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du Preez LL, van der Walt E, Valverde A, Rothmann C, Neser FWC, Cason ED. A metagenomic survey of the fecal microbiome of the African savanna elephant (Loxodonta africana). Anim Genet 2024; 55:621-643. [PMID: 38923598 DOI: 10.1111/age.13458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 06/06/2024] [Accepted: 06/06/2024] [Indexed: 06/28/2024]
Abstract
The African savanna elephant (Loxodonta africana) is the largest terrestrial animal on Earth and is found primarily in Southern and Eastern Africa. It is a hindgut, colonic fermenter and subsists on a diet of raw plant materials found in its grazing area. In this study the bacterial, archaeal and fungal populations of seven African savanna elephant fecal metagenomes were first characterized using amplicon sequencing. On the genus level it was observed that the p-1088-a5 gut group in the bacteriome, Methanocorpusulum and Methanobrevibacter in the archaeome and Alternaria, Aurobasidium, Didymella and Preussia in the mycome, predominated. Subsequently, metagenomic shotgun sequencing was employed to identify possible functional pathways and carbohydrate-active enzymes (CAZymes). Carbohydrate catabolic pathways represented the main degradation pathways, and the fecal metagenome was enriched in the glycohydroside (GH) class of CAZymes. Additionally, the top GH families identified - GH43, GH2, GH13 and GH3 - are known to be associated with cellulytic, hemicellulytic and pectolytic activities. Finally, the CAZymes families identified in the African savanna elephant were compared with those found in the Asian elephant and it was demonstrated that there is a unique repository of CAZymes that could be leveraged in the biotechnological context such as the degradation of lignocellulose for the production of second-generation biofuels and energy.
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Affiliation(s)
- Louis Lategan du Preez
- Department of Animal Science, University of the Free State, Bloemfontein, Free State, South Africa
| | - Elzette van der Walt
- Department of Microbiology and Biochemistry, University of the Free State, Bloemfontein, Free State, South Africa
| | - Angel Valverde
- Department of Microbiology and Biochemistry, University of the Free State, Bloemfontein, Free State, South Africa
- Instituto de Recursos Naturales y Agrobiología de Salamanca, Consejo Superior de Investigaciones Científicas, Salamanca, Spain
| | - Christopher Rothmann
- Department of Animal Science, University of the Free State, Bloemfontein, Free State, South Africa
- Department of Microbiology and Biochemistry, University of the Free State, Bloemfontein, Free State, South Africa
| | | | - Errol Duncan Cason
- Department of Animal Science, University of the Free State, Bloemfontein, Free State, South Africa
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García-Lozano M, Henzler C, Porras MÁG, Pons I, Berasategui A, Lanz C, Budde H, Oguchi K, Matsuura Y, Pauchet Y, Goffredi S, Fukatsu T, Windsor D, Salem H. Paleocene origin of a streamlined digestive symbiosis in leaf beetles. Curr Biol 2024; 34:1621-1634.e9. [PMID: 38377997 DOI: 10.1016/j.cub.2024.01.070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/22/2024] [Accepted: 01/29/2024] [Indexed: 02/22/2024]
Abstract
Timing the acquisition of a beneficial microbe relative to the evolutionary history of its host can shed light on the adaptive impact of a partnership. Here, we investigated the onset and molecular evolution of an obligate symbiosis between Cassidinae leaf beetles and Candidatus Stammera capleta, a γ-proteobacterium. Residing extracellularly within foregut symbiotic organs, Stammera upgrades the digestive physiology of its host by supplementing plant cell wall-degrading enzymes. We observe that Stammera is a shared symbiont across tortoise and hispine beetles that collectively comprise the Cassidinae subfamily, despite differences in their folivorous habits. In contrast to its transcriptional profile during vertical transmission, Stammera elevates the expression of genes encoding digestive enzymes while in the foregut symbiotic organs, matching the nutritional requirements of its host. Despite the widespread distribution of Stammera across Cassidinae beetles, symbiont acquisition during the Paleocene (∼62 mya) did not coincide with the origin of the subfamily. Early diverging lineages lack the symbiont and the specialized organs that house it. Reconstructing the ancestral state of host-beneficial factors revealed that Stammera encoded three digestive enzymes at the onset of symbiosis, including polygalacturonase-a pectinase that is universally shared. Although non-symbiotic cassidines encode polygalacturonase endogenously, their repertoire of plant cell wall-degrading enzymes is more limited compared with symbiotic beetles supplemented with digestive enzymes from Stammera. Highlighting the potential impact of a symbiotic condition and an upgraded metabolic potential, Stammera-harboring beetles exploit a greater variety of plants and are more speciose compared with non-symbiotic members of the Cassidinae.
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Affiliation(s)
- Marleny García-Lozano
- Mutualisms Research Group, Max Planck Institute for Biology, Tübingen 72076, Germany
| | - Christine Henzler
- Mutualisms Research Group, Max Planck Institute for Biology, Tübingen 72076, Germany
| | | | - Inès Pons
- Mutualisms Research Group, Max Planck Institute for Biology, Tübingen 72076, Germany
| | - Aileen Berasategui
- Mutualisms Research Group, Max Planck Institute for Biology, Tübingen 72076, Germany; Amsterdam Institute for Life and Environment, Vrije Universiteit, Amsterdam 1081 HV, the Netherlands
| | - Christa Lanz
- Genome Center, Max Planck Institute for Biology, Tübingen 72076, Germany
| | - Heike Budde
- Department of Microbiome Science, Max Planck Institute for Biology, Tübingen 72076, Germany
| | - Kohei Oguchi
- National Institute for Advanced Industrial Science and Technology, Tsukuba 305-8566, Japan; Misaki Marine Biological Station, The University of Tokyo, Miura 238-0225, Japan
| | - Yu Matsuura
- Tropical Biosphere Research Center, University of the Ryukyus, Okinawa 903-0213, Japan
| | - Yannick Pauchet
- Department of Insect Symbiosis, Max Planck Institute for Chemical Ecology, Jena 07745, Germany
| | - Shana Goffredi
- Department of Biology, Occidental College, Los Angeles, CA 90041, USA
| | - Takema Fukatsu
- National Institute for Advanced Industrial Science and Technology, Tsukuba 305-8566, Japan
| | - Donald Windsor
- Smithsonian Tropical Research Institute, Panama City 0843-03092, Panama
| | - Hassan Salem
- Mutualisms Research Group, Max Planck Institute for Biology, Tübingen 72076, Germany; Smithsonian Tropical Research Institute, Panama City 0843-03092, Panama.
