Journal
PLANT SCIENCE
Volume 253, Issue -, Pages 50-57Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.plantsci.2016.09.002
Keywords
Arabidopsis; Ethylene signaling; EIN3; Sulfur deficiency; SLIM1; Transcriptional regulation
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Funding
- National Science Centre in Poland [2011/03/B/NZ1/01243, 2014/15/B/NZ1/01887]
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Sulfur deficiency in plants leads to metabolic reprogramming through changes of gene expression. SLIM1 is so far the only characterized transcription factor associated strictly with sulfur deficiency stress in Arabidopsis thaliana. It belongs to the same protein family as EIN3, a major positive switch of ethylene signaling pathway. It binds to the specific cis sequence called UPE-box. Here we show that SLIM1 interacts with UPE-box as a homodimer. Interestingly, the same region of the protein is used for heterodimerization with EIN3; however, the heterodimer is not able to recognize UPE-box. Expression of several SLIM1-dependent genes is enhanced in sulfur deficiency grown Arabidopsis ein3-1 seedlings (with mutated EIN3 protein). This implies a possible regulatory mechanism of ethylene in sulfur metabolism through direct EIN3-SLIM1 interaction. (C) 2016 Elsevier Ireland Ltd. All rights reserved.
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