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Bao X, Jia H, Zhang X, Tian S, Zhao Y, Li X, Lin P, Ma C, Wang P, Song CP, Zhu X. Mapping of cytosol-facing organelle outer membrane proximity proteome by proximity-dependent biotinylation in living Arabidopsis cells. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024; 118:7-23. [PMID: 38261530 DOI: 10.1111/tpj.16641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 11/15/2023] [Accepted: 01/09/2024] [Indexed: 01/25/2024]
Abstract
The cytosol-facing outer membrane (OM) of organelles communicates with other cellular compartments to exchange proteins, metabolites, and signaling molecules. Cellular surveillance systems also target OM-resident proteins to control organellar homeostasis and ensure cell survival under stress. However, the OM proximity proteomes have never been mapped in plant cells since using traditional approaches to discover OM proteins and identify their dynamically interacting partners remains challenging. In this study, we developed an OM proximity labeling (OMPL) system using biotin ligase-mediated proximity biotinylation to identify the proximity proteins of the OMs of mitochondria, chloroplasts, and peroxisomes in living Arabidopsis (Arabidopsis thaliana) cells. Using this approach, we mapped the OM proximity proteome of these three organelles under normal conditions and examined the effects of the ultraviolet-B (UV-B) or high light (HL) stress on the abundances of OM proximity proteins. We demonstrate the power of this system with the discovery of cytosolic factors and OM receptor candidates potentially involved in local protein translation and translocation. The candidate proteins that are involved in mitochondrion-peroxisome, mitochondrion-chloroplast, or peroxisome-chloroplast contacts, and in the organellar quality control system are also proposed based on OMPL analysis. OMPL-generated OM proximity proteomes are valuable sources of candidates for functional validation and suggest directions for further investigation of important questions in cell biology.
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Affiliation(s)
- Xinyue Bao
- State Key Laboratory of Crop Stress Adaptation and Improvement, Henan University, Kaifeng, 475004, China
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Huifang Jia
- State Key Laboratory of Crop Stress Adaptation and Improvement, Henan University, Kaifeng, 475004, China
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Xiaoyan Zhang
- State Key Laboratory of Crop Stress Adaptation and Improvement, Henan University, Kaifeng, 475004, China
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Sang Tian
- Institute of Advanced Biotechnology and School of Life Sciences, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yanming Zhao
- State Key Laboratory of Crop Stress Adaptation and Improvement, Henan University, Kaifeng, 475004, China
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Xiangyun Li
- State Key Laboratory of Crop Stress Adaptation and Improvement, Henan University, Kaifeng, 475004, China
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Ping Lin
- State Key Laboratory of Crop Stress Adaptation and Improvement, Henan University, Kaifeng, 475004, China
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Chongyang Ma
- State Key Laboratory of Crop Stress Adaptation and Improvement, Henan University, Kaifeng, 475004, China
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Pengcheng Wang
- Institute of Advanced Biotechnology and School of Life Sciences, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Chun-Peng Song
- State Key Laboratory of Crop Stress Adaptation and Improvement, Henan University, Kaifeng, 475004, China
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Xiaohong Zhu
- State Key Laboratory of Crop Stress Adaptation and Improvement, Henan University, Kaifeng, 475004, China
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, 475004, China
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Zeng J, Wang Y, Wu G, Sun Q, He X, Zhang X, Sun X, Zhao Y, Liu W, Xu D, Dai X, Ma W. Comparative Transcriptome Analysis Reveals the Genes and Pathways Related to Wheat Root Hair Length. Int J Mol Sci 2024; 25:2069. [PMID: 38396749 PMCID: PMC10889798 DOI: 10.3390/ijms25042069] [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: 01/10/2024] [Revised: 02/03/2024] [Accepted: 02/04/2024] [Indexed: 02/25/2024] Open
Abstract
Tube-like outgrowths from root epidermal cells, known as root hairs, enhance water and nutrient absorption, facilitate microbial interactions, and contribute to plant anchorage by expanding the root surface area. Genetically regulated and strongly influenced by environmental conditions, longer root hairs generally enhance water and nutrient absorption, correlating with increased stress resistance. Wheat, a globally predominant crop pivotal for human nutrition, necessitates the identification of long root hair genotypes and their regulatory genes to enhance nutrient capture and yield potential. This study focused on 261 wheat samples of diverse genotypes during germination, revealing noticeable disparities in the length of the root hair among the genotypes. Notably, two long root hair genotypes (W106 and W136) and two short root hair genotypes (W90 and W100) were identified. Transcriptome sequencing resulted in the development of 12 root cDNA libraries, unveiling 1180 shared differentially expressed genes (DEGs). Further analyses, including GO function annotation, KEGG enrichment, MapMan metabolic pathway analysis, and protein-protein interaction (PPI) network prediction, underscored the upregulation of root hair length regulatory genes in the long root hair genotypes. These included genes are associated with GA and BA hormone signaling pathways, FRS/FRF and bHLH transcription factors, phenylpropanoid, lignin, lignan secondary metabolic pathways, the peroxidase gene for maintaining ROS steady state, and the ankyrin gene with diverse biological functions. This study contributes valuable insights into modulating the length of wheat root hair and identifies candidate genes for the genetic improvement of wheat root traits.
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Affiliation(s)
- Jianbin Zeng
- College of Agronomy, Qingdao Agricultural University, Qingdao 266109, China; (J.Z.); (X.Z.); (X.D.)
| | - Yongmei Wang
- College of Agronomy, Qingdao Agricultural University, Qingdao 266109, China; (J.Z.); (X.Z.); (X.D.)
| | - Gang Wu
- College of Agronomy, Qingdao Agricultural University, Qingdao 266109, China; (J.Z.); (X.Z.); (X.D.)
| | - Qingyi Sun
- College of Agronomy, Qingdao Agricultural University, Qingdao 266109, China; (J.Z.); (X.Z.); (X.D.)
| | - Xiaoyan He
- College of Agronomy, Qingdao Agricultural University, Qingdao 266109, China; (J.Z.); (X.Z.); (X.D.)
| | - Xinyi Zhang
- College of Agronomy, Qingdao Agricultural University, Qingdao 266109, China; (J.Z.); (X.Z.); (X.D.)
| | - Xuelian Sun
- College of Agronomy, Qingdao Agricultural University, Qingdao 266109, China; (J.Z.); (X.Z.); (X.D.)
| | - Yan Zhao
- College of Agronomy, Qingdao Agricultural University, Qingdao 266109, China; (J.Z.); (X.Z.); (X.D.)
| | - Wenxing Liu
- College of Agronomy, Qingdao Agricultural University, Qingdao 266109, China; (J.Z.); (X.Z.); (X.D.)
| | - Dengan Xu
- College of Agronomy, Qingdao Agricultural University, Qingdao 266109, China; (J.Z.); (X.Z.); (X.D.)
| | - Xuehuan Dai
- College of Agronomy, Qingdao Agricultural University, Qingdao 266109, China; (J.Z.); (X.Z.); (X.D.)
| | - Wujun Ma
- College of Agronomy, Qingdao Agricultural University, Qingdao 266109, China; (J.Z.); (X.Z.); (X.D.)
