Journal Article

A Novel Group of Transcriptional Repressors in Arabidopsis

Miho Ikeda and Masaru Ohme-Takagi

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 50, issue 5, pages 970-975
Published in print May 2009 | ISSN: 0032-0781
Published online March 2009 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcp048
A Novel Group of Transcriptional Repressors in Arabidopsis

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

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We showed previously that the ERF-associated amphiphilic repression (EAR) motif is a plant-specific repression domain that contains the conserved amino acid sequence LXLXL. In this report, we describe the identification of a novel repression domain, L/VR/KLFGVXM/V/L, which is different from known EAR motifs, in B3 DNA-binding domain transcription factors in Arabidopsis. Database analysis revealed that 29 Arabidopsis transcription factors, which included members of the RAV, ARF, Hsf and MYB families, contain the R/KLFGV conserved motif found in the novel repression domain. We demonstrated that factors that contain the R/KLFGV motif, namely, RAV1, RAV2, HsfB1 and HsfB2b, exhibited the repressive activity.

Keywords: EAR motif; Repressor; Transcription factor; B3 domain; Hsf; RAV

Journal Article.  2830 words.  Illustrated.

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

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