Molecular interactions of BBX24 and BBX25 with HYH, HY5 HOMOLOG, to modulate Arabidopsis seedling development
| Autor: | Sreeramaiah N. Gangappa, Magnus Holm, Javier Francisco Botto |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
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Short Communication Saccharomyces cerevisiae Arabidopsis Repressor Seedling De-etiolation Plant Science HYH Models Biological purl.org/becyt/ford/1 [https] Ciencias Biológicas purl.org/becyt/ford/1.6 [https] Transcription factor Genetics biology Sequence Homology Amino Acid Arabidopsis Proteins Biología del Desarrollo Nuclear Proteins biology.organism_classification Cell biology DNA-Binding Proteins Repressor Proteins Basic-Leucine Zipper Transcription Factors Seedling Seedlings Etiolation Photomorphogenesis Carrier Proteins Function (biology) CIENCIAS NATURALES Y EXACTAS Protein Binding Transcription Factors HY5 |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| DOI: | 10.4161/psb.25208 |
| Popis: | BBX24 and BBX25 are two important transcriptional regulators, which regulate seedling photomorphogenesis in Arabidopsis. Very recently, we have shown that BBX24 and BBX25 negatively regulate the expression of BBX22, reducing the function of HY5, by physically interacting with its bZIP domain.1 Furthermore, HY5 HOMOLOG, HYH, has been reported to heterodimerize with HY5 and enhances its photomorphogenic function in seedling de-etiolation by serving as coactivator.8 Here, we further report that BBX24 and BBX25 physically interact with HYH. The physical interactions of BBX24 and BBX25 with HYH could lead to depletion of HYH molecules from the active pool and, thus indirectly, reduce the function of HY5 in promoting photomorphogenesis. Hence, our results suggest another mode of regulation by which BBX24 and BBX25 exert their negative effects on HY5 indirectly through HYH for the fine-tuning of seedling photomorphogenesis. Fil: Gangappa, Sreeramaiah N.. Gothenburg University. Department of Biological and Environmental Sciences; Suecia Fil: Holm, Magnus. Gothenburg University. Department of Biological and Environmental Sciences; Suecia Fil: Botto, Javier Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina |
| Databáze: | OpenAIRE |
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