- Academy of Dongying Efficient Agricultural Technology and Industry on Saline and Alkaline Land in Collaboration with Qingdao Agricultural University, Dongying 257347, China
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Christian R, Labbancz J, Usadel B, Dhingra A. Understanding protein import in diverse non-green plastids. Front Genet 2023; 14:969931. [PMID: 37007964 PMCID: PMC10063809 DOI: 10.3389/fgene.2023.969931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 02/24/2023] [Indexed: 03/19/2023] Open
Abstract
The spectacular diversity of plastids in non-green organs such as flowers, fruits, roots, tubers, and senescing leaves represents a Universe of metabolic processes in higher plants that remain to be completely characterized. The endosymbiosis of the plastid and the subsequent export of the ancestral cyanobacterial genome to the nuclear genome, and adaptation of the plants to all types of environments has resulted in the emergence of diverse and a highly orchestrated metabolism across the plant kingdom that is entirely reliant on a complex protein import and translocation system. The TOC and TIC translocons, critical for importing nuclear-encoded proteins into the plastid stroma, remain poorly resolved, especially in the case of TIC. From the stroma, three core pathways (cpTat, cpSec, and cpSRP) may localize imported proteins to the thylakoid. Non-canonical routes only utilizing TOC also exist for the insertion of many inner and outer membrane proteins, or in the case of some modified proteins, a vesicular import route. Understanding this complex protein import system is further compounded by the highly heterogeneous nature of transit peptides, and the varying transit peptide specificity of plastids depending on species and the developmental and trophic stage of the plant organs. Computational tools provide an increasingly sophisticated means of predicting protein import into highly diverse non-green plastids across higher plants, which need to be validated using proteomics and metabolic approaches. The myriad plastid functions enable higher plants to interact and respond to all kinds of environments. Unraveling the diversity of non-green plastid functions across the higher plants has the potential to provide knowledge that will help in developing climate resilient crops.
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Affiliation(s)
- Ryan Christian
- Department of Horticulture, Washington State University, Pullman, WA, United States
| | - June Labbancz
- Department of Horticulture, Washington State University, Pullman, WA, United States
- Department of Horticultural Sciences, Texas A&M University, College Station, TX, United States
| | | | - Amit Dhingra
- Department of Horticulture, Washington State University, Pullman, WA, United States
- Department of Horticultural Sciences, Texas A&M University, College Station, TX, United States
- *Correspondence: Amit Dhingra,
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Melicher P, Dvořák P, Šamaj J, Takáč T. Protein-protein interactions in plant antioxidant defense. FRONTIERS IN PLANT SCIENCE 2022; 13:1035573. [PMID: 36589041 PMCID: PMC9795235 DOI: 10.3389/fpls.2022.1035573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 11/14/2022] [Indexed: 06/17/2023]
Abstract
The regulation of reactive oxygen species (ROS) levels in plants is ensured by mechanisms preventing their over accumulation, and by diverse antioxidants, including enzymes and nonenzymatic compounds. These are affected by redox conditions, posttranslational modifications, transcriptional and posttranscriptional modifications, Ca2+, nitric oxide (NO) and mitogen-activated protein kinase signaling pathways. Recent knowledge about protein-protein interactions (PPIs) of antioxidant enzymes advanced during last decade. The best-known examples are interactions mediated by redox buffering proteins such as thioredoxins and glutaredoxins. This review summarizes interactions of major antioxidant enzymes with regulatory and signaling proteins and their diverse functions. Such interactions are important for stability, degradation and activation of interacting partners. Moreover, PPIs of antioxidant enzymes may connect diverse metabolic processes with ROS scavenging. Proteins like receptor for activated C kinase 1 may ensure coordination of antioxidant enzymes to ensure efficient ROS regulation. Nevertheless, PPIs in antioxidant defense are understudied, and intensive research is required to define their role in complex regulation of ROS scavenging.
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Wang S, Yu Y, Xu C, Xiang L, Huang W, Zhang C, Sun S, Li T, Wang S. PbANK facilitates the long-distance movement of the PbWoxT1-PbPTB3 RNP complex by degrading deposited callose. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 318:111232. [PMID: 35351304 DOI: 10.1016/j.plantsci.2022.111232] [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: 12/22/2021] [Revised: 02/10/2022] [Accepted: 02/19/2022] [Indexed: 06/14/2023]
Abstract
Grafting horticultural crops can result in phenotypic changes in the grafted materials due to the movement of macromolecular signals, including RNAs and proteins, across the graft union; however, little is known about the composition of trafficking ribonucleoprotein (RNP) complexes or how these macromolecules are transported. Here, we used the core of PbPTB3-PbWoxT1 RNP complex, PbPTB3, as bait to screen Pyrus betulaefolia cDNA library for its interaction partners. We identified an ankyrin protein, PbANK, that interacts with PbPTB3 to facilitate its transport through the phloem alongside PbWoxT1 mRNA. Heterografting experiments showed that silencing PbANK in rootstock prevented the transport of PbPTB3 and PbWoxT1 mRNA from the rootstock to the scion. Similarly, heterologous grafting experiments demonstrated that PbANK itself cannot be transported over long distances through a graft union. Fluorescence microscopy showed that silencing ANK affected the intercellular diffusion of PbPTB3 and increased callose deposition at plasmodesmata. Collectively, these findings demonstrate that PbANK mediates the long-distance movement of PbPTB3 and PbWoxT1 by degrading callose to increase the efficiency of cell-to-cell movement.
