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Ornelas-Ayala D, Cortés-Quiñones C, Arciniega-González JA, Garay-Arroyo A, García-Ponce B, R Alvarez-Buylla E, Sanchez MDLP. ULTRAPETALAs in action: Unraveling their role in root development. Plant Sci 2024; 340:111975. [PMID: 38181854 DOI: 10.1016/j.plantsci.2024.111975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 12/19/2023] [Accepted: 01/01/2024] [Indexed: 01/07/2024]
Abstract
The epigenetic complex Trithorax (TrxG) regulates gene transcription through post-translational histone modifications and is involved in a wide range of developmental processes. ULTRAPETALA1 (ULT1) is a SAND domain plant-exclusive TrxG protein that regulates the H3K4me3 active mark to counteract PcG repression. ULT1 has been identified to be involved in multiple tissue-specific processes. In the Arabidopsis root, ULT1 is required to maintain the stem cell niche, a role that is independent of the histone methyltransferase ATX1. Here we show the contribution of ULT2 in the maintenance of root stem cell niche. We also analyzed the gene expression in the ult1, ult2, and ult1ult2 mutants, evidencing three ways in which ULT1 and ULT2 regulate gene expression, one of them, where ULT1 or ULT2 regulate specific genes each, another where ULT1 and ULT2 act redundantly, as well as a regulation that requires of ULT1 and ULT2 together, supporting a coregulation, never reported. Furthermore, we also evidenced the participation of ULT1 in transcriptional repression synergically with CLF, a key histone methyltransferase of PcG.
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Affiliation(s)
- Diego Ornelas-Ayala
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria. UNAM, México D.F. 04510, Mexico.
| | - Carlos Cortés-Quiñones
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria. UNAM, México D.F. 04510, Mexico.
| | - J Arturo Arciniega-González
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria. UNAM, México D.F. 04510, Mexico.
| | - Adriana Garay-Arroyo
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria. UNAM, México D.F. 04510, Mexico.
| | - Berenice García-Ponce
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria. UNAM, México D.F. 04510, Mexico.
| | - Elena R Alvarez-Buylla
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria. UNAM, México D.F. 04510, Mexico.
| | - Maria De La Paz Sanchez
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria. UNAM, México D.F. 04510, Mexico.
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Ornelas-Ayala D, Cortés-Quiñones C, Olvera-Herrera J, García-Ponce B, Garay-Arroyo A, Álvarez-Buylla ER, Sanchez MDLP. A Green Light to Switch on Genes: Revisiting Trithorax on Plants. Plants (Basel) 2022; 12:75. [PMID: 36616203 PMCID: PMC9824250 DOI: 10.3390/plants12010075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/18/2022] [Accepted: 12/19/2022] [Indexed: 06/17/2023]
Abstract
The Trithorax Group (TrxG) is a highly conserved multiprotein activation complex, initially defined by its antagonistic activity with the PcG repressor complex. TrxG regulates transcriptional activation by the deposition of H3K4me3 and H3K36me3 marks. According to the function and evolutionary origin, several proteins have been defined as TrxG in plants; nevertheless, little is known about their interactions and if they can form TrxG complexes. Recent evidence suggests the existence of new TrxG components as well as new interactions of some TrxG complexes that may be acting in specific tissues in plants. In this review, we bring together the latest research on the topic, exploring the interactions and roles of TrxG proteins at different developmental stages, required for the fine-tuned transcriptional activation of genes at the right time and place. Shedding light on the molecular mechanism by which TrxG is recruited and regulates transcription.
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Alejo-Vinogradova MT, Ornelas-Ayala D, Vega-León R, Garay-Arroyo A, García-Ponce B, R Álvarez-Buylla E, Sanchez MDLP. Unraveling the role of epigenetic regulation in asymmetric cell division during plant development. J Exp Bot 2022; 73:38-49. [PMID: 34518884 DOI: 10.1093/jxb/erab421] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 09/11/2021] [Indexed: 06/13/2023]
Abstract
Asymmetric cell divisions are essential to generate different cellular lineages. In plants, asymmetric cell divisions regulate the correct formation of the embryo, stomatal cells, apical and root meristems, and lateral roots. Current knowledge of regulation of asymmetric cell divisions suggests that, in addition to the function of key transcription factor networks, epigenetic mechanisms play crucial roles. Therefore, we highlight the importance of epigenetic regulation and chromatin dynamics for integration of signals and specification of cells that undergo asymmetric cell divisions, as well as for cell maintenance and cell fate establishment of both progenitor and daughter cells. We also discuss the polarization and segregation of cell components to ensure correct epigenetic memory or resetting of epigenetic marks during asymmetric cell divisions.
