1
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Gao D. Introduction of Plant Transposon Annotation for Beginners. BIOLOGY 2023; 12:1468. [PMID: 38132293 PMCID: PMC10741241 DOI: 10.3390/biology12121468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 11/21/2023] [Accepted: 11/23/2023] [Indexed: 12/23/2023]
Abstract
Transposons are mobile DNA sequences that contribute large fractions of many plant genomes. They provide exclusive resources for tracking gene and genome evolution and for developing molecular tools for basic and applied research. Despite extensive efforts, it is still challenging to accurately annotate transposons, especially for beginners, as transposon prediction requires necessary expertise in both transposon biology and bioinformatics. Moreover, the complexity of plant genomes and the dynamic evolution of transposons also bring difficulties for genome-wide transposon discovery. This review summarizes the three major strategies for transposon detection including repeat-based, structure-based, and homology-based annotation, and introduces the transposon superfamilies identified in plants thus far, and some related bioinformatics resources for detecting plant transposons. Furthermore, it describes transposon classification and explains why the terms 'autonomous' and 'non-autonomous' cannot be used to classify the superfamilies of transposons. Lastly, this review also discusses how to identify misannotated transposons and improve the quality of the transposon database. This review provides helpful information about plant transposons and a beginner's guide on annotating these repetitive sequences.
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Affiliation(s)
- Dongying Gao
- Small Grains and Potato Germplasm Research Unit, USDA-ARS, Aberdeen, ID 83210, USA
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2
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Huang Y, Liu Y, Guo X, Fan C, Yi C, Shi Q, Su H, Liu C, Yuan J, Liu D, Yang W, Han F. New insights on the evolution of nucleolar dominance in newly resynthesized hexaploid wheat Triticum zhukovskyi. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2023; 115:1298-1315. [PMID: 37246611 DOI: 10.1111/tpj.16320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 05/11/2023] [Accepted: 05/23/2023] [Indexed: 05/30/2023]
Abstract
Nucleolar dominance (ND) is a widespread epigenetic phenomenon in hybridizations where nucleolus transcription fails at the nucleolus organizer region (NOR). However, the dynamics of NORs during the formation of Triticum zhukovskyi (GGAu Au Am Am ), another evolutionary branch of allohexaploid wheat, remains poorly understood. Here, we elucidated genetic and epigenetic changes occurring at the NOR loci within the Am , G, and D subgenomes during allopolyploidization by synthesizing hexaploid wheat GGAu Au Am Am and GGAu Au DD. In T. zhukovskyi, Au genome NORs from T. timopheevii (GGAu Au ) were lost, while the second incoming NORs from T. monococcum (Am Am ) were retained. Analysis of the synthesized T. zhukovskyi revealed that rRNA genes from the Am genome were silenced in F1 hybrids (GAu Am ) and remained inactive after genome doubling and subsequent self-pollinations. We observed increased DNA methylation accompanying the inactivation of NORs in the Am genome and found that silencing of NORs in the S1 generation could be reversed by a cytidine methylase inhibitor. Our findings provide insights into the ND process during the evolutionary period of T. zhukovskyi and highlight that inactive rDNA units may serve as a 'first reserve' in the form of R-loops, contributing to the successful evolution of T. zhukovskyi.
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Affiliation(s)
- Yuhong Huang
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yang Liu
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| | - Xianrui Guo
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| | - Chaolan Fan
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| | - Congyang Yi
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Qinghua Shi
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| | - Handong Su
- Huazhong Agricultural University, Hubei, 430070, China
| | - Chang Liu
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jing Yuan
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| | - Dengcai Liu
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Wuyun Yang
- Crop Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu, 610066, China
| | - Fangpu Han
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
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3
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Mustafin RN. Interrelation of MicroRNAs and Transposons in Aging and Carcinogenesis. ADVANCES IN GERONTOLOGY 2022. [DOI: 10.1134/s2079057022030092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Pecrix Y, Sallet E, Moreau S, Bouchez O, Carrere S, Gouzy J, Jardinaud MF, Gamas P. DNA demethylation and hypermethylation are both required for late nodule development in Medicago. NATURE PLANTS 2022; 8:741-749. [PMID: 35817824 DOI: 10.1038/s41477-022-01188-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 05/30/2022] [Indexed: 06/15/2023]
Abstract
Plant epigenetic regulations are involved in transposable element silencing, developmental processes and responses to the environment1-7. They often involve modifications of DNA methylation, particularly through the DEMETER (DME) demethylase family and RNA-dependent DNA methylation (RdDM)8. Root nodules host rhizobia that can fix atmospheric nitrogen for the plant's benefit in nitrogen-poor soils. The development of indeterminate nodules, as in Medicago truncatula, involves successive waves of gene activation9-12, control of which raises interesting questions. Using laser capture microdissection (LCM) coupled to RNA-sequencing (SYMbiMICS data11), we previously identified 4,309 genes (termed NDD) activated in the nodule differentiation and nitrogen fixation zones, 36% of which belong to co-regulated genomic regions dubbed symbiotic islands13. We found MtDME to be upregulated in the differentiation zone and required for nodule development, and we identified 474 differentially methylated regions hypomethylated in the nodule by analysing ~2% of the genome4. Here, we coupled LCM and whole-genome bisulfite sequencing for a comprehensive view of DNA methylation, integrated with gene expression at the tissue level. Furthermore, using CRISPR-Cas9 mutagenesis of MtDRM2, we showed the importance of RdDM for CHH hypermethylation and nodule development. We thus proposed a model of DNA methylation dynamics during nodule development.
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Affiliation(s)
- Y Pecrix
- LIPME, Université de Toulouse, INRAE, CNRS, Castanet-Tolosan, France
- CIRAD, UMR PVBMT, Saint-Pierre, La Réunion, France
| | - E Sallet
- LIPME, Université de Toulouse, INRAE, CNRS, Castanet-Tolosan, France
| | - S Moreau
- LIPME, Université de Toulouse, INRAE, CNRS, Castanet-Tolosan, France
| | - O Bouchez
- INRAE, US1426, GeT-PlaGe, Genotoul, Castanet-Tolosan, France
| | - S Carrere
- LIPME, Université de Toulouse, INRAE, CNRS, Castanet-Tolosan, France
| | - J Gouzy
- LIPME, Université de Toulouse, INRAE, CNRS, Castanet-Tolosan, France
| | - M-F Jardinaud
- LIPME, Université de Toulouse, INRAE, CNRS, Castanet-Tolosan, France
| | - P Gamas
- LIPME, Université de Toulouse, INRAE, CNRS, Castanet-Tolosan, France.
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Zhao Y, Li X, Xie J, Xu W, Chen S, Zhang X, Liu S, Wu J, El-Kassaby YA, Zhang D. Transposable Elements: Distribution, Polymorphism, and Climate Adaptation in Populus. FRONTIERS IN PLANT SCIENCE 2022; 13:814718. [PMID: 35178060 PMCID: PMC8843856 DOI: 10.3389/fpls.2022.814718] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Accepted: 01/10/2022] [Indexed: 06/14/2023]
Abstract
Transposable elements (TEs) are a class of mobile genetic elements that make effects on shaping rapid phenotypic traits of adaptive significance. TE insertions are usually related to transcription changes of nearby genes, and thus may be subjected to purifying selection. Based on the available genome resources of Populus, we found that the composition of Helitron DNA family were highly variable and could directly influence the transcription of nearby gene expression, which are involving in stress-responsive, programmed cell death, and apoptosis pathway. Next, we indicated TEs are highly enriched in Populus trichocarpa compared with three other congeneric poplar species, especially located at untranslated regions (3'UTRs and 5'UTRs) and Helitron transposons, particularly 24-nt siRNA-targeted, are significantly associated with reduced gene expression. Additionally, we scanned a representative resequenced Populus tomentosa population, and identified 9,680 polymorphic TEs loci. More importantly, we identified a Helitron transposon located at the 3'UTR, which could reduce WRKY18 expression level. Our results highlight the importance of TE insertion events, which could regulate gene expression and drive adaptive phenotypic variation in Populus.