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Affiliation(s)
- Shengyuan Wang
- Laboratory of Fruit Cell and Molecular Breeding, China Agricultural University, Beijing 100193, China
| | - Yunfei Yu
- Laboratory of Fruit Cell and Molecular Breeding, China Agricultural University, Beijing 100193, China
| | - Chaoran Xu
- Laboratory of Fruit Cell and Molecular Breeding, China Agricultural University, Beijing 100193, China
| | - Ling Xiang
- Laboratory of Fruit Cell and Molecular Breeding, China Agricultural University, Beijing 100193, China
| | - Wenting Huang
- Laboratory of Fruit Cell and Molecular Breeding, China Agricultural University, Beijing 100193, China
| | - Chuan Zhang
- Laboratory of Fruit Cell and Molecular Breeding, China Agricultural University, Beijing 100193, China
| | - Shiyue Sun
- Laboratory of Fruit Cell and Molecular Breeding, China Agricultural University, Beijing 100193, China
| | - Tianzhong Li
- Laboratory of Fruit Cell and Molecular Breeding, China Agricultural University, Beijing 100193, China
| | - Shengnan Wang
- Laboratory of Fruit Cell and Molecular Breeding, China Agricultural University, Beijing 100193, China.
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New Insights into the Chloroplast Outer Membrane Proteome and Associated Targeting Pathways. Int J Mol Sci 2022; 23:ijms23031571. [PMID: 35163495 PMCID: PMC8836251 DOI: 10.3390/ijms23031571] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/24/2022] [Accepted: 01/27/2022] [Indexed: 12/04/2022] Open
Abstract
Plastids are a dynamic class of organelle in plant cells that arose from an ancient cyanobacterial endosymbiont. Over the course of evolution, most genes encoding plastid proteins were transferred to the nuclear genome. In parallel, eukaryotic cells evolved a series of targeting pathways and complex proteinaceous machinery at the plastid surface to direct these proteins back to their target organelle. Chloroplasts are the most well-characterized plastids, responsible for photosynthesis and other important metabolic functions. The biogenesis and function of chloroplasts rely heavily on the fidelity of intracellular protein trafficking pathways. Therefore, understanding these pathways and their regulation is essential. Furthermore, the chloroplast outer membrane proteome remains relatively uncharted territory in our understanding of protein targeting. Many key players in the cytosol, receptors at the organelle surface, and insertases that facilitate insertion into the chloroplast outer membrane remain elusive for this group of proteins. In this review, we summarize recent advances in the understanding of well-characterized chloroplast outer membrane protein targeting pathways as well as provide new insights into novel targeting signals and pathways more recently identified using a bioinformatic approach. As a result of our analyses, we expand the known number of chloroplast outer membrane proteins from 117 to 138.
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Li Z, Li C, Fu S, Liu Y, Xu Y, Wu J, Wang Y, Zhou X. NSvc4 Encoded by Rice Stripe Virus Targets Host Chloroplasts to Suppress Chloroplast-Mediated Defense. Viruses 2021; 14:36. [PMID: 35062239 PMCID: PMC8778898 DOI: 10.3390/v14010036] [Citation(s) in RCA: 6] [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: 12/03/2021] [Revised: 12/22/2021] [Accepted: 12/22/2021] [Indexed: 01/04/2023] Open
Abstract
Our previous research found that NSvc4, the movement protein of rice stripe virus (RSV), could localize to the actin filaments, endoplasmic reticulum, plasmodesmata, and chloroplast, but the roles of NSvc4 played in the chloroplast were opaque. Here, we confirm the accumulation of NSvc4 in the chloroplasts and the N-terminal 1-73 amino acids of NSvc4 are sufficient to localize to chloroplasts. We provide evidence to show that chloroplast-localized NSvc4 can impair the chloroplast-mediated immunity. Expressing NSvc4 in Nicotiana benthamiana leaves results in the decreased expression of defense-related genes NbPR1, NbPR2, and NbWRKY12 and the inhibition of chloroplast-derived ROS production. In addition, generation of an infectious clone of potato virus X (PVX) carrying NSvc4 facilitates PVX infection in N. benthamiana plants. Moreover, we identify two chloroplast-related host factors, named NbGAPDH-A and NbPsbQ1, both of which can interact with NSvc4. Knockdown of NbGAPDH-A or NbPsbQ1 can both promote RSV infection. Our results decipher a detailed function of NSvc4 in the chloroplast.
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Affiliation(s)
- Zongdi Li
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (Z.L.); (C.L.); (S.F.); (Y.L.); (Y.X.)
| | - Chenyang Li
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (Z.L.); (C.L.); (S.F.); (Y.L.); (Y.X.)
| | - Shuai Fu
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (Z.L.); (C.L.); (S.F.); (Y.L.); (Y.X.)
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Yu Liu
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (Z.L.); (C.L.); (S.F.); (Y.L.); (Y.X.)
| | - Yi Xu
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (Z.L.); (C.L.); (S.F.); (Y.L.); (Y.X.)
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China
| | - Jianxiang Wu
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (Z.L.); (C.L.); (S.F.); (Y.L.); (Y.X.)
| | - Yaqin Wang
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (Z.L.); (C.L.); (S.F.); (Y.L.); (Y.X.)
| | - Xueping Zhou
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (Z.L.); (C.L.); (S.F.); (Y.L.); (Y.X.)
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
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8
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Gao Z, Guo L, Chen M, Yu F, Wei Q. Characterization of the development dynamics within the linear growth bamboo leaf. PHYSIOLOGIA PLANTARUM 2021; 172:1518-1534. [PMID: 33502764 DOI: 10.1111/ppl.13346] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 12/18/2020] [Accepted: 01/20/2021] [Indexed: 06/12/2023]
Abstract
The leaf is the main photosynthetic organ in plants, such as bamboo. Leaves from bamboo are used as a food additive. However, according to our investigation, to date there have been no reports concerning the leaf development of bamboo. By measuring over 7500 parenchymal cells, we discovered that the linear leaf growth of Pseudosasa japonica could be divided into three growth sections. The first one is a roughly 1-cm long division zone (DZ), containing about 1580 cells, located at the bottom of the leaf; the second one is an about 3-cm long elongation zone (EZ), with ~1905 cells, located above the DZ; and the last is a mature zone (MZ) in which cell elongation is completed. The cell production rate of the DZ was 25.33-35.81 cells per hour, with an average of 29.73; and the cell division rate was ~0.45 cells per cell every 24 h. PacBio and Illumina transcriptome sequencing found 21 933 unigenes expressed in these zones. Further analysis revealed a dynamic transcriptome, with transcripts for cell division in the DZ changing to transcripts for cell elongation, photosynthetic development, secondary metabolism, stress resistance, and nutrition transport toward the leaf distal. Those transcriptome transformations correlated well with the changes of relative water content, biomass accumulation, and cellulose crystal degree and were supported by quantitative polymerase chain reaction data. These results revealed a developmental gradient of the bamboo linear growth leaf, which offers a foundation to elucidate and engineer leaf development in bamboo, an economically valuable plant.