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Fischer ML, Yepes Vivas SA, Wielsch N, Kirsch R, Vilcinskas A, Vogel H. You are what you eat-ecological niche and microhabitat influence venom activity and composition in aquatic bugs. Proc Biol Sci 2023; 290:20222064. [PMID: 36946119 PMCID: PMC10031423 DOI: 10.1098/rspb.2022.2064] [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: 10/14/2022] [Accepted: 02/27/2023] [Indexed: 03/23/2023] Open
Abstract
True water bugs (Nepomorpha) are mostly predacious insects that live in aquatic habitats. They use their piercing-sucking mouthparts to inject venomous saliva that facilitates the capture and extra-oral digestion of prey animals, but their venom can also be deployed for defence. In Central Europe, nepomorph species representing different families coexist in the same habitat. However, their feeding ecology, including venom composition and deployment, has not been investigated in detail. We used an integrated proteotranscriptomic and bioactivity-based approach to test whether venom composition and activity differ between four water bug species sharing the same habitat but occupying different ecological niches. We found considerable species-dependent differences in the composition of digestive enzymes and venom components that probably evolved as adaptations to particular food sources, foraging strategies and/or microhabitats. The venom of Corixa punctata differed substantially from that of the three strictly predatory species (Ilyocoris cimicoides, Notonecta glauca and Nepa cinerea), and the abundance of herbivory-associated proteins confirms a mostly plant-based diet. Our findings reveal independent adaptations of the digestive and defensive enzyme repertoires accompanied by the evolution of distinct feeding strategies in aquatic bugs.
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Affiliation(s)
- Maike L. Fischer
- Department of Insect Symbiosis, Max-Planck-Institute for Chemical Ecology, 07745 Jena, Thüringen, Germany
| | - Sol A. Yepes Vivas
- Department of Biochemistry, Max-Planck-Institute for Chemical Ecology, 07745 Jena, Thüringen, Germany
| | - Natalie Wielsch
- Research Group Mass Spectrometry/Proteomics, Max-Planck-Institute for Chemical Ecology, 07745 Jena, Thüringen, Germany
| | - Roy Kirsch
- Department of Insect Symbiosis, Max-Planck-Institute for Chemical Ecology, 07745 Jena, Thüringen, Germany
| | - Andreas Vilcinskas
- Institute for Insect Biotechnology, Justus Liebig Universitat Giessen, 35392 Giessen, Hessen, Germany
| | - Heiko Vogel
- Department of Insect Symbiosis, Max-Planck-Institute for Chemical Ecology, 07745 Jena, Thüringen, Germany
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Metabolic novelty originating from horizontal gene transfer is essential for leaf beetle survival. Proc Natl Acad Sci U S A 2022; 119:e2205857119. [PMID: 36161953 PMCID: PMC9546569 DOI: 10.1073/pnas.2205857119] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Horizontal gene transfer (HGT) provides an evolutionary shortcut for recipient organisms to gain novel functions. Although reports of HGT in higher eukaryotes are rapidly accumulating, in most cases the evolutionary trajectory, metabolic integration, and ecological relevance of acquired genes remain unclear. Plant cell wall degradation by HGT-derived enzymes is widespread in herbivorous insect lineages. Pectin is an abundant polysaccharide in the walls of growing parts of plants. We investigated the significance of horizontally acquired pectin-digesting polygalacturonases (PGs) of the leaf beetle Phaedon cochleariae. Using a CRISPR/Cas9-guided gene knockout approach, we generated a triple knockout and a quadruple PG-null mutant in order to investigate the enzymatic, biological, and ecological effects. We found that pectin-digestion 1) is exclusively linked to the horizontally acquired PGs from fungi, 2) became fixed in the host genome by gene duplication leading to functional redundancy, 3) compensates for nutrient-poor diet by making the nutritious cell contents more accessible, and 4) facilitates the beetles development and survival. Our analysis highlights the selective advantage PGs provide to herbivorous insects and demonstrate the impact of HGT on the evolutionary success of leaf-feeding beetles, major contributors to species diversity.
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Yamada H, Kubo S, Kunishige Y, Azuma H, Kotani Y, Handa S, Nakazawa M, Ueda M, Hasegawa Y, Sakamoto T. Homogalacturonan and xylogalacturonan region specificity of self-cloning vector-expressed pectin methylesterases (AoPME1-3) in Aspergillus oryzae. Enzyme Microb Technol 2021; 150:109894. [PMID: 34489047 DOI: 10.1016/j.enzmictec.2021.109894] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 08/03/2021] [Accepted: 08/09/2021] [Indexed: 10/20/2022]
Abstract
Aspergillus oryzae is a safe microorganism that is commonly used in food production. We constructed a self-cloning vector capable of high expression in A. oryzae. Using the vector, three putative pectin methylesterase (PME) genes belonging to Carbohydrate Esterase family 8 derived from A. oryzae were expressed, and several characteristics of the gene products were examined. The effects of temperature and pH on the three enzymes (AoPME1, 2, and 3) were similar, with optimal reaction temperatures of 50 - 60 °C and optimal reaction pH range of 5 - 6. The specific activities of AoPME1, 2, and 3 for apple pectin were significantly different (34, 7,601, and 2 U/mg, respectively). When the substrate specificity was examined, AoPME1 showed high activity towards pectin derived from soybean and pea. Although AoPME2 showed little activity towards these pectins, it showed very high activity towards apple- and citrus-derived pectins. AoPME3 showed low specific activity towards all substrates tested. Sugar composition analysis revealed that apple- and citrus-derived pectins were rich in homogalacturonan, while soybean- and pea-derived pectins were rich in xylogalacturonan. When pea pectin was treated with endo-polygalacturonase or endo-xylogalacturonase in the presence of each PME, specific synergistic actions were observed (endo-polygalacturonase with AoPME1 or AoPME2 and endo-xylogalacturonase with AoPME1 or AoPME3). Thus, AoPME1 and AoPME3 hydrolyzed the methoxy group in xylogalacturonan. This is the first report of this activity in microbial enzymes. Our findings on the substrate specificity of PMEs should lead to the determination of the distribution of methoxy groups in pectin and the development of new applications in the field of food manufacturing.
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Affiliation(s)
- Hiroyuki Yamada
- General Research Laboratory, Ozeki Corporation, Nishinomiya, Hyogo, 663-8227, Japan
| | - Shoko Kubo
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka, 599-8531, Japan
| | - Yuika Kunishige
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka, 599-8531, Japan
| | - Hotaru Azuma
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka, 599-8531, Japan
| | - Yuka Kotani
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka, 599-8531, Japan
| | - Satoshi Handa
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka, 599-8531, Japan
| | - Masami Nakazawa
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka, 599-8531, Japan
| | - Mitsuhiro Ueda
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka, 599-8531, Japan
| | | | - Tatsuji Sakamoto
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka, 599-8531, Japan.
