Requirement of two simultaneous environmental signals for activation of Arabidopsis ELIP2 promoter in response to high light, cold, and UV-B stresses

Arabidopsis EARLY LIGH-INDUCIBLE PROTEIN 2 (ELIP2) is a chlorophyll- and carotenoid-binding protein and is involved in photoprotection under stress conditions. Because its expression is induced through high light, cold, or UV-B stressors, its mechanism of induction has been studied. It is known that...

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Published in:	Plant signaling & behavior Vol. 19; no. 1; p. 2389496
Main Authors:	Samson Ezeh, Okechukwu, Hayami, Natsuki, Mitai, Kana, Kodama, Wasei, Iuchi, Satoshi, Y Yamamoto, Yoshiharu
Format:	Journal Article
Language:	English
Published:	United States Taylor & Francis 31-12-2024 Taylor & Francis Group
Subjects:	Arabidopsis - genetics Arabidopsis - metabolism Arabidopsis - physiology Arabidopsis - radiation effects Arabidopsis Proteins - genetics Arabidopsis Proteins - metabolism Cold Temperature Gene Expression Regulation, Plant - radiation effects Light Promoter Regions, Genetic - genetics Research Paper Signal Transduction - genetics Signal Transduction - radiation effects stress signaling Stress, Physiological - genetics Stress, Physiological - radiation effects synthetic promoter Transcription Factors - genetics Transcription Factors - metabolism transcriptional activation Ultraviolet Rays Synthetic promoter transcriptional activation stress signaling
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Summary:	Arabidopsis EARLY LIGH-INDUCIBLE PROTEIN 2 (ELIP2) is a chlorophyll- and carotenoid-binding protein and is involved in photoprotection under stress conditions. Because its expression is induced through high light, cold, or UV-B stressors, its mechanism of induction has been studied. It is known that a functional unit found in the promoter, which is composed of Element B and Element A, is required and sufficient for full activation by these stressors. In this study, the role of each element in the unit was analyzed by introducing weak mutations in each element as synthetic promoters in addition to intensive repeat constructs of each single element. The results suggest that a stressor like cold stress generates two parallel signals in plant cells, and they merge at the promoter region for the activation of expression, which constitutes an "AND" gate and has a potential to realize strong response with high specificity by an environmental trigger.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1559-2316 1559-2324 1559-2324
DOI:	10.1080/15592324.2024.2389496