The Epigenetic Faces of ULTRAPETALA1

ULTRAPETALA1 (ULT1) is a versatile plant-exclusive protein, initially described as a trithorax group (TrxG) factor that regulates transcriptional activation and counteracts polycomb group (PcG) repressor function. As part of TrxG, ULT1 interacts with ARABIDOPSIS TRITHORAX1 (ATX1) to regulate H3K4me3...

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Bibliographic Details
Published in:Frontiers in plant science 2021-02, Vol.12, p.637244-637244
Main Authors: Ornelas-Ayala, Diego, Garay-Arroyo, Adriana, García-Ponce, Berenice, R Álvarez-Buylla, Elena, Sanchez, María de la Paz
Format: Article
Language:English
Subjects:
Arabidopsis
ATX1
Molecular epigenetic switch
PcG
Plant Science
TrxG
ULTRAPETALA1
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Summary:ULTRAPETALA1 (ULT1) is a versatile plant-exclusive protein, initially described as a trithorax group (TrxG) factor that regulates transcriptional activation and counteracts polycomb group (PcG) repressor function. As part of TrxG, ULT1 interacts with ARABIDOPSIS TRITHORAX1 (ATX1) to regulate H3K4me3 activation mark deposition. However, our recent studies indicate that ULT1 can also act independently of ATX1. Moreover, the ULT1 ability to interact with transcription factors (TFs) and PcG proteins indicates that it is a versatile protein with other roles. Therefore, in this work we revised recent information about the function of Arabidopsis ULT1 to understand the roles of ULT1 in plant development. Furthermore, we discuss the molecular mechanisms of ULT1, highlighting its epigenetic role, in which ULT1 seems to have characteristics of an epigenetic molecular switch that regulates repression and activation processes via TrxG and PcG complexes.
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2021.637244