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Haeger W, Wielsch N, Shin NR, Gebauer-Jung S, Pauchet Y, Kirsch R. New Players in the Interaction Between Beetle Polygalacturonases and Plant Polygalacturonase-Inhibiting Proteins: Insights From Proteomics and Gene Expression Analyses. FRONTIERS IN PLANT SCIENCE 2021; 12:660430. [PMID: 34149758 PMCID: PMC8213348 DOI: 10.3389/fpls.2021.660430] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 04/26/2021] [Indexed: 05/12/2023]
Abstract
Plants possess various defense strategies to counter attacks from microorganisms or herbivores. For example, plants reduce the cell-wall-macerating activity of pathogen- or insect-derived polygalacturonases (PGs) by expressing PG-inhibiting proteins (PGIPs). PGs and PGIPs belong to multi-gene families believed to have been shaped by an evolutionary arms race. The mustard leaf beetle Phaedon cochleariae expresses both active PGs and catalytically inactive PG pseudoenzymes. Previous studies demonstrated that (i) PGIPs target beetle PGs and (ii) the role of PG pseudoenzymes remains elusive, despite having been linked to the pectin degradation pathway. For further insight into the interaction between plant PGIPs and beetle PG family members, we combined affinity purification with proteomics and gene expression analyses, and identified novel inhibitors of beetle PGs from Chinese cabbage (Brassica rapa ssp. pekinensis). A beetle PG pseudoenzyme was not targeted by PGIPs, but instead interacted with PGIP-like proteins. Phylogenetic analysis revealed that PGIP-like proteins clustered apart from "classical" PGIPs but together with proteins, which have been involved in developmental processes. Our results indicate that PGIP-like proteins represent not only interesting novel PG inhibitor candidates in addition to "classical" PGIPs, but also fascinating new players in the arms race between herbivorous beetles and plant defenses.
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Affiliation(s)
- Wiebke Haeger
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Natalie Wielsch
- Mass Spectrometry Research Group, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Na Ra Shin
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Steffi Gebauer-Jung
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Yannick Pauchet
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany
- *Correspondence: Roy Kirsch,
| | - Roy Kirsch
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany
- Yannick Pauchet,
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7
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Gao P, Liu Z, Wen J. Expression Profiling of Plant Cell Wall-Degrading Enzyme Genes in Eucryptorrhynchus scrobiculatus Midgut. Front Physiol 2020; 11:1111. [PMID: 33013475 PMCID: PMC7500146 DOI: 10.3389/fphys.2020.01111] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 08/11/2020] [Indexed: 11/17/2022] Open
Abstract
In China, the wood-boring weevil Eucryptorrhynchus scrobiculatus damages and eventually kills the tree of heaven Ailanthus altissima. To feed and digest the cell wall of A. altissima, E. scrobiculatus requires plant cell wall-degrading enzymes (PCWDEs). In the present study, we used next-generation sequencing to analyze the midgut transcriptome of E. scrobiculatus. Using three midgut transcriptomes, we assembled 21,491 unigenes from 167,714,100 clean reads. We identified 25 putative PCWDEs, including 11 cellulases and 14 pectinases. We constructed phylogenetic trees with a maximum likelihood algorithm to elucidate the relationships between sequences of the PCWDE protein families and speculate the functions of the PCWDE genes in E. scrobiculatus. The expression patterns of 17 enzymes in the midgut transcriptome were analyzed in various tissues by quantitative real-time PCR (RT-qPCR). The relative expression levels of 12 genes in the midgut and two genes in the proboscis were significantly higher than those in the other tissues. The proboscis and midgut are the digestive organs of insects, and the high expression level indirectly indicates that these genes are related to digestion. The present study has enabled us to understand the types and numbers of the PCWDEs of E. scrobiculatus and will be helpful for research regarding other weevils’ PCWDEs in the future.
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Affiliation(s)
- Peng Gao
- Beijing Key Laboratory for Forest Pest Control, Beijing Forestry University, Beijing, China
| | - Zhenkai Liu
- Research Institute of Forestry New Technology, Chinese Academy of Forestry, Beijing, China
| | - Junbao Wen
- Beijing Key Laboratory for Forest Pest Control, Beijing Forestry University, Beijing, China
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8
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Hocq L, Guinand S, Habrylo O, Voxeur A, Tabi W, Safran J, Fournet F, Domon JM, Mollet JC, Pilard S, Pau-Roblot C, Lehner A, Pelloux J, Lefebvre V. The exogenous application of AtPGLR, an endo-polygalacturonase, triggers pollen tube burst and repair. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2020; 103:617-633. [PMID: 32215973 DOI: 10.1111/tpj.14753] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 02/14/2020] [Accepted: 03/12/2020] [Indexed: 05/27/2023]
Abstract
Plant cell wall remodeling plays a key role in the control of cell elongation and differentiation. In particular, fine-tuning of the degree of methylesterification of pectins was previously reported to control developmental processes as diverse as pollen germination, pollen tube elongation, emergence of primordia or elongation of dark-grown hypocotyls. However, how pectin degradation can modulate plant development has remained elusive. Here we report the characterization of a polygalacturonase (PG), AtPGLR, the gene for which is highly expressed at the onset of lateral root emergence in Arabidopsis. Due to gene compensation mechanisms, mutant approaches failed to determine the involvement of AtPGLR in plant growth. To overcome this issue, AtPGLR has been expressed heterologously in the yeast Pichia pastoris and biochemically characterized. We showed that AtPGLR is an endo-PG that preferentially releases non-methylesterified oligogalacturonides with a short degree of polymerization (< 8) at acidic pH. The application of the purified recombinant protein on Amaryllis pollen tubes, an excellent model for studying cell wall remodeling at acidic pH, induced abnormal pollen tubes or cytoplasmic leakage in the subapical dome of the pollen tube tip, where non-methylesterified pectin epitopes are detected. Those leaks could either be repaired by new β-glucan deposits (mostly callose) in the cell wall or promoted dramatic burst of the pollen tube. Our work presents the full biochemical characterization of an Arabidopsis PG and highlights the importance of pectin integrity in pollen tube elongation.
