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Wu R, Song K, Jing R, Du L. The de-ubiquitinase UBQUITIN SPECIFIC PROTEASE 15 (UBP15) interacts with the SCF E3 complex adaptor ARABIDOPSIS SKP1 HOMOLOGUE 1 (ASK1) to regulate petal size and fertility in Arabidopsis thaliana. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2024; 345:112112. [PMID: 38750799 DOI: 10.1016/j.plantsci.2024.112112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 04/14/2024] [Accepted: 05/05/2024] [Indexed: 05/20/2024]
Abstract
Ubiquitination is a pivotal type of post-translational modification, which plays a far-reaching role in plant growth and development, as well as in the response of plants to stress. Just like the two sides of a coin, de-ubiquitination also plays an important role in plant life, which has been gradually discovered in recent years. Here, we demonstrate that the UBQUITIN SPECIFIC PROTEASE 15 (UBP15), which is a UBP-type de-ubiquitinase, interacts with the SCF E3 complex adaptor ARABIDOPSIS SKP1 HOMOLOGUE 1 (ASK1) and influences its protein stability to regulate plant fertility and petal size. The UBP15 is associated with the ASK1 physically, as verified by yeast-two-hybrid (Y2H) and protein pull-down in vitro assays. Disruption of ASK1 by a T-DNA insertion generates some abnormal phenotypes, such as low fertility and small petals. Genetic analysis shows that the UBP15 mutation enhances the low-fertility and small-petal phenotypes of ask1 mutant plants. By proteomic analysis, many types of proteins were identified as potential candidate downstream genes associated with the phenotypes of ubp15 ask1 double mutant plants. Taken together, these findings reveal a molecular relationship between ASK1 and UBP15 and their interaction in the regulation of petal size and fertility, which would benefit in-depth research about the ubiquitin-related pathway in plant physiological processes in the future.
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Affiliation(s)
- Ruihua Wu
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China; Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, China
| | - Kaixuan Song
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China; Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, China
| | - Ruotong Jing
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China; Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, China
| | - Liang Du
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China; Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, China.
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2
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Zeng L, Gomez Mendez MF, Guo J, Jiang J, Zhang B, Chen H, Le B, Ke H, Dehesh K. Activation of stress-response genes by retrograde signaling-mediated destabilization of nuclear importin IMPα-9 and its interactor TPR2. MOLECULAR PLANT 2024; 17:884-899. [PMID: 38693693 DOI: 10.1016/j.molp.2024.04.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 01/26/2024] [Accepted: 04/21/2024] [Indexed: 05/03/2024]
Abstract
Stress-induced retrograde signal transmission from the plastids to the nucleus has long puzzled plant biologists. To address this, we performed a suppressor screen of the ceh1 mutant, which contains elevated 2-C-methyl-d-erythritol-2,4-cyclopyrophosphate (MEcPP) levels, and identified the gain-of-function mutant impα-9, which shows reversed dwarfism and suppressed expression of stress-response genes in the ceh1 background despite heightened MEcPP. Subsequent genetic and biochemical analyses established that the accumulation of MEcPP initiates an upsurge in Arabidopsis SKP1-like 1 (ASK1) abundance, a pivotal component in the proteasome degradation pathway. This increase in ASK1 prompts the degradation of IMPα-9. Moreover, we uncovered a protein-protein interaction between IMPα-9 and TPR2, a transcriptional co-suppressor and found that a reduction in IMPα-9 levels coincides with a decrease in TPR2 abundance. Significantly, the interaction between IMPα-9 and TPR2 was disrupted in impα-9 mutants, highlighting the critical role of a single amino acid alteration in maintaining their association. Disruption of their interaction results in the reversal of MEcPP-associated phenotypes. Chromatin immunoprecipitation coupled with sequencing analyses revealed that TPR2 binds globally to stress-response genes and suggested that IMPα-9 associates with the chromatin. They function together to suppress the expression of stress-response genes under normal conditions, but this suppression is alleviated in response to stress through the degradation of the suppressing machinery. The biological relevance of our discoveries was validated under high light stress, marked by MEcPP accumulation, elevated ASK1 levels, IMPα-9 degredation, reduced TPR2 abundance, and subsequent activation of a network of stress-response genes. In summary, our study collectively unveils fresh insights into plant adaptive mechanisms, highlighting intricate interactions among retrograde signaling, the proteasome, and nuclear transport machinery.
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Affiliation(s)
- Liping Zeng
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, Riverside, CA 92521, USA
| | - Maria Fernanda Gomez Mendez
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, Riverside, CA 92521, USA
| | - Jingzhe Guo
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, Riverside, CA 92521, USA
| | - Jishan Jiang
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, Riverside, CA 92521, USA
| | - Bailong Zhang
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, Riverside, CA 92521, USA; School of Medicine, University of California, Riverside, Riverside, CA 92521, USA
| | - Hao Chen
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, Riverside, CA 92521, USA
| | - Brandon Le
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, Riverside, CA 92521, USA
| | - Haiyan Ke
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, Riverside, CA 92521, USA
| | - Katayoon Dehesh
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, Riverside, CA 92521, USA.
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3
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Ohnishi Y, Kawashima T. Evidence of a novel silencing effect on transgenes in the Arabidopsis thaliana sperm cell. THE PLANT CELL 2023; 35:3926-3936. [PMID: 37602710 PMCID: PMC10615207 DOI: 10.1093/plcell/koad219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 07/17/2023] [Accepted: 08/08/2023] [Indexed: 08/22/2023]
Abstract
We encountered unexpected transgene silencing in Arabidopsis thaliana sperm cells; transgenes encoding proteins with no specific intracellular localization (cytoplasmic proteins) were silenced transcriptionally or posttranscriptionally. The mRNA of cytoplasmic protein transgenes tagged with a fluorescent protein gene was significantly reduced, resulting in undetectable fluorescent protein signals in the sperm cell. Silencing of the cytoplasmic protein transgenes in the sperm cell did not affect the expression of either its endogenous homologous genes or cotransformed transgenes encoding a protein with targeted intracellular localization. This transgene silencing in the sperm cell persisted in mutants of the major gene silencing machinery including DNA methylation. The incomprehensible, yet real, transgene silencing phenotypes occurring in the sperm cell could mislead the interpretation of experimental results in plant reproduction, and this Commentary calls attention to that risk and highlights details of this novel cytoplasmic protein transgene silencing.
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Affiliation(s)
- Yukinosuke Ohnishi
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY 40503,USA
| | - Tomokazu Kawashima
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY 40503,USA
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Xu W, Yu Y, Jing J, Wu Z, Zhang X, You C, Ma H, Copenhaver GP, He Y, Wang Y. SCF RMF mediates degradation of the meiosis-specific recombinase DMC1. Nat Commun 2023; 14:5044. [PMID: 37598222 PMCID: PMC10439943 DOI: 10.1038/s41467-023-40799-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 08/10/2023] [Indexed: 08/21/2023] Open
Abstract
Meiotic recombination requires the specific RecA homolog DMC1 recombinase to stabilize strand exchange intermediates in most eukaryotes. Normal DMC1 levels are crucial for its function, yet the regulatory mechanisms of DMC1 stability are unknown in any organism. Here, we show that the degradation of Arabidopsis DMC1 by the 26S proteasome depends on F-box proteins RMF1/2-mediated ubiquitination. Furthermore, RMF1/2 interact with the Skp1 ortholog ASK1 to form the ubiquitin ligase complex SCFRMF1/2. Genetic analyses demonstrate that RMF1/2, ASK1 and DMC1 act in the same pathway downstream of SPO11-1 dependent meiotic DNA double strand break formation and that the proper removal of DMC1 is crucial for meiotic crossover formation. Moreover, six DMC1 lysine residues were identified as important for its ubiquitination but not its interaction with RMF1/2. Our results reveal mechanistic insights into how the stability of a key meiotic recombinase that is broadly conserved in eukaryotes is regulated.
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Affiliation(s)
- Wanyue Xu
- State Key Laboratory of Genetic Engineering and Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, China
| | - Yue Yu
- State Key Laboratory of Genetic Engineering and Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, China
| | - Juli Jing
- MOE Key Laboratory of Crop Heterosis and Utilization, National Maize Improvement Center of China, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Zhen Wu
- State Key Laboratory of Genetic Engineering and Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, China
| | - Xumin Zhang
- State Key Laboratory of Genetic Engineering and Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, China
| | - Chenjiang You
- State Key Laboratory of Genetic Engineering and Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, China
| | - Hong Ma
- Department of Biology, the Huck Institutes of the Life Sciences, the Pennsylvania State University, University Park, PA, USA
| | - Gregory P Copenhaver
- Department of Biology and the Integrative Program for Biological and Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Yan He
- MOE Key Laboratory of Crop Heterosis and Utilization, National Maize Improvement Center of China, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Yingxiang Wang
- State Key Laboratory of Genetic Engineering and Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, China.
- College of Life Sciences, Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, South China Agricultural University, Guangzhou, China.
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China.
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5
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Sun L, Cao S, Zheng N, Kao TH. Analyses of Cullin1 homologs reveal functional redundancy in S-RNase-based self-incompatibility and evolutionary relationships in eudicots. THE PLANT CELL 2023; 35:673-699. [PMID: 36478090 PMCID: PMC9940881 DOI: 10.1093/plcell/koac357] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
In Petunia (Solanaceae family), self-incompatibility (SI) is regulated by the polymorphic S-locus, which contains the pistil-specific S-RNase and multiple pollen-specific S-Locus F-box (SLF) genes. SLFs assemble into E3 ubiquitin ligase complexes known as Skp1-Cullin1-F-box complexes (SCFSLF). In pollen tubes, these complexes collectively mediate ubiquitination and degradation of all nonself S-RNases, but not self S-RNase, resulting in cross-compatible, but self-incompatible, pollination. Using Petunia inflata, we show that two pollen-expressed Cullin1 (CUL1) proteins, PiCUL1-P and PiCUL1-B, function redundantly in SI. This redundancy is lost in Petunia hybrida, not because of the inability of PhCUL1-B to interact with SSK1, but due to a reduction in the PhCUL1-B transcript level. This is possibly caused by the presence of a DNA transposon in the PhCUL1-B promoter region, which was inherited from Petunia axillaris, one of the parental species of Pe. hybrida. Phylogenetic and syntenic analyses of Cullin genes in various eudicots show that three Solanaceae-specific CUL1 genes share a common origin, with CUL1-P dedicated to S-RNase-related reproductive processes. However, CUL1-B is a dispersed duplicate of CUL1-P present only in Petunia, and not in the other species of the Solanaceae family examined. We suggest that the CUL1s involved (or potentially involved) in the SI response in eudicots share a common origin.
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Affiliation(s)
- Linhan Sun
- Intercollege Graduate Degree Program in Plant Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Shiyun Cao
- Howard Hughes Medical Institute, Department of Pharmacology, University of Washington, Seattle, Washington 98195, USA
| | - Ning Zheng
- Howard Hughes Medical Institute, Department of Pharmacology, University of Washington, Seattle, Washington 98195, USA
| | - Teh-hui Kao
- Intercollege Graduate Degree Program in Plant Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
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Bano N, Aalam S, Bag SK. Tubby-like proteins (TLPs) transcription factor in different regulatory mechanism in plants: a review. PLANT MOLECULAR BIOLOGY 2022; 110:455-468. [PMID: 36255595 DOI: 10.1007/s11103-022-01301-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 07/14/2022] [Indexed: 06/16/2023]
Abstract
Tubby-like proteins (TLPs) transcription factors are found in single-celled to multi-cellular eukaryotes in the form of large multigene families. TLPs are identified through a specific signature of carboxyl terminal tubby domain, required for plasma membrane tethering and amino terminal F-box domain communicate as functional SCF-type E3 ligases. The comprehensive distribution of TLP gene family members in diverse species indicates some conserved functions of TLPs in multicellular organisms. Plant TLPs have higher gene members than animals and these members reported important role in multiple physiological and developmental processes and various environmental stress responses. Although the TLPs are suggested to be a putative transcription factors but their functional mechanism is not much clear. This review provides significant recent updates on TLP-mediated regulation with an insight into its functional roles, origin and evolution and also phytohormones related regulation to combat with various stresses and its involvement in adaptive stress response in crop plants.
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Affiliation(s)
- Nasreen Bano
- CSIR-National Botanical Research Institute (CSIR-NBRI), Rana Pratap Marg, Lucknow, 226001, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Shahre Aalam
- CSIR-National Botanical Research Institute (CSIR-NBRI), Rana Pratap Marg, Lucknow, 226001, India
| | - Sumit Kumar Bag
- CSIR-National Botanical Research Institute (CSIR-NBRI), Rana Pratap Marg, Lucknow, 226001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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7
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Negative regulation of seed germination by maternal AFB1 and AFB5 in Arabidopsis. Biosci Rep 2022; 42:231693. [PMID: 36039862 PMCID: PMC9469108 DOI: 10.1042/bsr20221504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/18/2022] [Accepted: 08/25/2022] [Indexed: 11/26/2022] Open
Abstract
The plant hormone auxin suppresses seed germination, but how auxin does it remains poorly understood. While studying the functions of the AUXIN SIGNALING F-BOX (AFB) auxin co-receptors in Arabidopsis, we consistently isolated AFB1 and AFB5 in reproductive tissues in co-immunoprecipitation experiments using their interacting protein ASK1 as the bait. However, T2 seeds of the AFB1 or AFB5 transgenic lines generated for the co-immunoprecipitation experiments frequently failed to germinate, which led to the studies of seed germination in these plants and afb1 and afb5 mutants, and AFB1 and AFB5 expression in nearly mature fruit and imbibed seeds using AFB1:GUS and AFB5:GUS lines. We found that AFB1 and AFB5 acted in maternal tissues to suppress seed germination and their effects were positively correlated with the plants’ sensitivity to indole acetic acid. Conversely, afb1 and afb5 single mutants exhibited faster seed germination than the wild type and the seeds of the afb1-5afb5-5 double mutant germinated even faster than those of the afb1-5 and afb5-5 single mutants. Seed germination of the afb1-5afb5-5 double mutant also exhibited higher sensitivity to gibberellic acid than that of the wild-type and the afb1-3, afb1-5 and afb5-5 single mutants. Both AFB1 and AFB5 were expressed in the funiculus during seed maturation, and AFB1 was also transiently expressed in a small chalazal region surrounding the hilum in the seed coat during seed imbibition. Therefore, AFB1 and AFB5 likely suppress seed germination in the funiculus and AFB1 also briefly suppresses seed germination in the chalaza during seed imbibition.
