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Li Y, Kamiyama Y, Minegishi F, Tamura Y, Yamashita K, Katagiri S, Takase H, Otani M, Tojo R, Rupp GE, Suzuki T, Kawakami N, Peck SC, Umezawa T. Group C MAP kinases phosphorylate MBD10 to regulate ABA-induced leaf senescence in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024; 118:1747-1759. [PMID: 38477703 DOI: 10.1111/tpj.16706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 02/15/2024] [Accepted: 02/23/2024] [Indexed: 03/14/2024]
Abstract
Abscisic acid (ABA) is a phytohormone that promotes leaf senescence in response to environmental stress. We previously identified methyl CpG-binding domain 10 (MBD10) as a phosphoprotein that becomes differentially phosphorylated after ABA treatment in Arabidopsis. ABA-induced leaf senescence was delayed in mbd10 knockout plants but accelerated in MBD10-overexpressing plants, suggesting that MBD10 positively regulates ABA-induced leaf senescence. ABA-induced phosphorylation of MBD10 occurs in planta on Thr-89, and our results demonstrated that Thr-89 phosphorylation is essential for MBD10's function in leaf senescence. The in vivo phosphorylation of Thr-89 in MBD10 was significantly downregulated in a quadruple mutant of group C MAPKs (mpk1/2/7/14), and group C MAPKs directly phosphorylated MBD10 in vitro. Furthermore, mpk1/2/7/14 showed a similar phenotype as seen in mbd10 for ABA-induced leaf senescence, suggesting that group C MAPKs are the cognate kinases of MBD10 for Thr-89. Because group C MAPKs have been reported to function downstream of SnRK2s, our results indicate that group C MAPKs and MBD10 constitute a regulatory pathway for ABA-induced leaf senescence.
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Grants
- KAKENHI JP21H05654 Ministry of Education, Culture, Sports, Science and Technology
- KAKENHI JP22K19170 Ministry of Education, Culture, Sports, Science and Technology
- KAKENHI JP23H02497 Ministry of Education, Culture, Sports, Science and Technology
- KAKENHI JP23H04192 Ministry of Education, Culture, Sports, Science and Technology
- 20350427 Moonshot Research and Development Program
- JP21J10962 Japan Society for the Promotion of Science
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Affiliation(s)
- Yangdan Li
- Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Koganei, 184-8588, Tokyo, Japan
| | - Yoshiaki Kamiyama
- Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Koganei, 184-8588, Tokyo, Japan
| | - Fuko Minegishi
- Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Koganei, 184-8588, Tokyo, Japan
| | - Yuki Tamura
- Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Koganei, 184-8588, Tokyo, Japan
| | - Kota Yamashita
- Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Koganei, 184-8588, Tokyo, Japan
| | - Sotaro Katagiri
- Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Koganei, 184-8588, Tokyo, Japan
| | - Hinano Takase
- Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Koganei, 184-8588, Tokyo, Japan
| | - Masahiko Otani
- School of Agriculture, Meiji University, Kawasaki, 214-8571, Kanagawa, Japan
| | - Ryo Tojo
- School of Agriculture, Meiji University, Kawasaki, 214-8571, Kanagawa, Japan
| | - Gabrielle E Rupp
- Department of Biochemistry, University of Missouri, Columbia, 65211, Missouri, USA
| | - Takamasa Suzuki
- College of Bioscience and Biotechnology, Chubu University, Kasugai, 487-8501, Aichi, Japan
| | - Naoto Kawakami
- School of Agriculture, Meiji University, Kawasaki, 214-8571, Kanagawa, Japan
| | - Scott C Peck
- Department of Biochemistry, University of Missouri, Columbia, 65211, Missouri, USA
| | - Taishi Umezawa
- Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Koganei, 184-8588, Tokyo, Japan
- Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, 183-8538, Tokyo, Japan
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Wang S, Wang M, Ichino L, Boone BA, Zhong Z, Papareddy RK, Lin EK, Yun J, Feng S, Jacobsen SE. MBD2 couples DNA methylation to transposable element silencing during male gametogenesis. NATURE PLANTS 2024; 10:13-24. [PMID: 38225352 PMCID: PMC10808059 DOI: 10.1038/s41477-023-01599-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 11/27/2023] [Indexed: 01/17/2024]