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Affiliation(s)
- Ludivine Hocq
- UMR INRAE 1158 BioEcoAgro, BIOPI Biologie des Plantes et Innovation, SFR Condorcet FR CNRS 3417, Université de Picardie, 33 Rue St Leu, 80039, Amiens, France
| | - Sophie Guinand
- Laboratoire Glycobiologie et Matrice Extracellulaire Végétale, Normandie Université, UNIROUEN, EA 4358, SFR 4377 NORVEGE, IRIB, Tremplin I2C Carnot, 76000, Rouen, France
| | - Olivier Habrylo
- UMR INRAE 1158 BioEcoAgro, BIOPI Biologie des Plantes et Innovation, SFR Condorcet FR CNRS 3417, Université de Picardie, 33 Rue St Leu, 80039, Amiens, France
| | - Aline Voxeur
- UMR INRAE 1158 BioEcoAgro, BIOPI Biologie des Plantes et Innovation, SFR Condorcet FR CNRS 3417, Université de Picardie, 33 Rue St Leu, 80039, Amiens, France
| | - Wafae Tabi
- UMR INRAE 1158 BioEcoAgro, BIOPI Biologie des Plantes et Innovation, SFR Condorcet FR CNRS 3417, Université de Picardie, 33 Rue St Leu, 80039, Amiens, France
| | - Josip Safran
- UMR INRAE 1158 BioEcoAgro, BIOPI Biologie des Plantes et Innovation, SFR Condorcet FR CNRS 3417, Université de Picardie, 33 Rue St Leu, 80039, Amiens, France
| | - Françoise Fournet
- UMR INRAE 1158 BioEcoAgro, BIOPI Biologie des Plantes et Innovation, SFR Condorcet FR CNRS 3417, Université de Picardie, 33 Rue St Leu, 80039, Amiens, France
| | - Jean-Marc Domon
- UMR INRAE 1158 BioEcoAgro, BIOPI Biologie des Plantes et Innovation, SFR Condorcet FR CNRS 3417, Université de Picardie, 33 Rue St Leu, 80039, Amiens, France
| | - Jean-Claude Mollet
- Laboratoire Glycobiologie et Matrice Extracellulaire Végétale, Normandie Université, UNIROUEN, EA 4358, SFR 4377 NORVEGE, IRIB, Tremplin I2C Carnot, 76000, Rouen, France
| | - Serge Pilard
- Plateforme Analytique, Université de Picardie, 33 Rue St Leu, 80039, Amiens, France
| | - Corinne Pau-Roblot
- UMR INRAE 1158 BioEcoAgro, BIOPI Biologie des Plantes et Innovation, SFR Condorcet FR CNRS 3417, Université de Picardie, 33 Rue St Leu, 80039, Amiens, France
| | - Arnaud Lehner
- Laboratoire Glycobiologie et Matrice Extracellulaire Végétale, Normandie Université, UNIROUEN, EA 4358, SFR 4377 NORVEGE, IRIB, Tremplin I2C Carnot, 76000, Rouen, France
| | - Jérôme Pelloux
- UMR INRAE 1158 BioEcoAgro, BIOPI Biologie des Plantes et Innovation, SFR Condorcet FR CNRS 3417, Université de Picardie, 33 Rue St Leu, 80039, Amiens, France
| | - Valérie Lefebvre
- UMR INRAE 1158 BioEcoAgro, BIOPI Biologie des Plantes et Innovation, SFR Condorcet FR CNRS 3417, Université de Picardie, 33 Rue St Leu, 80039, Amiens, France
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9
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Haeger W, Henning J, Heckel DG, Pauchet Y, Kirsch R. Direct evidence for a new mode of plant defense against insects via a novel polygalacturonase-inhibiting protein expression strategy. J Biol Chem 2020; 295:11833-11844. [PMID: 32611768 DOI: 10.1074/jbc.ra120.014027] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 06/30/2020] [Indexed: 12/11/2022] Open
Abstract
Plant cell wall-associated polygalacturonase-inhibiting proteins (PGIPs) are widely distributed in the plant kingdom. They play a crucial role in plant defense against phytopathogens by inhibiting microbial polygalacturonases (PGs). PGs hydrolyze the cell wall polysaccharide pectin and are among the first enzymes to be secreted during plant infection. Recent studies demonstrated that herbivorous insects express their own PG multi-gene families, raising the question whether PGIPs also inhibit insect PGs and protect plants from herbivores. Preliminary evidence suggested that PGIPs may negatively influence larval growth of the leaf beetle Phaedon cochleariae (Coleoptera: Chrysomelidae) and identified BrPGIP3 from Chinese cabbage (Brassica rapa ssp. pekinensis) as a candidate. PGIPs are predominantly studied in planta because their heterologous expression in microbial systems is problematic and instability and aggregation of recombinant PGIPs has complicated in vitro inhibition assays. To minimize aggregate formation, we heterologously expressed BrPGIP3 fused to a glycosylphosphatidylinositol (GPI) membrane anchor, immobilizing it on the extracellular surface of insect cells. We demonstrated that BrPGIP3_GPI inhibited several P. cochleariae PGs in vitro, providing the first direct evidence of an interaction between a plant PGIP and an animal PG. Thus, plant PGIPs not only confer resistance against phytopathogens, but may also aid in defense against herbivorous beetles.
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Affiliation(s)
- Wiebke Haeger
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Jana Henning
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - David G Heckel
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Yannick Pauchet
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Roy Kirsch
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany
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10
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Kirsch R, Vurmaz E, Schaefer C, Eberl F, Sporer T, Haeger W, Pauchet Y. Plants use identical inhibitors to protect their cell wall pectin against microbes and insects. Ecol Evol 2020; 10:3814-3824. [PMID: 32313638 PMCID: PMC7160172 DOI: 10.1002/ece3.6180] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Revised: 02/20/2020] [Accepted: 02/21/2020] [Indexed: 02/06/2023] Open
Abstract
As fundamentally different as phytopathogenic microbes and herbivorous insects are, they enjoy plant-based diets. Hence, they encounter similar challenges to acquire nutrients. Both microbes and beetles possess polygalacturonases (PGs) that hydrolyze the plant cell wall polysaccharide pectin. Countering these threats, plant proteins inhibit PGs of microbes, thereby lowering their infection rate. Whether PG-inhibiting proteins (PGIPs) play a role in defense against herbivorous beetles is unknown. To investigate the significance of PGIPs in insect-plant interactions, feeding assays with the leaf beetle Phaedon cochleariae on Arabidopsis thaliana pgip mutants were performed. Fitness was increased when larvae were fed on mutant plants compared to wild-type plants. Moreover, PG activity was higher, although PG genes were downregulated in larvae fed on PGIP-deficient plants, strongly suggesting that PGIPs impair PG activity. As low PG activity resulted in delayed larval growth, our data provide the first in vivo correlative evidence that PGIPs act as defense against insects.
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Affiliation(s)
- Roy Kirsch
- Department of EntomologyMax Planck Institute for Chemical EcologyJenaGermany
| | - Esma Vurmaz
- Department of EntomologyMax Planck Institute for Chemical EcologyJenaGermany
| | - Carolin Schaefer
- Department of EntomologyMax Planck Institute for Chemical EcologyJenaGermany
| | - Franziska Eberl
- Department of BiochemistryMax Planck Institute for Chemical EcologyJenaGermany
| | - Theresa Sporer
- Research Group Sequestration and Detoxification in InsectsMax Planck Institute for Chemical EcologyJenaGermany
| | - Wiebke Haeger
- Department of EntomologyMax Planck Institute for Chemical EcologyJenaGermany
| | - Yannick Pauchet
- Department of EntomologyMax Planck Institute for Chemical EcologyJenaGermany
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11
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Shelomi M, Wipfler B, Zhou X, Pauchet Y. Multifunctional cellulase enzymes are ancestral in Polyneoptera. INSECT MOLECULAR BIOLOGY 2020; 29:124-135. [PMID: 31449690 DOI: 10.1111/imb.12614] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 07/02/2019] [Accepted: 08/21/2019] [Indexed: 06/10/2023]
Abstract
Many hemimetabolous insects produce their own cellulase enzymes from the glycoside hydrolase family 9, first observed in termites and cockroaches. Phasmatodea have multiple cellulases, some of which are multifunctional and can degrade xylan or xyloglucan. To discover when these abilities evolved, we identified cellulases from the Polyneoptera sampled by the 1000 Insect Transcriptome and Evolution (1KITE) project, including all cockroach and termite transcriptomes. We hoped to identify what role enzyme substrate specificities had in the evolution of dietary specification, such as leaf-feeding or wood-feeding. Putative cellulases were identified from the transcriptomes and analysed phylogenetically. All cellulases were amplified from an exemplar set of Polyneoptera species using rapid amplification of cDNA ends PCR and heterologously expressed in an insect cell line, then tested against different polysaccharides for their digestive abilities. We identified several multifunctional xyloglucanolytic enzymes across Polyneoptera, plus a large group of cellulase-like enzymes found in nearly all insect orders with no discernible digestive ability. Multifunctional xylanolytic cellulases remain unique to Phasmatodea. The presence or absence of multifunctional enzymes does not impact dietary specification, but rather having multiple, multifunctional cellulase genes is an ancestral state for Polyneoptera and possibly Insecta. The prevalence of multifunctional cellulases in other animals demands further investigation.