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Jing J, Wu N, Xu W, Wang Y, Pawlowski WP, He Y. An F-box protein ACOZ1 functions in crossover formation by ensuring proper chromosome compaction during maize meiosis. THE NEW PHYTOLOGIST 2022; 235:157-172. [PMID: 35322878 DOI: 10.1111/nph.18116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 03/09/2022] [Indexed: 06/14/2023]
Abstract
Meiosis is an essential reproductive process to create new genetic variation. During early meiosis, higher order chromosome organization creates a platform for meiotic processes to ensure the accuracy of recombination and chromosome segregation. However, little is known about the regulatory mechanisms underlying dynamic chromosome organization in plant meiosis. Here, we describe abnormal chromosome organization in zygotene1 (ACOZ1), which encodes a canonical F-box protein in maize. In acoz1 mutant meiocytes, chromosomes maintain a leptotene-like state and never compact to a zygotene-like configuration. Telomere bouquet formation and homologous pairing are also distorted and installation of synaptonemal complex ZYP1 protein is slightly defective. Loading of early recombination proteins RAD51 and DMC1 is unaffected, indicating that ACOZ1 is not required for double strand break formation or repair. However, crossover formation is severely disturbed. The ACOZ1 protein localizes on the boundary of chromatin, rather directly to chromosomes. Furthermore, we identified that ACOZ1 interacts with SKP1 through its C-terminus, revealing that it acts as a subunit of the SCF E3 ubiquitin/SUMO ligase complex. Overall, our results suggest that ACOZ1 functions independently from the core meiotic recombination pathway to influence crossover formation by controlling chromosome compaction during maize meiosis.
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Affiliation(s)
- Juli Jing
- MOE Key Laboratory of Crop Heterosis and Utilization, National Maize Improvement Center of China, College of Agronomy and Biotechnology, China Agricultural University, Beijing, 100094, China
| | - Nan Wu
- MOE Key Laboratory of Crop Heterosis and Utilization, National Maize Improvement Center of China, College of Agronomy and Biotechnology, China Agricultural University, Beijing, 100094, China
| | - Wanyue Xu
- State Key Laboratory of Genetic Engineering and Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, 200438, China
| | - Yingxiang Wang
- State Key Laboratory of Genetic Engineering and Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, 200438, China
| | | | - Yan He
- MOE Key Laboratory of Crop Heterosis and Utilization, National Maize Improvement Center of China, College of Agronomy and Biotechnology, China Agricultural University, Beijing, 100094, China
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9
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Guan Y, Lin H, Leu NA, Ruthel G, Fuchs SY, Busino L, Luo M, Wang PJ. SCF ubiquitin E3 ligase regulates DNA double-strand breaks in early meiotic recombination. Nucleic Acids Res 2022; 50:5129-5144. [PMID: 35489071 PMCID: PMC9122608 DOI: 10.1093/nar/gkac304] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 04/08/2022] [Accepted: 04/14/2022] [Indexed: 12/12/2022] Open
Abstract
Homeostasis of meiotic DNA double strand breaks (DSB) is critical for germline genome integrity and homologous recombination. Here we demonstrate an essential role for SKP1, a constitutive subunit of the SCF (SKP1-Cullin-F-box) ubiquitin E3 ligase, in early meiotic processes. SKP1 restrains accumulation of HORMAD1 and the pre-DSB complex (IHO1-REC114-MEI4) on the chromosome axis in meiotic germ cells. Loss of SKP1 prior to meiosis leads to aberrant localization of DSB repair proteins and a failure in synapsis initiation in meiosis of both males and females. Furthermore, SKP1 is crucial for sister chromatid cohesion during the pre-meiotic S-phase. Mechanistically, FBXO47, a meiosis-specific F-box protein, interacts with SKP1 and HORMAD1 and targets HORMAD1 for polyubiquitination and degradation in HEK293T cells. Our results support a model wherein the SCF ubiquitin E3 ligase prevents hyperactive DSB formation through proteasome-mediated degradation of HORMAD1 and subsequent modulation of the pre-DSB complex during meiosis.
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Affiliation(s)
- Yongjuan Guan
- Department of Biomedical Sciences, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA, USA
| | - Huijuan Lin
- Department of Biomedical Sciences, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA, USA
- Department of Tissue and Embryology, Hubei Provincial Key Laboratory of Developmentally Originated Disease, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei Province, China
| | - N Adrian Leu
- Department of Biomedical Sciences, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA, USA
| | - Gordon Ruthel
- Department of Pathobiology, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA, USA
| | - Serge Y Fuchs
- Department of Biomedical Sciences, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA, USA
| | - Luca Busino
- Department of Cancer Biology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Mengcheng Luo
- Department of Tissue and Embryology, Hubei Provincial Key Laboratory of Developmentally Originated Disease, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei Province, China
| | - P Jeremy Wang
- Department of Biomedical Sciences, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA, USA
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Cao L, Wang S, Zhao L, Qin Y, Wang H, Cheng Y. The Inactivation of Arabidopsis UBC22 Results in Abnormal Chromosome Segregation in Female Meiosis, but Not in Male Meiosis. PLANTS (BASEL, SWITZERLAND) 2021; 10:plants10112418. [PMID: 34834780 PMCID: PMC8625819 DOI: 10.3390/plants10112418] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 10/18/2021] [Accepted: 11/04/2021] [Indexed: 06/13/2023]
Abstract
Protein ubiquitination is important for the regulation of meiosis in eukaryotes, including plants. However, little is known about the involvement of E2 ubiquitin-conjugating enzymes in plant meiosis. Arabidopsis UBC22 is a unique E2 enzyme, able to catalyze the formation of ubiquitin dimers through lysine 11 (K11). Previous work has shown that ubc22 mutants are defective in megasporogenesis, with most ovules having no or abnormally functioning megaspores; furthermore, some mutant plants show distinct phenotypes in vegetative growth. In this study, we showed that chromosome segregation and callose deposition were abnormal in mutant female meiosis while male meiosis was not affected. The meiotic recombinase DMC1, required for homologous chromosome recombination, showed a dispersed distribution in mutant female meiocytes compared to the presence of strong foci in WT female meiocytes. Based on an analysis of F1 plants produced from crosses using a mutant as the female parent, about 24% of female mutant gametes had an abnormal content of DNA, resulting in frequent aneuploids among the mutant plants. These results show that UBC22 is critical for normal chromosome segregation in female meiosis but not for male meiosis, and they provide important leads for studying the role of UBC22 and K11-linked ubiquitination.
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Affiliation(s)
- Ling Cao
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Center for Genomics and Biotechnology, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (L.C.); (L.Z.); (Y.Q.)
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada;
| | - Sheng Wang
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada;
| | - Lihua Zhao
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Center for Genomics and Biotechnology, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (L.C.); (L.Z.); (Y.Q.)
| | - Yuan Qin
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Center for Genomics and Biotechnology, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (L.C.); (L.Z.); (Y.Q.)
| | - Hong Wang
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada;
| | - Yan Cheng
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Center for Genomics and Biotechnology, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (L.C.); (L.Z.); (Y.Q.)
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11
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Sato M, Kakui Y, Toya M. Tell the Difference Between Mitosis and Meiosis: Interplay Between Chromosomes, Cytoskeleton, and Cell Cycle Regulation. Front Cell Dev Biol 2021; 9:660322. [PMID: 33898463 PMCID: PMC8060462 DOI: 10.3389/fcell.2021.660322] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 03/02/2021] [Indexed: 12/04/2022] Open
Abstract
Meiosis is a specialized style of cell division conserved in eukaryotes, particularly designed for the production of gametes. A huge number of studies to date have demonstrated how chromosomes behave and how meiotic events are controlled. Yeast substantially contributed to the understanding of the molecular mechanisms of meiosis in the past decades. Recently, evidence began to accumulate to draw a perspective landscape showing that chromosomes and microtubules are mutually influenced: microtubules regulate chromosomes, whereas chromosomes also regulate microtubule behaviors. Here we focus on lessons from recent advancement in genetical and cytological studies of the fission yeast Schizosaccharomyces pombe, revealing how chromosomes, cytoskeleton, and cell cycle progression are organized and particularly how these are differentiated in mitosis and meiosis. These studies illuminate that meiosis is strategically designed to fulfill two missions: faithful segregation of genetic materials and production of genetic diversity in descendants through elaboration by meiosis-specific factors in collaboration with general factors.
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Affiliation(s)
- Masamitsu Sato
- Laboratory of Cytoskeletal Logistics, Center for Advanced Biomedical Sciences (TWIns), Waseda University, Tokyo, Japan.,Institute for Advanced Research of Biosystem Dynamics, Waseda Research Institute for Science and Engineering, Graduate School of Advanced Science and Engineering, Waseda University, Tokyo, Japan.,Institute for Medical-Oriented Structural Biology, Waseda University, Tokyo, Japan
| | - Yasutaka Kakui
- Laboratory of Cytoskeletal Logistics, Center for Advanced Biomedical Sciences (TWIns), Waseda University, Tokyo, Japan.,Waseda Institute for Advanced Study, Waseda University, Tokyo, Japan
| | - Mika Toya
- Laboratory of Cytoskeletal Logistics, Center for Advanced Biomedical Sciences (TWIns), Waseda University, Tokyo, Japan.,Institute for Advanced Research of Biosystem Dynamics, Waseda Research Institute for Science and Engineering, Graduate School of Advanced Science and Engineering, Waseda University, Tokyo, Japan.,Major in Bioscience, Global Center for Science and Engineering, Faculty of Science and Engineering, Waseda University, Tokyo, Japan
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12
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Orr JN, Waugh R, Colas I. Ubiquitination in Plant Meiosis: Recent Advances and High Throughput Methods. FRONTIERS IN PLANT SCIENCE 2021; 12:667314. [PMID: 33897750 PMCID: PMC8058418 DOI: 10.3389/fpls.2021.667314] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 03/15/2021] [Indexed: 06/06/2023]
Abstract
Meiosis is a specialized cell division which is essential to sexual reproduction. The success of this highly ordered process involves the timely activation, interaction, movement, and removal of many proteins. Ubiquitination is an extraordinarily diverse post-translational modification with a regulatory role in almost all cellular processes. During meiosis, ubiquitin localizes to chromatin and the expression of genes related to ubiquitination appears to be enhanced. This may be due to extensive protein turnover mediated by proteasomal degradation. However, degradation is not the only substrate fate conferred by ubiquitination which may also mediate, for example, the activation of key transcription factors. In plant meiosis, the specific roles of several components of the ubiquitination cascade-particularly SCF complex proteins, the APC/C, and HEI10-have been partially characterized indicating diverse roles in chromosome segregation, recombination, and synapsis. Nonetheless, these components remain comparatively poorly understood to their counterparts in other processes and in other eukaryotes. In this review, we present an overview of our understanding of the role of ubiquitination in plant meiosis, highlighting recent advances, remaining challenges, and high throughput methods which may be used to overcome them.
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Affiliation(s)
- Jamie N. Orr
- Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom
| | - Robbie Waugh
- Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom
- School of Life Sciences, University of Dundee, Dundee, United Kingdom
- School of Agriculture and Wine, University of Adelaide, Adelaide, SA, Australia
| | - Isabelle Colas
- Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom
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13
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Barakate A, Orr J, Schreiber M, Colas I, Lewandowska D, McCallum N, Macaulay M, Morris J, Arrieta M, Hedley PE, Ramsay L, Waugh R. Barley Anther and Meiocyte Transcriptome Dynamics in Meiotic Prophase I. FRONTIERS IN PLANT SCIENCE 2021; 11:619404. [PMID: 33510760 PMCID: PMC7835676 DOI: 10.3389/fpls.2020.619404] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 12/15/2020] [Indexed: 05/07/2023]
Abstract
In flowering plants, successful germinal cell development and meiotic recombination depend upon a combination of environmental and genetic factors. To gain insights into this specialized reproductive development program we used short- and long-read RNA-sequencing (RNA-seq) to study the temporal dynamics of transcript abundance in immuno-cytologically staged barley (Hordeum vulgare) anthers and meiocytes. We show that the most significant transcriptional changes in anthers occur at the transition from pre-meiosis to leptotene-zygotene, which is followed by increasingly stable transcript abundance throughout prophase I into metaphase I-tetrad. Our analysis reveals that the pre-meiotic anthers are enriched in long non-coding RNAs (lncRNAs) and that entry to meiosis is characterized by their robust and significant down regulation. Intriguingly, only 24% of a collection of putative meiotic gene orthologs showed differential transcript abundance in at least one stage or tissue comparison. Argonautes, E3 ubiquitin ligases, and lys48 specific de-ubiquitinating enzymes were enriched in prophase I meiocyte samples. These developmental, time-resolved transcriptomes demonstrate remarkable stability in transcript abundance in meiocytes throughout prophase I after the initial and substantial reprogramming at meiosis entry and the complexity of the regulatory networks involved in early meiotic processes.
