1
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Cooper C, Legood S, Wheat RL, Forrest D, Sharma P, Haycocks JRJ, Grainger DC. H-NS is a bacterial transposon capture protein. Nat Commun 2024; 15:7137. [PMID: 39164300 PMCID: PMC11335895 DOI: 10.1038/s41467-024-51407-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Accepted: 08/05/2024] [Indexed: 08/22/2024] Open
Abstract
The histone-like nucleoid structuring (H-NS) protein is a DNA binding factor, found in gammaproteobacteria, with functional equivalents in diverse microbes. Universally, such proteins are understood to silence transcription of horizontally acquired genes. Here, we identify transposon capture as a major overlooked function of H-NS. Using genome-scale approaches, we show that H-NS bound regions are transposition "hotspots". Since H-NS often interacts with pathogenicity islands, such targeting creates clinically relevant phenotypic diversity. For example, in Acinetobacter baumannii, we identify altered motility, biofilm formation, and interactions with the human immune system. Transposon capture is mediated by the DNA bridging activity of H-NS and, if absent, more ubiquitous transposition results. Consequently, transcribed and essential genes are disrupted. Hence, H-NS directs transposition to favour evolutionary outcomes useful for the host cell.
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Affiliation(s)
- Charles Cooper
- School of Biosciences, University of Birmingham, Birmingham, UK
| | - Simon Legood
- School of Biosciences, University of Birmingham, Birmingham, UK
| | - Rachel L Wheat
- School of Biosciences, University of Birmingham, Birmingham, UK
| | - David Forrest
- School of Biosciences, University of Birmingham, Birmingham, UK
| | - Prateek Sharma
- School of Biosciences, University of Birmingham, Birmingham, UK
| | | | - David C Grainger
- School of Biosciences, University of Birmingham, Birmingham, UK.
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2
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Wang S, Jiang Y, Che L, Wang RH, Li SC. Enhancing insights into diseases through horizontal gene transfer event detection from gut microbiome. Nucleic Acids Res 2024; 52:e61. [PMID: 38884260 DOI: 10.1093/nar/gkae515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 04/23/2024] [Accepted: 06/04/2024] [Indexed: 06/18/2024] Open
Abstract
Horizontal gene transfer (HGT) phenomena pervade the gut microbiome and significantly impact human health. Yet, no current method can accurately identify complete HGT events, including the transferred sequence and the associated deletion and insertion breakpoints from shotgun metagenomic data. Here, we develop LocalHGT, which facilitates the reliable and swift detection of complete HGT events from shotgun metagenomic data, delivering an accuracy of 99.4%-verified by Nanopore data-across 200 gut microbiome samples, and achieving an average F1 score of 0.99 on 100 simulated data. LocalHGT enables a systematic characterization of HGT events within the human gut microbiome across 2098 samples, revealing that multiple recipient genome sites can become targets of a transferred sequence, microhomology is enriched in HGT breakpoint junctions (P-value = 3.3e-58), and HGTs can function as host-specific fingerprints indicated by the significantly higher HGT similarity of intra-personal temporal samples than inter-personal samples (P-value = 4.3e-303). Crucially, HGTs showed potential contributions to colorectal cancer (CRC) and acute diarrhoea, as evidenced by the enrichment of the butyrate metabolism pathway (P-value = 3.8e-17) and the shigellosis pathway (P-value = 5.9e-13) in the respective associated HGTs. Furthermore, differential HGTs demonstrated promise as biomarkers for predicting various diseases. Integrating HGTs into a CRC prediction model achieved an AUC of 0.87.
