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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erz468
|2 doi
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|a pubmed24n1008.xml
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|a (DE-627)NLM302459545
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|a (NLM)31639820
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Peng, Hao
|e verfasserin
|4 aut
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| 245 |
1 |
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|a CIRCADIAN CLOCK ASSOCIATED 1 and ATAF2 differentially suppress cytochrome P450-mediated brassinosteroid inactivation
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|c 2020
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 06.04.2021
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|a Date Revised 06.04.2021
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|a published: Print
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|a Citation Status MEDLINE
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| 520 |
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|a © The Author(s) 2019. Published by Oxford University Press on behalf of the Society for Experimental Biology.
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|a Brassinosteroids (BRs) are a group of steroid hormones regulating plant growth and development. Since BRs do not undergo transport among plant tissues, their metabolism is tightly regulated by transcription factors (TFs) and feedback loops. BAS1 (CYP734A1, formerly CYP72B1) and SOB7 (CYP72C1) are two BR-inactivating cytochrome P450s identified in Arabidopsis thaliana. We previously found that a TF ATAF2 (ANAC081) suppresses BAS1 and SOB7 expression by binding to the Evening Element (EE) and CIRCADIAN CLOCK ASSOCIATED 1 (CCA1)-binding site (CBS) on their promoters. Both the EE and CBS are known binding targets of the circadian regulatory protein CCA1. Here, we confirm that CCA1 binds the EE and CBS motifs on BAS1 and SOB7 promoters, respectively. Elevated accumulations of BAS1 and SOB7 transcripts in the CCA1 null mutant cca1-1 indicate that CCA1 is a repressor of their expression. When compared with either cca1-1 or the ATAF2 null mutant ataf2-2, the cca1-1 ataf2-2 double mutant shows higher SOB7 transcript accumulations and a stronger BR-insensitive phenotype of hypocotyl elongation in white light. CCA1 interacts with ATAF2 at both DNA-protein and protein-protein levels. ATAF2, BAS1, and SOB7 are all circadian regulated with distinct expression patterns. These results demonstrate that CCA1 and ATAF2 differentially suppress BAS1- and SOB7-mediated BR inactivation
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|a Journal Article
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|a Research Support, U.S. Gov't, Non-P.H.S.
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| 650 |
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|a Arabidopsis thaliana
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|a ATAF2
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|a BAS1
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|a CCA1
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|a SOB7
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|a brassinosteroids
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|a cytochrome P450
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|a hypocotyl growth
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| 650 |
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|a transcription factor
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| 650 |
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|a ATAF2 protein, Arabidopsis
|2 NLM
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| 650 |
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|a Arabidopsis Proteins
|2 NLM
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| 650 |
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|a Brassinosteroids
|2 NLM
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| 650 |
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|a CCA1 protein, Arabidopsis
|2 NLM
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| 650 |
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|a Repressor Proteins
|2 NLM
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| 650 |
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|a Transcription Factors
|2 NLM
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| 650 |
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|a Cytochrome P-450 Enzyme System
|2 NLM
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| 650 |
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|a 9035-51-2
|2 NLM
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| 650 |
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|a CYP72C1 protein, Arabidopsis
|2 NLM
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| 650 |
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|a EC 1.-
|2 NLM
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| 650 |
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|a BAS1 protein, Arabidopsis
|2 NLM
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| 650 |
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|a EC 1.11.1.15
|2 NLM
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| 650 |
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|a Peroxiredoxins
|2 NLM
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| 650 |
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|a EC 1.11.1.15
|2 NLM
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| 700 |
1 |
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|a Neff, Michael M
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 71(2020), 3 vom: 23. Jan., Seite 970-985
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
1 |
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|g volume:71
|g year:2020
|g number:3
|g day:23
|g month:01
|g pages:970-985
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| 856 |
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|u http://dx.doi.org/10.1093/jxb/erz468
|3 Volltext
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|d 71
|j 2020
|e 3
|b 23
|c 01
|h 970-985
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