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Affiliation(s)
- Zhipeng Gao
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Lin Guo
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Ming Chen
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Fen Yu
- Jiangxi Provincial Key Laboratory for Bamboo Germplasm Resources and Utilization, Jiangxi Agriculture University, Nanchang, China
| | - Qiang Wei
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
- Jiangxi Provincial Key Laboratory for Bamboo Germplasm Resources and Utilization, Jiangxi Agriculture University, Nanchang, China
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Zhuang X, Wu Q, Zhang A, Liao L, Fang B. Single-molecule biotechnology for protein researches. Chin J Chem Eng 2021. [DOI: 10.1016/j.cjche.2020.10.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Zhang FJ, Xie YH, Jiang H, Wang X, Hao YJ, Zhang Z, You CX. The ankyrin repeat-containing protein MdANK2B regulates salt tolerance and ABA sensitivity in Malus domestica. PLANT CELL REPORTS 2021; 40:405-419. [PMID: 33331953 DOI: 10.1007/s00299-020-02642-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 11/23/2020] [Indexed: 05/08/2023]
Abstract
The ankyrin repeat-containing protein MdANK2B was identified to contribute to increasing resistance to salt stress and decreasing sensitivity to ABA in Malus domestica. Ankyrin (ANK) repeat-containing proteins occur widely in prokaryotes, eukaryotes, and even in some viruses and play a critical role in plant growth and development, as well as the response to biotic and abiotic stress. However, the function of ANK repeat-containing proteins in apple (Malus domestica) has not yet been investigated. Here, we identified apple MdANK2B based on homology analysis with the Arabidopsis ANK repeat-containing proteins AtAKR2A and AtAKR2B. MdANK2B was found to be localized in the cytoplasm, and its encoding gene was highly expressed in both apple leaves and fruits. In addition, MdANK2B gene expression was highly induced by salt stresses and abscisic acid (ABA). Overexpression of MdANK2B increased resistance to salt stress and decreased sensitivity to ABA in both transgenic apple calli and seedlings. In addition, overexpression of MdANK2B reduced the accumulation of reactive oxygen species (ROS) by enhancing the activity of antioxidant enzymes in response to salt stress. Our data revealed the role of MdANK2B in response to salt stress and ABA treatment in apple, which widens the known functions of ANK repeat-containing proteins in response to abiotic stress.
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Affiliation(s)
- Fu-Jun Zhang
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, National Research Center for Apple Engineering and Technology, Shandong Agricultural University, Tai-An, 271018, Shandong, China
| | - Yin-Huan Xie
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, National Research Center for Apple Engineering and Technology, Shandong Agricultural University, Tai-An, 271018, Shandong, China
| | - Han Jiang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yang ling, Shanxi, 712100, China
| | - Xun Wang
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, National Research Center for Apple Engineering and Technology, Shandong Agricultural University, Tai-An, 271018, Shandong, China
| | - Yu-Jin Hao
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, National Research Center for Apple Engineering and Technology, Shandong Agricultural University, Tai-An, 271018, Shandong, China
| | - Zhenlu Zhang
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, National Research Center for Apple Engineering and Technology, Shandong Agricultural University, Tai-An, 271018, Shandong, China.
| | - Chun-Xiang You
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, National Research Center for Apple Engineering and Technology, Shandong Agricultural University, Tai-An, 271018, Shandong, China.
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Sučec I, Wang Y, Dakhlaoui O, Weinhäupl K, Jores T, Costa D, Hessel A, Brennich M, Rapaport D, Lindorff-Larsen K, Bersch B, Schanda P. Structural basis of client specificity in mitochondrial membrane-protein chaperones. SCIENCE ADVANCES 2020; 6:eabd0263. [PMID: 33355130 PMCID: PMC11206218 DOI: 10.1126/sciadv.abd0263] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 11/05/2020] [Indexed: 06/12/2023]
Abstract
Chaperones are essential for assisting protein folding and for transferring poorly soluble proteins to their functional locations within cells. Hydrophobic interactions drive promiscuous chaperone-client binding, but our understanding of how additional interactions enable client specificity is sparse. Here, we decipher what determines binding of two chaperones (TIM8·13 and TIM9·10) to different integral membrane proteins, the all-transmembrane mitochondrial carrier Ggc1 and Tim23, which has an additional disordered hydrophilic domain. Combining NMR, SAXS, and molecular dynamics simulations, we determine the structures of Tim23/TIM8·13 and Tim23/TIM9·10 complexes. TIM8·13 uses transient salt bridges to interact with the hydrophilic part of its client, but its interactions to the transmembrane part are weaker than in TIM9·10. Consequently, TIM9·10 outcompetes TIM8·13 in binding hydrophobic clients, while TIM8·13 is tuned to few clients with both hydrophilic and hydrophobic parts. Our study exemplifies how chaperones fine-tune the balance of promiscuity versus specificity.
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Affiliation(s)
- Iva Sučec
- Univ. Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale (IBS), 71, Avenue des Martyrs, F-38044 Grenoble, France
| | - Yong Wang
- Structural Biology and NMR Laboratory, the Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen, 2200 Copenhagen, Denmark.
| | - Ons Dakhlaoui
- Univ. Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale (IBS), 71, Avenue des Martyrs, F-38044 Grenoble, France
| | - Katharina Weinhäupl
- Univ. Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale (IBS), 71, Avenue des Martyrs, F-38044 Grenoble, France.
| | - Tobias Jores
- Interfaculty Institute of Biochemistry, University of Tübingen, 72076 Tübingen, Germany
| | - Doriane Costa
- Univ. Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale (IBS), 71, Avenue des Martyrs, F-38044 Grenoble, France
| | - Audrey Hessel
- Univ. Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale (IBS), 71, Avenue des Martyrs, F-38044 Grenoble, France
| | - Martha Brennich
- European Molecular Biology Laboratory, 38042 Grenoble, France
| | - Doron Rapaport
- Interfaculty Institute of Biochemistry, University of Tübingen, 72076 Tübingen, Germany
| | - Kresten Lindorff-Larsen
- Structural Biology and NMR Laboratory, the Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen, 2200 Copenhagen, Denmark
| | - Beate Bersch
- Univ. Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale (IBS), 71, Avenue des Martyrs, F-38044 Grenoble, France.
| | - Paul Schanda
- Univ. Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale (IBS), 71, Avenue des Martyrs, F-38044 Grenoble, France.