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Affiliation(s)
- Shuai Wang
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, China
- Department of Computer Science, City University of Hong Kong, Kowloon, Hong Kong
| | - Yiqi Jiang
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, China
- Department of Computer Science, City University of Hong Kong, Kowloon, Hong Kong
| | - Lijia Che
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, China
- Department of Computer Science, City University of Hong Kong, Kowloon, Hong Kong
| | - Ruo Han Wang
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, China
- Department of Computer Science, City University of Hong Kong, Kowloon, Hong Kong
| | - Shuai Cheng Li
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, China
- Department of Computer Science, City University of Hong Kong, Kowloon, Hong Kong
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3
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Cinar M, Martinez-Medina L, Puvvula P, Arakelyan A, Vardarajan B, Anthony N, Nagaraju G, Park D, Feng L, Sheff F, Mosunjac M, Saxe D, Flygare S, Alese O, Kaufman J, Lonial S, Sarmiento J, Lossos I, Vertino P, Lopez J, El-Rayes B, Bernal-Mizrachi L. Transposon DNA sequences facilitate the tissue-specific gene transfer of circulating tumor DNA between human cells. Nucleic Acids Res 2024; 52:7539-7555. [PMID: 38783375 PMCID: PMC11260451 DOI: 10.1093/nar/gkae427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 05/01/2024] [Accepted: 05/09/2024] [Indexed: 05/25/2024] Open
Abstract
The exchange of genes between cells is known to play an important physiological and pathological role in many organisms. We show that circulating tumor DNA (ctDNA) facilitates cell-specific gene transfer between human cancer cells and explain part of the mechanisms behind this phenomenon. As ctDNA migrates into the nucleus, genetic information is transferred. Cell targeting and ctDNA integration require ERVL, SINE or LINE DNA sequences. Chemically manufactured AluSp and MER11C sequences replicated multiple myeloma (MM) ctDNA cell targeting and integration. Additionally, we found that ctDNA may alter the treatment response of MM and pancreatic cancer models. This study shows that retrotransposon DNA sequences promote cancer gene transfer. However, because cell-free DNA has been detected in physiological and other pathological conditions, our findings have a broader impact than just cancer. Furthermore, the discovery that transposon DNA sequences mediate tissue-specific targeting will open up a new avenue for the delivery of genes and therapies.
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Affiliation(s)
- Munevver Cinar
- Department of Hematology and Medical Oncology, Winship Cancer Institute of Emory University, Atlanta, GA, USA
| | | | | | - Arsen Arakelyan
- Bioinformatics group, Institute of Molecular Biology NAS RA, Yerevan, Armenia
| | | | - Neil Anthony
- Integrated Cellular Imaging Core, Winship Cancer Institute of Emory University, Atlanta, GA, USA
| | - Ganji P Nagaraju
- Division of hematology and oncology, O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Dongkyoo Park
- Department of Hematology and Medical Oncology, Winship Cancer Institute of Emory University, Atlanta, GA, USA
| | - Lei Feng
- Kodikaz Therapeutic Solutions, Inc, New York, NY, USA
| | - Faith Sheff
- Pathology and Laboratory Medicine, Winship Cancer Institute of Emory University, Atlanta, GA, USA
| | - Marina Mosunjac
- Pathology and Laboratory Medicine, Winship Cancer Institute of Emory University, Atlanta, GA, USA
| | - Debra Saxe
- Pathology and Laboratory Medicine, Winship Cancer Institute of Emory University, Atlanta, GA, USA
| | - Steven Flygare
- Department of Computational Biology/ Genetics, The University of Utah, Salt Lake City, UT, USA
| | - Olatunji B Alese
- Department of Hematology and Medical Oncology, Winship Cancer Institute of Emory University, Atlanta, GA, USA
| | - Jonathan L Kaufman
- Department of Hematology and Medical Oncology, Winship Cancer Institute of Emory University, Atlanta, GA, USA
| | - Sagar Lonial
- Department of Hematology and Medical Oncology, Winship Cancer Institute of Emory University, Atlanta, GA, USA
| | - Juan M Sarmiento
- Department of Surgery, Winship Cancer Institute of Emory University, Atlanta, GA, USA
| | - Izidore S Lossos
- Department of Medicine, Division of Hematology-Oncology and Molecular and Cellular Pharmacology, Sylvester Comprehensive Cancer Center, University of Miami, Miami, FL, USA
| | - Paula M Vertino
- Department of Biomedical Genetics and the Wilmot Cancer Institute, University of Rochester Medical Center, Rochester, NY, USA
| | - Jose A Lopez
- Bloodworks Northwest Research Institute, Division of Hematology, University of Washington School of Medicine, Seattle, WA, USA
| | - Bassel El-Rayes
- Division of hematology and oncology, O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Leon Bernal-Mizrachi
- Department of Hematology and Medical Oncology, Winship Cancer Institute of Emory University, Atlanta, GA, USA
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4
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Žedaveinytė R, Meers C, Le HC, Mortman EE, Tang S, Lampe GD, Pesari SR, Gelsinger DR, Wiegand T, Sternberg SH. Antagonistic conflict between transposon-encoded introns and guide RNAs. Science 2024; 385:eadm8189. [PMID: 38991068 DOI: 10.1126/science.adm8189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 05/08/2024] [Indexed: 07/13/2024]
Abstract
TnpB nucleases represent the evolutionary precursors to CRISPR-Cas12 and are widespread in all domains of life. IS605-family TnpB homologs function as programmable RNA-guided homing endonucleases in bacteria, driving transposon maintenance through DNA double-strand break-stimulated homologous recombination. In this work, we uncovered molecular mechanisms of the transposition life cycle of IS607-family elements that, notably, also encode group I introns. We identified specific features for a candidate "IStron" from Clostridium botulinum that allow the element to carefully control the relative levels of spliced products versus functional guide RNAs. Our results suggest that IStron transcripts evolved an ability to balance competing and mutually exclusive activities that promote selfish transposon spread while limiting adverse fitness costs on the host. Collectively, this work highlights molecular innovation in the multifunctional utility of transposon-encoded noncoding RNAs.