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Affiliation(s)
- Abdellah Barakate
- Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom
| | - Jamie Orr
- Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom
| | - Miriam Schreiber
- Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom
| | - Isabelle Colas
- Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom
| | | | - Nicola McCallum
- Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom
| | - Malcolm Macaulay
- Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom
| | - Jenny Morris
- Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom
| | - Mikel Arrieta
- Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom
| | - Pete E. Hedley
- Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom
| | - Luke Ramsay
- Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom
| | - Robbie Waugh
- Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom
- School of Life Sciences, University of Dundee, Dundee, United Kingdom
- School of Agriculture and Wine, University of Adelaide, Adelaide, SA, Australia
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14
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Yang X, You C, Wang X, Gao L, Mo B, Liu L, Chen X. Widespread occurrence of microRNA-mediated target cleavage on membrane-bound polysomes. Genome Biol 2021; 22:15. [PMID: 33402203 PMCID: PMC7784310 DOI: 10.1186/s13059-020-02242-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 12/14/2020] [Indexed: 02/07/2023] Open
Abstract
Background Small RNAs (sRNAs) including microRNAs (miRNAs) and small interfering RNAs (siRNAs) serve as core players in gene silencing at transcriptional and post-transcriptional levels in plants, but their subcellular localization has not yet been well studied, thus limiting our mechanistic understanding of sRNA action. Results We investigate the cytoplasmic partitioning of sRNAs and their targets globally in maize (Zea mays, inbred line “B73”) and rice (Oryza sativa, cv. “Nipponbare”) by high-throughput sequencing of polysome-associated sRNAs and 3′ cleavage fragments, and find that both miRNAs and a subset of 21-nucleotide (nt)/22-nt siRNAs are enriched on membrane-bound polysomes (MBPs) relative to total polysomes (TPs) across different tissues. Most of the siRNAs are generated from transposable elements (TEs), and retrotransposons positively contributed to MBP overaccumulation of 22-nt TE-derived siRNAs (TE-siRNAs) as opposed to DNA transposons. Widespread occurrence of miRNA-mediated target cleavage is observed on MBPs, and a large proportion of these cleavage events are MBP-unique. Reproductive 21PHAS (21-nt phasiRNA-generating) and 24PHAS (24-nt phasiRNA-generating) precursors, which were commonly considered as noncoding RNAs, are bound by polysomes, and high-frequency cleavage of 21PHAS precursors by miR2118 and 24PHAS precursors by miR2275 is further detected on MBPs. Reproductive 21-nt phasiRNAs are enriched on MBPs as opposed to TPs, whereas 24-nt phasiRNAs are nearly completely devoid of polysome occupancy. Conclusions MBP overaccumulation is a conserved pattern for cytoplasmic partitioning of sRNAs, and endoplasmic reticulum (ER)-bound ribosomes function as an independent regulatory layer for miRNA-induced gene silencing and reproductive phasiRNA biosynthesis in maize and rice.
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Affiliation(s)
- Xiaoyu Yang
- Guangdong Provincial Key Laboratory for Plant Epigenetics, Longhua Bioindustry and Innovation Research Institute, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, China
| | - Chenjiang You
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, CA, 92521, USA
| | - Xufeng Wang
- Guangdong Provincial Key Laboratory for Plant Epigenetics, Longhua Bioindustry and Innovation Research Institute, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, China.,Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, CA, 92521, USA
| | - Lei Gao
- Guangdong Provincial Key Laboratory for Plant Epigenetics, Longhua Bioindustry and Innovation Research Institute, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, China
| | - Beixin Mo
- Guangdong Provincial Key Laboratory for Plant Epigenetics, Longhua Bioindustry and Innovation Research Institute, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, China
| | - Lin Liu
- Guangdong Provincial Key Laboratory for Plant Epigenetics, Longhua Bioindustry and Innovation Research Institute, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, China.
| | - Xuemei Chen
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, CA, 92521, USA.
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15
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Lu Z, Guo X, Huang Z, Xia J, Li X, Wu J, Yu H, Shahid MQ, Liu X. Transcriptome and Gene Editing Analyses Reveal MOF1a Defect Alters the Expression of Genes Associated with Tapetum Development and Chromosome Behavior at Meiosis Stage Resulting in Low Pollen Fertility of Tetraploid Rice. Int J Mol Sci 2020; 21:ijms21207489. [PMID: 33050591 PMCID: PMC7589589 DOI: 10.3390/ijms21207489] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/29/2020] [Accepted: 10/01/2020] [Indexed: 01/07/2023] Open
Abstract
Autotetraploid rice is a useful rice germplasm for polyploid rice breeding. However, low fertility limits its commercial production. A neo-tetraploid rice with high fertility was developed from the progenies of crossing between autotetraploid lines by our research group. Our previous study showed that a myeloblastosis (MYB) transcription factor, MOF1, might be associated with the pollen development in tetraploid rice. However, little information is available about its role in pollen development in tetraploid rice. Here, we identified a new haplotype of MOF1 from neo-tetraploid rice and marked it as MOF1a. Transcriptome and qRT-PCR analysis demonstrated that MOF1a highly expressed in anthers, and displayed differential expression in neo-tetraploid rice compared to tetraploid rice line with low pollen fertility. The mutant (mof1a) of MOF1a, which was generated by CRISPR/Cas9 knockout in neo-tetraploid rice, showed low pollen fertility, and also exhibited abnormal tapetum and middle layer development, and defective chromosome behaviors during meiosis. A total of 13 tapetal related genes were found to be up-regulated in meiotic anthers of MOF1a compared with wild type plants by RNA-seq analysis, including CYP703A3, PTC1, and OsABCG26, which had been demonstrated to affect tapetal development. Moreover, 335 meiosis-related genes displayed differential expression patterns at same stage, including nine important meiosis-related genes, such as metallothionein OsMT1a. These results demonstrated that MOF1a plays an important role in pollen development and provides a foundation for understanding the molecular mechanism underlying MOF1a in reproduction of tetraploid rice.
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Affiliation(s)
- Zijun Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (Z.L.); (X.G.); (Z.H.); (J.X.); (X.L.); (J.W.); (H.Y.)
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Xiaotong Guo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (Z.L.); (X.G.); (Z.H.); (J.X.); (X.L.); (J.W.); (H.Y.)
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Zhiyu Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (Z.L.); (X.G.); (Z.H.); (J.X.); (X.L.); (J.W.); (H.Y.)
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Juan Xia
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (Z.L.); (X.G.); (Z.H.); (J.X.); (X.L.); (J.W.); (H.Y.)
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Xiang Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (Z.L.); (X.G.); (Z.H.); (J.X.); (X.L.); (J.W.); (H.Y.)
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Jinwen Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (Z.L.); (X.G.); (Z.H.); (J.X.); (X.L.); (J.W.); (H.Y.)
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Hang Yu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (Z.L.); (X.G.); (Z.H.); (J.X.); (X.L.); (J.W.); (H.Y.)
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Muhammad Qasim Shahid
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (Z.L.); (X.G.); (Z.H.); (J.X.); (X.L.); (J.W.); (H.Y.)
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
- Correspondence: (M.Q.S.); (X.L.); Tel./Fax: +86-208-528-0205 (M.Q.S. & X.L.)
| | - Xiangdong Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (Z.L.); (X.G.); (Z.H.); (J.X.); (X.L.); (J.W.); (H.Y.)
- Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China
- College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
- Correspondence: (M.Q.S.); (X.L.); Tel./Fax: +86-208-528-0205 (M.Q.S. & X.L.)
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16
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Yapa MM, Yu P, Liao F, Moore AG, Hua Z. Generation of a fertile ask1 mutant uncovers a comprehensive set of SCF-mediated intracellular functions. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2020; 104:493-509. [PMID: 33543567 DOI: 10.1111/tpj.14939] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 07/09/2020] [Indexed: 06/12/2023]
Abstract
Many eukaryotic intracellular processes employ protein ubiquitylation by ubiquitin E3 ligases for functional regulation or protein quality control. In plants, the multi-subunit Skp1-Cullin1-F-box (SCF) complexes compose the largest group of E3 ligases whose specificity is determined by a diverse array of F-box proteins. Although both sequence divergence and polymorphism of F-box genes well support a broad spectrum of SCF functions, experimental evidence is scarce due to the low number of identified SCF substrates. Taking advantage of the bridge role of Skp1 between F-box and Cullin1 in the complex, we systematically analyzed the functional influence of a well-characterized Arabidopsis Skp1-Like1 (ASK1) Ds insertion allele, ask1, in different Arabidopsis accessions. Through 10 generations of backcrossing with Columbia-0 (Col-0), we partially rescued the fertility of this otherwise sterile ask1 allele in Landsberg erecta, thus providing experimental evidence showing the polymorphic roles of SCF complexes. This ask1 mutant produces twisted rosette leaves, a reduced number of petals, fewer viable pollen grains, and larger embryos and seeds compared to Col-0. RNA-Seq-based transcriptome analysis of ask1 uncovered a large spectrum of SCF functions, which is greater than a 10-fold increase compared with previous studies. We also identified its hyposensitive responses to auxin and abscisic acid treatments and enhanced far-red light/phyA-mediated photomorphogenesis. Such diverse roles are consistent with the 20-30% reduction of ubiquitylation events in ask1 estimated by immunoblotting analysis in this work. Collectively, we conclude that ASK1 is a predominant Skp1 protein in Arabidopsis and that the fertile ask1 mutant allowed us to uncover a comprehensive set of SCF functions.
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Affiliation(s)
- Madhura M Yapa
- Department of Environmental and Plant Biology, Ohio University, Athens, Ohio, 45701, USA
| | - Peifeng Yu
- Department of Environmental and Plant Biology, Ohio University, Athens, Ohio, 45701, USA
- Interdisciplinary Program in Molecular and Cellular Biology, Ohio University, Athens, Ohio, 45701, USA
| | - Fanglei Liao
- Department of Environmental and Plant Biology, Ohio University, Athens, Ohio, 45701, USA
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, Zhejiang, 321004, China
| | - Abigail G Moore
- Department of Environmental and Plant Biology, Ohio University, Athens, Ohio, 45701, USA
| | - Zhihua Hua
- Department of Environmental and Plant Biology, Ohio University, Athens, Ohio, 45701, USA
- Interdisciplinary Program in Molecular and Cellular Biology, Ohio University, Athens, Ohio, 45701, USA
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17
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Pan X, Yan W, Chang Z, Xu Y, Luo M, Xu C, Chen Z, Wu J, Tang X. OsMYB80 Regulates Anther Development and Pollen Fertility by Targeting Multiple Biological Pathways. PLANT & CELL PHYSIOLOGY 2020; 61:988-1004. [PMID: 32142141 PMCID: PMC7217667 DOI: 10.1093/pcp/pcaa025] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 03/01/2020] [Indexed: 05/13/2023]
Abstract
Pollen development is critical to the reproductive success of flowering plants, but how it is regulated is not well understood. Here, we isolated two allelic male-sterile mutants of OsMYB80 and investigated how OsMYB80 regulates male fertility in rice. OsMYB80 was barely expressed in tissues other than anthers, where it initiated the expression during meiosis, reached the peak at the tetrad-releasing stage and then quickly declined afterward. The osmyb80 mutants exhibited premature tapetum cell death, lack of Ubisch bodies, no exine and microspore degeneration. To understand how OsMYB80 regulates anther development, RNA-seq analysis was conducted to identify genes differentially regulated by OsMYB80 in rice anthers. In addition, DNA affinity purification sequencing (DAP-seq) analysis was performed to identify DNA fragments interacting with OsMYB80 in vitro. Overlap of the genes identified by RNA-seq and DAP-seq revealed 188 genes that were differentially regulated by OsMYB80 and also carried an OsMYB80-interacting DNA element in the promoter. Ten of these promoter elements were randomly selected for gel shift assay and yeast one-hybrid assay, and all showed OsMYB80 binding. The 10 promoters also showed OsMYB80-dependent induction when co-expressed in rice protoplast. Functional annotation of the 188 genes suggested that OsMYB80 regulates male fertility by directly targeting multiple biological processes. The identification of these genes significantly enriched the gene networks governing anther development and provided much new information for the understanding of pollen development and male fertility.
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Affiliation(s)
- Xiaoying Pan
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Wei Yan
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China
- Shenzhen Institute of Molecular Crop Design, Shenzhen 518107, China
| | - Zhenyi Chang
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China
- Shenzhen Institute of Molecular Crop Design, Shenzhen 518107, China
| | - Yingchao Xu
- Guangdong Provincial Key Laboratory of Applied Botany, Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Ming Luo
- Guangdong Provincial Key Laboratory of Applied Botany, Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Chunjue Xu
- Shenzhen Institute of Molecular Crop Design, Shenzhen 518107, China
| | - Zhufeng Chen
- Shenzhen Institute of Molecular Crop Design, Shenzhen 518107, China
- Corresponding authors: Xiaoyan Tang, E-mail, ; Fax, +86 020 85211372; Jianxin Wu, E-mail, ; Fax, +86 020 85211372; Zhufeng Chen; E-mail, ; Fax, + 86 2085211372
| | - Jianxin Wu
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China
- Corresponding authors: Xiaoyan Tang, E-mail, ; Fax, +86 020 85211372; Jianxin Wu, E-mail, ; Fax, +86 020 85211372; Zhufeng Chen; E-mail, ; Fax, + 86 2085211372
| | - Xiaoyan Tang
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China
- Shenzhen Institute of Molecular Crop Design, Shenzhen 518107, China
- Corresponding authors: Xiaoyan Tang, E-mail, ; Fax, +86 020 85211372; Jianxin Wu, E-mail, ; Fax, +86 020 85211372; Zhufeng Chen; E-mail, ; Fax, + 86 2085211372
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18
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Guan Y, Leu NA, Ma J, Chmátal L, Ruthel G, Bloom JC, Lampson MA, Schimenti JC, Luo M, Wang PJ. SKP1 drives the prophase I to metaphase I transition during male meiosis. SCIENCE ADVANCES 2020; 6:eaaz2129. [PMID: 32232159 PMCID: PMC7096161 DOI: 10.1126/sciadv.aaz2129] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 01/03/2020] [Indexed: 06/01/2023]
Abstract
The meiotic prophase I to metaphase I (PI/MI) transition requires chromosome desynapsis and metaphase competence acquisition. However, control of these major meiotic events is poorly understood. Here, we identify an essential role for SKP1, a core subunit of the SKP1-Cullin-F-box (SCF) ubiquitin E3 ligase, in the PI/MI transition. SKP1 localizes to synapsed chromosome axes and evicts HORMAD proteins from these regions in meiotic spermatocytes. SKP1-deficient spermatocytes display premature desynapsis, precocious pachytene exit, loss of PLK1 and BUB1 at centromeres, but persistence of HORMAD, γH2AX, RPA2, and MLH1 in diplonema. Strikingly, SKP1-deficient spermatocytes show sharply reduced MPF activity and fail to enter MI despite treatment with okadaic acid. SKP1-deficient oocytes exhibit desynapsis, chromosome misalignment, and progressive postnatal loss. Therefore, SKP1 maintains synapsis in meiosis of both sexes. Furthermore, our results support a model where SKP1 functions as the long-sought intrinsic metaphase competence factor to orchestrate MI entry during male meiosis.