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12
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Urquidi-Camacho RA, Lokdarshi A, von Arnim AG. Translational gene regulation in plants: A green new deal. WILEY INTERDISCIPLINARY REVIEWS. RNA 2020; 11:e1597. [PMID: 32367681 PMCID: PMC9258721 DOI: 10.1002/wrna.1597] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 03/31/2020] [Accepted: 04/01/2020] [Indexed: 01/09/2023]
Abstract
The molecular machinery for protein synthesis is profoundly similar between plants and other eukaryotes. Mechanisms of translational gene regulation are embedded into the broader network of RNA-level processes including RNA quality control and RNA turnover. However, over eons of their separate history, plants acquired new components, dropped others, and generally evolved an alternate way of making the parts list of protein synthesis work. Research over the past 5 years has unveiled how plants utilize translational control to defend themselves against viruses, regulate translation in response to metabolites, and reversibly adjust translation to a wide variety of environmental parameters. Moreover, during seed and pollen development plants make use of RNA granules and other translational controls to underpin developmental transitions between quiescent and metabolically active stages. The economics of resource allocation over the daily light-dark cycle also include controls over cellular protein synthesis. Important new insights into translational control on cytosolic ribosomes continue to emerge from studies of translational control mechanisms in viruses. Finally, sketches of coherent signaling pathways that connect external stimuli with a translational response are emerging, anchored in part around TOR and GCN2 kinase signaling networks. These again reveal some mechanisms that are familiar and others that are different from other eukaryotes, motivating deeper studies on translational control in plants. This article is categorized under: Translation > Translation Regulation RNA Structure and Dynamics > Influence of RNA Structure in Biological Systems RNA Interactions with Proteins and Other Molecules > Protein-RNA Interactions: Functional Implications.
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Affiliation(s)
- Ricardo A. Urquidi-Camacho
- UT-ORNL Graduate School of Genome Science and Technology, The University of Tennessee, Knoxville, TN 37996
| | - Ansul Lokdarshi
- Department of Biochemistry & Cellular and Molecular Biology, University of Tennessee, Knoxville, TN 37996
| | - Albrecht G von Arnim
- Department of Biochemistry & Cellular and Molecular Biology and UT-ORNL Graduate School of Genome Science and Technology, University of Tennessee, Knoxville, TN 37996
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13
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Martinez-Seidel F, Beine-Golovchuk O, Hsieh YC, Kopka J. Systematic Review of Plant Ribosome Heterogeneity and Specialization. FRONTIERS IN PLANT SCIENCE 2020; 11:948. [PMID: 32670337 PMCID: PMC7332886 DOI: 10.3389/fpls.2020.00948] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 06/10/2020] [Indexed: 05/25/2023]
Abstract
Plants dedicate a high amount of energy and resources to the production of ribosomes. Historically, these multi-protein ribosome complexes have been considered static protein synthesis machines that are not subject to extensive regulation but only read mRNA and produce polypeptides accordingly. New and increasing evidence across various model organisms demonstrated the heterogeneous nature of ribosomes. This heterogeneity can constitute specialized ribosomes that regulate mRNA translation and control protein synthesis. A prominent example of ribosome heterogeneity is seen in the model plant, Arabidopsis thaliana, which, due to genome duplications, has multiple paralogs of each ribosomal protein (RP) gene. We support the notion of plant evolution directing high RP paralog divergence toward functional heterogeneity, underpinned in part by a vast resource of ribosome mutants that suggest specialization extends beyond the pleiotropic effects of single structural RPs or RP paralogs. Thus, Arabidopsis is a highly suitable model to study this phenomenon. Arabidopsis enables reverse genetics approaches that could provide evidence of ribosome specialization. In this review, we critically assess evidence of plant ribosome specialization and highlight steps along ribosome biogenesis in which heterogeneity may arise, filling the knowledge gaps in plant science by providing advanced insights from the human or yeast fields. We propose a data analysis pipeline that infers the heterogeneity of ribosome complexes and deviations from canonical structural compositions linked to stress events. This analysis pipeline can be extrapolated and enhanced by combination with other high-throughput methodologies, such as proteomics. Technologies, such as kinetic mass spectrometry and ribosome profiling, will be necessary to resolve the temporal and spatial aspects of translational regulation while the functional features of ribosomal subpopulations will become clear with the combination of reverse genetics and systems biology approaches.
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Affiliation(s)
- Federico Martinez-Seidel
- Willmitzer Department, Max Planck-Institute of Molecular Plant Physiology, Potsdam, Germany
- School of BioSciences, University of Melbourne, Parkville, VIC, Australia
| | | | - Yin-Chen Hsieh
- Bioinformatics Subdivision, Wageningen University, Wageningen, Netherlands
| | - Joachim Kopka
- Willmitzer Department, Max Planck-Institute of Molecular Plant Physiology, Potsdam, Germany
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14
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Hu W, Chen L, Qiu X, Wei J, Lu H, Sun G, Ma X, Yang Z, Zhu C, Hou Y, Han X, Sun C, Hu R, Cai Y, Zhang H, Li F, Shen G. AKR2A participates in the regulation of cotton fibre development by modulating biosynthesis of very-long-chain fatty acids. PLANT BIOTECHNOLOGY JOURNAL 2020; 18:526-539. [PMID: 31350932 PMCID: PMC6953204 DOI: 10.1111/pbi.13221] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Revised: 07/07/2019] [Accepted: 07/18/2019] [Indexed: 05/17/2023]
Abstract
The biosynthesis of very-long-chain fatty acids (VLCFAs) and their transport are required for fibre development. However, whether other regulatory factors are involved in this process is unknown. We report here that overexpression of an Arabidopsis gene ankyrin repeat-containing protein 2A (AKR2A) in cotton promotes fibre elongation. RNA-Seq analysis was employed to elucidate the mechanisms of AKR2A in regulating cotton fibre development. The VLCFA content and the ratio of VLCFAs to short-chain fatty acids increased in AKR2A transgenic lines. In addition, AKR2A promotes fibre elongation by regulating ethylene and synergizing with the accumulation of auxin and hydrogen peroxide. Analysis of RNA-Seq data indicates that AKR2A up-regulates transcript levels of genes involved in VLCFAs' biosynthesis, ethylene biosynthesis, auxin and hydrogen peroxide signalling, cell wall and cytoskeletal organization. Furthermore, AKR2A interacted with KCS1 in Arabidopsis both in vitro and in vivo. Moreover, the VLCFA content and the ratio of VLCFAs to short-chain fatty acids increased significantly in seeds of AKR2A-overexpressing lines and AKR2A/KCS1 co-overexpressing lines, while AKR2A mutants are the opposite trend. Our results uncover a novel cotton fibre growth mechanism by which the critical regulator AKR2A promotes fibre development via activating hormone signalling cascade by mediating VLCFA biosynthesis. This study provides a potential candidate gene for improving fibre yield and quality through genetic engineering.