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Affiliation(s)
- Rimantė Žedaveinytė
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA
| | - Chance Meers
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA
| | - Hoang C Le
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA
| | - Edan E Mortman
- Department of Genetics and Development, Columbia University, New York, NY 10032, USA
| | - Stephen Tang
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA
| | - George D Lampe
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA
| | - Sanjana R Pesari
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA
| | - Diego R Gelsinger
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA
| | - Tanner Wiegand
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA
| | - Samuel H Sternberg
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA
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5
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Xiang G, Li Y, Sun J, Huo Y, Cao S, Cao Y, Guo Y, Yang L, Cai Y, Zhang YE, Wang H. Evolutionary mining and functional characterization of TnpB nucleases identify efficient miniature genome editors. Nat Biotechnol 2024; 42:745-757. [PMID: 37386294 DOI: 10.1038/s41587-023-01857-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Accepted: 06/05/2023] [Indexed: 07/01/2023]
Abstract
As the evolutionary ancestor of Cas12 nuclease, the transposon (IS200/IS605)-encoded TnpB proteins act as compact RNA-guided DNA endonucleases. To explore their evolutionary diversity and potential as genome editors, we screened TnpBs from 64 annotated IS605 members and identified 25 active in Escherichia coli, of which three are active in human cells. Further characterization of these 25 TnpBs enables prediction of the transposon-associated motif (TAM) and the right-end element RNA (reRNA) directly from genomic sequences. We established a framework for annotating TnpB systems in prokaryotic genomes and applied it to identify 14 additional candidates. Among these, ISAam1 (369 amino acids (aa)) and ISYmu1 (382 aa) TnpBs demonstrated robust editing activity across dozens of genomic loci in human cells. Both RNA-guided genome editors demonstrated similar editing efficiency as SaCas9 (1,053 aa) while being substantially smaller. The enormous diversity of TnpBs holds potential for the discovery of additional valuable genome editors.
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Affiliation(s)
- Guanghai Xiang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China.
- Beijing Institute for Stem Cell and Regenerative Medicine, Beijing, China.
| | - Yuanqing Li
- Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Jing Sun
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yongyuan Huo
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Shiwei Cao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yuanwei Cao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yanyan Guo
- Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Ling Yang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yujia Cai
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yong E Zhang
- Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.
- University of Chinese Academy of Sciences, Beijing, China.
- CAS Center for Excellence in Animal Evolution and Genetics, Chinese Academy of Sciences, Kunming, China.
| | - Haoyi Wang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China.
- Beijing Institute for Stem Cell and Regenerative Medicine, Beijing, China.
- University of Chinese Academy of Sciences, Beijing, China.
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6
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Guillén-Chable F, Valdez Iuit JO, Avila Castro LA, Rosas C, Merino E, Rodríguez-Escamilla Z, Martínez-Núñez MA. Geographical distribution of mobile genetic elements in microbial communities along the Yucatan coast. PLoS One 2024; 19:e0301642. [PMID: 38683832 PMCID: PMC11057721 DOI: 10.1371/journal.pone.0301642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 03/19/2024] [Indexed: 05/02/2024] Open
Abstract
Horizontal gene transfer (HGT) is a well-documented strategy used by bacteria to enhance their adaptability to challenging environmental conditions. Through HGT, a group of conserved genetic elements known as mobile genetic elements (MGEs) is disseminated within bacterial communities. MGEs offer numerous advantages to the host, increasing its fitness by acquiring new functions that help bacteria contend with adverse conditions, including exposure to heavy metal and antibiotics. This study explores MGEs within microbial communities along the Yucatan coast using a metatranscriptomics approach. Prior to this research, nothing was known about the coastal Yucatan's microbial environmental mobilome and HGT processes between these bacterial communities. This study reveals a positive correlation between MGEs and antibiotic resistance genes (ARGs) along the Yucatan coast, with higher MGEs abundance in more contaminated sites. The Proteobacteria and Firmicutes groups exhibited the highest number of MGEs. It's important to highlight that the most abundant classes of MGEs might not be the ones most strongly linked to ARGs, as observed for the recombination/repair class. This work presents the first geographical distribution of the environmental mobilome in Yucatan Peninsula mangroves.