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Affiliation(s)
- Yiyang Zhao
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Xian Li
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Jianbo Xie
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Weijie Xu
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Sisi Chen
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Xiang Zhang
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Sijia Liu
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Jiadong Wu
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Yousry A. El-Kassaby
- Department of Forest and Conservation Sciences, Forest Sciences Centre, Faculty of Forestry, The University of British Columbia, Vancouver, BC, Canada
| | - Deqiang Zhang
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
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6
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Song Y, Chen P, Liu P, Bu C, Zhang D. High-Temperature-Responsive Poplar lncRNAs Modulate Target Gene Expression via RNA Interference and Act as RNA Scaffolds to Enhance Heat Tolerance. Int J Mol Sci 2020; 21:ijms21186808. [PMID: 32948072 PMCID: PMC7555564 DOI: 10.3390/ijms21186808] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 09/09/2020] [Accepted: 09/10/2020] [Indexed: 01/25/2023] Open
Abstract
High-temperature stress is a threat to plant development and survival. Long noncoding RNAs (lncRNAs) participate in plant stress responses, but their functions in the complex stress response network remain unknown. Poplar contributes to terrestrial ecological stability. In this study, we identified 204 high-temperature-responsive lncRNAs in an abiotic stress-tolerant poplar (Populus simonii) species using strand-specific RNA sequencing (ssRNA-seq). Mimicking overexpressed and repressed candidate lncRNAs in poplar was used to illuminate their regulation pattern on targets using nano sheet mediation. These lncRNAs were predicted to target 185 genes, of which 100 were cis genes and 119 were trans genes. Gene Ontology enrichment analysis showed that anatomical structure morphogenesis and response to stress and signaling were significantly enriched. Among heat-responsive LncRNAs, TCONS_00202587 binds to upstream sequences via its secondary structure and interferes with target gene transcription. TCONS_00260893 enhances calcium influx in response to high-temperature treatment by interfering with a specific variant/isoform of the target gene. Heterogeneous expression of these two lncRNA targets promoted photosynthetic protection and recovery, inhibited membrane peroxidation, and suppressed DNA damage in Arabidopsis under heat stress. These results showed that lncRNAs can regulate their target genes by acting as potential RNA scaffolds or through the RNA interference pathway.
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MESH Headings
- Adaptation, Physiological/genetics
- Arabidopsis
- Base Sequence
- Calcium Signaling
- DNA Damage
- DNA, Plant/genetics
- Gene Expression Regulation, Plant/genetics
- Gene Ontology
- Genes, Plant
- Hot Temperature
- Nanostructures
- Nucleic Acid Conformation
- Nucleotide Motifs
- Photosynthesis
- Plant Proteins/biosynthesis
- Plant Proteins/genetics
- Plants, Genetically Modified
- Populus/genetics
- Populus/physiology
- Promoter Regions, Genetic/genetics
- RNA Interference
- RNA, Long Noncoding/genetics
- RNA, Plant/genetics
- RNA, Small Interfering/genetics
- RNA, Small Interfering/pharmacology
- Recombinant Proteins/metabolism
- Stress, Physiological/genetics
- Transcription, Genetic
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Affiliation(s)
- Yuepeng Song
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, 35 Qinghua East Road, Beijing 100083, China; (Y.S.); (P.C.); (P.L.); (C.B.)
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, 35 Qinghua East Road, Beijing 100083, China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, 35 Qinghua East Road, Beijing 100083, China
| | - Panfei Chen
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, 35 Qinghua East Road, Beijing 100083, China; (Y.S.); (P.C.); (P.L.); (C.B.)
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, 35 Qinghua East Road, Beijing 100083, China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, 35 Qinghua East Road, Beijing 100083, China
| | - Peng Liu
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, 35 Qinghua East Road, Beijing 100083, China; (Y.S.); (P.C.); (P.L.); (C.B.)
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, 35 Qinghua East Road, Beijing 100083, China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, 35 Qinghua East Road, Beijing 100083, China
| | - Chenhao Bu
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, 35 Qinghua East Road, Beijing 100083, China; (Y.S.); (P.C.); (P.L.); (C.B.)
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, 35 Qinghua East Road, Beijing 100083, China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, 35 Qinghua East Road, Beijing 100083, China
| | - Deqiang Zhang
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, 35 Qinghua East Road, Beijing 100083, China; (Y.S.); (P.C.); (P.L.); (C.B.)
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, 35 Qinghua East Road, Beijing 100083, China
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, 35 Qinghua East Road, Beijing 100083, China
- Correspondence:
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7
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Zavallo D, Crescente JM, Gantuz M, Leone M, Vanzetti LS, Masuelli RW, Asurmendi S. Genomic re-assessment of the transposable element landscape of the potato genome. PLANT CELL REPORTS 2020; 39:1161-1174. [PMID: 32435866 DOI: 10.1007/s00299-020-02554-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 05/07/2020] [Indexed: 05/14/2023]
Abstract
We provide a comprehensive and reliable potato TE landscape, based on a wide variety of identification tools and integrative approaches, producing clear and ready-to-use outputs for the scientific community. Transposable elements (TEs) are DNA sequences with the ability to autoreplicate and move throughout the host genome. TEs are major drivers in stress response and genome evolution. Given their significance, the development of clear and efficient TE annotation pipelines has become essential for many species. The latest de novo TE discovery tools, along with available TEs from Repbase and sRNA-seq data, allowed us to perform a reliable potato TEs detection, classification and annotation through an open-source and freely available pipeline ( https://github.com/DiegoZavallo/TE_Discovery ). Using a variety of tools, approaches and rules, we were able to provide a clearly annotated of characterized TEs landscape. Additionally, we described the distribution of the different types of TEs across the genome, where LTRs and MITEs present a clear clustering pattern in pericentromeric and subtelomeric/telomeric regions respectively. Finally, we analyzed the insertion age and distribution of LTR retrotransposon families which display a distinct pattern between the two major superfamilies. While older Gypsy elements concentrated around heterochromatic regions, younger Copia elements located predominantly on euchromatic regions. Overall, we delivered not only a reliable, ready-to-use potato TE annotation files, but also all the necessary steps to perform de novo detection for other species.
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Affiliation(s)
- Diego Zavallo
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Los Reseros y Nicolas Repeto, Hurlingham, Argentina.
| | - Juan Manuel Crescente
- Grupo Biotecnologia y Recursos Genéticos, EEA INTA Marcos Juárez, Ruta 12 Km 3, 2580, Marcos Juárez, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Magdalena Gantuz
- Instituto de Biología Agrícola de Mendoza (IBAM), Facultad de Ciencias Agrarias (FCA), CONICET-UNCuyo, Almirante Brown 500, M5528AHB, Chacras de Coria, Mendoza, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Melisa Leone
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Los Reseros y Nicolas Repeto, Hurlingham, Argentina
- Agencia Nacional de Promocion Científica y Tecnológica (ANPCyT), Buenos Aires, Argentina
| | - Leonardo Sebastian Vanzetti
- Grupo Biotecnologia y Recursos Genéticos, EEA INTA Marcos Juárez, Ruta 12 Km 3, 2580, Marcos Juárez, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Ricardo Williams Masuelli
- Instituto de Biología Agrícola de Mendoza (IBAM), Facultad de Ciencias Agrarias (FCA), CONICET-UNCuyo, Almirante Brown 500, M5528AHB, Chacras de Coria, Mendoza, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Sebastian Asurmendi
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Los Reseros y Nicolas Repeto, Hurlingham, Argentina.
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8
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Nieto Feliner G, Casacuberta J, Wendel JF. Genomics of Evolutionary Novelty in Hybrids and Polyploids. Front Genet 2020; 11:792. [PMID: 32849797 PMCID: PMC7399645 DOI: 10.3389/fgene.2020.00792] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 07/03/2020] [Indexed: 12/15/2022] Open
Abstract
It has long been recognized that hybridization and polyploidy are prominent processes in plant evolution. Although classically recognized as significant in speciation and adaptation, recognition of the importance of interspecific gene flow has dramatically increased during the genomics era, concomitant with an unending flood of empirical examples, with or without genome doubling. Interspecific gene flow is thus increasingly thought to lead to evolutionary innovation and diversification, via adaptive introgression, homoploid hybrid speciation and allopolyploid speciation. Less well understood, however, are the suite of genetic and genomic mechanisms set in motion by the merger of differentiated genomes, and the temporal scale over which recombinational complexity mediated by gene flow might be expressed and exposed to natural selection. We focus on these issues here, considering the types of molecular genetic and genomic processes that might be set in motion by the saltational event of genome merger between two diverged species, either with or without genome doubling, and how these various processes can contribute to novel phenotypes. Genetic mechanisms include the infusion of new alleles and the genesis of novel structural variation including translocations and inversions, homoeologous exchanges, transposable element mobilization and novel insertional effects, presence-absence variation and copy number variation. Polyploidy generates massive transcriptomic and regulatory alteration, presumably set in motion by disrupted stoichiometries of regulatory factors, small RNAs and other genome interactions that cascade from single-gene expression change up through entire networks of transformed regulatory modules. We highlight both these novel combinatorial possibilities and the range of temporal scales over which such complexity might be generated, and thus exposed to natural selection and drift.