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Affiliation(s)
- Wenjun Hu
- Zhejiang Academy of Agricultural SciencesHangzhouChina
| | - Lin Chen
- Zhejiang Academy of Agricultural SciencesHangzhouChina
| | - Xiaoyun Qiu
- Zhejiang Academy of Agricultural SciencesHangzhouChina
| | - Jia Wei
- Zhejiang Academy of Agricultural SciencesHangzhouChina
| | - Hongling Lu
- Zhejiang Academy of Agricultural SciencesHangzhouChina
| | - Guochang Sun
- Zhejiang Academy of Agricultural SciencesHangzhouChina
| | - Xiongfeng Ma
- State Key Laboratory of Cotton BiologyInstitute of Cotton ResearchChinese Academy of Agricultural SciencesAnyangChina
| | - Zuoren Yang
- State Key Laboratory of Cotton BiologyInstitute of Cotton ResearchChinese Academy of Agricultural SciencesAnyangChina
| | - Chunquan Zhu
- National Key Laboratory of Rice BiologyChina National Rice Research InstituteHangzhouChina
| | - Yuqi Hou
- Zhejiang Academy of Agricultural SciencesHangzhouChina
| | - Xiao Han
- Zhejiang Academy of Agricultural SciencesHangzhouChina
| | - Chunyan Sun
- Zhejiang Academy of Agricultural SciencesHangzhouChina
| | - Rongbin Hu
- Department of Biological SciencesTexas Tech UniversityLubbockTXUSA
| | - Yifan Cai
- Department of Biological SciencesTexas Tech UniversityLubbockTXUSA
| | - Hong Zhang
- Department of Biological SciencesTexas Tech UniversityLubbockTXUSA
| | - Fuguang Li
- State Key Laboratory of Cotton BiologyInstitute of Cotton ResearchChinese Academy of Agricultural SciencesAnyangChina
| | - Guoxin Shen
- Zhejiang Academy of Agricultural SciencesHangzhouChina
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15
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Kim J, Na YJ, Park SJ, Baek SH, Kim DH. Biogenesis of chloroplast outer envelope membrane proteins. PLANT CELL REPORTS 2019; 38:783-792. [PMID: 30671649 DOI: 10.1007/s00299-019-02381-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Accepted: 01/11/2019] [Indexed: 06/09/2023]
Abstract
Most organisms on Earth use glucose, a photosynthetic product, as energy source. The chloroplast, the home of photosynthesis, is the most representative and characteristic organelle in plants and is enclosed by the outer envelope and inner envelope membranes. The chloroplast biogenesis and unique functions are very closely associated with proteins in the two envelope membranes of the chloroplast. Especially, the chloroplast outer envelope membrane proteins have important roles in signal transduction, protein import, lipid biosynthesis and remodeling, exchange of ions and numerous metabolites, plastid division, movement, and host defense. Therefore, biogenesis of these membrane proteins of chloroplast outer envelope membrane is very important for biogenesis of the entire chloroplast proteome as well as plant development. Most proteins among the outer envelope membrane proteins are encoded by the nuclear genome and are post-translationally targeted to the chloroplast outer envelope membrane. In this process, cytoplasmic receptor and import machineries are required for efficient and correct targeting of these membrane proteins. In this review, we have summarized recent advances on the sorting, targeting, and insertion mechanisms of the outer envelope membrane proteins of chloroplasts and also provide future direction of the study on these topics.
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Affiliation(s)
- Jonghak Kim
- Department of Biology, Sunchon National University, Sunchon, 57922, South Korea
| | - Yun Jeong Na
- Department of Biology, Sunchon National University, Sunchon, 57922, South Korea
| | - Soon Ju Park
- Biological Sciences and Research Institute for Basic Science, Wonkwang University, Iksan, 54538, South Korea
| | - So-Hyeon Baek
- Department of Well-being Resources, Sunchon National University, Sunchon, 57922, South Korea
| | - Dae Heon Kim
- Department of Biology, Sunchon National University, Sunchon, 57922, South Korea.
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16
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Hwang I. Plastid biogenesis and homeostasis. PLANT CELL REPORTS 2019; 38:777-778. [PMID: 31165906 DOI: 10.1007/s00299-019-02437-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 05/30/2019] [Indexed: 06/09/2023]
Affiliation(s)
- Inhwan Hwang
- Division of Integrative Biosciences and Biotechnology and Department of Life Sciences, Pohang University of Science and Technology, Pohang, 37673, South Korea.
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17
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Teresinski HJ, Gidda SK, Nguyen TND, Howard NJM, Porter BK, Grimberg N, Smith MD, Andrews DW, Dyer JM, Mullen RT. An RK/ST C-Terminal Motif is Required for Targeting of OEP7.2 and a Subset of Other Arabidopsis Tail-Anchored Proteins to the Plastid Outer Envelope Membrane. PLANT & CELL PHYSIOLOGY 2019; 60:516-537. [PMID: 30521026 DOI: 10.1093/pcp/pcy234] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 12/03/2018] [Indexed: 06/09/2023]
Abstract
Tail-anchored (TA) proteins are a unique class of integral membrane proteins that possess a single C-terminal transmembrane domain and target post-translationally to the specific organelles at which they function. While significant advances have been made in recent years in elucidating the mechanisms and molecular targeting signals involved in the proper sorting of TA proteins, particularly to the endoplasmic reticulum and mitochondria, relatively little is known about the targeting of TA proteins to the plastid outer envelope. Here we show that several known or predicted plastid TA outer envelope proteins (OEPs) in Arabidopsis possess a C-terminal RK/ST sequence motif that serves as a conserved element of their plastid targeting signal. Evidence for this conclusion comes primarily from experiments with OEP7.2, which is a member of the Arabidopsis 7 kDa OEP family. We confirmed that OEP7.2 is localized to the plastid outer envelope and possesses a TA topology, and its C-terminal sequence (CTS), which includes the RK/ST motif, is essential for proper targeting to plastids. The CTS of OEP7.2 is functionally interchangeable with the CTSs of other TA OEPs that possess similar RK/ST motifs, but not with those that lack the motif. Further, a bioinformatics search based on a consensus sequence led to the identification of several new OEP TA proteins. Collectively, this study provides new insight into the mechanisms of TA protein sorting in plant cells, defines a new targeting signal element for a subset of TA OEPs and expands the number and repertoire of TA proteins at the plastid outer envelope.
