植物学报 ›› 2003, Vol. 20 ›› Issue (04): 395-406.

• 综述与专论 • 上一篇    下一篇

G Protein Regulation of Plant Hormone Action

  

  • 收稿日期:2003-02-26 修回日期:2003-07-01 出版日期:2003-08-20 发布日期:2003-08-20

G Protein Regulation of Plant Hormone Action

Fang BAO Zhenbiao YANG   

  1. (Department of Cell Biology and Molecular Genetics, University of Maryland, USA)
  • Received:2003-02-26 Revised:2003-07-01 Online:2003-08-20 Published:2003-08-20
  • Contact: Fang BAO

Abstract: Transcription co_repressors are negative regulators of gene expression . Since they do not possess a DNA_binding motif, their ability to repress gene expression depends on their association with other DNA_binding transcription factors. One well characterized transcription co_repressor is the yeast Tup1. Although unable to bind DNA by itself, the Tup1 co_repressor is recruited by different DNA_binding transcription factors to repress pathway_specific gene expression. Recent isolations of two Arabidopsis genes, LEUNIG (LUG) and SEUSS (SEU), suggest that similar types of co_repressors are involved in the transcription repression of floral homeotic genes during flower development. This review will summarize these findings, speculate on mechanisms, and discuss future directions.