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Affiliation(s)
- Gonzalo Nieto Feliner
- Department of Biodiversity and Conservation, Real Jardín Botánico, CSIC, Madrid, Spain
| | - Josep Casacuberta
- Center for Research in Agricultural Genomics, CRAG (CSIC-IRTA-UAB-UB), Barcelona, Spain
| | - Jonathan F. Wendel
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA, United States
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9
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Xuan A, Song Y, Bu C, Chen P, El-Kassaby YA, Zhang D. Changes in DNA Methylation in Response to 6-Benzylaminopurine Affect Allele-Specific Gene Expression in Populus Tomentosa. Int J Mol Sci 2020; 21:E2117. [PMID: 32204454 PMCID: PMC7139286 DOI: 10.3390/ijms21062117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 03/13/2020] [Accepted: 03/17/2020] [Indexed: 12/30/2022] Open
Abstract
Cytokinins play important roles in the growth and development of plants. Physiological and photosynthetic characteristics are common indicators to measure the growth and development in plants. However, few reports have described the molecular mechanisms of physiological and photosynthetic changes in response to cytokinin, particularly in woody plants. DNA methylation is an essential epigenetic modification that dynamically regulates gene expression in response to the external environment. In this study, we examined genome-wide DNA methylation variation and transcriptional variation in poplar (Populus tomentosa) after short-term treatment with the synthetic cytokinin 6-benzylaminopurine (6-BA). We identified 460 significantly differentially methylated regions (DMRs) in response to 6-BA treatment. Transcriptome analysis showed that 339 protein-coding genes, 262 long non-coding RNAs (lncRNAs), and 15,793 24-nt small interfering RNAs (siRNAs) were differentially expressed under 6-BA treatment. Among these, 79% were differentially expressed between alleles in P. tomentosa, and 102,819 allele-specific expression (ASE) loci in 19,200 genes were detected showing differences in ASE levels after 6-BA treatment. Combined DNA methylation and gene expression analysis demonstrated that DNA methylation plays an important role in regulating allele-specific gene expression. To further investigate the relationship between these 6-BA-responsive genes and phenotypic variation, we performed SNP analysis of 460 6-BA-responsive DMRs via re-sequencing using a natural population of P. tomentosa, and we identified 206 SNPs that were significantly associated with growth and wood properties. Association analysis indicated that 53% of loci with allele-specific expression had primarily dominant effects on poplar traits. Our comprehensive analyses of P. tomentosa DNA methylation and the regulation of allele-specific gene expression suggest that DNA methylation is an important regulator of imbalanced expression between allelic loci.
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Affiliation(s)
- Anran Xuan
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, China; (A.X.); (Y.S.); (C.B.); (P.C.)
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, China
| | - Yuepeng Song
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, China; (A.X.); (Y.S.); (C.B.); (P.C.)
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, China
| | - Chenhao Bu
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, China; (A.X.); (Y.S.); (C.B.); (P.C.)
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, China
| | - Panfei Chen
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, China; (A.X.); (Y.S.); (C.B.); (P.C.)
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, China
| | - Yousry A. El-Kassaby
- Department of Forest and Conservation Sciences, Faculty of Forestry, Forest Sciences Centre, University of British Columbia, Vancouver, BC V6T 1Z4, Canada;
| | - Deqiang Zhang
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, China; (A.X.); (Y.S.); (C.B.); (P.C.)
- Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, China
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10
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Böhrer M, Rymen B, Himber C, Gerbaud A, Pflieger D, Laudencia-Chingcuanco D, Cartwright A, Vogel J, Sibout R, Blevins T. Integrated Genome-Scale Analysis and Northern Blot Detection of Retrotransposon siRNAs Across Plant Species. Methods Mol Biol 2020; 2166:387-411. [PMID: 32710422 DOI: 10.1007/978-1-0716-0712-1_23] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Cells have sophisticated RNA-directed mechanisms to regulate genes, destroy viruses, or silence transposable elements (TEs). In terrestrial plants, a specialized non-coding RNA machinery involving RNA polymerase IV (Pol IV) and small interfering RNAs (siRNAs) targets DNA methylation and silencing to TEs. Here, we present a bioinformatics protocol for annotating and quantifying siRNAs that derive from long terminal repeat (LTR) retrotransposons. The approach was validated using small RNA northern blot analyses, comparing the species Arabidopsis thaliana and Brachypodium distachyon. To assist hybridization probe design, we configured a genome browser to show small RNA-seq mappings in distinct colors and shades according to their nucleotide lengths and abundances, respectively. Samples from wild-type and pol IV mutant plants, cross-species negative controls, and a conserved microRNA control validated the detected siRNA signals, confirming their origin from specific TEs and their Pol IV-dependent biogenesis. Moreover, an optimized labeling method yielded probes that could detect low-abundance siRNAs from B. distachyon TEs. The integration of de novo TE annotation, small RNA-seq profiling, and northern blotting, as outlined here, will facilitate the comparative genomic analysis of RNA silencing in crop plants and non-model species.
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Affiliation(s)
- Marcel Böhrer
- Institut de Biologie Moléculaire des Plantes, CNRS UPR2357, Université de Strasbourg, Strasbourg, France
| | - Bart Rymen
- Institut de Biologie Moléculaire des Plantes, CNRS UPR2357, Université de Strasbourg, Strasbourg, France
| | - Christophe Himber
- Institut de Biologie Moléculaire des Plantes, CNRS UPR2357, Université de Strasbourg, Strasbourg, France
| | - Aude Gerbaud
- Institut de Biologie Moléculaire des Plantes, CNRS UPR2357, Université de Strasbourg, Strasbourg, France
| | - David Pflieger
- Institut de Biologie Moléculaire des Plantes, CNRS UPR2357, Université de Strasbourg, Strasbourg, France
| | | | - Amy Cartwright
- DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - John Vogel
- DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Richard Sibout
- INRAE, UR BIA, Nantes, France.,Institut Jean-Pierre Bourgin, UMR 1318, INRAE, AgroParisTech, CNRS, Université Paris-Saclay, Versailles, France
| | - Todd Blevins
- Institut de Biologie Moléculaire des Plantes, CNRS UPR2357, Université de Strasbourg, Strasbourg, France.
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11
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Nakamura M, Köhler C, Hennig L. Tissue-specific transposon-associated small RNAs in the gymnosperm tree, Norway spruce. BMC Genomics 2019; 20:997. [PMID: 31856707 PMCID: PMC6923980 DOI: 10.1186/s12864-019-6385-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 12/11/2019] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Small RNAs (sRNAs) are regulatory molecules impacting on gene expression and transposon activity. MicroRNAs (miRNAs) are responsible for tissue-specific and environmentally-induced gene repression. Short interfering RNAs (siRNA) are constitutively involved in transposon silencing across different type of tissues. The male gametophyte in angiosperms has a unique set of sRNAs compared to vegetative tissues, including phased siRNAs from intergenic or genic regions, or epigenetically activated siRNAs. This is contrasted by a lack of knowledge about the sRNA profile of the male gametophyte of gymnosperms. RESULTS Here, we isolated mature pollen from male cones of Norway spruce and investigated its sRNA profiles. While 21-nt sRNAs is the major size class of sRNAs in needles, in pollen 21-nt and 24-nt sRNAs are the most abundant size classes. Although the 24-nt sRNAs were exclusively derived from TEs in pollen, both 21-nt and 24-nt sRNAs were associated with TEs. We also investigated sRNAs from somatic embryonic callus, which has been reported to contain 24-nt sRNAs. Our data show that the 24-nt sRNA profiles are tissue-specific and differ between pollen and cell culture. CONCLUSION Our data reveal that gymnosperm pollen, like angiosperm pollen, has a unique sRNA profile, differing from vegetative leaf tissue. Thus, our results reveal that angiosperm and gymnosperm pollen produce new size classes not present in vegetative tissues; while in angiosperm pollen 21-nt sRNAs are generated, in the gymnosperm Norway spruce 24-nt sRNAs are generated. The tissue-specific production of distinct TE-derived sRNAs in angiosperms and gymnosperms provides insights into the diversification process of sRNAs in TE silencing pathways between the two groups of seed plants.