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Affiliation(s)
- Howard J Teresinski
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, Canada
| | - Satinder K Gidda
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, Canada
| | - Thuy N D Nguyen
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, Canada
| | - Naomi J Marty Howard
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, Canada
| | - Brittany K Porter
- Department of Biology, Wilfrid Laurier University, Waterloo, Ontario, Canada
| | - Nicholas Grimberg
- Department of Biology, Wilfrid Laurier University, Waterloo, Ontario, Canada
| | - Matthew D Smith
- Department of Biology, Wilfrid Laurier University, Waterloo, Ontario, Canada
| | - David W Andrews
- Sunnybrook Research Institute and Departments of Biochemistry and Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - John M Dyer
- United States Department of Agriculture, Agricultural Research Service, US Arid-Land Agricultural Research Center, Maricopa, USA
| | - Robert T Mullen
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, Canada
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18
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Zhuang X, Jiang L. Chloroplast Degradation: Multiple Routes Into the Vacuole. FRONTIERS IN PLANT SCIENCE 2019; 10:359. [PMID: 30972092 PMCID: PMC6443708 DOI: 10.3389/fpls.2019.00359] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Accepted: 03/07/2019] [Indexed: 05/05/2023]
Abstract
Chloroplasts provide energy for all plants by producing sugar during photosynthesis. To adapt to various environmental and developmental cues, plants have developed specific strategies to control chloroplast homeostasis in plant cells, including chloroplast degradation during leaf senescence and the transition of chloroplasts into other types of plastids during the day-night cycle. In recent years, autophagy has emerged as an essential mechanism for selective degradation of chloroplast materials (also known as chlorophagy) in the vacuole. Different types of membrane structures have been implicated to involve in the delivery of distinct chloroplast contents. Here we provide a current overview on chlorophagy and discuss the possible chloroplast receptors and upstream signals in this process.
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Affiliation(s)
- Xiaohong Zhuang
- School of Life Sciences, Centre for Cell & Developmental Biology and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong, China
- The Chinese University of Hong Kong Shenzhen Research Institute, Shenzhen, China
- *Correspondence: Xiaohong Zhuang,
| | - Liwen Jiang
- School of Life Sciences, Centre for Cell & Developmental Biology and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong, China
- The Chinese University of Hong Kong Shenzhen Research Institute, Shenzhen, China
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19
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Chen L, Hou Y, Hu W, Qiu X, Lu H, Wei J, Yu S, He N, Zhang H, Shen G. The molecular chaperon AKR2A increases the mulberry chilling-tolerant capacity by maintaining SOD activity and unsaturated fatty acids composition. Sci Rep 2018; 8:12120. [PMID: 30108371 PMCID: PMC6092340 DOI: 10.1038/s41598-018-30379-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 07/24/2018] [Indexed: 12/23/2022] Open
Abstract
Chilling is common in nature and can damage most plant species, particularly young leaves and buds. Mulberry (Morus spp.) is an economically important food source for the domesticated silkworm (Bombyx mori). However, weather and climatic extremes, such as "late spring coldness", seriously damage mulberry buds and young leaves. The molecular mechanism involved in the differing mulberry chilling tolerance is unclear. In the present study, we found that mSOD1, mFADII, and mKCS1 interacted with mAKR2A and that the expression of mAKR2A, mSOD, mFAD, and mKCS1 in the chilling-tolerant mulberry variety was higher than that in the chilling-sensitive variety. Unsaturated fatty acids content and superoxide dismutase (SOD) activity in the chilling-tolerant variety was higher than that in the chilling-sensitive variety. After chilling treatment, mSOD1, mKCS1 and mAKR2A expression in the chilling-tolerant variety was reduced to lower than that in the chilling-sensitive variety, whereas mFADII expression increased in the chilling-tolerant variety compared with that in the chilling-sensitive variety, suggesting that the increased expression of the molecular chaperon mAKR2A helped to maintain or prompted the chilling-related proteins in the chilling-tolerant variety.
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Affiliation(s)
- Lin Chen
- Sericultural Research Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Yuqi Hou
- Sericultural Research Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Wenjun Hu
- Sericultural Research Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Xiaoyun Qiu
- Sericultural Research Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Hongling Lu
- Sericultural Research Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Jia Wei
- Sericultural Research Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Shaofang Yu
- Sericultural Research Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - NingJia He
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400715, China
| | - Hong Zhang
- Department of Biological Sciences, Texas Tech University, Lubbock, Texas, 79409, USA
| | - Guoxin Shen
- Sericultural Research Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.
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20
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Vaira AM, Lim HS, Bauchan G, Gulbronson CJ, Miozzi L, Vinals N, Natilla A, Hammond J. The interaction of Lolium latent virus major coat protein with ankyrin repeat protein NbANKr redirects it to chloroplasts and modulates virus infection. J Gen Virol 2018; 99:730-742. [PMID: 29557771 DOI: 10.1099/jgv.0.001043] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The Lolium latent virus (LoLV) major coat protein sequence contains a typical chloroplast transit peptide (cTP) domain. In infected Nicotiana benthamiana leaf tissue, LoLV coat proteins can be detected at the chloroplast. In transient expression, several N-terminal deletions of the CP sequence, increasing in length, result in disruption of the domain functionality, markedly affecting intracellular localization. A yeast two-hybrid-based study using LoLV CP as bait identified several potentially interacting Arabidopsis host proteins, most of them with chloroplast-linked pathways. One of them, an ankyrin repeat protein, was studied in detail. The N. benthamiana homologue (NbANKr) targets chloroplasts, is able to co-localize with LoLV CP at chloroplast membranes in transient expression and shows a robust interaction with LoLV CP in vivo by BiFC, which has been confirmed by yeast two-hybrid data. Silencing NbANKr genes in N. benthamiana plants, prior to challenging with LoLV by mechanical inoculation, affects LoLV infection, significantly reducing the level of viral RNA in young leaves, compared to levels in control plants, and suggesting an inhibition of virus movement. Silencing of NbANKr has no obvious effect on plant phenotype, but is able to interfere with LoLV infection, opening the way for a new strategy for virus infection control.