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Affiliation(s)
- Francisco Guillén-Chable
- UMDI-Sisal, Facultad de Ciencias, Universidad Nacional Autónoma de México, Sisal, Yucatán, México
| | - Johnny Omar Valdez Iuit
- UMDI-Sisal, Facultad de Ciencias, Universidad Nacional Autónoma de México, Sisal, Yucatán, México
| | | | - Carlos Rosas
- UMDI-Sisal, Facultad de Ciencias, Universidad Nacional Autónoma de México, Sisal, Yucatán, México
| | - Enrique Merino
- Departamento de Microbiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, México
| | - Zuemy Rodríguez-Escamilla
- Facultad de Sistemas Biológicos e Innovación Tecnológica, Universidad Autónoma "Benito Juárez" de Oaxaca, Oaxaca de Juárez, Oaxaca, México
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7
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Yoon PH, Skopintsev P, Shi H, Chen L, Adler BA, Al-Shimary M, Craig RJ, Loi KJ, DeTurk EC, Li Z, Amerasekera J, Trinidad M, Nisonoff H, Chen K, Lahiri A, Boger R, Jacobsen S, Banfield JF, Doudna JA. Eukaryotic RNA-guided endonucleases evolved from a unique clade of bacterial enzymes. Nucleic Acids Res 2023; 51:12414-12427. [PMID: 37971304 PMCID: PMC10711439 DOI: 10.1093/nar/gkad1053] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/19/2023] [Accepted: 10/24/2023] [Indexed: 11/19/2023] Open
Abstract
RNA-guided endonucleases form the crux of diverse biological processes and technologies, including adaptive immunity, transposition, and genome editing. Some of these enzymes are components of insertion sequences (IS) in the IS200/IS605 and IS607 transposon families. Both IS families encode a TnpA transposase and a TnpB nuclease, an RNA-guided enzyme ancestral to CRISPR-Cas12s. In eukaryotes, TnpB homologs occur as two distinct types, Fanzor1s and Fanzor2s. We analyzed the evolutionary relationships between prokaryotic TnpBs and eukaryotic Fanzors, which revealed that both Fanzor1s and Fanzor2s stem from a single lineage of IS607 TnpBs with unusual active site arrangement. The widespread nature of Fanzors implies that the properties of this particular lineage of IS607 TnpBs were particularly suited to adaptation in eukaryotes. Biochemical analysis of an IS607 TnpB and Fanzor1s revealed common strategies employed by TnpBs and Fanzors to co-evolve with their cognate transposases. Collectively, our results provide a new model of sequential evolution from IS607 TnpBs to Fanzor2s, and Fanzor2s to Fanzor1s that details how genes of prokaryotic origin evolve to give rise to new protein families in eukaryotes.