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Affiliation(s)
- Miyuki Nakamura
- Department of Plant Biology, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, Uppsala, Sweden.
| | - Claudia Köhler
- Department of Plant Biology, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, Uppsala, Sweden
| | - Lars Hennig
- Department of Plant Biology, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, Uppsala, Sweden
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12
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Ji L, Mathioni SM, Johnson S, Tucker D, Bewick AJ, Do Kim K, Daron J, Slotkin RK, Jackson SA, Parrott WA, Meyers BC, Schmitz RJ. Genome-Wide Reinforcement of DNA Methylation Occurs during Somatic Embryogenesis in Soybean. THE PLANT CELL 2019; 31:2315-2331. [PMID: 31439802 PMCID: PMC6790092 DOI: 10.1105/tpc.19.00255] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/29/2019] [Accepted: 08/19/2019] [Indexed: 05/06/2023]
Abstract
Somatic embryogenesis is an important tissue culture technique that sometimes leads to phenotypic variation via genetic and/or epigenetic changes. To understand the genomic and epigenomic impacts of somatic embryogenesis, we characterized soybean (Glycine max) epigenomes sampled from embryos at 10 different stages ranging from 6 weeks to 13 years of continuous culture. We identified genome-wide increases in DNA methylation from cultured samples, especially at CHH sites. The hypermethylation almost exclusively occurred in regions previously possessing non-CG methylation and was accompanied by increases in the expression of genes encoding the RNA-directed DNA methylation (RdDM) machinery. The epigenomic changes were similar between somatic and zygotic embryogenesis. Following the initial global wave of hypermethylation, rare decay events of maintenance methylation were observed, and the extent of the decay increased with time in culture. These losses in DNA methylation were accompanied by downregulation of genes encoding the RdDM machinery and transcriptome reprogramming reminiscent of transcriptomes during late-stage seed development. These results reveal a process for reinforcing already silenced regions to maintain genome integrity during somatic embryogenesis over the short term, which eventually decays at certain loci over longer time scales.
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Affiliation(s)
- Lexiang Ji
- Institute of Bioinformatics, University of Georgia, Athens, Georgia 30602
| | | | - Sarah Johnson
- Institute for Plant Breeding Genetics and Genomics, University of Georgia, Athens, Georgia 30602
| | - Donna Tucker
- Institute for Plant Breeding Genetics and Genomics, University of Georgia, Athens, Georgia 30602
| | - Adam J Bewick
- Department of Genetics, University of Georgia, Athens, Georgia 30602
| | - Kyung Do Kim
- Center for Applied Genetic Technologies, University of Georgia, Athens, Georgia 30602
| | - Josquin Daron
- Department of Molecular Genetics, Ohio State University, Columbus, Ohio 43210
| | - R Keith Slotkin
- Donald Danforth Plant Science Center, St. Louis, Missouri 63132
- Department of Molecular Genetics, Ohio State University, Columbus, Ohio 43210
| | - Scott A Jackson
- Center for Applied Genetic Technologies, University of Georgia, Athens, Georgia 30602
| | - Wayne A Parrott
- Institute for Plant Breeding Genetics and Genomics, University of Georgia, Athens, Georgia 30602
| | - Blake C Meyers
- Donald Danforth Plant Science Center, St. Louis, Missouri 63132
- Division of Plant Sciences, University of Missouri, Columbia, Missouri 63132
| | - Robert J Schmitz
- Department of Genetics, University of Georgia, Athens, Georgia 30602
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13
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Comparative genomic analysis of monosporidial and monoteliosporic cultures for unraveling the complexity of molecular pathogenesis of Tilletia indica pathogen of wheat. Sci Rep 2019; 9:8185. [PMID: 31160715 PMCID: PMC6547692 DOI: 10.1038/s41598-019-44464-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 04/01/2019] [Indexed: 11/09/2022] Open
Abstract
Tilletia indica (Ti) - a quarantined fungal pathogen of wheat and its pathogenesis is chiefly governed by pathogen effectors secreted inside the host plant. The de novo genome sequencing of several field isolates and stages available could be used for understanding the molecular pathogenesis. The presence of gaps and low coverage of assembled genomes poses a problem in accurate functional annotation of such functions. In the present study attempts were made to improve the Ti draft genome through reconciliation of globally available datasets of three highly virulent monoteliospore cultures of Ti field isolates. It has sequence depth of 107x and N50 scaffold size of 80,772 (more than 26 times as large as achieved in the draft assembly) with highest sequence contiguity, more accurate and nearly complete. Functional annotation revealed that Ti genome contains 9209 genes evolved with many expanded gene families and arranged mostly in a cluster. About 79% of Ti genes were orthologous to other basidiomycetes fungi, Around 7.93% proteins were having secretary signals and 6.66% were identified as highly virulent pathogenicity genes. Using improved Ti genome as a reference, the genomic variation was assessed with respect to repeats, SNPs/InDel, gene families and correct set of virulence associated genes during its life cycle. The comparative intra-species, inter-stage and inter-species genomic variation will have broader implications to understand the gene regulatory networks involved in growth, mating and virulence behaviour of Tilletia f. spp. and also for better appreciation of fungal biology and disease management.
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14
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Crescente JM, Zavallo D, Helguera M, Vanzetti LS. MITE Tracker: an accurate approach to identify miniature inverted-repeat transposable elements in large genomes. BMC Bioinformatics 2018; 19:348. [PMID: 30285604 PMCID: PMC6171319 DOI: 10.1186/s12859-018-2376-y] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 09/18/2018] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Miniature inverted-repeat transposable elements (MITEs) are short, non-autonomous class II transposable elements present in a high number of conserved copies in eukaryote genomes. An accurate identification of these elements can help to shed light on the mechanisms controlling genome evolution and gene regulation. The structure and distribution of these elements are well-defined and therefore computational approaches can be used to identify MITEs sequences. RESULTS Here we describe MITE Tracker, a novel, open source software program that finds and classifies MITEs using an efficient alignment strategy to retrieve nearby inverted-repeat sequences from large genomes. This program groups them into high sequence homology families using a fast clustering algorithm and finally filters only those elements that were likely transposed from different genomic locations because of their low scoring flanking sequence alignment. CONCLUSIONS Many programs have been proposed to find MITEs hidden in genomes. However, none of them are able to process large-scale genomes such as that of bread wheat. Furthermore, in many cases the existing methods perform high false-positive rates (or miss rates). The rice genome was used as reference to compare MITE Tracker against known tools. Our method turned out to be the most reliable in our tests. Indeed, it revealed more known elements, presented the lowest false-positive number and was the only program able to run with the bread wheat genome as input. In wheat, MITE Tracker discovered 6013 MITE families and allowed the first structural exploration of MITEs in the complete bread wheat genome.
