Too SHY 2 repress  

作　　者：Jason W.Reed Bastiaan O.R.Bargmann 

机构地区：[1]The University of North Carolina at Chapel Hil,Department of Biology,Chapel Hill,NC27599,USA [2]l2Virginia Polytechnic Institute and State University,School of Plant and EnvironmentalSciences.Blacksburg,VA24061,USA

出　　处：《Molecular Plant》2024年第10期1496-1497,共2页分子植物（英文版）

基　　金：part by funding from the NSF:IOS 2343701toJ.W.R.andIOS2343702toB.O.R.B.

摘　　要：The hormone auxin regulates many aspects of plant development,in part by regulating transcription(Powers and Strader,2020).Two types of proteins control canonical auxin-regulated transcription:class A auxin response transcription factors(ARFs)bind to and activate promoters of auxin-responsive genes and Aux/IAA proteins interact with ARFs to repress gene activation.In angiosperms,multiple paralogous genes encode both ARF and Aux/IAA proteins.Differences in expression patterns or biochemical properties among these paralogs likely underlie diverse auxin response characteristics in different cellular contexts.In a recent issue of Molecular Plant,Cho et al.(2024)showed that a single amino acid difference between two Aux/IAA proteins confers strikingly divergent effects on auxinregulated root hair growth(Cho et al.,2024).In particular,whereas the Aux/IAA protein AXR2/IAA7 always represses auxin response and root hair growth,SHY2/IAA3 can act bimodally to either activate or repress the auxin response,depending on its level relative to other Aux/IAA proteins.

关 键 词：AUX/IAA striking AUXIN 

分 类 号：Q94[生物学—植物学]