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Affiliation(s)
- Yongjuan Guan
- Department of Biomedical Sciences, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA, USA
| | - N. Adrian Leu
- Department of Biomedical Sciences, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA, USA
| | - Jun Ma
- Department of Biomedical Sciences, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA, USA
- Department of Biology, University of Pennsylvania, 433 South University Avenue, Philadelphia, PA, USA
| | - Lukáš Chmátal
- Department of Biology, University of Pennsylvania, 433 South University Avenue, Philadelphia, PA, USA
- Whitehead Institute, Cambridge, MA, USA
| | - Gordon Ruthel
- Department of Pathobiology, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA, USA
| | - Jordana C. Bloom
- Center for Vertebrate Genomics, Cornell University, Ithaca, NY, USA
| | - Michael A. Lampson
- Department of Biology, University of Pennsylvania, 433 South University Avenue, Philadelphia, PA, USA
| | | | - Mengcheng Luo
- Department of Tissue and Embryology, Hubei Provincial Key Laboratory of Developmentally Originated Disease, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei Province, China
| | - P. Jeremy Wang
- Department of Biomedical Sciences, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA, USA
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19
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Hua Z, Gao Z. Adaptive and degenerative evolution of the S-Phase Kinase-Associated Protein 1-Like family in Arabidopsis thaliana. PeerJ 2019; 7:e6740. [PMID: 30997292 PMCID: PMC6463862 DOI: 10.7717/peerj.6740] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 03/07/2019] [Indexed: 11/20/2022] Open
Abstract
Genome sequencing has uncovered tremendous sequence variation within and between species. In plants, in addition to large variations in genome size, a great deal of sequence polymorphism is also evident in several large multi-gene families, including those involved in the ubiquitin-26S proteasome protein degradation system. However, the biological function of this sequence variation is yet not clear. In this work, we explicitly demonstrated a single origin of retroposed Arabidopsis Skp1-Like (ASK) genes using an improved phylogenetic analysis. Taking advantage of the 1,001 genomes project, we here provide several lines of polymorphism evidence showing both adaptive and degenerative evolutionary processes in ASK genes. Yeast two-hybrid quantitative interaction assays further suggested that recent neutral changes in the ASK2 coding sequence weakened its interactions with some F-box proteins. The trend that highly polymorphic upstream regions of ASK1 yield high levels of expression implied negative expression regulation of ASK1 by an as-yet-unknown transcriptional suppression mechanism, which may contribute to the polymorphic roles of Skp1-CUL1-F-box complexes. Taken together, this study provides new evolutionary evidence to guide future functional genomic studies of SCF-mediated protein ubiquitylation.
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Affiliation(s)
- Zhihua Hua
- Department of Environmental and Plant Biology and Interdisciplinary Program in Molecular and Cellular Biology, Ohio University, Athens, OH, USA
| | - Zhenyu Gao
- Department of Environmental and Plant Biology and Interdisciplinary Program in Molecular and Cellular Biology, Ohio University, Athens, OH, USA
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
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20
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Huang J, Wang C, Wang H, Lu P, Zheng B, Ma H, Copenhaver GP, Wang Y. Meiocyte-Specific and AtSPO11-1-Dependent Small RNAs and Their Association with Meiotic Gene Expression and Recombination. THE PLANT CELL 2019; 31:444-464. [PMID: 30674694 PMCID: PMC6447014 DOI: 10.1105/tpc.18.00511] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 12/21/2018] [Accepted: 01/18/2019] [Indexed: 05/04/2023]
Abstract
Meiotic recombination ensures accurate chromosome segregation and results in genetic diversity in sexually reproducing eukaryotes. Over the last few decades, the genetic regulation of meiotic recombination has been extensively studied in many organisms. However, the role of endogenous meiocyte-specific small RNAs (ms-sRNAs; 21-24 nucleotide [nt]) and their involvement in meiotic recombination are unclear. Here, we sequenced the total small RNA (sRNA) and messenger RNA populations from meiocytes and leaves of wild type Arabidopsis (Arabidopsis thaliana) and meiocytes of spo11-1, a mutant defective in double-strand break formation, and we discovered 2,409 ms-sRNA clusters, 1,660 of which areSPORULATION 11-1 (AtSPO11-1)-dependent. Unlike mitotic small interfering RNAs that are enriched in intergenic regions and associated with gene silencing, ms-sRNAs are significantly enriched in genic regions and exhibit a positive correlation with genes that are preferentially expressed in meiocytes (i.e. Arabidopsis SKP1-LIKE1 and RAD51), in a fashion unrelated to DNA methylation. We also found that AtSPO11-1-dependent sRNAs have distinct characteristics compared with ms-sRNAs and tend to be associated with two known types of meiotic recombination hotspot motifs (i.e. CTT-repeat and A-rich motifs). These results reveal different meiotic and mitotic sRNA landscapes and provide new insights into how sRNAs relate to gene expression in meiocytes and meiotic recombination.
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Affiliation(s)
- Jiyue Huang
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center of Genetics and Development, Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200433, China
- University of North Carolina at Chapel Hill Department of Biology and the Integrative Program for Biological and Genome Sciences, Chapel Hill, North Carolina 27599-3280
| | - Cong Wang
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center of Genetics and Development, Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Haifeng Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Key Lab of Sugarcane Biology, College of Agriculture, Guangxi University, 530005, Nanning, Guangxi, China
| | - Pingli Lu
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center of Genetics and Development, Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Binglian Zheng
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center of Genetics and Development, Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Hong Ma
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center of Genetics and Development, Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200433, China
- Department of Biology, the Pennsylvania State University, University Park, Pennsylvania 16802
| | - Gregory P Copenhaver
- University of North Carolina at Chapel Hill Department of Biology and the Integrative Program for Biological and Genome Sciences, Chapel Hill, North Carolina 27599-3280
| | - Yingxiang Wang
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center of Genetics and Development, Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200433, China
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Rao V, Petla BP, Verma P, Salvi P, Kamble NU, Ghosh S, Kaur H, Saxena SC, Majee M. Arabidopsis SKP1-like protein13 (ASK13) positively regulates seed germination and seedling growth under abiotic stress. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:3899-3915. [PMID: 29788274 PMCID: PMC6054272 DOI: 10.1093/jxb/ery191] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 05/15/2018] [Indexed: 05/03/2023]
Abstract
SKP1 (S-phase kinase-associated protein1) proteins are key members of the SCF (SKP-cullin-F-box protein) E3 ligase complexes that ubiquitinate target proteins and play diverse roles in plant biology. However, in comparison with other members of the SCF complex, knowledge of SKP1-like proteins is very limited in plants. In the present work, we report that Arabidopsis SKP1-like protein13 (ASK13) is differentially regulated in different organs during seed development and germination and is up-regulated in response to abiotic stress. Yeast two-hybrid library screening and subsequent assessment of in vivo interactions through bimolecular fluorescence complementation analysis revealed that ASK13 not only interacts with F-box proteins but also with other proteins that are not components of SCF complexes. Biochemical analysis demonstrated that ASK13 not only exists as a monomer but also as a homo-oligomer or heteromer with other ASK proteins. Functional analysis using ASK13 overexpression and knockdown lines showed that ASK13 positively influences seed germination and seedling growth, particularly under abiotic stress. Taken together, our data strongly suggest that apart from participation to form SCF complexes, ASK13 interacts with several other proteins and is implicated in different cellular processes distinct from protein degradation.
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Affiliation(s)
- Venkateswara Rao
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, India
| | - Bhanu Prakash Petla
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, India
| | - Pooja Verma
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, India
| | - Prafull Salvi
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, India
| | - Nitin Uttam Kamble
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, India
| | - Shraboni Ghosh
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, India
| | - Harmeet Kaur
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, India
| | - Saurabh C Saxena
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, India
| | - Manoj Majee
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, India
- Correspondence:
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Regulation of SCF TIR1/AFBs E3 ligase assembly by S-nitrosylation of Arabidopsis SKP1-like1 impacts on auxin signaling. Redox Biol 2018; 18:200-210. [PMID: 30031268 PMCID: PMC6076216 DOI: 10.1016/j.redox.2018.07.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 06/26/2018] [Accepted: 07/05/2018] [Indexed: 12/22/2022] Open
Abstract
The F-box proteins (FBPs) TIR1/AFBs are the substrate recognition subunits of SKP1–cullin–F-box (SCF) ubiquitin ligase complexes and together with Aux/IAAs form the auxin co-receptor. Although tremendous knowledge on auxin perception and signaling has been gained in the last years, SCFTIR1/AFBs complex assembly and stabilization are emerging as new layers of regulation. Here, we investigated how nitric oxide (NO), through S-nitrosylation of ASK1 is involved in SCFTIR1/AFBs assembly. We demonstrate that ASK1 is S-nitrosylated and S-glutathionylated in cysteine (Cys) 37 and Cys118 residues in vitro. Both, in vitro and in vivo protein-protein interaction assays show that NO enhances ASK1 binding to CUL1 and TIR1/AFB2, required for SCFTIR1/AFB2 assembly. In addition, we demonstrate that Cys37 and Cys118 are essential residues for proper activation of auxin signaling pathway in planta. Phylogenetic analysis revealed that Cys37 residue is only conserved in SKP proteins in Angiosperms, suggesting that S-nitrosylation on Cys37 could represent an evolutionary adaption for SKP1 function in flowering plants. Collectively, these findings indicate that multiple events of redox modifications might be part of a fine-tuning regulation of SCFTIR1/AFBs for proper auxin signal transduction. ASK1 adaptor protein of the SCFTIR1/AFB E3 ligase complex is redox regulated. NO regulates ASK1 function by S-nitrosylation in Cys37 and Cys118 residues. NO enhances ASK1-CUL1 and ASK1-TIR1/AFB2 protein-protein interactions required for SCFTIR1/AFB2 assembly in vitro and in vivo. S-nitrosylated residues in ASK1 are essential for activation of auxin signaling pathway in plants.
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Chen Y, Chi Y, Meng Q, Wang X, Yu D. GmSK1, an SKP1 homologue in soybean, is involved in the tolerance to salt and drought. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 127:25-31. [PMID: 29544210 DOI: 10.1016/j.plaphy.2018.03.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Revised: 02/26/2018] [Accepted: 03/06/2018] [Indexed: 05/20/2023]
Abstract
In plants, various proteins are regulated by the ubiquitin-mediated system in response to different environmental stresses, such as drought, cold and heat. The Skp1-Cullin-F-box (SCF) complex, one of the multisubunit E3 ligases, has been shown to be involved in abiotic response pathways. In this study, Glycine max SKP1-like 1 (GmSK1), which had the typical characteristics of an SKP1 protein, with an alpha/beta structure, targeted to the cytoplasm and nucleus, was isolated from soybean [Glycine max (L.)]. GmSK1 was constitutively expressed in all the tested tissues, especially in the roots. Furthermore, the expression of GmSK1 was simultaneously induced by abscisic acid (ABA), jasmonic acid (JA), salicylic acid (SA), NaCl, low temperatures and drought, which suggests important roles for GmSK1 in plant responses to hormone treatments and abiotic stress. GmSK1-overexpressing transgenic tobacco (Nicotiana tobacum cv. Samsun) plants showed enhanced tolerance to high salinity and drought stress; exhibited significantly reduced inhibition of growth, greenness and water loss; and exhibited increased MDA accumulation compared with wild-type controls. Our results suggest that GmSK1 might play a role in the crosstalk between ubiquitination and abiotic stress responses in plants.
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Affiliation(s)
- Yanping Chen
- College of Life Sciences/National Center for Soybean Improvement/Nanjing Agricultural University, Nanjing, 210095, China; Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - Yingjun Chi
- College of Life Sciences/National Center for Soybean Improvement/Nanjing Agricultural University, Nanjing, 210095, China; College of Agro-grassland Science, Nanjing Agricultural University, Nanjing, 210095, China
| | - Qingchang Meng
- Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - Xiaolin Wang
- College of Life Sciences/National Center for Soybean Improvement/Nanjing Agricultural University, Nanjing, 210095, China
| | - Deyue Yu
- College of Life Sciences/National Center for Soybean Improvement/Nanjing Agricultural University, Nanjing, 210095, China.