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Affiliation(s)
- M Teresa Alejo-Vinogradova
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de plantas. Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria. UNAM, México D.F. 04510, México
| | - Diego Ornelas-Ayala
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de plantas. Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria. UNAM, México D.F. 04510, México
| | - Rosario Vega-León
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de plantas. Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria. UNAM, México D.F. 04510, México
| | - Adriana Garay-Arroyo
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de plantas. Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria. UNAM, México D.F. 04510, México
| | - Berenice García-Ponce
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de plantas. Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria. UNAM, México D.F. 04510, México
| | - Elena R Álvarez-Buylla
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de plantas. Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria. UNAM, México D.F. 04510, México
| | - María de la Paz Sanchez
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de plantas. Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria. UNAM, México D.F. 04510, México
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Ornelas-Ayala D, Garay-Arroyo A, García-Ponce B, R. Álvarez-Buylla E, Sanchez MDLP. The Epigenetic Faces of ULTRAPETALA1. Front Plant Sci 2021; 12:637244. [PMID: 33719312 PMCID: PMC7947857 DOI: 10.3389/fpls.2021.637244] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 01/21/2021] [Indexed: 05/27/2023]
Abstract
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.
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Affiliation(s)
- Diego Ornelas-Ayala
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria, UNAM, Mexico City, Mexico
| | - Adriana Garay-Arroyo
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria, UNAM, Mexico City, Mexico
- Centro de Ciencias de la Complejidad (C3), Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Berenice García-Ponce
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria, UNAM, Mexico City, Mexico
| | - Elena R. Álvarez-Buylla
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria, UNAM, Mexico City, Mexico
- Centro de Ciencias de la Complejidad (C3), Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - María de la Paz Sanchez
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria, UNAM, Mexico City, Mexico
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Ornelas-Ayala D, Vega-León R, Petrone-Mendoza E, Garay-Arroyo A, García-Ponce B, Álvarez-Buylla ER, Sanchez MDLP. ULTRAPETALA1 maintains Arabidopsis root stem cell niche independently of ARABIDOPSIS TRITHORAX1. New Phytol 2020; 225:1261-1272. [PMID: 31545512 DOI: 10.1111/nph.16213] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 09/14/2019] [Indexed: 05/26/2023]
Abstract
During plant development, morphogenetic processes rely on the activity of meristems. Meristem homeostasis depends on a complex regulatory network constituted by different factors and hormone signaling that regulate gene expression to coordinate the correct balance between cell proliferation and differentiation. ULTRAPETALA1, a transcriptional regulatory protein described as an Arabidopsis Trithorax group factor, has been characterized as a regulator of the shoot and floral meristems activity. Here, we highlight the role of ULTRAPETALA1 in root stem cell niche maintenance. We found that ULTRAPETALA1 is required to regulate both the quiescent center cell division rate and auxin signaling at the root tip. Furthermore, ULTRAPETALA1 regulates columella stem cell differentiation. These roles are independent of the ARABIDOPSIS TRITHORAX1, suggesting a different mechanism by which ULTRAPETALA1 can act in the root apical meristem of Arabidopsis. This work introduces a new component of the regulatory network needed for the root stem cell niche maintenance.
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Affiliation(s)
- Diego Ornelas-Ayala
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria, UNAM, Mexico City, CdMex, 04510, Mexico
| | - Rosario Vega-León
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria, UNAM, Mexico City, CdMex, 04510, Mexico
| | - Emilio Petrone-Mendoza
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria, UNAM, Mexico City, CdMex, 04510, Mexico
| | - Adriana Garay-Arroyo
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria, UNAM, Mexico City, CdMex, 04510, Mexico
- Centro de Ciencias de la Complejidad (C3), Universidad Nacional Autónoma de México, Mexico City, CdMex, 04510, Mexico
| | - Berenice García-Ponce
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria, UNAM, Mexico City, CdMex, 04510, Mexico
| | - Elena R Álvarez-Buylla
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria, UNAM, Mexico City, CdMex, 04510, Mexico
- Centro de Ciencias de la Complejidad (C3), Universidad Nacional Autónoma de México, Mexico City, CdMex, 04510, Mexico
| | - María de la Paz Sanchez
- Laboratorio de Genética Molecular, Epigenética, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria, UNAM, Mexico City, CdMex, 04510, Mexico
- Centro de Ciencias de la Complejidad (C3), Universidad Nacional Autónoma de México, Mexico City, CdMex, 04510, Mexico
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