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Affiliation(s)
- Peter H Yoon
- Department of Molecular and Cell Biology, University of California, Berkeley; Berkeley, CA, USA
- Innovative Genomics Institute; University of California, Berkeley, CA, USA
| | - Petr Skopintsev
- Innovative Genomics Institute; University of California, Berkeley, CA, USA
- California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, CA, USA
| | - Honglue Shi
- Innovative Genomics Institute; University of California, Berkeley, CA, USA
- Howard Hughes Medical Institute, University of California, Berkeley; Berkeley, CA, USA
| | - LinXing Chen
- Innovative Genomics Institute; University of California, Berkeley, CA, USA
- Department of Earth and Planetary Science, University of California, Berkeley, CA, USA
| | - Benjamin A Adler
- Innovative Genomics Institute; University of California, Berkeley, CA, USA
- California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, CA, USA
| | - Muntathar Al-Shimary
- Department of Molecular and Cell Biology, University of California, Berkeley; Berkeley, CA, USA
- Innovative Genomics Institute; University of California, Berkeley, CA, USA
| | - Rory J Craig
- California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, CA, USA
| | - Kenneth J Loi
- Department of Molecular and Cell Biology, University of California, Berkeley; Berkeley, CA, USA
- Innovative Genomics Institute; University of California, Berkeley, CA, USA
| | - Evan C DeTurk
- Innovative Genomics Institute; University of California, Berkeley, CA, USA
- California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, CA, USA
| | - Zheng Li
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, CA, USA
| | - Jasmine Amerasekera
- Department of Human Genetics, University of California, Los Angeles, CA, USA
| | - Marena Trinidad
- Innovative Genomics Institute; University of California, Berkeley, CA, USA
- Howard Hughes Medical Institute, University of California, Berkeley; Berkeley, CA, USA
| | - Hunter Nisonoff
- Center for Computational Biology, University of California, Berkeley; Berkeley, CA, USA
| | - Kai Chen
- Department of Molecular and Cell Biology, University of California, Berkeley; Berkeley, CA, USA
- Innovative Genomics Institute; University of California, Berkeley, CA, USA
| | - Arushi Lahiri
- Department of Molecular and Cell Biology, University of California, Berkeley; Berkeley, CA, USA
- Innovative Genomics Institute; University of California, Berkeley, CA, USA
| | - Ron Boger
- Innovative Genomics Institute; University of California, Berkeley, CA, USA
- California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, CA, USA
| | - Steve Jacobsen
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, CA, USA
- Howard Hughes Medical Institute, University of California, Los Angeles CA, USA
| | - Jillian F Banfield
- Innovative Genomics Institute; University of California, Berkeley, CA, USA
- Department of Earth and Planetary Science, University of California, Berkeley, CA, USA
| | - Jennifer A Doudna
- Department of Molecular and Cell Biology, University of California, Berkeley; Berkeley, CA, USA
- Innovative Genomics Institute; University of California, Berkeley, CA, USA
- California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, CA, USA
- Howard Hughes Medical Institute, University of California, Berkeley; Berkeley, CA, USA
- Gladstone Institutes; San Francisco, CA, USA
- Gladstone-UCSF Institute of Genomic Immunology; San Francisco, CA, USA
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory; Berkeley, CA, USA
- Department of Chemistry, University of California, Berkeley; Berkeley, CA, USA
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8
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Žedaveinytė R, Meers C, Le HC, Mortman EE, Tang S, Lampe GD, Pesari SR, Gelsinger DR, Wiegand T, Sternberg SH. Antagonistic conflict between transposon-encoded introns and guide RNAs. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.20.567912. [PMID: 38045383 PMCID: PMC10690162 DOI: 10.1101/2023.11.20.567912] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
TnpB nucleases represent the evolutionary precursors to CRISPR-Cas12 and are widespread in all domains of life, presumably due to the critical roles they play in transposon proliferation. IS605family TnpB homologs function in bacteria as programmable homing endonucleases by exploiting transposon-encoded guide RNAs to cleave vacant genomic sites, thereby driving transposon maintenance through DSB-stimulated homologous recombination. Whether this pathway is conserved in other genetic contexts, and in association with other transposases, is unknown. Here we uncover molecular mechanisms of transposition and RNA-guided DNA cleavage by IS607-family elements that, remarkably, also encode catalytic, self-splicing group I introns. After reconstituting and systematically investigating each of these biochemical activities for a candidate 'IStron' derived from Clostridium botulinum, we discovered sequence and structural features of the transposon-encoded RNA that satisfy molecular requirements of a group I intron and TnpB guide RNA, while still retaining the ability to be faithfully mobilized at the DNA level by the TnpA transposase. Strikingly, intron splicing was strongly repressed not only by TnpB, but also by the secondary structure of ωRNA alone, allowing the element to carefully control the relative levels of spliced products versus functional guide RNAs. Our results suggest that IStron transcripts have evolved a sensitive equilibrium to balance competing and mutually exclusive activities that promote transposon maintenance while limiting adverse fitness costs on the host. Collectively, this work explains how diverse enzymatic activities emerged during the selfish spread of IS607-family elements and highlights molecular innovation in the multi-functional utility of transposon-encoded noncoding RNAs.