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Affiliation(s)
- Juan Manuel Crescente
- Grupo Biotecnología y Recursos Genéticos, EEA INTA Marcos Juárez, Ruta 12 km 3, 2580, Marcos Juárez, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Diego Zavallo
- Instituto de Biotecnología, CNIA, Instituto Nacional de Tecnología Agropecuaria (INTA) Castelar, Los Reseros y Nicolas Repeto, Hurlingham, Buenos Aires, Argentina
| | - Marcelo Helguera
- Grupo Biotecnología y Recursos Genéticos, EEA INTA Marcos Juárez, Ruta 12 km 3, 2580, Marcos Juárez, Argentina
| | - Leonardo Sebastián Vanzetti
- Grupo Biotecnología y Recursos Genéticos, EEA INTA Marcos Juárez, Ruta 12 km 3, 2580, Marcos Juárez, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
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15
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Liu Q, Ding C, Chu Y, Zhang W, Guo G, Chen J, Su X. Pln24NT: a web resource for plant 24-nt siRNA producing loci. Bioinformatics 2018; 33:2065-2067. [PMID: 28203705 DOI: 10.1093/bioinformatics/btx096] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 02/10/2017] [Indexed: 11/12/2022] Open
Abstract
Abstract In plants, 24 nucleotide small interfering RNAs (24-nt siRNAs) account for a large percentage of the total siRNA pool, and they play an important role in guiding plant-specific RNA-directed DNA methylation (RdDM), which transcriptionally silences transposon elements, transgenes, repetitive sequences and some endogenous genes. Several loci in plant genomes produce clusters of 24-nt RNAs, and these loci are receiving increasing attention from the research community. However, at present there is no bioinformatics resource dedicated to 24-nt siRNA loci and their derived 24-nt siRNAs. Thus, in this study, Pln24NT, a freely available web resource, was created to centralize 24-nt siRNA loci and 24-nt siRNA information, including fundamental locus information, expression profiles and annotation of transposon elements, from next-generation sequencing (NGS) data for 10 popular plant species. An intuitive web interface was also developed for convenient searching and browsing, and analytical tools were included to help users flexibly analyze their own siRNA NGS data. Pln24NT will help the plant research community to discover and characterize 24-nt siRNAs, and may prove useful for studying the roles of siRNA in RNA-directed DNA methylation in plants. Availability and Implementation http://bioinformatics.caf.ac.cn/Pln24NT . Contact suxh@caf.ac.cn. Supplementary information Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- Qi Liu
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Beijing, China
| | - Changjun Ding
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Beijing, China
| | - Yanguang Chu
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Beijing, China
| | - Weixi Zhang
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Beijing, China
| | - Ganggang Guo
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jiafei Chen
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Beijing, China
| | - Xiaohua Su
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Beijing, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
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16
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Distinguishing friends, foes, and freeloaders in giant genomes. Curr Opin Genet Dev 2018; 49:49-55. [DOI: 10.1016/j.gde.2018.02.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 02/23/2018] [Accepted: 02/26/2018] [Indexed: 12/11/2022]
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17
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Beliveau BJ, Kishi JY, Nir G, Sasaki HM, Saka SK, Nguyen SC, Wu CT, Yin P. OligoMiner provides a rapid, flexible environment for the design of genome-scale oligonucleotide in situ hybridization probes. Proc Natl Acad Sci U S A 2018; 115:E2183-E2192. [PMID: 29463736 PMCID: PMC5877937 DOI: 10.1073/pnas.1714530115] [Citation(s) in RCA: 140] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Oligonucleotide (oligo)-based FISH has emerged as an important tool for the study of chromosome organization and gene expression and has been empowered by the commercial availability of highly complex pools of oligos. However, a dedicated bioinformatic design utility has yet to be created specifically for the purpose of identifying optimal oligo FISH probe sequences on the genome-wide scale. Here, we introduce OligoMiner, a rapid and robust computational pipeline for the genome-scale design of oligo FISH probes that affords the scientist exact control over the parameters of each probe. Our streamlined method uses standard bioinformatic file formats, allowing users to seamlessly integrate new and existing utilities into the pipeline as desired, and introduces a method for evaluating the specificity of each probe molecule that connects simulated hybridization energetics to rapidly generated sequence alignments using supervised machine learning. We demonstrate the scalability of our approach by performing genome-scale probe discovery in numerous model organism genomes and showcase the performance of the resulting probes with diffraction-limited and single-molecule superresolution imaging of chromosomal and RNA targets. We anticipate that this pipeline will make the FISH probe design process much more accessible and will more broadly facilitate the design of pools of hybridization probes for a variety of applications.
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Affiliation(s)
- Brian J Beliveau
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115;
- Department of Systems Biology, Harvard Medical School, Boston, MA 02115
| | - Jocelyn Y Kishi
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115
- Department of Systems Biology, Harvard Medical School, Boston, MA 02115
| | - Guy Nir
- Department of Genetics, Harvard Medical School, Boston, MA 02115
| | - Hiroshi M Sasaki
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115
- Department of Systems Biology, Harvard Medical School, Boston, MA 02115
| | - Sinem K Saka
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115
- Department of Systems Biology, Harvard Medical School, Boston, MA 02115
| | - Son C Nguyen
- Department of Genetics, Harvard Medical School, Boston, MA 02115
| | - Chao-Ting Wu
- Department of Genetics, Harvard Medical School, Boston, MA 02115
| | - Peng Yin
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115;
- Department of Systems Biology, Harvard Medical School, Boston, MA 02115
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18
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El Baidouri M, Kim KD, Abernathy B, Li YH, Qiu LJ, Jackson SA. Genic C-Methylation in Soybean Is Associated with Gene Paralogs Relocated to Transposable Element-Rich Pericentromeres. MOLECULAR PLANT 2018; 11:485-495. [PMID: 29476915 DOI: 10.1016/j.molp.2018.02.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 02/15/2018] [Accepted: 02/15/2018] [Indexed: 06/08/2023]
Abstract
Most plants are polyploid due to whole-genome duplications (WGD) and can thus have duplicated genes. Following a WGD, paralogs are often fractionated (lost) and few duplicate pairs remain. Little attention has been paid to the role of DNA methylation in the functional divergence of paralogous genes. Using high-resolution methylation maps of accessions of domesticated and wild soybean, we show that in soybean, a recent paleopolyploid with many paralogs, DNA methylation likely contributed to the elimination of genetic redundancy of polyploidy-derived gene paralogs. Transcriptionally silenced paralogs exhibit particular genomic features as they are often associated with proximal transposable elements (TEs) and are preferentially located in pericentromeres, likely due to gene movement during evolution. Additionally, we provide evidence that gene methylation associated with proximal TEs is implicated in the divergence of expression profiles between orthologous genes of wild and domesticated soybean, and within populations.
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Affiliation(s)
- Moaine El Baidouri
- Center for Applied Genetic Technologies, University of Georgia, 111 Riverbend Road, Athens, GA 30602, USA.
| | - Kyung Do Kim
- Center for Applied Genetic Technologies, University of Georgia, 111 Riverbend Road, Athens, GA 30602, USA; Corporate R&D, LG Chem, LG Science Park, 30 Magokjungang 10-ro, Gangseo-gu, Seoul 07796, Republic of Korea.
| | - Brian Abernathy
- Center for Applied Genetic Technologies, University of Georgia, 111 Riverbend Road, Athens, GA 30602, USA
| | - Ying-Hui Li
- The National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Li-Juan Qiu
- The National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Scott A Jackson
- Center for Applied Genetic Technologies, University of Georgia, 111 Riverbend Road, Athens, GA 30602, USA.
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19
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Arkhipova IR, Yushenova IA, Rodriguez F. Giant Reverse Transcriptase-Encoding Transposable Elements at Telomeres. Mol Biol Evol 2017; 34:2245-2257. [PMID: 28575409 PMCID: PMC5850863 DOI: 10.1093/molbev/msx159] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Transposable elements are omnipresent in eukaryotic genomes and have a profound impact on chromosome structure, function and evolution. Their structural and functional diversity is thought to be reasonably well-understood, especially in retroelements, which transpose via an RNA intermediate copied into cDNA by the element-encoded reverse transcriptase, and are characterized by a compact structure. Here, we report a novel type of expandable eukaryotic retroelements, which we call Terminons. These elements can attach to G-rich telomeric repeat overhangs at the chromosome ends, in a process apparently facilitated by complementary C-rich repeats at the 3′-end of the RNA template immediately adjacent to a hammerhead ribozyme motif. Terminon units, which can exceed 40 kb in length, display an unusually complex and diverse structure, and can form very long chains, with host genes often captured between units. As the principal polymerizing component, Terminons contain Athena reverse transcriptases previously described in bdelloid rotifers and belonging to the enigmatic group of Penelope-like elements, but can additionally accumulate multiple cooriented ORFs, including DEDDy 3′-exonucleases, GDSL esterases/lipases, GIY-YIG-like endonucleases, rolling-circle replication initiator (Rep) proteins, and putatively structural ORFs with coiled-coil motifs and transmembrane domains. The extraordinary length and complexity of Terminons and the high degree of interfamily variability in their ORF content challenge the current views on the structural organization of eukaryotic retroelements, and highlight their possible connections with the viral world and the implications for the elevated frequency of gene transfer.