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25
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Wang M, Xu Z, Kong Y. The tubby-like proteins kingdom in animals and plants. Gene 2018; 642:16-25. [DOI: 10.1016/j.gene.2017.10.077] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Revised: 08/15/2017] [Accepted: 10/27/2017] [Indexed: 11/28/2022]
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26
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Han Y, Zhao F, Gao S, Wang X, Wei A, Chen Z, Liu N, Tong X, Fu X, Wen C, Zhang Z, Wang N, Du S. Fine mapping of a male sterility gene ms-3 in a novel cucumber (Cucumis sativus L.) mutant. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2018; 131:449-460. [PMID: 29134240 PMCID: PMC5787221 DOI: 10.1007/s00122-017-3013-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 10/26/2017] [Indexed: 05/04/2023]
Abstract
The cucumber male sterility gene ms - 3 was fine mapped in a 76 kb region harboring an MMD1 -like gene Csa3M006660 that may be responsible for the male sterile in cucumber. A cucumber (Cucumis sativus L.) male sterile mutant (ms-3) in an advanced-generation inbred line was identified, and genetic analysis revealed that the male sterility trait was controlled by a recessive nuclear gene, ms-3, which was stably inherited. Histological studies suggested that the main cause of the male sterility was defective microsporogenesis, resulting in no tetrad or microspores being formed. Bulked segregant analysis (BSA) and genotyping of an F2 population of 2553 individuals were employed used to fine map ms-3, which was delimited to a 76 Kb region. In this region, a single non-synonymous SNP was found in the Csa3M006660 gene locus, which was predicted to result in an amino acid change. Quantitative RT-PCR analysis of Csa3M006660 was consistent with the fact that it plays a role in the early development of cucumber pollen. The protein encoded by Csa3M006660 is predicted to be homeodomain (PHD) finger protein, and the high degree of sequence conservation with homologs from a range of plant species further suggested the importance of the ms-3 non-synonymous mutation. The data presented here provide support for Csa3M006660 as the most likely candidate gene for Ms-3.
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Affiliation(s)
- Yike Han
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, College of Horticulture, China Agricultural University, Beijing, 100193, China
- State Key Laboratory of Vegetable Germplasm Innovation, Tianjin Key Laboratory of Vegetable Breeding Enterprise, Tianjin Kernel Cucumber Research Institute, Tianjin, 300192, China
| | - Fengyue Zhao
- College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Shang Gao
- College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Xianyun Wang
- College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Aimin Wei
- State Key Laboratory of Vegetable Germplasm Innovation, Tianjin Key Laboratory of Vegetable Breeding Enterprise, Tianjin Kernel Cucumber Research Institute, Tianjin, 300192, China
| | - Zhengwu Chen
- State Key Laboratory of Vegetable Germplasm Innovation, Tianjin Key Laboratory of Vegetable Breeding Enterprise, Tianjin Kernel Cucumber Research Institute, Tianjin, 300192, China
| | - Nan Liu
- State Key Laboratory of Vegetable Germplasm Innovation, Tianjin Key Laboratory of Vegetable Breeding Enterprise, Tianjin Kernel Cucumber Research Institute, Tianjin, 300192, China
| | - Xueqiang Tong
- College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Xinmeng Fu
- College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Changlong Wen
- Beijing Vegetable Research Center (BVRC), Beijing Academy of Agricultural and Forestry Sciences, Beijing Key Laboratory of Vegetable Germplasms Improvement, Beijing, 100097, China
| | - Zhenxian Zhang
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Ningning Wang
- College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Shengli Du
- State Key Laboratory of Vegetable Germplasm Innovation, Tianjin Key Laboratory of Vegetable Breeding Enterprise, Tianjin Kernel Cucumber Research Institute, Tianjin, 300192, China.
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Yuan TL, Huang WJ, He J, Zhang D, Tang WH. Stage-Specific Gene Profiling of Germinal Cells Helps Delineate the Mitosis/Meiosis Transition. PLANT PHYSIOLOGY 2018; 176:1610-1626. [PMID: 29187566 PMCID: PMC5813559 DOI: 10.1104/pp.17.01483] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 11/26/2017] [Indexed: 05/11/2023]
Abstract
In flowering plants, germ lines are induced from somatic meristems within reproductive organs. Within anthers, germinal cell initials first undergo several rounds of mitotic proliferation before synchronously entering meiosis. Our understanding of the progression and the molecular basis of this mitosis to meiosis transition is still limited. Taking advantage of the correlation between anther length and premeiotic germinal cell development in maize (Zea mays), we studied the transcriptome dynamics of germinal cells at three sequential stages, mitotic archesporial cells, enlarging pollen mother cells at the premeiosis interphase, and pollen mother cells at the early prophase of meiosis, using laser microdissection-based expression profiling. Our analysis showed that cells undergoing the mitosis-meiosis switch exhibit robust transcriptional changes. The three stages are distinguished by the expression of genes encoding transcription factor subsets, meiotic chromosome recombination proteins, and distinct E3 ubiquitin ligases, respectively. The transcription level of genes encoding protein turnover machinery was significantly higher in these three stages of germinal cells than in mature pollen, parenchyma cells, or seedlings. Our experimental results further indicate that many meiotic genes are not only transcribed, but also translated prior to meiosis. We suggest that the enlarging pollen mother cells stage represents a crucial turning point from mitosis to meiosis for developing germinal cells.
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Affiliation(s)
- Ting-Lu Yuan
- National Key Laboratory of Plant Molecular Genetics, Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Wei-Jie Huang
- National Key Laboratory of Plant Molecular Genetics, Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China
- University of Chinese Academy of Sciences, Shanghai 200032, China
| | - Juan He
- National Key Laboratory of Plant Molecular Genetics, Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China
- University of Chinese Academy of Sciences, Shanghai 200032, China
| | - Dong Zhang
- National Key Laboratory of Plant Molecular Genetics, Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Wei-Hua Tang
- National Key Laboratory of Plant Molecular Genetics, Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China
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Zhang F, Tang D, Shen Y, Xue Z, Shi W, Ren L, Du G, Li Y, Cheng Z. The F-Box Protein ZYGO1 Mediates Bouquet Formation to Promote Homologous Pairing, Synapsis, and Recombination in Rice Meiosis. THE PLANT CELL 2017; 29:2597-2609. [PMID: 28939596 PMCID: PMC5774573 DOI: 10.1105/tpc.17.00287] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 07/18/2017] [Accepted: 09/20/2017] [Indexed: 05/18/2023]
Abstract
Telomere bouquet formation, a highly conserved meiotic event, plays an important role in homologous pairing and therefore progression of meiosis; however, the underlying molecular mechanism remains largely unknown. Here, we identified ZYGOTENE1 (ZYGO1), a novel F-box protein in rice (Oryza sativa), and verified its essential role in bouquet formation during early meiosis. In zygo1 mutants, zygotene chromosome aggregation and telomere clustering failed to occur. The suppressed telomere clustering in homologous pairing aberration in rice meiosis1 (pair1) zygo1 and rice completion of meiotic recombination (Oscom1) zygo1 double mutants, together with the altered localization of OsSAD1 (a SUN protein associated with the nuclear envelope) in zygo1, showed that ZYGO1 has a significant function in bouquet formation. In addition, the interaction between ZYGO1 and rice SKP1-like protein 1 suggested that ZYGO1 might modulate bouquet formation as a component of the SKP1-Cullin1-F-box complex. Although double-strand break formation and early recombination element installation occurred normally, zygo1 mutants showed defects in full-length pairing and synaptonemal complex assembly. Furthermore, crossover (CO) formation was disturbed, and foci of Human enhancer of invasion 10 were restricted to the partially synapsed chromosome regions, indicating that CO reduction might be caused by the failure of full-length chromosome alignment in zygo1 Therefore, we propose that ZYGO1 mediates bouquet formation to efficiently promote homolog pairing, synapsis, and CO formation in rice meiosis.
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Affiliation(s)
- Fanfan Zhang
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ding Tang
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yi Shen
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Zhihui Xue
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Wenqing Shi
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lijun Ren
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guijie Du
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yafei Li
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhukuan Cheng
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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Tang Q, Zang G, Cheng C, Luan M, Dai Z, Xu Y, Yang Z, Zhao L, Su J. Diplosporous development in Boehmeria tricuspis: Insights from de novo transcriptome assembly and comprehensive expression profiling. Sci Rep 2017; 7:46043. [PMID: 28382950 PMCID: PMC5382578 DOI: 10.1038/srep46043] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 03/07/2017] [Indexed: 01/05/2023] Open
Abstract
Boehmeria tricuspis includes sexually reproducing diploid and apomictic triploid individuals. Previously, we established that triploid B. tricuspis reproduces through obligate diplospory. To understand the molecular basis of apomictic development in B. tricuspis, we sequenced and compared transcriptomic profiles of the flowers of sexual and apomictic plants at four key developmental stages. A total of 283,341 unique transcripts were obtained from 1,463 million high-quality paired-end reads. In total, 18,899 unigenes were differentially expressed between the reproductive types at the four stages. By classifying the transcripts into gene ontology categories of differentially expressed genes, we showed that differential plant hormone signal transduction, cell cycle regulation, and transcription factor regulation are possibly involved in apomictic development and/or a polyploidization response in B. tricuspis. Furthermore, we suggest that specific gene families are possibly related to apomixis and might have important effects on diplosporous floral development. These results make a notable contribution to our understanding of the molecular basis of diplosporous development in B. tricuspis.
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Affiliation(s)
- Qing Tang
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, 348 West Xianjiahu Road, Changsha, Hunan, China
| | - Gonggu Zang
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, 348 West Xianjiahu Road, Changsha, Hunan, China
| | - Chaohua Cheng
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, 348 West Xianjiahu Road, Changsha, Hunan, China
| | - Mingbao Luan
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, 348 West Xianjiahu Road, Changsha, Hunan, China
| | - Zhigang Dai
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, 348 West Xianjiahu Road, Changsha, Hunan, China
| | - Ying Xu
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, 348 West Xianjiahu Road, Changsha, Hunan, China
| | - Zemao Yang
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, 348 West Xianjiahu Road, Changsha, Hunan, China
| | - Lining Zhao
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, 348 West Xianjiahu Road, Changsha, Hunan, China
| | - Jianguang Su
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, 348 West Xianjiahu Road, Changsha, Hunan, China
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30
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Hao Q, Ren H, Zhu J, Wang L, Huang S, Liu Z, Gao Z, Shu Q. Overexpression of PSK1, a SKP1-like gene homologue, from Paeonia suffruticosa, confers salinity tolerance in Arabidopsis. PLANT CELL REPORTS 2017; 36:151-162. [PMID: 27787596 DOI: 10.1007/s00299-016-2066-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 10/18/2016] [Indexed: 05/25/2023]
Abstract
Our study is the first to demonstrate that PSK1 , a SKP1 -like gene homologue, is involved in salinity tolerance. Our functional characterization of PSK1 provides new insights into tree peony development. A homologous gene of S-phase kinase-associated protein1 (SKP1) was cloned from tree peony (Paeonia suffruticosa) and denoted as PSK1. The 462-bp open reading frame of PSK1 was predicted to encode a protein comprising 153 amino acids, with a molecular mass of 17 kDa. The full-length gene was 1,634 bp long and included a large 904-bp intron. PSK1 transcription was detected in all tissues, with the highest level observed in sepals, followed by leaves. Under salinity stress, overexpression of PSK1 in Arabidopsis resulted in increased germination percentages, cotyledon greening, and fresh weights relative to wild-type plants. Furthermore, transgenic Arabidopsis lines containing 35S::PSK1 displayed increased expression of genes that would be essential for reproduction and growth under salinity stress: ASK1, LEAFY, FT, and CO involved in flower development and flowering time as well as P5CS, RAB18, DREB, and SOD1-3 contributing to salinity tolerance. Our functional characterization of PSK1 adds to global knowledge of the multiple functions of previously explored SKP1-like genes in plants and sheds light on the molecular mechanism underlying its role in salinity tolerance. Our findings also provide information on the function and molecular mechanism of PSK1 in tree peony flower development, thereby revealing a theoretical basis for regulation of flowering and conferral of salinity tolerance in tree peony.
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Affiliation(s)
- Qing Hao
- Landscape and Forestry College, Qingdao Agricultural University, Qingdao, 266109, China
| | - Hongxu Ren
- Key Laboratory of Plant Resources/Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Jin Zhu
- Key Laboratory of Plant Resources/Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Liangsheng Wang
- Key Laboratory of Plant Resources/Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Shouchen Huang
- Landscape and Forestry College, Qingdao Agricultural University, Qingdao, 266109, China
| | - Zheng'an Liu
- Key Laboratory of Plant Resources/Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Zhimin Gao
- International Center for Bamboo and Rattan, Key Laboratory on the Science and Technology of Bamboo and Rattan, Beijing, 100102, China.
| | - Qingyan Shu
- Key Laboratory of Plant Resources/Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
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He Y, Wang C, Higgins JD, Yu J, Zong J, Lu P, Zhang D, Liang W. MEIOTIC F-BOX Is Essential for Male Meiotic DNA Double-Strand Break Repair in Rice. THE PLANT CELL 2016; 28:1879-93. [PMID: 27436711 PMCID: PMC5006700 DOI: 10.1105/tpc.16.00108] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 05/31/2016] [Accepted: 07/18/2016] [Indexed: 05/21/2023]
Abstract
F-box proteins constitute a large superfamily in plants and play important roles in controlling many biological processes, but the roles of F-box proteins in male meiosis in plants remain unclear. Here, we identify the rice (Oryza sativa) F-box gene MEIOTIC F-BOX (MOF), which is essential for male meiotic progression. MOF belongs to the FBX subfamily and is predominantly active during leptotene to pachytene of prophase I. mof meiocytes display disrupted telomere bouquet formation, impaired pairing and synapsis of homologous chromosomes, and arrested meiocytes at late prophase I, followed by apoptosis. Although normal, programmed double-stranded DNA breaks (DSBs) form in mof mutants, foci of the phosphorylated histone variant γH2AX, a marker for DSBs, persist in the mutant, indicating that many of the DSBs remained unrepaired. The recruitment of Completion of meiosis I (COM1) and Radiation sensitive51C (RAD51C) to DSBs is severely compromised in mutant meiocytes, indicating that MOF is crucial for DSB end-processing and repair. Further analyses showed that MOF could physically interact with the rice SKP1-like Protein1 (OSK1), indicating that MOF functions as a component of the SCF E3 ligase to regulate meiotic progression in rice. Thus, this study reveals the essential role of an F-box protein in plant meiosis and provides helpful information for elucidating the roles of the ubiquitin proteasome system in plant meiotic progression.