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Affiliation(s)
- M Shelomi
- Department of Entomology, National Taiwan University, Taipei, Taiwan
| | - B Wipfler
- Zoologisches Forschungsmuseum Alexander Koenig, Bonn, Germany
| | - X Zhou
- Department of Entomology, China Agricultural University, Beijing, China
| | - Y Pauchet
- Department of Entomology, Max-Planck Institute für chemische Ökologie, Jena, Germany
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12
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Ibarra LN, Alves AEODA, Antonino JD, Prado GS, Pinto CEM, Soccol CR, Vasconcelos ÉARD, Grossi-de-Sa MF. Enzymatic activity of a recombinant β-1,4-endoglucanase from the Cotton Boll Weevil (Anthonomus grandis) aiming second generation ethanol production. Sci Rep 2019; 9:19580. [PMID: 31862955 PMCID: PMC6925290 DOI: 10.1038/s41598-019-56070-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 11/20/2019] [Indexed: 01/22/2023] Open
Abstract
In the last years, the production of ethanol fuel has started to change with the introduction of second-generation ethanol (2 G Ethanol) in the energy sector. However, in Brazil, the process of obtaining 2 G ethanol did not reach a basic standard to achieve relevant and economically viable results. Several studies have currently been addressed to solve these issues. A critical stage in the bioethanol production is the deployment of efficient and stable enzymes to catalyze the saccharification step into the process of biomass conversion. The present study comprises a screening for genes coding for plant biomass degradation enzymes, followed by cloning a selected gene, addressing its heterologous expression, and characterizing enzymatic activity towards cellulose derived substrates, with a view to second-generation ethanol production. A cDNA database of the Cotton Boll Weevil, Anthonomus grandis (Coleoptera: Curculionidae), an insect that feeds on cotton plant biomass, was used as a source of plant biomass degradation enzyme genes. A larva and adult midgut-specific β-1,4-Endoglucanase-coding gene (AgraGH45-1) was cloned and expressed in the yeast Pichia pastoris. Its amino acid sequence, including the two catalytic domains, shares high identity with other Coleoptera Glycosyl Hydrolases from family 45 (GH45). AgraGH45-1 activity was detected in a Carboxymethylcellulose (CMC) and Hydroxyethylcellulose (HEC) degradation assay and the optimal conditions for enzymatic activity was pH 5.0 at 50 °C. When compared to commercial cellulase from Aspergillus niger, Agra GH45-1 was 1.3-fold more efficient to degrade HEC substrate. Together, these results show that AgraGH45-1 is a valid candidate to be engineered and be tested for 2 G ethanol production.
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Affiliation(s)
- Liz Nathalia Ibarra
- Universidade Federal do Paraná - UFPR, Curitiba, PR, 81530-980, Brazil.,Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, 70770-917, Brazil
| | - Ana Elizabeth Oliveira de Araújo Alves
- Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, 70770-917, Brazil.,Universidade de Brasília - UnB, Biology Institute, Brasília, DF, 70910-900, Brazil
| | - José Dijair Antonino
- Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, 70770-917, Brazil.,Universidade Federal Rural de Pernambuco - UFRPE, Recife-PE, 52171-900, Brazil
| | - Guilherme Souza Prado
- Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, 70770-917, Brazil.,Universidade Católica de Brasília - UCB, Brasília, DF, 70790-160, Brazil
| | - Clidia Eduarda Moreira Pinto
- Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, 70770-917, Brazil.,Universidade de Brasília - UnB, Biology Institute, Brasília, DF, 70910-900, Brazil
| | | | | | - Maria Fátima Grossi-de-Sa
- Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, 70770-917, Brazil.,Universidade Católica de Brasília - UCB, Brasília, DF, 70790-160, Brazil
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13
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Kaewwongwal A, Liu C, Somta P, Chen J, Tian J, Yuan X, Chen X. A second VrPGIP1 allele is associated with bruchid resistance (Callosobruchus spp.) in wild mungbean (Vigna radiata var. sublobata) accession ACC41. Mol Genet Genomics 2019; 295:275-286. [PMID: 31705195 DOI: 10.1007/s00438-019-01619-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 10/29/2019] [Indexed: 11/26/2022]
Abstract
Two bruchid species, azuki bean weevil (Callosobruchus chinensis L.) and cowpea weevil (Callosobruchus maculatus F.), are the most important insect pests of mungbean [Vigna radiata (L.) Wilczek] after harvest. Improving bruchid resistance is a major goal for mungbean breeders. Bruchid resistance in mungbean is controlled by a single major locus, Br. The tightly linked VrPGIP1 and VrPGIP2, which encode polygalacturonase-inhibiting proteins (PGIPs), are the candidate genes at the Br locus associated with bruchid resistance. One VrPGIP1 resistance allele and two VrPGIP2 resistance alleles have been identified. In this study, we fine-mapped the bruchid-resistance genes in wild mungbean (V. radiata var. sublobata) accession ACC41 using the F2 population (574 individuals) derived from the 'Kamphaeng Saen 2' (susceptible) × ACC41 (resistant) cross. A QTL analysis indicated that the resistance to the azuki bean weevil and cowpea weevil in ACC41 is controlled by a major QTL (qBr5.1) and a minor QTL (qBr5.2), which are only 0.3 cM apart. qBr5.1 and qBr5.2 accounted for about 82% and 2% of the resistance variation in the F2 population, respectively. qBr5.1 was mapped to a 237.35-kb region on mungbean chromosome 5 containing eight annotated genes, including VrPGIP1 and VrPGIP2. An examination of the ACC41 VrPGIP1 and VrPGIP2 sequences revealed a new allele for VrPGIP1 (i.e., VrPGIP1-2). Compared with the wild-type sequence, VrPGIP1-2 has five SNPs, of which four cause amino acid changes (residues 125, 129, 188, and 336). A protein sequence analysis indicated that residues 125 and 129 in VrPGIP1-2 are in a β-sheet B1 region, whereas residues 188 and 336 are in a C10-helix region and at the end of the C-terminal region, respectively. Because the β-sheet B1 region is important for interactions with polygalacturonase (PG), residues 125 and 129 in VrPGIP1-2 likely contribute to bruchid resistance by inhibiting PG. Our results imply that VrPGIP1-2 is associated with the bruchid resistance of wild mungbean accession ACC41. This new resistance allele may be useful for breeding mungbean varieties exhibiting durable bruchid resistance.