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Affiliation(s)
- Irina R Arkhipova
- Marine Biological Laboratory, Josephine Bay Paul Center for Comparative Molecular Biology and Evolution, Woods Hole, MA
| | - Irina A Yushenova
- Marine Biological Laboratory, Josephine Bay Paul Center for Comparative Molecular Biology and Evolution, Woods Hole, MA
| | - Fernando Rodriguez
- Marine Biological Laboratory, Josephine Bay Paul Center for Comparative Molecular Biology and Evolution, Woods Hole, MA
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20
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Bowman JL, Kohchi T, Yamato KT, Jenkins J, Shu S, Ishizaki K, Yamaoka S, Nishihama R, Nakamura Y, Berger F, Adam C, Aki SS, Althoff F, Araki T, Arteaga-Vazquez MA, Balasubrmanian S, Barry K, Bauer D, Boehm CR, Briginshaw L, Caballero-Perez J, Catarino B, Chen F, Chiyoda S, Chovatia M, Davies KM, Delmans M, Demura T, Dierschke T, Dolan L, Dorantes-Acosta AE, Eklund DM, Florent SN, Flores-Sandoval E, Fujiyama A, Fukuzawa H, Galik B, Grimanelli D, Grimwood J, Grossniklaus U, Hamada T, Haseloff J, Hetherington AJ, Higo A, Hirakawa Y, Hundley HN, Ikeda Y, Inoue K, Inoue SI, Ishida S, Jia Q, Kakita M, Kanazawa T, Kawai Y, Kawashima T, Kennedy M, Kinose K, Kinoshita T, Kohara Y, Koide E, Komatsu K, Kopischke S, Kubo M, Kyozuka J, Lagercrantz U, Lin SS, Lindquist E, Lipzen AM, Lu CW, De Luna E, Martienssen RA, Minamino N, Mizutani M, Mizutani M, Mochizuki N, Monte I, Mosher R, Nagasaki H, Nakagami H, Naramoto S, Nishitani K, Ohtani M, Okamoto T, Okumura M, Phillips J, Pollak B, Reinders A, Rövekamp M, Sano R, Sawa S, Schmid MW, Shirakawa M, Solano R, Spunde A, Suetsugu N, Sugano S, Sugiyama A, Sun R, Suzuki Y, Takenaka M, Takezawa D, Tomogane H, Tsuzuki M, Ueda T, Umeda M, Ward JM, Watanabe Y, Yazaki K, Yokoyama R, Yoshitake Y, Yotsui I, Zachgo S, Schmutz J. Insights into Land Plant Evolution Garnered from the Marchantia polymorpha Genome. Cell 2017; 171:287-304.e15. [PMID: 28985561 DOI: 10.1016/j.cell.2017.09.030] [Citation(s) in RCA: 731] [Impact Index Per Article: 104.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2016] [Revised: 04/21/2017] [Accepted: 09/18/2017] [Indexed: 02/01/2023]
Abstract
The evolution of land flora transformed the terrestrial environment. Land plants evolved from an ancestral charophycean alga from which they inherited developmental, biochemical, and cell biological attributes. Additional biochemical and physiological adaptations to land, and a life cycle with an alternation between multicellular haploid and diploid generations that facilitated efficient dispersal of desiccation tolerant spores, evolved in the ancestral land plant. We analyzed the genome of the liverwort Marchantia polymorpha, a member of a basal land plant lineage. Relative to charophycean algae, land plant genomes are characterized by genes encoding novel biochemical pathways, new phytohormone signaling pathways (notably auxin), expanded repertoires of signaling pathways, and increased diversity in some transcription factor families. Compared with other sequenced land plants, M. polymorpha exhibits low genetic redundancy in most regulatory pathways, with this portion of its genome resembling that predicted for the ancestral land plant. PAPERCLIP.
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Affiliation(s)
- John L Bowman
- School of Biological Sciences, Monash University, Melbourne VIC 3800, Australia.
| | - Takayuki Kohchi
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan.
| | - Katsuyuki T Yamato
- Faculty of Biology-Oriented Science and Technology, Kindai University, 930 Nishimitani, Kinokawa, Wakayama 649-6493, Japan.
| | - Jerry Jenkins
- Department of Energy Joint Genome Institute, Walnut Creek, CA, USA; HudsonAlpha Institute of Biotechnology, Huntsville, AL, USA
| | - Shengqiang Shu
- Department of Energy Joint Genome Institute, Walnut Creek, CA, USA
| | | | - Shohei Yamaoka
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Ryuichi Nishihama
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Yasukazu Nakamura
- National Institute of Genetics, Research Organization of Information and Systems, Yata, Mishima 411-8540, Japan
| | - Frédéric Berger
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences, Vienna Biocenter (VBC), Dr. Bohr-Gasse 3, 1030 Vienna, Austria
| | - Catherine Adam
- Department of Energy Joint Genome Institute, Walnut Creek, CA, USA
| | - Shiori Sugamata Aki
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, Takayama 8916-5, Ikoma, Nara 630-0192, Japan
| | - Felix Althoff
- Botany Department, University of Osnabrück, Barbarastr. 11, D-49076 Osnabrück, Germany
| | - Takashi Araki
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Mario A Arteaga-Vazquez
- Universidad Veracruzana, INBIOTECA - Instituto de Biotecnología y Ecología Aplicada, Av. de las Culturas Veracruzanas No.101, Colonia Emiliano Zapata, 91090, Xalapa, Veracruz, México
| | | | - Kerrie Barry
- Department of Energy Joint Genome Institute, Walnut Creek, CA, USA
| | - Diane Bauer
- Department of Energy Joint Genome Institute, Walnut Creek, CA, USA
| | - Christian R Boehm
- Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA, United Kingdom
| | - Liam Briginshaw
- School of Biological Sciences, Monash University, Melbourne VIC 3800, Australia
| | - Juan Caballero-Perez
- National Laboratory of Genomics for Biodiversity, CINVESTAV-IPN, Km 9.6 Lib. Norte Carr. Irapuato-León, 36821, Irapuato, Guanajuato, México
| | - Bruno Catarino
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford, OX1 3RB, UK
| | - Feng Chen
- Department of Plant Sciences, University of Tennessee, Knoxville, TN, USA
| | - Shota Chiyoda
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Mansi Chovatia
- Department of Energy Joint Genome Institute, Walnut Creek, CA, USA
| | - Kevin M Davies
- The New Zealand Institute for Plant & Food Research Limited, Private Bag 11-600, Palmerston North, New Zealand
| | - Mihails Delmans
- Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA, United Kingdom
| | - Taku Demura
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, Takayama 8916-5, Ikoma, Nara 630-0192, Japan
| | - Tom Dierschke
- School of Biological Sciences, Monash University, Melbourne VIC 3800, Australia; Botany Department, University of Osnabrück, Barbarastr. 11, D-49076 Osnabrück, Germany
| | - Liam Dolan
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford, OX1 3RB, UK
| | - Ana E Dorantes-Acosta
- Universidad Veracruzana, INBIOTECA - Instituto de Biotecnología y Ecología Aplicada, Av. de las Culturas Veracruzanas No.101, Colonia Emiliano Zapata, 91090, Xalapa, Veracruz, México
| | - D Magnus Eklund
- School of Biological Sciences, Monash University, Melbourne VIC 3800, Australia; Department of Plant Ecology and Evolution, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, SE-75236 Uppsala, Sweden
| | - Stevie N Florent
- School of Biological Sciences, Monash University, Melbourne VIC 3800, Australia
| | | | - Asao Fujiyama
- National Institute of Genetics, Research Organization of Information and Systems, Yata, Mishima 411-8540, Japan
| | - Hideya Fukuzawa
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Bence Galik
- Bioinformatics & Scientific Computing, Vienna Biocenter Core Facilities (VBCF), Dr. Bohr-Gasse 3, 1030 Vienna, Austria
| | - Daniel Grimanelli
- Institut de Recherche pour le Développement (IRD), UMR232, Université de Montpellier, Montpellier 34394, France
| | - Jane Grimwood
- Department of Energy Joint Genome Institute, Walnut Creek, CA, USA; HudsonAlpha Institute of Biotechnology, Huntsville, AL, USA
| | - Ueli Grossniklaus
- Department of Plant and Microbial Biology and Zurich-Basel Plant Science Center, University of Zurich, 8008 Zürich, Switzerland
| | - Takahiro Hamada
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153-8902 Japan
| | - Jim Haseloff
- Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA, United Kingdom
| | | | - Asuka Higo
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Yuki Hirakawa
- School of Biological Sciences, Monash University, Melbourne VIC 3800, Australia; Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan; Department of Life Science, Faculty of Science, Gakushuin University, Tokyo 171-8588, Japan
| | - Hope N Hundley
- Department of Energy Joint Genome Institute, Walnut Creek, CA, USA
| | - Yoko Ikeda
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, Okayama 710-0046, Japan
| | - Keisuke Inoue
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Shin-Ichiro Inoue
- Division of Biological Science, Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Sakiko Ishida
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Qidong Jia
- Department of Plant Sciences, University of Tennessee, Knoxville, TN, USA
| | - Mitsuru Kakita
- Division of Biological Science, Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Takehiko Kanazawa
- National Institute for Basic Biology, 38 Nishigounaka, Myodaiji, Okazaki 444-8585, Japan; Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yosuke Kawai