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Affiliation(s)
- Rimantė Žedaveinytė
- Department of Biochemistry and Molecular Biophysics, Columbia University; New York, NY 10032, USA
| | - Chance Meers
- Department of Biochemistry and Molecular Biophysics, Columbia University; New York, NY 10032, USA
| | - Hoang C. Le
- Department of Biochemistry and Molecular Biophysics, Columbia University; New York, NY 10032, USA
| | - Edan E. Mortman
- Department of Genetics and Development, Columbia University; New York, NY 10032, USA
| | - Stephen Tang
- Department of Biochemistry and Molecular Biophysics, Columbia University; New York, NY 10032, USA
| | - George D. Lampe
- Department of Biochemistry and Molecular Biophysics, Columbia University; New York, NY 10032, USA
| | - Sanjana R. Pesari
- Department of Biochemistry and Molecular Biophysics, Columbia University; New York, NY 10032, USA
- Present address: Biochemistry and Molecular Biophysics Program, University of California, San Diego, CA, USA
| | - Diego R. Gelsinger
- Department of Biochemistry and Molecular Biophysics, Columbia University; New York, NY 10032, USA
| | - Tanner Wiegand
- Department of Biochemistry and Molecular Biophysics, Columbia University; New York, NY 10032, USA
| | - Samuel H. Sternberg
- Department of Biochemistry and Molecular Biophysics, Columbia University; New York, NY 10032, USA
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9
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Meers C, Le H, Pesari SR, Hoffmann FT, Walker MW, Gezelle J, Sternberg SH. Transposon-encoded nucleases use guide RNAs to selfishly bias their inheritance. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.03.14.532601. [PMID: 36993599 PMCID: PMC10055086 DOI: 10.1101/2023.03.14.532601] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Insertion sequences (IS) are compact and pervasive transposable elements found in bacteria, which encode only the genes necessary for their mobilization and maintenance. IS 200 /IS 605 elements undergo 'peel-and-paste' transposition catalyzed by a TnpA transposase, but intriguingly, they also encode diverse, TnpB- and IscB-family proteins that are evolutionarily related to the CRISPR-associated effectors Cas12 and Cas9, respectively. Recent studies demonstrated that TnpB-family enzymes function as RNA-guided DNA endonucleases, but the broader biological role of this activity has remained enigmatic. Here we show that TnpB/IscB are essential to prevent permanent transposon loss as a consequence of the TnpA transposition mechanism. We selected a family of related IS elements from Geobacillus stearothermophilus that encode diverse TnpB/IscB orthologs, and showed that a single TnpA transposase was active for transposon excision. The donor joints formed upon religation of IS-flanking sequences were efficiently targeted for cleavage by RNA-guided TnpB/IscB nucleases, and co-expression of TnpB together with TnpA led to significantly greater transposon retention, relative to conditions in which TnpA was expressed alone. Remarkably, TnpA and TnpB/IscB recognize the same AT-rich transposon-adjacent motif (TAM) during transposon excision and RNA-guided DNA cleavage, respectively, revealing a striking convergence in the evolution of DNA sequence specificity between collaborating transposase and nuclease proteins. Collectively, our study reveals that RNA-guided DNA cleavage is a primal biochemical activity that arose to bias the selfish inheritance and spread of transposable elements, which was later co-opted during the evolution of CRISPR-Cas adaptive immunity for antiviral defense.