Abstract
DNA methylation is an essential component of transposable element (TE) silencing, yet the mechanism by which methylation causes transcriptional repression remains poorly understood1-5. Here we study the Arabidopsis thaliana Methyl-CpG Binding Domain (MBD) proteins MBD1, MBD2 and MBD4 and show that MBD2 acts as a TE repressor during male gametogenesis. MBD2 bound chromatin regions containing high levels of CG methylation, and MBD2 was capable of silencing the FWA gene when tethered to its promoter. MBD2 loss caused activation at a small subset of TEs in the vegetative cell of mature pollen without affecting DNA methylation levels, demonstrating that MBD2-mediated silencing acts strictly downstream of DNA methylation. TE activation in mbd2 became more significant in the mbd5 mbd6 and adcp1 mutant backgrounds, suggesting that MBD2 acts redundantly with other silencing pathways to repress TEs. Overall, our study identifies MBD2 as a methyl reader that acts downstream of DNA methylation to silence TEs during male gametogenesis.
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Affiliation(s)
- Shuya Wang
- Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, USA
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, USA
| | - Ming Wang
- Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, USA
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, USA
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Lucia Ichino
- Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, USA
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, USA
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Brandon A Boone
- Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, USA
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, USA
| | - Zhenhui Zhong
- Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, USA
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, USA
| | - Ranjith K Papareddy
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, USA
| | - Evan K Lin
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, USA
| | - Jaewon Yun
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, USA
| | - Suhua Feng
- Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, USA
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, USA
- Eli & Edythe Broad Center of Regenerative Medicine & Stem Cell Research, University of California, Los Angeles, Los Angeles, CA, USA
| | - Steven E Jacobsen
- Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, USA.
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, USA.
- Eli & Edythe Broad Center of Regenerative Medicine & Stem Cell Research, University of California, Los Angeles, Los Angeles, CA, USA.
- Howard Hughes Medical Institute, University of California, Los Angeles, Los Angeles, CA, USA.
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Abstract
BAZ2B is a regulatory subunit of the ISWI (Imitation Switch) remodeling complex and engages in nucleosome remodeling. Loss-of-function and haploinsufficiency of BAZ2B are associated with different diseases. BAZ2B is a large multidomain protein. In addition to the epigenetic reader domains plant homeodomain (PHD) and bromodomain (BRD), BAZ2B also has a Tip5/ARBP/MBD (TAM) domain. Sequence alignment revealed that the TAM domains of BAZ2A and BAZ2B share 53% sequence identity. How the BAZ2A TAM domain bound with DNA has been characterized recently, however, the DNA binding ability and methylation preference, as well as the structural basis of the BAZ2B TAM domain are not studied yet. In this study, we measured the DNA binding affinity of the TAM domain of BAZ2B, and also determined its apo crystal structure. We found that the TAM domains of BAZ2A and BAZ2B adopt almost the same fold, and like BAZ2A, the BAZ2B TAM domain also binds to dsDNA without methyl-cytosine preference, implying that the BAZ2B TAM domain might recognize DNA in a similar binding mode to that of the BAZ2A TAM domain. These results provide clues for the biological function study of BAZ2B in the future.