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Affiliation(s)
- Yi He
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 20040, China
| | - Chong Wang
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 20040, China
| | - James D Higgins
- Department of Genetics, University of Leicester, Leicester LE1 7RH, United Kingdom
| | - Junping Yu
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 20040, China
| | - Jie Zong
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 20040, China
| | - Pingli Lu
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center of Genetics and Development, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Dabing Zhang
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 20040, China School of Agriculture, Food and Wine, University of Adelaide, Urrbrae, South Australia 5064, Australia
| | - Wanqi Liang
- Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 20040, China
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Liu L, Venkatesh J, Jo YD, Koeda S, Hosokawa M, Kang JH, Goritschnig S, Kang BC. Fine mapping and identification of candidate genes for the sy-2 locus in a temperature-sensitive chili pepper (Capsicum chinense). TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2016; 129:1541-56. [PMID: 27147070 DOI: 10.1007/s00122-016-2723-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 04/22/2016] [Indexed: 05/24/2023]
Abstract
The sy - 2 temperature-sensitive gene from Capsicum chinense was fine mapped to a 138.8-kb region at the distal portion of pepper chromosome 1. Based on expression analyses, two putative F-box genes were identified as sy - 2 candidate genes. Seychelles-2 ('sy-2') is a temperature-sensitive natural mutant of Capsicum chinense, which exhibits an abnormal leaf phenotype when grown at temperatures below 24 °C. We previously showed that the sy-2 phenotype is controlled by a single recessive gene, sy-2, located on pepper chromosome 1. In this study, a high-resolution genetic and physical map for the sy-2 locus was constructed using two individual F2 mapping populations derived from a cross between C. chinense mutant 'sy-2' and wild-type 'No. 3341'. The sy-2 gene was fine mapped to a 138.8-kb region between markers SNP 5-5 and SNP 3-8 at the distal portion of chromosome 1, based on comparative genomic analysis and genomic information from pepper. The sy-2 target region was predicted to contain 27 genes. Expression analysis of these predicted genes showed a differential expression pattern for ORF10 and ORF20 between mutant and wild-type plants; with both having significantly lower expression in 'sy-2' than in wild-type plants. In addition, the coding sequences of both ORF10 and ORF20 contained single nucleotide polymorphisms (SNPs) causing amino acid changes, which may have important functional consequences. ORF10 and ORF20 are predicted to encode F-box proteins, which are components of the SCF complex. Based on the differential expression pattern and the presence of nonsynonymous SNPs, we suggest that these two putative F-box genes are most likely responsible for the temperature-sensitive phenotypes in pepper. Further investigation of these genes may enable a better understanding of the molecular mechanisms of low temperature sensitivity in plants.
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Affiliation(s)
- Li Liu
- Department of Plant Science and Plant Genomics and Breeding Institute, Seoul National University, Seoul, 151-921, Korea
| | - Jelli Venkatesh
- Department of Plant Science and Plant Genomics and Breeding Institute, Seoul National University, Seoul, 151-921, Korea
| | - Yeong Deuk Jo
- Department of Plant Science and Plant Genomics and Breeding Institute, Seoul National University, Seoul, 151-921, Korea
| | - Sota Koeda
- Department of Agronomy and Horticultural Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Munetaka Hosokawa
- Department of Agronomy and Horticultural Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Jin-Ho Kang
- Crop Biotechnology Institute/GreenBio Science and Technology, Seoul National University, Pyeongchang, 232-916, Korea
| | | | - Byoung-Cheorl Kang
- Department of Plant Science and Plant Genomics and Breeding Institute, Seoul National University, Seoul, 151-921, Korea.
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Takáč T, Vadovič P, Pechan T, Luptovčiak I, Šamajová O, Šamaj J. Comparative proteomic study of Arabidopsis mutants mpk4 and mpk6. Sci Rep 2016; 6:28306. [PMID: 27324189 PMCID: PMC4915016 DOI: 10.1038/srep28306] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 06/02/2016] [Indexed: 01/24/2023] Open
Abstract
Arabidopsis MPK4 and MPK6 are implicated in different signalling pathways responding to diverse external stimuli. This was recently correlated with transcriptomic profiles of Arabidopsis mpk4 and mpk6 mutants, and thus it should be reflected also on the level of constitutive proteomes. Therefore, we performed a shot gun comparative proteomic analysis of Arabidopsis mpk4 and mpk6 mutant roots. We have used bioinformatic tools and propose several new proteins as putative MPK4 and MPK6 phosphorylation targets. Among these proteins in the mpk6 mutant were important modulators of development such as CDC48A and phospholipase D alpha 1. In the case of the mpk4 mutant transcriptional reprogramming might be mediated by phosphorylation and change in the abundance of mRNA decapping complex VCS. Further comparison of mpk4 and mpk6 root differential proteomes showed differences in the composition and regulation of defense related proteins. The mpk4 mutant showed altered abundances of antioxidant proteins. The examination of catalase activity in response to oxidative stress revealed that this enzyme might be preferentially regulated by MPK4. Finally, we proposed developmentally important proteins as either directly or indirectly regulated by MPK4 and MPK6. These proteins contribute to known phenotypic defects in the mpk4 and mpk6 mutants.
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Affiliation(s)
- Tomáš Takáč
- Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Pavol Vadovič
- Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Tibor Pechan
- Institute for Genomics, Biocomputing &Biotechnology, Mississippi Agricultural and Forestry Experiment Station, Mississippi State University, MS 39759, USA
| | - Ivan Luptovčiak
- Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Olga Šamajová
- Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Jozef Šamaj
- Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
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Lu D, Ni W, Stanley BA, Ma H. Proteomics and transcriptomics analyses of Arabidopsis floral buds uncover important functions of ARABIDOPSIS SKP1-LIKE1. BMC PLANT BIOLOGY 2016; 16:61. [PMID: 26940208 PMCID: PMC4778361 DOI: 10.1186/s12870-015-0571-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Accepted: 07/04/2015] [Indexed: 05/09/2023]
Abstract
BACKGROUND The ARABIDOPSIS SKP1-LIKE1 (ASK1) protein functions as a subunit of SKP1-CUL1-F-box (SCF) E3 ubiquitin ligases. Previous genetic studies showed that ASK1 plays important roles in Arabidopsis flower development and male meiosis. However, the molecular impact of ASK1-containing SCF E3 ubiquitin ligases (ASK1-E3s) on the floral proteome and transcriptome is unknown. RESULTS Here we identified proteins that are potentially regulated by ASK1-E3s by comparing floral bud proteomes of wild-type and the ask1 mutant plants. More than 200 proteins were detected in the ask1 mutant but not in wild-type and >300 were detected at higher levels in the ask1 mutant than in wild-type, but their RNA levels were not significantly different between wild-type and ask1 floral buds as shown by transcriptomics analysis, suggesting that they are likely regulated at the protein level by ASK1-E3s. Integrated analyses of floral proteomics and transcriptomics of ask1 and wild-type uncovered several potential aspects of ASK1-E3 functions, including regulation of transcription regulators, kinases, peptidases, and ribosomal proteins, with implications on possible mechanisms of ASK1-E3 functions in floral development. CONCLUSIONS Our results suggested that ASK1-E3s play important roles in Arabidopsis protein degradation during flower development. This study opens up new possibilities for further functional studies of these candidate E3 substrates.
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Affiliation(s)
- Dihong Lu
- Intercollege Graduate Degree Program in Plant Biology, the Huck Institutes of the Life Sciences, the Pennsylvania State University, University Park, PA, 16802, USA.
| | - Weimin Ni
- Department of Biology, the Pennsylvania State University, University Park, PA, 16802, USA.
- Current address: Department of Plant and Microbial Biology, University of California, Berkeley, CA, 94720, USA.
| | - Bruce A Stanley
- Section of Research Resources, Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA.
| | - Hong Ma
- State Key Laboratory of Genetic Engineering and Institute of Plant Biology, Center for Evolutionary Biology, School of Life Sciences, Fudan University, Shanghai, 200433, China.
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Li S, Chen L, Zhang L, Li X, Liu Y, Wu Z, Dong F, Wan L, Liu K, Hong D, Yang G. BnaC9.SMG7b Functions as a Positive Regulator of the Number of Seeds per Silique in Brassica napus by Regulating the Formation of Functional Female Gametophytes. PLANT PHYSIOLOGY 2015; 169:2744-60. [PMID: 26494121 PMCID: PMC4677898 DOI: 10.1104/pp.15.01040] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 10/21/2015] [Indexed: 05/02/2023]
Abstract
Number of seeds per silique (NSS) is an important determinant of seed yield potential in Brassicaceae crops, and it is controlled by naturally occurring quantitative trait loci. We previously mapped a major quantitative trait locus, qSS.C9, on the C9 chromosome that controls NSS in Brassica napus. To gain a better understanding of how qSS.C9 controls NSS in B. napus, we isolated this locus through a map-based cloning strategy. qSS.C9 encodes a predicted small protein with 119 amino acids, designated as BnaC9.SMG7b, that shows homology with the Ever ShorterTelomere1 tertratricopeptide repeats and Ever Shorter Telomere central domains of Arabidopsis (Arabidopsis thaliana) SUPPRESSOR WITH MORPHOGENETIC EFFECTS ON GENITALIA7 (SMG7). BnaC9.SMG7b plays a role in regulating the formation of functional female gametophyte, thus determining the formation of functional megaspores and then mature ovules. Natural loss or artificial knockdown of BnaC9.SMG7b significantly reduces the number of functional ovules per silique and thus, results in decreased seed number, indicating that qSS.C9 is a positive regulator of NSS in B. napus. Sequence and function analyses show that BnaC9.SMG7b experiences a subfunctionalization process that causes loss of function in nonsense-mediated mRNA decay, such as in Arabidopsis SMG7. Haplotype analysis in 84 accessions showed that the favorable BnaC9.SMG7b alleles are prevalent in modern B. napus germplasms, suggesting that this locus has been a major selection target of B. napus improvement. Our results represent the first step toward unraveling the molecular mechanism that controls the natural variation of NSS in B. napus.
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Affiliation(s)
- Shipeng Li
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China (S.L., L.C., L.Z., X.L., Y.L., Z.W., F.D., L.W., K.L., D.H., G.Y.); andCollege of Crop Science, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China (L.Z.)
| | - Lei Chen
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China (S.L., L.C., L.Z., X.L., Y.L., Z.W., F.D., L.W., K.L., D.H., G.Y.); andCollege of Crop Science, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China (L.Z.)
| | - Liwu Zhang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China (S.L., L.C., L.Z., X.L., Y.L., Z.W., F.D., L.W., K.L., D.H., G.Y.); andCollege of Crop Science, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China (L.Z.)
| | - Xi Li
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China (S.L., L.C., L.Z., X.L., Y.L., Z.W., F.D., L.W., K.L., D.H., G.Y.); andCollege of Crop Science, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China (L.Z.)
| | - Ying Liu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China (S.L., L.C., L.Z., X.L., Y.L., Z.W., F.D., L.W., K.L., D.H., G.Y.); andCollege of Crop Science, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China (L.Z.)
| | - Zhikun Wu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China (S.L., L.C., L.Z., X.L., Y.L., Z.W., F.D., L.W., K.L., D.H., G.Y.); andCollege of Crop Science, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China (L.Z.)
| | - Faming Dong
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China (S.L., L.C., L.Z., X.L., Y.L., Z.W., F.D., L.W., K.L., D.H., G.Y.); andCollege of Crop Science, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China (L.Z.)
| | - Lili Wan
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China (S.L., L.C., L.Z., X.L., Y.L., Z.W., F.D., L.W., K.L., D.H., G.Y.); andCollege of Crop Science, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China (L.Z.)
| | - Kede Liu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China (S.L., L.C., L.Z., X.L., Y.L., Z.W., F.D., L.W., K.L., D.H., G.Y.); andCollege of Crop Science, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China (L.Z.)
| | - Dengfeng Hong
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China (S.L., L.C., L.Z., X.L., Y.L., Z.W., F.D., L.W., K.L., D.H., G.Y.); andCollege of Crop Science, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China (L.Z.)
| | - Guangsheng Yang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China (S.L., L.C., L.Z., X.L., Y.L., Z.W., F.D., L.W., K.L., D.H., G.Y.); andCollege of Crop Science, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China (L.Z.)