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Affiliation(s)
- Chance Meers
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY
| | - Hoang Le
- Department of Biology, University of Pennsylvania, Philadelphia, PA
| | - Sanjana R. Pesari
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY
| | - Florian T. Hoffmann
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY
| | - Matt W.G. Walker
- Department of Biological Sciences, Columbia University, New York, NY
| | - Jeanine Gezelle
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY
| | - Samuel H. Sternberg
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY
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10
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Wang Y, Guo M, Yang N, Guan Z, Wu H, Ullah N, Asare E, Shi S, Gao B, Song C. Phylogenetic Relationships among TnpB-Containing Mobile Elements in Six Bacterial Species. Genes (Basel) 2023; 14:523. [PMID: 36833450 PMCID: PMC9956272 DOI: 10.3390/genes14020523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 02/17/2023] [Accepted: 02/17/2023] [Indexed: 02/22/2023] Open
Abstract
Some families of mobile elements in bacterial genomes encode not only a transposase but also an accessory TnpB gene. This gene has been shown to encode an RNA-guided DNA endonuclease, co-evolving with Y1 transposase and serine recombinase in mobile elements IS605 and IS607. In this paper, we reveal the evolutionary relationships among TnpB-containing mobile elements (TCMEs) in well-assembled genomes of six bacterial species: Bacillus cereus, Clostridioides difficile, Deinococcus radiodurans, Escherichia coli, Helicobacter pylori and Salmonella enterica. In total, 9996 TCMEs were identified in 4594 genomes. They belonged to 39 different insertion sequences (ISs). Based on their genetic structures and sequence identities, the 39 TCMEs were classified into three main groups and six subgroups. According to our phylogenetic analysis, TnpBs include two main branches (TnpB-A and TnpB-B) and two minor branches (TnpB-C and TnpB-D). The key TnpB motifs and the associated Y1 and serine recombinases were highly conserved across species, even though their overall sequence identities were low. Substantial variation was observed for the rate of invasion across bacterial species and strains. Over 80% of the genomes of B. cereus, C. difficile, D. radiodurans and E. coli contained TCMEs; however, only 64% of the genomes of H. pylori and 44% of S. enterica genomes contained TCMEs. IS605 showed the largest rate of invasion in these species, while IS607 and IS1341 had a relatively narrow distribution. Co-invasions of IS605, IS607 and IS1341 elements were observed in various genomes. The largest average copy number was observed for IS605b elements in C. difficile. The average copy numbers of most other TCMEs were smaller than four. Our findings have important implications for understanding the co-evolution of TnpB-containing mobile elements and their biological roles in host genome evolution.
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Affiliation(s)
- Yali Wang
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Mengke Guo
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Naisu Yang
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Zhongxia Guan
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Han Wu
- Department of Immunology, School of Medicine, Shenzhen University, Shenzhen 518060, China
| | - Numan Ullah
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Emmanuel Asare
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Shasha Shi
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Bo Gao
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Chengyi Song
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
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11
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Revisiting the Tigger Transposon Evolution Revealing Extensive Involvement in the Shaping of Mammal Genomes. BIOLOGY 2022; 11:biology11060921. [PMID: 35741442 PMCID: PMC9219625 DOI: 10.3390/biology11060921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 06/08/2022] [Accepted: 06/14/2022] [Indexed: 11/17/2022]
Abstract
Simple Summary Despite the discovery of the Tigger family of pogo transposons in the mammalian genome, the evolution profile of this family is still incomplete. Here, we conducted a systematic evolution analysis for Tigger in nature. The data revealed that Tigger was found in a broad variety of animals, and extensive invasion of Tigger was observed in mammal genomes. Common horizontal transfer events of Tigger elements were observed across different lineages of animals, including mammals, that may have led to their widespread distribution, while parasites and invasive species may have promoted Tigger HT events. Our results also indicate that the activity of Tigger transposons tends to be low in vertebrates; only one mammalian genome and fish genome may harbor active Tigger. Abstract The data of this study revealed that Tigger was found in a wide variety of animal genomes, including 180 species from 36 orders of invertebrates and 145 species from 29 orders of vertebrates. An extensive invasion of Tigger was observed in mammals, with a high copy number. Almost 61% of those species contain more than 50 copies of Tigger; however, 46% harbor intact Tigger elements, although the number of these intact elements is very low. Common HT events of Tigger elements were discovered across different lineages of animals, including mammals, that may have led to their widespread distribution, whereas Helogale parvula and arthropods may have aided Tigger HT incidences. The activity of Tigger seems to be low in the kingdom of animals, most copies were truncated in the mammal genomes and lost their transposition activity, and Tigger transposons only display signs of recent and current activities in a few species of animals. The findings suggest that the Tigger family is important in structuring mammal genomes.
