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Activator-type R2R3-MYB genes induce a repressor-type R2R3-MYB gene to balance anthocyanin and proanthocyanidin accumulation

Zhou, Hui ; Lin-Wang, Kui ; Wang, Furong ; Espley, Richard V. ; Ren, Fei ; Zhao, Jianbo ; Ogutu, Collins ; He, Huaping ; Jiang, Quan ; Allan, Andrew C. ; Han, Yuepeng

The New phytologist, 2019-03, Vol.221 (4), p.1919-1934 [Periódico revisado por pares]

England: Wiley

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Título:
Activator-type R2R3-MYB genes induce a repressor-type R2R3-MYB gene to balance anthocyanin and proanthocyanidin accumulation
Autor: Zhou, Hui ; Lin-Wang, Kui ; Wang, Furong ; Espley, Richard V. ; Ren, Fei ; Zhao, Jianbo ; Ogutu, Collins ; He, Huaping ; Jiang, Quan ; Allan, Andrew C. ; Han, Yuepeng
Assuntos: Accumulation ; Amino Acid Sequence ; anthocyanin pigmentation ; Anthocyanins ; Anthocyanins - metabolism ; Binding ; Biosynthetic Pathways - genetics ; Evolution, Molecular ; Feedback loops ; Gene Expression Regulation, Plant ; Genes, myb ; Genes, Plant ; Interactions ; Mutation - genetics ; MYB gene ; Negative feedback ; negative feedback loop ; Phylogeny ; Plant Proteins - chemistry ; Plant Proteins - genetics ; Plant Proteins - metabolism ; proanthocyanidin (PA) ; Proanthocyanidins ; Proanthocyanidins - metabolism ; Protein Binding ; Proteins ; Prunus persica ; Prunus persica - genetics ; Prunus persica - growth & development ; R2R3 MYB repressor ; Regulators ; Repressor Proteins - genetics ; Repressor Proteins - metabolism ; Repressors ; Ripening ; Transcription ; Transcription, Genetic
É parte de: The New phytologist, 2019-03, Vol.221 (4), p.1919-1934
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SourceType-Scholarly Journals-1
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content type line 23
Descrição: • Anthocyanin and proanthocyanidin (PA) accumulation is regulated by both myeloblastosis (MYB) activators and repressors, but little information is available on hierarchical interactions between the positive and negative regulators. Here, we report on a R2R3-MYB repressor in peach, designated PpMYB18, which acts as a negative regulator of anthocyanin and PA accumulation. • PpMYB18 can be activated by both anthocyanin- and PA-related MYB activators, and is expressed both at fruit ripening and juvenile stages when anthocyanins or PAs, respectively, are being synthesized. • The PpMYB18 protein competes with MYB activators for binding to basic Helix Loop Helixes (bHLHs), which develops a fine-tuning regulatory loop to balance PA and anthocyanin accumulation. In addition, the bHLH binding motif in the R3 domain and the C1 and C2 repression motifs in the C-terminus of PpMYB18 both confer repressive activity of PpMYB18. • Our study also demonstrates a modifying negative feedback loop, which prevents cells from excess accumulation of anthocyanin and PAs, and serves as a model for balancing secondary metabolite accumulation at the transcriptional level.
Editor: England: Wiley
Idioma: Inglês

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Activator-type R2R3-MYB genes induce a repressor-type R2R3-MYB gene to balance anthocyanin and proanthocyanidin accumulation

Zhou, Hui ; Lin-Wang, Kui ; Wang, Furong ; Espley, Richard V. ; Ren, Fei ; Zhao, Jianbo ; Ogutu, Collins ; He, Huaping ; Jiang, Quan ; Allan, Andrew C. ; Han, Yuepeng

England: Wiley

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