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Li P, Miao H, Ma Y, Wang L, Hu G, Ye Z, Zhao J, Qin Y. CrWSKP1, an SKP1-like Gene, Is Involved in the Self-Incompatibility Reaction of "Wuzishatangju" (Citrus reticulata Blanco). Int J Mol Sci 2015; 16:21695-710. [PMID: 26370985 PMCID: PMC4613275 DOI: 10.3390/ijms160921695] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 08/23/2015] [Accepted: 08/25/2015] [Indexed: 11/17/2022] Open
Abstract
Plant S-phase kinase-associated protein 1 (SKP1) genes play crucial roles in plant development and differentiation. However, the role of SKP1 in citrus is unclear. Herein, we described a novel SKP1-like gene, designated as CrWSKP1, from "Wuzishatangju" (Citrus reticulata Blanco). The cDNA sequence of CrWSKP1 is 779 base pairs (bp) and contains an open reading frame (ORF) of 477 bp. The genomic sequence of the CrWSKP1 gene is 1296 bp with two exons and one intron. CrWSKP1 has high identity with SKP1-like genes from other plant species within two conserved regions. Approximately 85% of pollen tubes of self-pollinated CrWSKP1 transgenic tobaccos became twisted at four days after self-pollination. Pollen tube numbers of self-pollinated CrWSKP1 transformants entering into ovules were significantly fewer than that of the control. Seed number of self-pollinated CrWSKP1 transformants was significantly reduced. These results suggested that the CrWSKP1 is involved in the self-incompatibility (SI) reaction of "Wuzishatangju".
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Affiliation(s)
- Peng Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources/ Key Laboratory of Biology and Genetic Improvement of Horticultural Crops-South China, Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Hongxia Miao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources/ Key Laboratory of Biology and Genetic Improvement of Horticultural Crops-South China, Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Tropical Crop Bioscience and Biotechnology, Ministry of Agriculture, Haikou 571101, China.
| | - Yuewen Ma
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources/ Key Laboratory of Biology and Genetic Improvement of Horticultural Crops-South China, Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Lu Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources/ Key Laboratory of Biology and Genetic Improvement of Horticultural Crops-South China, Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Guibing Hu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources/ Key Laboratory of Biology and Genetic Improvement of Horticultural Crops-South China, Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Zixing Ye
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources/ Key Laboratory of Biology and Genetic Improvement of Horticultural Crops-South China, Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Jietang Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources/ Key Laboratory of Biology and Genetic Improvement of Horticultural Crops-South China, Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Yonghua Qin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources/ Key Laboratory of Biology and Genetic Improvement of Horticultural Crops-South China, Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
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Organelles maintain spindle position in plant meiosis. Nat Commun 2015; 6:6492. [DOI: 10.1038/ncomms7492] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Accepted: 02/03/2015] [Indexed: 11/08/2022] Open
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Sweigart AL, Flagel LE. Evidence of natural selection acting on a polymorphic hybrid incompatibility locus in Mimulus. Genetics 2015; 199:543-54. [PMID: 25428983 PMCID: PMC4317661 DOI: 10.1534/genetics.114.171819] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Accepted: 11/18/2014] [Indexed: 12/30/2022] Open
Abstract
As a common cause of reproductive isolation in diverse taxa, hybrid incompatibilities are fundamentally important to speciation. A key question is which evolutionary forces drive the initial substitutions within species that lead to hybrid dysfunction. Previously, we discovered a simple genetic incompatibility that causes nearly complete male sterility and partial female sterility in hybrids between the two closely related yellow monkeyflower species Mimulus guttatus and M. nasutus. In this report, we fine map the two major incompatibility loci-hybrid male sterility 1 (hms1) and hybrid male sterility 2 (hms2)-to small nuclear genomic regions (each <70 kb) that include strong candidate genes. With this improved genetic resolution, we also investigate the evolutionary dynamics of hms1 in a natural population of M. guttatus known to be polymorphic at this locus. Using classical genetic crosses and population genomics, we show that a 320-kb region containing the hms1 incompatibility allele has risen to intermediate frequency in this population by strong natural selection. This finding provides direct evidence that natural selection within plant species can lead to hybrid dysfunction between species.
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Affiliation(s)
- Andrea L Sweigart
- Department of Genetics, University of Georgia, Athens, Georgia 30602
| | - Lex E Flagel
- Department of Biology, Duke University, Durham, North Carolina 27708 Department of Plant Biology, University of Minnesota, St. Paul, Minnesota 55108
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Roitinger E, Hofer M, Köcher T, Pichler P, Novatchkova M, Yang J, Schlögelhofer P, Mechtler K. Quantitative phosphoproteomics of the ataxia telangiectasia-mutated (ATM) and ataxia telangiectasia-mutated and rad3-related (ATR) dependent DNA damage response in Arabidopsis thaliana. Mol Cell Proteomics 2015; 14:556-71. [PMID: 25561503 PMCID: PMC4349977 DOI: 10.1074/mcp.m114.040352] [Citation(s) in RCA: 163] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The reversible phosphorylation of proteins on serine, threonine, and tyrosine residues is an important biological regulatory mechanism. In the context of genome integrity, signaling cascades driven by phosphorylation are crucial for the coordination and regulation of DNA repair. The two serine/threonine protein kinases ataxia telangiectasia-mutated (ATM) and Ataxia telangiectasia-mutated and Rad3-related (ATR) are key factors in this process, each specific for different kinds of DNA lesions. They are conserved across eukaryotes, mediating the activation of cell-cycle checkpoints, chromatin modifications, and regulation of DNA repair proteins. We designed a novel mass spectrometry-based phosphoproteomics approach to study DNA damage repair in Arabidopsis thaliana. The protocol combines filter aided sample preparation, immobilized metal affinity chromatography, metal oxide affinity chromatography, and strong cation exchange chromatography for phosphopeptide generation, enrichment, and separation. Isobaric labeling employing iTRAQ (isobaric tags for relative and absolute quantitation) was used for profiling the phosphoproteome of atm atr double mutants and wild type plants under either regular growth conditions or challenged by irradiation. A total of 10,831 proteins were identified and 15,445 unique phosphopeptides were quantified, containing 134 up- and 38 down-regulated ATM/ATR dependent phosphopeptides. We identified known and novel ATM/ATR targets such as LIG4 and MRE11 (needed for resistance against ionizing radiation), PIE1 and SDG26 (implicated in chromatin remodeling), PCNA1, WAPL, and PDS5 (implicated in DNA replication), and ASK1 and HTA10 (involved in meiosis).
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Affiliation(s)
- Elisabeth Roitinger
- From the ‡Institute of Molecular Pathology (IMP), Vienna, Austria; ¶Institute of Molecular Biotechnology (IMBA), Vienna, Austria
| | - Manuel Hofer
- §Department of Chromosome Biology, Max F. Perutz Laboratories, University of Vienna, Vienna, Austria
| | - Thomas Köcher
- From the ‡Institute of Molecular Pathology (IMP), Vienna, Austria
| | - Peter Pichler
- From the ‡Institute of Molecular Pathology (IMP), Vienna, Austria; ¶Institute of Molecular Biotechnology (IMBA), Vienna, Austria
| | - Maria Novatchkova
- From the ‡Institute of Molecular Pathology (IMP), Vienna, Austria; ¶Institute of Molecular Biotechnology (IMBA), Vienna, Austria
| | - Jianhua Yang
- ‖School of Biosciences, University of Birmingham, Edgbaston, Birmingham, UK
| | - Peter Schlögelhofer
- §Department of Chromosome Biology, Max F. Perutz Laboratories, University of Vienna, Vienna, Austria;
| | - Karl Mechtler
- From the ‡Institute of Molecular Pathology (IMP), Vienna, Austria; ¶Institute of Molecular Biotechnology (IMBA), Vienna, Austria;
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Li H, Meng F, Guo C, Wang Y, Xie X, Zhu T, Zhou S, Ma H, Shan H, Kong H. MeioBase: a comprehensive database for meiosis. FRONTIERS IN PLANT SCIENCE 2014; 5:728. [PMID: 25566299 PMCID: PMC4267189 DOI: 10.3389/fpls.2014.00728] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 12/01/2014] [Indexed: 06/04/2023]
Abstract
Meiosis is a special type of cell division process necessary for the sexual reproduction of all eukaryotes. The ever expanding meiosis research calls for an effective and specialized database that is not readily available yet. To fill this gap, we have developed a knowledge database MeioBase (http://meiosis.ibcas.ac.cn), which is comprised of two core parts, Resources and Tools. In the Resources part, a wealth of meiosis data collected by curation and manual review from published literatures and biological databases are integrated and organized into various sections, such as Cytology, Pathway, Species, Interaction, and Expression. In the Tools part, some useful tools have been integrated into MeioBase, such as Search, Download, Blast, Comparison, My Favorites, Submission, and Advice. With a simplified and efficient web interface, users are able to search against the database with gene model IDs or keywords, and batch download the data for local investigation. We believe that MeioBase can greatly facilitate the researches related to meiosis.
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Affiliation(s)
- Hao Li
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of SciencesBeijing, China
- University of Chinese Academy of SciencesBeijing, China
| | - Fanrui Meng
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of SciencesBeijing, China
- University of Chinese Academy of SciencesBeijing, China
| | - Chunce Guo
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of SciencesBeijing, China
| | - Yingxiang Wang
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, Institute of Biodiversity Science, Center for Evolutionary Biology, School of Life Sciences, Fudan UniversityShanghai, China
| | - Xiaojing Xie
- Shanghai Key Lab of Intelligent Information Processing and School of Computer Science, Fudan UniversityShanghai, China
| | - Tiansheng Zhu
- Shanghai Key Lab of Intelligent Information Processing and School of Computer Science, Fudan UniversityShanghai, China
| | - Shuigeng Zhou
- Shanghai Key Lab of Intelligent Information Processing and School of Computer Science, Fudan UniversityShanghai, China
| | - Hong Ma
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, Institute of Biodiversity Science, Center for Evolutionary Biology, School of Life Sciences, Fudan UniversityShanghai, China
- Institutes of Biomedical Sciences, Fudan UniversityShanghai, China
| | - Hongyan Shan
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of SciencesBeijing, China
| | - Hongzhi Kong
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of SciencesBeijing, China
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Wang Y, Yang M. Loss-of-function mutants and overexpression lines of the Arabidopsis cyclin CYCA1;2/Tardy Asynchronous Meiosis exhibit different defects in prophase-i meiocytes but produce the same meiotic products. PLoS One 2014; 9:e113348. [PMID: 25402453 PMCID: PMC4234643 DOI: 10.1371/journal.pone.0113348] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Accepted: 10/23/2014] [Indexed: 11/19/2022] Open
Abstract
In Arabidopsis, loss-of-function mutations in the A-type cyclin CYCA1;2/TARDY ASYNCHRONOUS MEIOSIS (TAM) gene lead to the production of abnormal meiotic products including triads and dyads. Here we report that overexpression of TAM by the ASK1:TAM transgene also led to the production of triads and dyads in meiosis, as well as shriveled seeds, in a dominant fashion. However, the partial loss-of-function mutant tam-1, an ASK1:TAM line, and the wild type differed in dynamic changes in chromosome thread thickness from zygotene to diplotene. We also found that the pericentromeric heterochromatin regions in male meiocytes in tam-1 and tam-2 (a null allele) frequently formed a tight cluster at the pachytene and diplotene stages, in contrast to the infrequent occurrences of such clusters in the wild type and the ASK1:TAM line. Immunolocalization studies of the chromosome axial component ASY1 revealed that ASY1 was highly expressed at the appropriate male meiotic stages but not localized to the chromosomes in tam-2. The level of ASY1, however, was greatly reduced in another ASK1:TAM line with much overexpressed TAM. Our results indicate that the reduction and increase in the activity of TAM differentially affect chromosomal morphology and the action of ASY1 in prophase I. Based on these results, we propose that either the different meiotic defects or a common defect such as missing ASY1 on the chromosomal axes triggers a hitherto uncharacterized cell cycle checkpoint in the male meiocytes in the tam mutants and ASK1:TAM lines, leading to the production of the same abnormal meiotic products.
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Affiliation(s)
- Yixing Wang
- Department of Botany, Oklahoma State University, Stillwater, Oklahoma, United States of America
| | - Ming Yang
- Department of Botany, Oklahoma State University, Stillwater, Oklahoma, United States of America
- * E-mail:
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Zhao L, He J, Cai H, Lin H, Li Y, Liu R, Yang Z, Qin Y. Comparative expression profiling reveals gene functions in female meiosis and gametophyte development in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2014; 80:615-28. [PMID: 25182975 PMCID: PMC7494246 DOI: 10.1111/tpj.12657] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 08/19/2014] [Accepted: 08/22/2014] [Indexed: 05/03/2023]
Abstract
Megasporogenesis is essential for female fertility, and requires the accomplishment of meiosis and the formation of functional megaspores. The inaccessibility and low abundance of female meiocytes make it particularly difficult to elucidate the molecular basis underlying megasporogenesis. We used high-throughput tag-sequencing analysis to identify genes expressed in female meiocytes (FMs) by comparing gene expression profiles from wild-type ovules undergoing megasporogenesis with those from the spl mutant ovules, which lack megasporogenesis. A total of 862 genes were identified as FMs, with levels that are consistently reduced in spl ovules in two biological replicates. Fluorescence-assisted cell sorting followed by RNA-seq analysis of DMC1:GFP-labeled female meiocytes confirmed that 90% of the FMs are indeed detected in the female meiocyte protoplast profiling. We performed reverse genetic analysis of 120 candidate genes and identified four FM genes with a function in female meiosis progression in Arabidopsis. We further revealed that KLU, a putative cytochrome P450 monooxygenase, is involved in chromosome pairing during female meiosis, most likely by affecting the normal expression pattern of DMC1 in ovules during female meiosis. Our studies provide valuable information for functional genomic analyses of plant germline development as well as insights into meiosis.