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Affiliation(s)
- Anochar Kaewwongwal
- Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, 73140, Thailand
- Center of Advanced Studies for Agriculture and Food (CASAF), Kasetsart University Institute for Advanced Studies, Kasetsart University (NRU-KU), Bangkok, 10900, Thailand
| | - Changyou Liu
- Key Laboratory of Crop Genetics and Breeding of Hebei Province, Institute of Cereal and Oil Crops, Hebei Academy of Agricultural and Forestry Sciences, Shijiazhuang, 050035, China
| | - Prakit Somta
- Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, 73140, Thailand.
- Center of Advanced Studies for Agriculture and Food (CASAF), Kasetsart University Institute for Advanced Studies, Kasetsart University (NRU-KU), Bangkok, 10900, Thailand.
- Center of Excellence on Agricultural Biotechnology: (AG-BIO/PERDO-CHE), Bangkok, 10900, Thailand.
| | - Jingbin Chen
- Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, 50 Zhongling Street, Nanjing, Jiangsu, 210014, China
| | - Jing Tian
- Key Laboratory of Crop Genetics and Breeding of Hebei Province, Institute of Cereal and Oil Crops, Hebei Academy of Agricultural and Forestry Sciences, Shijiazhuang, 050035, China
| | - Xingxing Yuan
- Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, 50 Zhongling Street, Nanjing, Jiangsu, 210014, China
| | - Xin Chen
- Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, 50 Zhongling Street, Nanjing, Jiangsu, 210014, China
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14
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Kirsch R, Kunert G, Vogel H, Pauchet Y. Pectin Digestion in Herbivorous Beetles: Impact of Pseudoenzymes Exceeds That of Their Active Counterparts. Front Physiol 2019; 10:685. [PMID: 31191365 PMCID: PMC6549527 DOI: 10.3389/fphys.2019.00685] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 05/16/2019] [Indexed: 12/11/2022] Open
Abstract
Many protein families harbor pseudoenzymes that have lost the catalytic function of their enzymatically active counterparts. Assigning alternative function and importance to these proteins is challenging. Because the evolution toward pseudoenzymes is driven by gene duplication, they often accumulate in multigene families. Plant cell wall-degrading enzymes (PCWDEs) are prominent examples of expanded gene families. The pectolytic glycoside hydrolase family 28 (GH28) allows herbivorous insects to break down the PCW polysaccharide pectin. GH28 in the Phytophaga clade of beetles contains many active enzymes but also many inactive counterparts. Using functional characterization, gene silencing, global transcriptome analyses, and recordings of life history traits, we found that not only catalytically active but also inactive GH28 proteins are part of the same pectin-digesting pathway. The robustness and plasticity of this pathway and thus its importance for the beetle is supported by extremely high steady-state expression levels and counter-regulatory mechanisms. Unexpectedly, the impact of pseudoenzymes on the pectin-digesting pathway in Phytophaga beetles exceeds even the influence of their active counterparts, such as a lowered efficiency of food-to-energy conversion and a prolongation of the developmental period.
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Affiliation(s)
- Roy Kirsch
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Grit Kunert
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Heiko Vogel
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Yannick Pauchet
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany
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15
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Vicente CSL, Nemchinov LG, Mota M, Eisenback JD, Kamo K, Vieira P. Identification and characterization of the first pectin methylesterase gene discovered in the root lesion nematode Pratylenchus penetrans. PLoS One 2019; 14:e0212540. [PMID: 30794636 PMCID: PMC6386239 DOI: 10.1371/journal.pone.0212540] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Accepted: 02/05/2019] [Indexed: 02/04/2023] Open
Abstract
Similar to other plant-parasitic nematodes, root lesion nematodes possess an array of enzymes that are involved in the degradation of the plant cell wall. Here we report the identification of a gene encoding a cell wall-degrading enzyme, pectin methylesterase PME (EC 3.1.1.11), in the root lesion nematode Pratylenchus penetrans. Both genomic and coding sequences of the gene were cloned for this species, that included the presence of four introns which eliminated a possible contamination from bacteria. Expression of the Pp-pme gene was localized in the esophageal glands of P. penetrans as determined by in situ hybridization. Temporal expression of Pp-pme in planta was validated at early time points of infection. The possible function and activity of the gene were assessed by transient expression of Pp-pme in plants of Nicotiana benthamiana plants via a Potato virus X-based vector. To our knowledge, this is the first report on identification and characterization of a PME gene within the phylum Nematoda.
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Affiliation(s)
- Cláudia S. L. Vicente
- ICAAM - Instituto de Ciências Agrárias e Ambientais Mediterrânicas, Instituto de Investigação e Formação Avançada, Universidade de Évora, Pólo da Mitra, Évora, Portugal
| | - Lev G. Nemchinov
- Molecular Plant Pathology Laboratory, Agricultural Research Service, United States Department of Agriculture, Beltsville, Maryland, United States of America
| | - Manuel Mota
- Departamento de Biologia & ICAAM - Instituto de Ciências Agrárias e Ambientais Mediterrânicas, Universidade de Évora, Pólo da Mitra, Évora, Portugal
| | - Jonathan D. Eisenback
- School of Plant Environmental Science, Virginia Tech, Blacksburg, Virginia, United States of America
| | - Kathryn Kamo
- Floral and Nursery Plants Research Unit, United States of National Arboretum, United States Department of Agriculture, Beltsville, Maryland, United States of America
| | - Paulo Vieira
- Molecular Plant Pathology Laboratory, Agricultural Research Service, United States Department of Agriculture, Beltsville, Maryland, United States of America
- School of Plant Environmental Science, Virginia Tech, Blacksburg, Virginia, United States of America
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16
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Namara LM, Griffin CT, Fitzpatrick D, Kavanagh K, Carolan JC. The effect of entomopathogenic fungal culture filtrate on the immune response and haemolymph proteome of the large pine weevil, Hylobius abietis. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2018; 101:1-13. [PMID: 30026094 DOI: 10.1016/j.ibmb.2018.07.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 06/25/2018] [Accepted: 07/14/2018] [Indexed: 06/08/2023]
Abstract
The large pine weevil Hylobius abietis L. is a major forestry pest in 15 European countries, where it is a threat to 3.4 million hectares of forest. A cellular and proteomic analysis of the effect of culture filtrate of three entomopathogenic fungi (EPF) species on the immune system of H. abietis was performed. Injection with Metarhizium brunneum or Beauvaria bassiana culture filtrate facilitated a significantly increased yeast cell proliferation in larvae. Larvae co-injected with either Beauvaria caledonica or B. bassiana culture filtrate and Candida albicans showed significantly increased mortality. Together these results suggest that EPF culture filtrate has the potential to modulate the insect immune system allowing a subsequent pathogen to proliferate. Injection with EPF culture filtrate was shown to alter the abundance of protease inhibitors, detoxifing enzymes, antimicrobial peptides and proteins involved in reception/detection and development in H. abietis larvae. Larvae injected with B. caledonica culture filtrate displayed significant alterations in abundance of proteins involved in cellulolytic and other metabolic processes in their haemolymph proteome. Screening EPF for their ability to modulate the insect immune response represents a means of assessing EPF for use as biocontrol agents, particularly if the goal is to use them in combination with other control agents.