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Affiliation(s)
- A M Vaira
- Institute for Sustainable Plant Protection, IPSP-CNR, Strada delle Cacce 73, 10135, Torino, Italy
- USDA-ARS, USNA, Floral and Nursery Plant Research Unit, 10300 Baltimore Ave, Beltsville, MD, USA
| | - H S Lim
- USDA-ARS, USNA, Floral and Nursery Plant Research Unit, 10300 Baltimore Ave, Beltsville, MD, USA
- Department of Applied Biology, Chungnam National University, Daejeon, 305-764, Republic of Korea
| | - G Bauchan
- USDA-ARS, BARC, Electron and Confocal Microscopy Unit, 10300 Baltimore Ave, Beltsville, MD, USA
| | - C J Gulbronson
- USDA-ARS, USNA, Floral and Nursery Plant Research Unit, 10300 Baltimore Ave, Beltsville, MD, USA
- Oak Ridge Institute for Science and Education (ORISE) Postdoctoral Fellow, USA
| | - L Miozzi
- Institute for Sustainable Plant Protection, IPSP-CNR, Strada delle Cacce 73, 10135, Torino, Italy
| | - N Vinals
- Institute for Sustainable Plant Protection, IPSP-CNR, Strada delle Cacce 73, 10135, Torino, Italy
| | - A Natilla
- USDA-ARS, BARC, Molecular Plant Pathology Laboratory, 10300 Baltimore Ave, Beltsville, MD, USA
- Present address: Arc Horizon, LLC, Innovation Park, 1736 West Paul Dirac Dr., Tallahassee, FL, USA
| | - J Hammond
- USDA-ARS, USNA, Floral and Nursery Plant Research Unit, 10300 Baltimore Ave, Beltsville, MD, USA
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21
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The role of chloroplasts in plant pathology. Essays Biochem 2018; 62:21-39. [PMID: 29273582 DOI: 10.1042/ebc20170020] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 11/22/2017] [Accepted: 11/28/2017] [Indexed: 12/13/2022]
Abstract
Plants have evolved complex tolerance systems to survive abiotic and biotic stresses. Central to these programmes is a sophisticated conversation of signals between the chloroplast and the nucleus. In this review, we examine the antagonism between abiotic stress tolerance (AST) and immunity: we propose that to generate immunogenic signals, plants must disable AST systems, in particular those that manage reactive oxygen species (ROS), while the pathogen seeks to reactivate or enhance those systems to achieve virulence. By boosting host systems of AST, pathogens trick the plant into suppressing chloroplast immunogenic signals and steer the host into making an inappropriate immune response. Pathogens disrupt chloroplast function, both transcriptionally-by secreting effectors that alter host gene expression by interacting with defence-related kinase cascades, with transcription factors, or with promoters themselves-and post-transcriptionally, by delivering effectors that enter the chloroplast or alter the localization of host proteins to change chloroplast activities. These mechanisms reconfigure the chloroplast proteome and chloroplast-originating immunogenic signals in order to promote infection.
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22
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Lee DW, Lee J, Hwang I. Sorting of nuclear-encoded chloroplast membrane proteins. CURRENT OPINION IN PLANT BIOLOGY 2017; 40:1-7. [PMID: 28668581 DOI: 10.1016/j.pbi.2017.06.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 06/07/2017] [Accepted: 06/14/2017] [Indexed: 05/11/2023]
Abstract
Among the many organelles in eukaryotic cells, chloroplasts have the most complex structure, with multiple suborganellar membranes, making protein targeting to chloroplasts, particularly to various suborganellar membranes, highly challenging. Multiple mechanisms function in the biogenesis of chloroplast membrane proteins. Nuclear-encoded nascent proteins can be targeted to the outer envelope membrane directly from the cytosol after translation, but their targeting to the inner envelope and thylakoid membranes requires multiple steps, including cytosolic sorting, translocation across the envelope membranes, sorting in the stroma, and insertion into their target membranes. In this review, we discuss the current knowledge about the sorting mechanisms of proteins to the two envelope membranes and the thylakoid membrane, along with perspectives for future research.
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Affiliation(s)
- Dong Wook Lee
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Junho Lee
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Inhwan Hwang
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang 37673, Republic of Korea; Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Republic of Korea.
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23
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Kim Y, Kim W, Park JW. Principles and Applications of Force Spectroscopy Using Atomic Force Microscopy. B KOREAN CHEM SOC 2016. [DOI: 10.1002/bkcs.11022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Youngkyu Kim
- Department of Chemistry; Pohang University of Science and Technology; Pohang 37673 Korea
| | - Woong Kim
- Department of Chemistry; Pohang University of Science and Technology; Pohang 37673 Korea
| | - Joon Won Park
- Department of Chemistry; Pohang University of Science and Technology; Pohang 37673 Korea
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24
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Erlinghaeuser M, Hagenau L, Wimmer D, Offermann S. Development, subcellular positioning and selective protein accumulation in the dimorphic chloroplasts of single-cell C4 species. CURRENT OPINION IN PLANT BIOLOGY 2016; 31:76-82. [PMID: 27061048 DOI: 10.1016/j.pbi.2016.03.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 03/17/2016] [Accepted: 03/28/2016] [Indexed: 05/17/2023]
Abstract
C4 photosynthesis is typically associated with a carbon concentrating mechanism based on close collaboration between two photosynthetic cell types (Kranz C4). Surprisingly, four species in the family Chenopodiaceae have been described, which perform all required steps for a functional and effective C4 cycle within individual photosynthetic cells. These single-cell C4 species utilize a unique subcellular compartmentation and two functionally different chloroplast types that mimic the functions of the two cell types of the Kranz C4 system. In this review, we will summarize and discuss studies on chloroplast development, positioning and selective accumulation of nuclear encoded proteins, which ultimately allow the operation of a C4 carbon concentrating mechanism within individual cells.
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Affiliation(s)
| | - Lisa Hagenau
- Institute for Botany, Leibniz University Hannover, Germany
| | - Diana Wimmer
- Institute for Botany, Leibniz University Hannover, Germany
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