Journal Article

Identification of an F-Box Protein that Negatively Regulates P<sub>i</sub> Starvation Responses

Zhi-Hui Chen, Gareth I. Jenkins and Hugh G. Nimmo

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 49, issue 12, pages 1902-1906
Published in print December 2008 | ISSN: 0032-0781
Published online December 2008 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcn157
Identification of an F-Box Protein that Negatively Regulates Pi Starvation Responses

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

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The Arabidopsis gene At5g21040 encodes a protein containing both WD40 and F-box motifs, termed FBX2. A T-DNA insertional mutant in this gene was obtained. Analysis of this mutant line showed that FBX2 is a negative regulator of several Pi starvation responses. FBX2 interacts with BHLH32, another negative regulator of Pi starvation responses. We suggest that FBX2 may be part of an SCF-like complex that recruits BHLH32 and its partners, potentially targeting the latter for proteolysis.

Keywords: Anthocyanin formation; Arabidopsis thaliana; F-box; Pi starvation; Phosphoenolpyruvate carboxylase kinase; Root hair

Journal Article.  2755 words.  Illustrated.

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

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