Non‐canonical AUX / IAA protein IAA 33 competes with canonical AUX / IAA repressor IAA 5 to negatively regulate auxin signaling
نویسندگان
چکیده
منابع مشابه
Plant Stress Tolerance Requires Auxin-Sensitive Aux/IAA Transcriptional Repressors
The Aux/IAA proteins are auxin-sensitive repressors that mediate diverse physiological and developmental processes in plants [1, 2]. There are 29 Aux/IAA genes in Arabidopsis that exhibit unique but partially overlapping patterns of expression [3]. Although some studies have suggested that individual Aux/IAA genes have specialized function, genetic analyses of the family have been limited by th...
متن کاملAuxin modulates the degradation rate of Aux/IAA proteins.
Aux/IAA gene family members were first identified by their rapid transcriptional increase in response to auxin. Auxin/indole-3-acetic acid protein (Aux/IAA) luciferase (LUC) fusions expressed in Arabidopsis under control of a non-auxin-responsive promoter were used to monitor the effect of auxin on protein abundance independent of transcriptional regulation by auxin. After 2 hr in the presence ...
متن کاملAuxin regulates SCF-dependent degradation of AUX/IAA proteins
* The Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, Texas 78712, USA 3 Department of Biology, University of York, Box 373, York YO10 5YW, UK 2 These authors contributed equally to the work ........................................................................................................................................................................
متن کاملAXR2 encodes a member of the Aux/IAA protein family.
The dominant gain-of-function axr2-1 mutation of Arabidopsis causes agravitropic root and shoot growth, a short hypocotyl and stem, and auxin-resistant root growth. We have cloned the AXR2 gene using a map-based approach, and find that it is the same as IAA7, a member of the IAA (indole-3-acetic acid) family of auxin-inducible genes. The axr2-1 mutation changes a single amino acid in conserved ...
متن کاملVariation in auxin sensing guides AUX/IAA transcriptional repressor ubiquitylation and destruction
Auxin is a small molecule morphogen that bridges SCFTIR1/AFB-AUX/IAA co-receptor interactions leading to ubiquitylation and proteasome-dependent degradation of AUX/IAA transcriptional repressors. Here, we systematically dissect auxin sensing by SCFTIR1-IAA6 and SCFTIR1-IAA19 co-receptor complexes, and assess IAA6/IAA19 ubiquitylation in vitro and IAA6/IAA19 degradation in vivo. We show that TIR...
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ژورنال
عنوان ژورنال: The EMBO Journal
سال: 2019
ISSN: 0261-4189,1460-2075
DOI: 10.15252/embj.2019101515