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Affiliation(s)
- Louise Mc Namara
- Department of Biology, Maynooth University, Maynooth, Co. Kildare, Ireland; Teagasc, Oak Park, Crop Research Centre, Co. Carlow, Ireland.
| | | | - David Fitzpatrick
- Department of Biology, Maynooth University, Maynooth, Co. Kildare, Ireland
| | - Kevin Kavanagh
- Department of Biology, Maynooth University, Maynooth, Co. Kildare, Ireland
| | - James C Carolan
- Department of Biology, Maynooth University, Maynooth, Co. Kildare, Ireland
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17
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Wybouw N, Van Leeuwen T, Dermauw W. A massive incorporation of microbial genes into the genome of Tetranychus urticae, a polyphagous arthropod herbivore. INSECT MOLECULAR BIOLOGY 2018; 27:333-351. [PMID: 29377385 DOI: 10.1111/imb.12374] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A number of horizontal gene transfers (HGTs) have been identified in the spider mite Tetranychus urticae, a chelicerate herbivore. However, the genome of this mite species has at present not been thoroughly mined for the presence of HGT genes. Here, we performed a systematic screen for HGT genes in the T. urticae genome using the h-index metric. Our results not only validated previously identified HGT genes but also uncovered 25 novel HGT genes. In addition to HGT genes with a predicted biochemical function in carbohydrate, lipid and folate metabolism, we also identified the horizontal transfer of a ketopantoate hydroxymethyltransferase and a pantoate β-alanine ligase gene. In plants and bacteria, both genes are essential for vitamin B5 biosynthesis and their presence in the mite genome strongly suggests that spider mites, similar to Bemisia tabaci and nematodes, can synthesize their own vitamin B5. We further show that HGT genes were physically embedded within the mite genome and were expressed in different life stages. By screening chelicerate genomes and transcriptomes, we were able to estimate the evolutionary histories of these HGTs during chelicerate evolution. Our study suggests that HGT has made a significant and underestimated impact on the metabolic repertoire of plant-feeding spider mites.
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Affiliation(s)
- N Wybouw
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, the Netherlands
- Laboratory of Agrozoology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - T Van Leeuwen
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, the Netherlands
- Laboratory of Agrozoology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - W Dermauw
- Laboratory of Agrozoology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
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18
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The pectinases from Sphenophorus levis: Potential for biotechnological applications. Int J Biol Macromol 2018; 112:499-508. [DOI: 10.1016/j.ijbiomac.2018.01.172] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 01/23/2018] [Accepted: 01/25/2018] [Indexed: 12/16/2022]
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19
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Salem H, Bauer E, Kirsch R, Berasategui A, Cripps M, Weiss B, Koga R, Fukumori K, Vogel H, Fukatsu T, Kaltenpoth M. Drastic Genome Reduction in an Herbivore's Pectinolytic Symbiont. Cell 2017; 171:1520-1531.e13. [PMID: 29153832 DOI: 10.1016/j.cell.2017.10.029] [Citation(s) in RCA: 105] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 10/10/2017] [Accepted: 10/17/2017] [Indexed: 02/07/2023]
Abstract
Pectin, an integral component of the plant cell wall, is a recalcitrant substrate against enzymatic challenges by most animals. In characterizing the source of a leaf beetle's (Cassida rubiginosa) pectin-degrading phenotype, we demonstrate its dependency on an extracellular bacterium housed in specialized organs connected to the foregut. Despite possessing the smallest genome (0.27 Mb) of any organism not subsisting within a host cell, the symbiont nonetheless retained a functional pectinolytic metabolism targeting the polysaccharide's two most abundant classes: homogalacturonan and rhamnogalacturonan I. Comparative transcriptomics revealed pectinase expression to be enriched in the symbiotic organs, consistent with enzymatic buildup in these structures following immunostaining with pectinase-targeting antibodies. Symbiont elimination results in a drastically reduced host survivorship and a diminished capacity to degrade pectin. Collectively, our findings highlight symbiosis as a strategy for an herbivore to metabolize one of nature's most complex polysaccharides and a universal component of plant tissues.
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Affiliation(s)
- Hassan Salem
- Insect Symbiosis Research Group, Max Planck Institute for Chemical Ecology, Jena 07745, Germany; Department of Biology, Emory University, Atlanta, GA 30320, USA.
| | - Eugen Bauer
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette 4365, Luxembourg
| | - Roy Kirsch
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena 07745, Germany
| | - Aileen Berasategui
- Insect Symbiosis Research Group, Max Planck Institute for Chemical Ecology, Jena 07745, Germany; Department of Biology, Emory University, Atlanta, GA 30320, USA; Department of Biochemistry, Max Planck Institute for Chemical Ecology, Jena 07745, Germany
| | - Michael Cripps
- AgResearch, Lincoln Research Centre, Lincoln 7608, New Zealand
| | - Benjamin Weiss
- Insect Symbiosis Research Group, Max Planck Institute for Chemical Ecology, Jena 07745, Germany; Department of Evolutionary Ecology, Johannes Gutenberg University, Mainz 55128, Germany
| | - Ryuichi Koga
- National Institute for Advanced Industrial Science and Technology, Tsukuba 305-8566, Japan
| | - Kayoko Fukumori
- National Institute for Advanced Industrial Science and Technology, Tsukuba 305-8566, Japan
| | - Heiko Vogel
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena 07745, Germany
| | - Takema Fukatsu
- National Institute for Advanced Industrial Science and Technology, Tsukuba 305-8566, Japan
| | - Martin Kaltenpoth
- Insect Symbiosis Research Group, Max Planck Institute for Chemical Ecology, Jena 07745, Germany; Department of Evolutionary Ecology, Johannes Gutenberg University, Mainz 55128, Germany
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20
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Antony B, Johny J, Aldosari SA, Abdelazim MM. Identification and expression profiling of novel plant cell wall degrading enzymes from a destructive pest of palm trees, Rhynchophorus ferrugineus. INSECT MOLECULAR BIOLOGY 2017; 26:469-484. [PMID: 28556365 DOI: 10.1111/imb.12314] [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] [Indexed: 05/27/2023]
Abstract
Plant cell wall degrading enzymes (PCWDEs) from insects were recently identified as a multigene family of proteins that consist primarily of glycoside hydrolases (GHs) and carbohydrate esterases (CEs) and play essential roles in the degradation of the cellulose/hemicellulose/pectin network in the invaded host plant. Here we applied transcriptomic and degenerate PCR approaches to identify the PCWDEs from a destructive pest of palm trees, Rhynchophorus ferrugineus, followed by a gut-specific and stage-specific differential expression analysis. We identified a total of 27 transcripts encoding GH family members and three transcripts of the CE family with cellulase, hemicellulase and pectinase activities. We also identified two GH9 candidates, which have not previously been reported from Curculionidae. The gut-specific quantitative expression analysis identified key cellulases, hemicellulases and pectinases from R. ferrugineus. The expression analysis revealed a pectin methylesterase, RferCE8u02, and a cellulase, GH45c34485, which showed the highest gut enriched expression. Comparison of PCWDE expression patterns revealed that cellulases and pectinases are significantly upregulated in the adult stages, and we observed specific high expression of the hemicellulase RferGH16c4170. Overall, our study revealed the potential of PCWDEs from R. ferrugineus, which may be useful in biotechnological applications and may represent new tools in R. ferrugineus pest management strategies.
