Journal Article

GMPOZ, a BTB/POZ Domain Nuclear Protein, is a Regulator of Hormone Responsive Gene Expression in Barley Aleurone

Fiona J. Woodger, John V. Jacobsen and Frank Gubler

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 45, issue 7, pages 945-950
Published in print July 2004 | ISSN: 0032-0781
Published online July 2004 | e-ISSN: 1471-9053 | DOI: https://dx.doi.org/10.1093/pcp/pch100
GMPOZ, a BTB/POZ Domain Nuclear Protein, is a Regulator of Hormone Responsive Gene Expression in Barley Aleurone

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  • Biochemistry
  • Molecular and Cell Biology
  • Plant Sciences and Forestry

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GAMYB is a GA-responsive activator of hydrolase gene expression in the aleurone layer of germinated cereal grains. We have isolated a putative GAMYB-binding protein, GMPOZ, which contains a BTB/POZ domain found in certain animal transcriptional regulators. Although BTB/POZ domain proteins are numerous in plants, very few are yet characterized. We found that GMPOZ is nuclear localized and that GMPOZ mRNA is expressed highly in anthers as well as aleurone. Transient silencing of the GMPOZ gene suggests that GMPOZ is involved in hormone responsive gene expression in aleurone.

Keywords: Keywords: Aleurone — α-amylase — BTB/POZ domain — GAMYB — Gibberellin.; Abbreviations: GFP, green fluorescent protein; irRNA, inverted-repeat RNA; ORF, Open reading frame.

Journal Article.  4061 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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