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Affiliation(s)
- Lihua Zhao
- Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian Province, China
- National Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Jiangman He
- National Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China
- University of Chinese Academy of Sciences, Shanghai 200032, China
| | - Hanyang Cai
- Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian Province, China
| | - Haiyan Lin
- Shanghai Center for Plant Stress Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Yanqiang Li
- University of Chinese Academy of Sciences, Shanghai 200032, China
- Shanghai Center for Plant Stress Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Renyi Liu
- Department of Botany and Plant Science, University of California, Riverside, CA 92521, USA
| | - Zhenbiao Yang
- Department of Botany and Plant Science, University of California, Riverside, CA 92521, USA
| | - Yuan Qin
- Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian Province, China
- National Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China
- For correspondence ()
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Basic helix–loop–helix transcription factor BcbHLHpol functions as a positive regulator of pollen development in non-heading Chinese cabbage. Funct Integr Genomics 2014; 14:731-9. [DOI: 10.1007/s10142-014-0390-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Revised: 07/20/2014] [Accepted: 08/04/2014] [Indexed: 10/24/2022]
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Hosp J, Ribarits A, Retzer K, Jin Y, Tashpulatov A, Resch T, Friedmann C, Ankele E, Voronin V, Palme K, Heberle-Bors E, Touraev A. A tobacco homolog of DCN1 is involved in pollen development and embryogenesis. PLANT CELL REPORTS 2014; 33:1187-202. [PMID: 24748527 DOI: 10.1007/s00299-014-1609-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 03/13/2014] [Accepted: 03/22/2014] [Indexed: 05/08/2023]
Abstract
KEY MESSAGE We show that DCN1 binds ubiquitin and RUB/NEDD8, associates with cullin, and is functionally conserved. DCN1 activity is required for pollen development transitions and embryogenesis, and for pollen tube growth. Plant proteomes show remarkable plasticity in reaction to environmental challenges and during developmental transitions. Some of this adaptability comes from ubiquitin-mediated protein degradation regulated by cullin-RING E3 ubiquitin ligases (CRLs). CRLs are activated through modification of the cullin subunit with the ubiquitin-like protein RUB/NEDD8 by an E3 ligase called defective in cullin neddylation 1 (DCN1). Here we show that tobacco DCN1 binds ubiquitin and RUB/NEDD8 and associates with cullin. When knocked down by RNAi, tobacco pollen formation was affected and zygotic embryogenesis was blocked around the globular stage. Additionally, we found that RNAi of DCN1 inhibited the stress-triggered reprogramming of cultured microspores from their intrinsic gametophytic mode of development to an embryogenic state. This stress-induced developmental switch is a known feature in many important crops and leads ultimately to the formation of haploid embryos and plants. Compensating the RNAi effect by re-transformation with a promoter-silencing construct restored pollen development and zygotic embryogenesis, as well as the ability for stress-induced formation of embryogenic microspores. Overexpression of DCN1 accelerated pollen tube growth and increased the potential for microspore reprogramming. These results demonstrate that the biochemical function of DCN1 is conserved in plants and that its activity is involved in transitions during pollen development and embryogenesis, and for pollen tube growth.
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Affiliation(s)
- Julia Hosp
- Max F. Perutz Laboratories, Vienna University, Dr. Bohrgasse 9, 1030, Vienna, Austria
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Li Y, Liu T, Duan W, Song X, Shi G, Zhang J, Deng X, Zhang S, Hou X. Instability in mitochondrial membranes in Polima cytoplasmic male sterility of Brassica rapa ssp. chinensis. Funct Integr Genomics 2014; 14:441-51. [DOI: 10.1007/s10142-014-0368-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Revised: 02/27/2014] [Accepted: 03/02/2014] [Indexed: 10/25/2022]
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46
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Zamariola L, Tiang CL, De Storme N, Pawlowski W, Geelen D. Chromosome segregation in plant meiosis. FRONTIERS IN PLANT SCIENCE 2014; 5:279. [PMID: 24987397 PMCID: PMC4060054 DOI: 10.3389/fpls.2014.00279] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Accepted: 05/28/2014] [Indexed: 05/18/2023]
Abstract
Faithful chromosome segregation in meiosis is essential for ploidy stability over sexual life cycles. In plants, defective chromosome segregation caused by gene mutations or other factors leads to the formation of unbalanced or unreduced gametes creating aneuploid or polyploid progeny, respectively. Accurate segregation requires the coordinated execution of conserved processes occurring throughout the two meiotic cell divisions. Synapsis and recombination ensure the establishment of chiasmata that hold homologous chromosomes together allowing their correct segregation in the first meiotic division, which is also tightly regulated by cell-cycle dependent release of cohesin and monopolar attachment of sister kinetochores to microtubules. In meiosis II, bi-orientation of sister kinetochores and proper spindle orientation correctly segregate chromosomes in four haploid cells. Checkpoint mechanisms acting at kinetochores control the accuracy of kinetochore-microtubule attachment, thus ensuring the completion of segregation. Here we review the current knowledge on the processes taking place during chromosome segregation in plant meiosis, focusing on the characterization of the molecular factors involved.
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Affiliation(s)
- Linda Zamariola
- Department of Plant Production, Faculty of Bioscience Engineering, University of GhentGhent, Belgium
| | - Choon Lin Tiang
- Department of Plant Breeding and Genetics, Cornell University, Ithaca, NY, USA
| | - Nico De Storme
- Department of Plant Production, Faculty of Bioscience Engineering, University of GhentGhent, Belgium
| | - Wojtek Pawlowski
- Department of Plant Breeding and Genetics, Cornell University, Ithaca, NY, USA
| | - Danny Geelen
- Department of Plant Production, Faculty of Bioscience Engineering, University of GhentGhent, Belgium
- *Correspondence: Danny Geelen, Department of Plant Production, Faculty of Bioscience Engineering, University of Ghent, Coupure Links 653, 9000 Ghent, Belgium e-mail:
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Ischebeck T, Valledor L, Lyon D, Gingl S, Nagler M, Meijón M, Egelhofer V, Weckwerth W. Comprehensive cell-specific protein analysis in early and late pollen development from diploid microsporocytes to pollen tube growth. Mol Cell Proteomics 2014; 13:295-310. [PMID: 24078888 PMCID: PMC3879621 DOI: 10.1074/mcp.m113.028100] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Revised: 09/24/2013] [Indexed: 01/10/2023] Open
Abstract
Pollen development in angiosperms is one of the most important processes controlling plant reproduction and thus productivity. At the same time, pollen development is highly sensitive to environmental fluctuations, including temperature, drought, and nutrition. Therefore, pollen biology is a major focus in applied studies and breeding approaches for improving plant productivity in a globally changing climate. The most accessible developmental stages of pollen are the mature pollen and the pollen tubes, and these are thus most frequently analyzed. To reveal a complete quantitative proteome map, we additionally addressed the very early stages, analyzing eight stages of tobacco pollen development: diploid microsporocytes, meiosis, tetrads, microspores, polarized microspores, bipolar pollen, desiccated pollen, and pollen tubes. A protocol for the isolation of the early stages was established. Proteins were extracted and analyzed by means of a new gel LC-MS fractionation protocol. In total, 3817 protein groups were identified. Quantitative analysis was performed based on peptide count. Exceedingly stage-specific differential protein regulation was observed during the conversion from the sporophytic to the gametophytic proteome. A map of highly specialized functionality for the different stages could be revealed from the metabolic activity and pronounced differentiation of proteasomal and ribosomal protein complex composition up to protective mechanisms such as high levels of heat shock proteins in the very early stages of development.
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Affiliation(s)
- Till Ischebeck
- From the ‡Department of Molecular Systems Biology, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090, Vienna, Austria
| | - Luis Valledor
- From the ‡Department of Molecular Systems Biology, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090, Vienna, Austria
| | - David Lyon
- From the ‡Department of Molecular Systems Biology, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090, Vienna, Austria
| | - Stephanie Gingl
- From the ‡Department of Molecular Systems Biology, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090, Vienna, Austria
| | - Matthias Nagler
- From the ‡Department of Molecular Systems Biology, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090, Vienna, Austria
| | - Mónica Meijón
- ¶Gregor-Mendel-Institute for Molecular Plant Biology, Dr. Bohr-Gasse 3, 1030 Vienna, Austria
| | - Volker Egelhofer
- From the ‡Department of Molecular Systems Biology, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090, Vienna, Austria
| | - Wolfram Weckwerth
- From the ‡Department of Molecular Systems Biology, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090, Vienna, Austria
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48
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Wu J, Li M, Li T. Genetic features of the spontaneous self-compatible mutant, 'Jin Zhui' (Pyrus bretschneideri Rehd.). PLoS One 2013; 8:e76509. [PMID: 24116113 PMCID: PMC3792025 DOI: 10.1371/journal.pone.0076509] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2013] [Accepted: 08/26/2013] [Indexed: 11/18/2022] Open
Abstract
‘Jin Zhui’ is a spontaneous self-compatible mutant of ‘Ya Li’ (Pyrus bretschneideri Rehd. S21S34), the latter displaying a typical S-RNase-based gametophytic self-incompatibility (GSI). The pollen-part mutation (PPM) of ‘Jin Zhui’ might be due to a natural mutation in the pollen-S gene (S34 haplotype). However, the molecular mechanisms behind these phenotypic changes are still unclear. In this study, we identified five SLF (S-Locus F-box) genes in ‘Ya Li’, while no nucleotide differences were found in the SLF genes of ‘Jin Zhui’. Further genetic analysis by S-RNase PCR-typing of selfed progeny of ‘Jin Zhui’ and ‘Ya Li’ × ‘Jin Zhui’ progeny showed three progeny classes (S21S21, S21S34 and S34S34) as opposed to the two classes reported previously (S21S34 and S34S34), indicating that the pollen gametes of ‘Jin Zhui’, bearing either the S21- or S34-haplotype, were able to overcome self-incompatibility (SI) barriers. Moreover, no evidence of pollen-S duplication was found. These findings support the hypothesis that loss of function of S-locus unlinked PPM expressed in pollen leads to SI breakdown in ‘Jin Zhui’, rather than natural mutation in the pollen-S gene (S34 haplotype). Furthermore, abnormal meiosis was observed in a number of pollen mother cells (PMCs) in ‘Jin Zhui’, but not in ‘Ya Li’. These and other interesting findings are discussed.
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Affiliation(s)
- Junkai Wu
- Laboratory of Fruit Tree Cell and Molecular Breeding, China Agricultural University, Beijing, China
| | - Maofu Li
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- * E-mail: (MFL); (TZL)
| | - Tianzhong Li
- Laboratory of Fruit Tree Cell and Molecular Breeding, China Agricultural University, Beijing, China
- * E-mail: (MFL); (TZL)
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Zhou W, Yao R, Li H, Li S, Yan J. New perspective on the stabilization and degradation of the F-box protein COI1 in Arabidopsis. PLANT SIGNALING & BEHAVIOR 2013; 8:24973. [PMID: 23733061 PMCID: PMC3999069 DOI: 10.4161/psb.24973] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Accepted: 05/08/2013] [Indexed: 05/29/2023]
Abstract
The F-box protein CORONATINE INSENSITIVE1 (COI1) assembles into SCF(COI1) complexes and recruits its substrate JAZ proteins for ubiquitination and degradation to regulate diverse aspects of jasmonate-regulated plant developmental processes and defense responses. However, the dynamically regulation of COI1 protein abundance in plants remains unknown. In our Plant Cell paper, through genetic, biochemical analysis and in vitro degradation assays, we demonstrated that the COI1 protein is strictly regulated by a dynamic balance of SCF(COI1)-mediated stabilization and 26S proteasome-mediated degradation, and maintained at a proper level suitable for essential biological processes in plants. In this addendum, we provided additional insights and speculation on the stabilization and degradation of COI1.
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50
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Yan J, Li H, Li S, Yao R, Deng H, Xie Q, Xie D. The Arabidopsis F-box protein CORONATINE INSENSITIVE1 is stabilized by SCFCOI1 and degraded via the 26S proteasome pathway. THE PLANT CELL 2013; 25:486-98. [PMID: 23386265 PMCID: PMC3608773 DOI: 10.1105/tpc.112.105486] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Jasmonate regulates critical aspects of plant development and defense. The F-box protein CORONATINE INSENSITIVE1 (COI1) functions as a jasmonate receptor and forms Skp1/Cullin1/F-box protein COI1 (SCF(COI1)) complexes with Arabidopsis thaliana Cullin1 and Arabidopsis Skp1-like1 (ASK1) to recruit its substrate jasmonate ZIM-domain proteins for ubiquitination and degradation. Here, we reveal a mechanism regulating COI1 protein levels in Arabidopsis. Genetic and biochemical analysis and in vitro degradation assays demonstrated that the COI1 protein was initially stabilized by interacting with ASK1 and further secured by assembly into SCF(COI1) complexes, suggesting a function for SCF(COI1) in the stabilization of COI1 in Arabidopsis. Furthermore, we show that dissociated COI1 is degraded through the 26S proteasome pathway, and we identified the 297th Lys residue as an active ubiquitination site in COI1. Our data suggest that the COI1 protein is strictly regulated by a dynamic balance of SCF(COI1)-mediated stabilization and 26S proteasome-mediated degradation and thus maintained at a protein level essential for proper biological functions in Arabidopsis development and defense responses.
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Affiliation(s)
- Jianbin Yan
- The Tsinghua University-Peking University Center for Life Sciences, MOE Key Laboratory of Bioinformatics, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Haiou Li
- The Tsinghua University-Peking University Center for Life Sciences, MOE Key Laboratory of Bioinformatics, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Shuhua Li
- The Tsinghua University-Peking University Center for Life Sciences, MOE Key Laboratory of Bioinformatics, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Ruifeng Yao
- The Tsinghua University-Peking University Center for Life Sciences, MOE Key Laboratory of Bioinformatics, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Haiteng Deng
- The Tsinghua University-Peking University Center for Life Sciences, MOE Key Laboratory of Bioinformatics, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Qi Xie
- State Key Laboratory of Plant Genomics, National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Daoxin Xie
- The Tsinghua University-Peking University Center for Life Sciences, MOE Key Laboratory of Bioinformatics, School of Life Sciences, Tsinghua University, Beijing 100084, China
- Address correspondence to
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