Journal of Experimental Botany·Anita ZamboniMario Pezzotti
Nov 25, 2004·European Journal of Biochemistry·Simone Sell, Reinhard Hehl
Apr 22, 2014·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Ahmed GalalChristian Jung
Apr 14, 2004·The Plant Journal : for Cell and Molecular Biology·Thorsten HeinekampWolfgang Dröge-Laser
Jul 30, 2008·Plant Biotechnology Journal·Caius M RommensKathy Swords
Jul 14, 2011·The Plant Journal : for Cell and Molecular Biology·Nora WehnerWolfgang Dröge-Laser
May 20, 2016·Journal of Experimental Botany·Giulia MalacarneClaudio Moser
Apr 23, 2010·The Plant Journal : for Cell and Molecular Biology·Tim IvenWolfgang Dröge-Laser
Jun 28, 2018·Plant Molecular Biology·Ladislav DokládalEva Sýkorová
Apr 21, 2020·Protein and Peptide Letters·Lígia Cristine Gonçalves PontesCláudia Regina Batista de Souza

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