- Department of Integrative Genomics, Tohoku Medical Bank Organization, Tohoku University, Aoba, Sendai 980-8573, Japan
| | - Tomokazu Kawashima
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences, Vienna Biocenter (VBC), Dr. Bohr-Gasse 3, 1030 Vienna, Austria; Department of Plant and Soil Sciences, University of Kentucky, 321 Plant Science Building, 1405 Veterans Dr., Lexington, KY 40546, USA
| | - Megan Kennedy
- Department of Energy Joint Genome Institute, Walnut Creek, CA, USA
| | - Keita Kinose
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Toshinori Kinoshita
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan; Department of Life Science, Faculty of Science, Gakushuin University, Tokyo 171-8588, Japan; Division of Biological Science, Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Yuji Kohara
- National Institute of Genetics, Research Organization of Information and Systems, Yata, Mishima 411-8540, Japan
| | - Eri Koide
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Kenji Komatsu
- Department of Bioproduction Technology, Junior College of Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Sarah Kopischke
- Botany Department, University of Osnabrück, Barbarastr. 11, D-49076 Osnabrück, Germany
| | - Minoru Kubo
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, Takayama 8916-5, Ikoma, Nara 630-0192, Japan
| | - Junko Kyozuka
- Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan
| | - Ulf Lagercrantz
- Department of Plant Ecology and Evolution, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, SE-75236 Uppsala, Sweden
| | - Shih-Shun Lin
- Institute of Biotechnology, National Taiwan University, Taipei, Taiwan
| | - Erika Lindquist
- Department of Energy Joint Genome Institute, Walnut Creek, CA, USA
| | - Anna M Lipzen
- Department of Energy Joint Genome Institute, Walnut Creek, CA, USA
| | - Chia-Wei Lu
- Institute of Biotechnology, National Taiwan University, Taipei, Taiwan
| | - Efraín De Luna
- Instituto de Ecología, AC., Red de Biodiversidad y Sistemática, Xalapa, Veracruz, 91000, México
| | | | - Naoki Minamino
- National Institute for Basic Biology, 38 Nishigounaka, Myodaiji, Okazaki 444-8585, Japan; Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masaharu Mizutani
- Graduate School of Agricultural Science, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan
| | - Miya Mizutani
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | | | - Isabel Monte
- Department Genética Molecular de Plantas, Centro Nacional de Biotecnologia-CSIC, Universidad Autónoma de Madrid 28049 Madrid. Spain
| | - Rebecca Mosher
- The School of Plant Sciences, The University of Arizona, Tuscon, AZ, USA
| | - Hideki Nagasaki
- National Institute of Genetics, Research Organization of Information and Systems, Yata, Mishima 411-8540, Japan; Department of Technology Development, Kazusa DNA Research Institute, Kisarazu, Chiba 292-0818, Japan
| | - Hirofumi Nakagami
- RIKEN Center for Sustainable Resource Science, Yokohama 230-0045, Japan; Max Planck Institute for Plant Breeding Research, 50829 Cologne, Germany
| | - Satoshi Naramoto
- Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan
| | - Kazuhiko Nishitani
- Laboratory of Plant Cell Wall Biology, Graduate School of Life Sciences, Tohoku University, Aoba, Sendai 980-8578, Japan
| | - Misato Ohtani
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, Takayama 8916-5, Ikoma, Nara 630-0192, Japan
| | - Takashi Okamoto
- Department of Biological Sciences, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - Masaki Okumura
- Division of Biological Science, Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Jeremy Phillips
- Department of Energy Joint Genome Institute, Walnut Creek, CA, USA
| | - Bernardo Pollak
- Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA, United Kingdom
| | - Anke Reinders
- Department of Plant and Microbial Biology, University of Minnesota, St. Paul, MN, USA
| | - Moritz Rövekamp
- Department of Plant and Microbial Biology and Zurich-Basel Plant Science Center, University of Zurich, 8008 Zürich, Switzerland
| | - Ryosuke Sano
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, Takayama 8916-5, Ikoma, Nara 630-0192, Japan
| | - Shinichiro Sawa
- Graduate school of Science and Technology, Kumamoto University, Kurokami 2-39-1, Kumamoto 860-8555, Japan
| | - Marc W Schmid
- Department of Plant and Microbial Biology and Zurich-Basel Plant Science Center, University of Zurich, 8008 Zürich, Switzerland
| | - Makoto Shirakawa
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Roberto Solano
- Department Genética Molecular de Plantas, Centro Nacional de Biotecnologia-CSIC, Universidad Autónoma de Madrid 28049 Madrid. Spain
| | - Alexander Spunde
- Department of Energy Joint Genome Institute, Walnut Creek, CA, USA
| | - Noriyuki Suetsugu
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Sumio Sugano
- Department of Computational Biology and Medical Sciences, the University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8562 Japan
| | - Akifumi Sugiyama
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - Rui Sun
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Yutaka Suzuki
- Department of Computational Biology and Medical Sciences, the University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8562 Japan
| | | | - Daisuke Takezawa
- Graduate School of Science and Engineering and Institute for Environmental Science and Technology, Saitama University, Saitama 338-8570, Japan
| | - Hirokazu Tomogane
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Masayuki Tsuzuki
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153-8902 Japan
| | - Takashi Ueda
- National Institute for Basic Biology, 38 Nishigounaka, Myodaiji, Okazaki 444-8585, Japan
| | - Masaaki Umeda
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, Takayama 8916-5, Ikoma, Nara 630-0192, Japan
| | - John M Ward
- Department of Plant and Microbial Biology, University of Minnesota, St. Paul, MN, USA
| | - Yuichiro Watanabe
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153-8902 Japan
| | - Kazufumi Yazaki
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - Ryusuke Yokoyama
- Laboratory of Plant Cell Wall Biology, Graduate School of Life Sciences, Tohoku University, Aoba, Sendai 980-8578, Japan
| | | | - Izumi Yotsui
- RIKEN Center for Sustainable Resource Science, Yokohama 230-0045, Japan
| | - Sabine Zachgo
- Botany Department, University of Osnabrück, Barbarastr. 11, D-49076 Osnabrück, Germany
| | - Jeremy Schmutz
- Department of Energy Joint Genome Institute, Walnut Creek, CA, USA; HudsonAlpha Institute of Biotechnology, Huntsville, AL, USA
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21
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Michael TP, Bryant D, Gutierrez R, Borisjuk N, Chu P, Zhang H, Xia J, Zhou J, Peng H, El Baidouri M, Ten Hallers B, Hastie AR, Liang T, Acosta K, Gilbert S, McEntee C, Jackson SA, Mockler TC, Zhang W, Lam E. Comprehensive definition of genome features in Spirodela polyrhiza by high-depth physical mapping and short-read DNA sequencing strategies. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2017; 89:617-635. [PMID: 27754575 DOI: 10.1111/tpj.13400] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Revised: 10/05/2016] [Accepted: 10/07/2016] [Indexed: 05/15/2023]
Abstract
Spirodela polyrhiza is a fast-growing aquatic monocot with highly reduced morphology, genome size and number of protein-coding genes. Considering these biological features of Spirodela and its basal position in the monocot lineage, understanding its genome architecture could shed light on plant adaptation and genome evolution. Like many draft genomes, however, the 158-Mb Spirodela genome sequence has not been resolved to chromosomes, and important genome characteristics have not been defined. Here we deployed rapid genome-wide physical maps combined with high-coverage short-read sequencing to resolve the 20 chromosomes of Spirodela and to empirically delineate its genome features. Our data revealed a dramatic reduction in the number of the rDNA repeat units in Spirodela to fewer than 100, which is even fewer than that reported for yeast. Consistent with its unique phylogenetic position, small RNA sequencing revealed 29 Spirodela-specific microRNA, with only two being shared with Elaeis guineensis (oil palm) and Musa balbisiana (banana). Combining DNA methylation data and small RNA sequencing enabled the accurate prediction of 20.5% long terminal repeats (LTRs) that doubled the previous estimate, and revealed a high Solo:Intact LTR ratio of 8.2. Interestingly, we found that Spirodela has the lowest global DNA methylation levels (9%) of any plant species tested. Taken together our results reveal a genome that has undergone reduction, likely through eliminating non-essential protein coding genes, rDNA and LTRs. In addition to delineating the genome features of this unique plant, the methodologies described and large-scale genome resources from this work will enable future evolutionary and functional studies of this basal monocot family.