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Liang J, Li X, Wen Y, Wu X, Wang H, Li D, Song F. Genome-Wide Characterization of the Methyl CpG Binding Domain-Containing Proteins in Watermelon and Functional Analysis of Their Roles in Disease Resistance Through Ectopic Overexpression in Arabidopsis thaliana. FRONTIERS IN PLANT SCIENCE 2022; 13:886965. [PMID: 35615127 PMCID: PMC9125323 DOI: 10.3389/fpls.2022.886965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 04/20/2022] [Indexed: 06/15/2023]
Abstract
Methyl-CPG-Binding Domain (MBD) proteins play important roles in plant growth, development, and stress responses. The present study characterized the MBD families in watermelon and other cucurbit plants regarding the gene numbers and structures, phylogenetic and syntenic relationships, evolution events, and conserved domain organization of the MBD proteins. The watermelon ClMBD proteins were found to be localized in nucleus, and ClMBD2 and ClMBD3 interacted with ClIDM2 and ClIDM3. ClMBD2 bound to DNA harboring methylated CG sites but not to DNA with methylated CHG and CHH sites in vitro. The ClMBD genes exhibited distinct expression patterns in watermelon plants after SA and MeJA treatment and after infection by fungal pathogens Fusarium oxysporum f.sp. niveum and Didymella bryoniae. Overexpression of ClMBD2, ClMBD3, or ClMBD5 in Arabidopsis resulted in attenuated resistance against Botrytis cinerea, accompanied by down-regulated expression of AtPDF1.2 and increased accumulation of H2O2 upon B. cinerea infection. Overexpression of ClMBD1 and ClMBD2 led to down-regulated expression of AtPR1 and decreased resistance while overexpression of ClMBD5 resulted in up-regulated expression of AtPR1 and increased resistance against Pseudomonas syringae pv. tomato DC3000. Transcriptome analysis revealed that overexpression of ClMBD2 in Arabidopsis up-regulated the expression of a small set of genes that negatively regulate Arabidopsis immunity. These data suggest the importance of some ClMBD genes in plant immunity and provide the possibility to improve plant immunity through modification of specific ClMBD genes.
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Affiliation(s)
- Jiayu Liang
- Zhejiang Provincial Key Laboratory of Biology of Crop Pathogens and Insects, Ministry of Agriculture and Rural Affairs (MARA) Key Laboratory of Molecular Biology of Crop Pathogens and Insects, College of Agriculture and Biotechnology, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Xiaodan Li
- Zhejiang Provincial Key Laboratory of Biology of Crop Pathogens and Insects, Ministry of Agriculture and Rural Affairs (MARA) Key Laboratory of Molecular Biology of Crop Pathogens and Insects, College of Agriculture and Biotechnology, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Ya Wen
- Zhejiang Provincial Key Laboratory of Biology of Crop Pathogens and Insects, Ministry of Agriculture and Rural Affairs (MARA) Key Laboratory of Molecular Biology of Crop Pathogens and Insects, College of Agriculture and Biotechnology, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Xinyi Wu
- Zhejiang Provincial Key Laboratory of Biology of Crop Pathogens and Insects, Ministry of Agriculture and Rural Affairs (MARA) Key Laboratory of Molecular Biology of Crop Pathogens and Insects, College of Agriculture and Biotechnology, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Hui Wang
- Zhejiang Provincial Key Laboratory of Biology of Crop Pathogens and Insects, Ministry of Agriculture and Rural Affairs (MARA) Key Laboratory of Molecular Biology of Crop Pathogens and Insects, College of Agriculture and Biotechnology, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Dayong Li
- Zhejiang Provincial Key Laboratory of Biology of Crop Pathogens and Insects, Ministry of Agriculture and Rural Affairs (MARA) Key Laboratory of Molecular Biology of Crop Pathogens and Insects, College of Agriculture and Biotechnology, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Fengming Song
- Zhejiang Provincial Key Laboratory of Biology of Crop Pathogens and Insects, Ministry of Agriculture and Rural Affairs (MARA) Key Laboratory of Molecular Biology of Crop Pathogens and Insects, College of Agriculture and Biotechnology, Institute of Biotechnology, Zhejiang University, Hangzhou, China
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Proteins That Read DNA Methylation. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1389:269-293. [DOI: 10.1007/978-3-031-11454-0_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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