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Affiliation(s)
- B Antony
- Department of Plant Protection, Chair of Date Palm Research, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - J Johny
- Department of Plant Protection, Chair of Date Palm Research, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - S A Aldosari
- Department of Plant Protection, Chair of Date Palm Research, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - M M Abdelazim
- Department of Plant Protection, Chair of Date Palm Research, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
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21
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Drezen JM, Gauthier J, Josse T, Bézier A, Herniou E, Huguet E. Foreign DNA acquisition by invertebrate genomes. J Invertebr Pathol 2017; 147:157-168. [DOI: 10.1016/j.jip.2016.09.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 09/09/2016] [Accepted: 09/14/2016] [Indexed: 12/14/2022]
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22
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Wagschal KC, Rose Stoller J, Chan VJ, Jordan DB. Expression and Characterization of Hyperthermostable Exopolygalacturonase RmGH28 from Rhodothermus marinus. Appl Biochem Biotechnol 2017; 183:1503-1515. [DOI: 10.1007/s12010-017-2518-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 05/19/2017] [Indexed: 11/28/2022]
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23
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Kaewwongwal A, Chen J, Somta P, Kongjaimun A, Yimram T, Chen X, Srinives P. Novel Alleles of Two Tightly Linked Genes Encoding Polygalacturonase-Inhibiting Proteins (VrPGIP1 and VrPGIP2) Associated with the Br Locus That Confer Bruchid ( Callosobruchus spp.) Resistance to Mungbean ( Vigna radiata) Accession V2709. FRONTIERS IN PLANT SCIENCE 2017; 8:1692. [PMID: 29033965 PMCID: PMC5625325 DOI: 10.3389/fpls.2017.01692] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 09/14/2017] [Indexed: 05/03/2023]
Abstract
Nearly all mungbean cultivars are completely susceptible to seed bruchids (Callosobruchus chinensis and Callosobruchus maculatus). Breeding bruchid-resistant mungbean is a major goal in mungbean breeding programs. Recently, we demonstrated in mungbean (Vigna radiata) accession V2802 that VrPGIP2, which encodes a polygalacturonase inhibiting protein (PGIP), is the Br locus responsible for resistance to C. chinensis and C. maculatus. In this study, mapping in mungbean accession V2709 using a BC11F2 population of 355 individuals revealed that a single major quantitative trait locus, which controlled resistance to both C. chinensis and C. maculatus, was located in a 237.35 Kb region of mungbean chromosome 5 that contained eight annotated genes, including VrPGIP1 (LOC106760236) and VrPGIP2 (LOC106760237). VrPGIP1 and VrPGIP2 are located next to each other and are only 27.56 Kb apart. Sequencing VrPGIP1 and VrPGIP2 in "V2709" revealed new alleles for both VrPGIP1 and VrPGIP2, named VrPGIP1-1 and VrPGIP2-2, respectively. VrPGIP2-2 has one single nucleotide polymorphism (SNP) at position 554 of wild type VrPGIP2. This SNP is a guanine to cystine substitution and causes a proline to arginine change at residue 185 in the VrPGIP2 of "V2709". VrPGIP1-1 has 43 SNPs compared with wild type and "V2802", and 20 cause amino acid changes in VrPGIP1. One change is threonine to proline at residue 185 in VrPGIP1, which is the same as in VrPGIP2. Sequence alignments of VrPGIP2 and VrPGIP1 from "V2709" with common bean (Phaseolus vulgaris) PGIP2 revealed that residue 185 in VrPGIP2 and VrPGIP1 contributes to the secondary structures of proteins that affect interactions between PGIP and polygalacturonase, and that some amino acid changes in VrPGIP1 also affect interactions between PGIP and polygalacturonase. Thus, tightly linked VrPGIP1 and VrPGIP2 are the likely genes at the Br locus that confer bruchid resistance in mungbean "V2709".
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Affiliation(s)
- Anochar Kaewwongwal
- Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Bangkok, Thailand
- Center for Advanced Studies for Agriculture and Food, Kasetsart University Institute for Advanced Studies, Kasetsart University, Bangkok, Thailand
| | - Jingbin Chen
- Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Prakit Somta
- Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Bangkok, Thailand
- Center for Advanced Studies for Agriculture and Food, Kasetsart University Institute for Advanced Studies, Kasetsart University, Bangkok, Thailand
- *Correspondence: Prakit Somta
| | - Alisa Kongjaimun
- Faculty of Animal Sciences and Agricultural Technology, Silpakorn University, Cha-Am, Thailand
| | - Tarika Yimram
- Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Bangkok, Thailand
| | - Xin Chen
- Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Peerasak Srinives
- Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Bangkok, Thailand
- Center for Advanced Studies for Agriculture and Food, Kasetsart University Institute for Advanced Studies, Kasetsart University, Bangkok, Thailand
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Wybouw N, Pauchet Y, Heckel DG, Van Leeuwen T. Horizontal Gene Transfer Contributes to the Evolution of Arthropod Herbivory. Genome Biol Evol 2016; 8:1785-801. [PMID: 27307274 PMCID: PMC4943190 DOI: 10.1093/gbe/evw119] [Citation(s) in RCA: 108] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/09/2016] [Indexed: 01/07/2023] Open
Abstract
Within animals, evolutionary transition toward herbivory is severely limited by the hostile characteristics of plants. Arthropods have nonetheless counteracted many nutritional and defensive barriers imposed by plants and are currently considered as the most successful animal herbivores in terrestrial ecosystems. We gather a body of evidence showing that genomes of various plant feeding insects and mites possess genes whose presence can only be explained by horizontal gene transfer (HGT). HGT is the asexual transmission of genetic information between reproductively isolated species. Although HGT is known to have great adaptive significance in prokaryotes, its impact on eukaryotic evolution remains obscure. Here, we show that laterally transferred genes into arthropods underpin many adaptations to phytophagy, including efficient assimilation and detoxification of plant produced metabolites. Horizontally acquired genes and the traits they encode often functionally diversify within arthropod recipients, enabling the colonization of more host plant species and organs. We demonstrate that HGT can drive metazoan evolution by uncovering its prominent role in the adaptations of arthropods to exploit plants.
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Affiliation(s)
- Nicky Wybouw
- Department of Evolutionary Biology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, the Netherlands
| | - Yannick Pauchet
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - David G Heckel
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Thomas Van Leeuwen
- Department of Evolutionary Biology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, the Netherlands Laboratory of Agrozoology, Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Gent, Belgium
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Expression and Characterization of Hyperthermostable Exo-polygalacturonase TtGH28 from Thermotoga thermophilus. Mol Biotechnol 2016; 58:509-19. [DOI: 10.1007/s12033-016-9948-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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