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Affiliation(s)
- Todd P Michael
- Department of Plant Biology & Pathology, Rutgers University, New Brunswick, NJ, USA
- IBIS Bioscience, Carlsbad, CA, USA
| | - Douglas Bryant
- IBIS Bioscience, Carlsbad, CA, USA
- Donald Danforth Center for Plant Science, St. Louis, MO, USA
| | - Ryan Gutierrez
- Department of Plant Biology & Pathology, Rutgers University, New Brunswick, NJ, USA
| | - Nikolai Borisjuk
- Department of Plant Biology & Pathology, Rutgers University, New Brunswick, NJ, USA
| | - Philomena Chu
- Department of Plant Biology & Pathology, Rutgers University, New Brunswick, NJ, USA
| | - Hanzhong Zhang
- Department of Plant Biology & Pathology, Rutgers University, New Brunswick, NJ, USA
| | - Jing Xia
- Institute for Systems Biology, Jianghan University, Wuhan, China
- Department of Computer Science and Engineering, Washington University, St. Louis, MO, USA
| | - Junfei Zhou
- Institute for Systems Biology, Jianghan University, Wuhan, China
| | - Hai Peng
- Institute for Systems Biology, Jianghan University, Wuhan, China
| | - Moaine El Baidouri
- Center for Applied Genetic Technologies, University of Georgia, Athens, GA, USA
| | | | | | | | - Kenneth Acosta
- Department of Plant Biology & Pathology, Rutgers University, New Brunswick, NJ, USA
| | - Sarah Gilbert
- Department of Plant Biology & Pathology, Rutgers University, New Brunswick, NJ, USA
| | | | - Scott A Jackson
- Center for Applied Genetic Technologies, University of Georgia, Athens, GA, USA
| | - Todd C Mockler
- Donald Danforth Center for Plant Science, St. Louis, MO, USA
| | - Weixiong Zhang
- Institute for Systems Biology, Jianghan University, Wuhan, China
- Department of Computer Science and Engineering, Washington University, St. Louis, MO, USA
| | - Eric Lam
- Department of Plant Biology & Pathology, Rutgers University, New Brunswick, NJ, USA
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22
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Multitasking of the piRNA Silencing Machinery: Targeting Transposable Elements and Foreign Genes in the Bdelloid Rotifer Adineta vaga. Genetics 2016; 203:255-68. [PMID: 27017627 DOI: 10.1534/genetics.116.186734] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2016] [Accepted: 03/21/2016] [Indexed: 12/12/2022] Open
Abstract
RNA-mediated silencing processes play a key role in silencing of transposable elements, especially in the germ line, where piwi-interacting RNAs (piRNAs) are responsible for suppressing transposon mobility and maintaining genome integrity. We previously reported that the genome of Adineta vaga, the first sequenced representative of the phylum Rotifera (class Bdelloidea), is characterized by massive levels of horizontal gene transfer, by unusually low transposon content, and by highly diversified RNA-mediated silencing machinery. Here, we investigate genome-wide distribution of pi-like small RNAs, which in A. vaga are 25-31 nucleotides in length and have a strong 5'-uridine bias, while lacking ping-pong amplification signatures. In agreement with expectations, 71% of mapped reads corresponded to annotated transposons, with 93% of these reads being in the antisense orientation. Unexpectedly, a significant fraction of piRNAs originate from predicted coding regions corresponding to genes of putatively foreign origin. The distribution of piRNAs across foreign genes is not biased toward 3'-UTRs, instead resembling transposons in uniform distribution pattern throughout the gene body, and in predominantly antisense orientation. We also find that genes with small RNA coverage, including a number of genes of metazoan origin, are characterized by higher occurrence of telomeric repeats in the surrounding genomic regions, and by higher density of transposons in the vicinity, which have the potential to promote antisense transcription. Our findings highlight the complex interplay between RNA-based silencing processes and acquisition of genes at the genome periphery, which can result either in their loss or eventual domestication and integration into the host genome.
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23
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Hoen DR, Hickey G, Bourque G, Casacuberta J, Cordaux R, Feschotte C, Fiston-Lavier AS, Hua-Van A, Hubley R, Kapusta A, Lerat E, Maumus F, Pollock DD, Quesneville H, Smit A, Wheeler TJ, Bureau TE, Blanchette M. A call for benchmarking transposable element annotation methods. Mob DNA 2015; 6:13. [PMID: 26244060 PMCID: PMC4524446 DOI: 10.1186/s13100-015-0044-6] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Accepted: 07/22/2015] [Indexed: 12/31/2022] Open
Abstract
DNA derived from transposable elements (TEs) constitutes large parts of the genomes of complex eukaryotes, with major impacts not only on genomic research but also on how organisms evolve and function. Although a variety of methods and tools have been developed to detect and annotate TEs, there are as yet no standard benchmarks-that is, no standard way to measure or compare their accuracy. This lack of accuracy assessment calls into question conclusions from a wide range of research that depends explicitly or implicitly on TE annotation. In the absence of standard benchmarks, toolmakers are impeded in improving their tools, annotators cannot properly assess which tools might best suit their needs, and downstream researchers cannot judge how accuracy limitations might impact their studies. We therefore propose that the TE research community create and adopt standard TE annotation benchmarks, and we call for other researchers to join the authors in making this long-overdue effort a success.
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Affiliation(s)
- Douglas R Hoen
- School of Computer Science, McGill University, McConnell Engineering Bldg., Rm. 318, 3480 Rue University, Montréal, Québec H3A 0E9 Canada ; Department of Biology, McGill University, Stewart Biology Bldg., 1205 Ave. du Docteur-Penfield, Montréal, Québec H3A 1B1 Canada
| | - Glenn Hickey
- School of Computer Science, McGill University, McConnell Engineering Bldg., Rm. 318, 3480 Rue University, Montréal, Québec H3A 0E9 Canada ; McGill Centre for Bioinformatics, McGill University, Montréal, Québec Canada
| | - Guillaume Bourque
- Department of Human Genetics, McGill University, Montréal, Québec Canada ; McGill University and Génome Québec Innovation Center, Montréal, Québec Canada
| | - Josep Casacuberta
- Centre for Research in Agricultural Genomics CSIC-IRTA-UAB-UB, 08193 Barcelona, Spain
| | - Richard Cordaux
- Université de Poitiers, UMR CNRS 7267 Ecologie et Biologie des Interactions, Equipe Ecologie Evolution Symbiose, 5 Rue Albert Turpin, 86073 Poitiers Cedex 9, France
| | - Cédric Feschotte
- Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, UT 84112 USA
| | - Anna-Sophie Fiston-Lavier
- Institut des Sciences de l'Evolution de Montpellier (ISE-M), Equipe Evolution, Vecteurs, Adaptation et Symbiose, UMR5554 CNRS-Université Montpellier, Montpellier, 34090 cedex 05 France
| | - Aurélie Hua-Van
- Laboratoire Evolution, Génomes, Comportement Ecologie, CNRS-Université Paris-Sud (UMR 9191)-IRD (UMR 247)-Université Paris-Saclay, F-91198 Gif-sur-Yvette, France
| | - Robert Hubley
- Institute for Systems Biology, 401 Terry Ave. N, Seattle, WA 98109 USA
| | - Aurélie Kapusta
- Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, UT 84112 USA
| | - Emmanuelle Lerat
- Laboratoire Biometrie et Biologie Evolutive, Universite Claude Bernard-Lyon 1, UMR-CNRS 5558-Bat. Mendel, 43 bd du 11 novembre 1918, 69622 Villeurbanne cedex, France
| | - Florian Maumus
- INRA, UR1164 URGI-Research Unit in Genomics-Info, INRA de Versailles-Grignon, Route de Saint-Cyr, Versailles, 78026 France
| | - David D Pollock
- University of Colorado School of Medicine, Aurora, CO 80045 USA
| | - Hadi Quesneville
- INRA, UR1164 URGI-Research Unit in Genomics-Info, INRA de Versailles-Grignon, Route de Saint-Cyr, Versailles, 78026 France
| | - Arian Smit
- Institute for Systems Biology, 401 Terry Ave. N, Seattle, WA 98109 USA
| | - Travis J Wheeler
- Department of Computer Science, University of Montana, Missoula, MT 59812 USA
| | - Thomas E Bureau
- Department of Biology, McGill University, Stewart Biology Bldg., 1205 Ave. du Docteur-Penfield, Montréal, Québec H3A 1B1 Canada
| | - Mathieu Blanchette
- School of Computer Science, McGill University, McConnell Engineering Bldg., Rm. 318, 3480 Rue University, Montréal, Québec H3A 0E9 Canada ; McGill Centre for Bioinformatics, McGill University, Montréal, Québec Canada
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