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@ARTICLE{Pesch:127291,
author = {M. Pesch and I. Schultheiß and K. Klopffleisch and J. F.
Uhrig and M. Koegl$^*$ and C. S. Clemen and R. Simon and S.
Weidtkamp-Peters and M. Hülskamp},
title = {{TRANSPARENT} {TESTA} {GLABRA}1 and {GLABRA}1 {C}ompete for
{B}inding to {GLABRA}3 in {A}rabidopsis.},
journal = {Plant physiology},
volume = {168},
number = {2},
issn = {1532-2548},
address = {Rockville, Md.},
publisher = {Soc.},
reportid = {DKFZ-2017-03316},
pages = {584 - 597},
year = {2015},
abstract = {The MBW (for R2R3MYB, basic helix-loop-helix [bHLH], and
WD40) genes comprise an evolutionarily conserved gene
cassette that regulates several traits such as
(pro)anthocyanin and anthocyanin biosynthesis and epidermal
cell differentiation in plants. Trichome differentiation in
Arabidopsis (Arabidopsis thaliana) is governed by GLABRA1
(GL1; R2R3MYB), GL3 (bHLH), and transparent TESTA GLABRA1
(TTG1; WD40). They are thought to form a trimeric complex
that acts as a transcriptional activation complex. We
provide evidence that these three MBW proteins form either
GL1 GL3 or GL3 TTG1 dimers. The formation of each dimer is
counteracted by the respective third protein in yeast
three-hybrid assays, pulldown experiments
(luminescence-based mammalian interactome), and fluorescence
lifetime imaging microscopy-fluorescence resonance energy
transfer studies. We further show that two target promoters,
Triptychon (TRY) and CAPRICE (CPC), are differentially
regulated: GL1 represses the activation of the TRY promoter
by GL3 and TTG1, and TTG1 suppresses the activation of the
CPC promoter by GL1 and GL3. Our data suggest that the
transcriptional activation by the MBW complex involves
alternative complex formation and that the two dimers can
differentially regulate downstream genes.},
keywords = {Arabidopsis Proteins (NLM Chemicals) / Basic
Helix-Loop-Helix Transcription Factors (NLM Chemicals) / CPC
protein, Arabidopsis (NLM Chemicals) / DNA-Binding Proteins
(NLM Chemicals) / GL3 protein, Arabidopsis (NLM Chemicals) /
Proto-Oncogene Proteins c-myb (NLM Chemicals) / TTG1
protein, Arabidopsis (NLM Chemicals) / GL1 protein,
Arabidopsis (NLM Chemicals)},
cin = {W150},
ddc = {580},
cid = {I:(DE-He78)W150-20160331},
pnm = {312 - Functional and structural genomics (POF3-312)},
pid = {G:(DE-HGF)POF3-312},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:25926482},
pmc = {pmc:PMC4453790},
doi = {10.1104/pp.15.00328},
url = {https://inrepo02.dkfz.de/record/127291},
}