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12
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Prokaryotic and Eukaryotic Horizontal Transfer of Sailor (DD82E), a New Superfamily of IS630-Tc1-Mariner DNA Transposons. BIOLOGY 2021; 10:biology10101005. [PMID: 34681104 PMCID: PMC8533490 DOI: 10.3390/biology10101005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 09/26/2021] [Accepted: 09/28/2021] [Indexed: 12/22/2022]
Abstract
Simple Summary Transposable elements, including DNA transposons, play a significant role in genetic material exchanges between prokaryotes and eukaryotes. Comparative profiling of the evolution pattern of DNA transposons between prokaryotes and eukaryotes may identify potential genetic material exchanges between them and provide insights into the evolutionary history of prokaryotic and eukaryotic genomes. The members of the IS630-Tc1-mariner (ITm) group may represent the most diverse and widely distributed DNA transposons in nature, and the discovery of new members of this group is highly expected based on the increasing availability of genome sequencing data. We discovered a new superfamily (termed Sailor) belonging to the ITm hyperfamily, which differed from the known superfamilies of Tc1/mariner, DDxD/pogo and DD34E/Gambol, regarding phylogenetic position and catalytic domain. Our data revealed that Sailor was distributed in both prokaryotes and eukaryotes and suggested that horizontal transfer (HT) events of Sailor may occur from prokaryotic to eukaryotic genomes. Finally, internal transmissions of Sailor in prokaryotes and eukaryotes were also detected. Abstract Here, a new superfamily of IS630-Tc1-mariner (ITm) DNA transposons, termed Sailor, is identified, that is characterized by a DD82E catalytic domain and is distinct from all previously known superfamilies of the ITm group. Phylogenetic analyses revealed that Sailor forms a monophyletic clade with a more intimate link to the clades of Tc1/mariner and DD34E/Gambol. Sailor was detected in both prokaryotes and eukaryotes and invaded a total of 256 species across six kingdoms. Sailor is present in nine species of bacteria, two species of plantae, four species of protozoa, 23 species of Chromista, 12 species of Fungi and 206 species of animals. Moreover, Sailor is extensively distributed in invertebrates (a total of 206 species from six phyla) but is absent in vertebrates. Sailor transposons are 1.38–6.98 kb in total length and encoded transposases of ~676 aa flanked by TIRs with lengths between 18, 1362 and 4 bp (TATA) target-site duplications. Furthermore, our analysis provided strong evidence of Sailor transmissions from prokaryotes to eukaryotes and internal transmissions in both. These data update the classification of the ITm group and will contribute to the understanding of the evolution of ITm transposons and that of their hosts.
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13
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Gao RF, Wang JY, Liu KW, Yoshida K, Hsiao YY, Shi YX, Tsai KC, Chen YY, Mitsuda N, Liang CK, Wang ZW, Wang Y, Zhang DY, Huang L, Zhao X, Zhong WY, Cheng YH, Jiang ZD, Li MH, Sun WH, Yu X, Hu W, Zhou Z, Zhou XF, Yeh CM, Katoh K, Tsai WC, Liu ZJ, Martin F, Zhang GM. Comparative analysis of Phytophthora genomes reveals oomycete pathogenesis in crops. Heliyon 2021; 7:e06317. [PMID: 33665461 PMCID: PMC7907477 DOI: 10.1016/j.heliyon.2021.e06317] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 12/14/2020] [Accepted: 02/16/2021] [Indexed: 01/19/2023] Open
Abstract
The oomycete genus Phytophthora includes devastating plant pathogens that are found in almost all ecosystems. We sequenced the genomes of two quarantined Phytophthora species–P. fragariae and P. rubi. Comparing these Phytophthora species and related genera allowed reconstruction of the phylogenetic relationships within the genus Phytophthora and revealed Phytophthora genomic features associated with infection and pathogenicity. We found that several hundred Phytophthora genes are putatively inherited from red algae, but Phytophthora does not have vestigial plastids originating from phototrophs. The horizontally-transferred Phytophthora genes are abundant transposons that “transmit” exogenous gene to Phytophthora species thus bring about the gene recombination possibility. Several expansion events of Phytophthora gene families associated with cell wall biogenesis can be used as mutational targets to elucidate gene function in pathogenic interactions with host plants. This work enhanced the understanding of Phytophthora evolution and will also be helpful for the design of phytopathological control strategies.
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Affiliation(s)
- Rui-Fang Gao
- Animal & Plant Inspection and Quarantine Technology Center of Shenzhen Customs District P.R. China, Shenzhen 518045, China.,Shenzhen Key Laboratory for Research & Development on Detection Technology of Alien Pests, Shenzhen Academy of Inspection and Quarantine, Shenzhen 518045, China
| | - Jie-Yu Wang
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.,Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Ke-Wei Liu
- School of Life Sciences, Tsinghua University, Beijing 100084, China.,Center for Biotechnology and Biomedicine, Shenzhen Key Laboratory of Gene and Antibody Therapy State Key Laboratory of Health Sciences and Technology (prep), Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.,Center for Precision Medicine and Healthcare, Tsinghua-Berkeley Shenzhen Institute (TBSI), Shenzhen 518055, China
| | - Kouki Yoshida
- Technology Center, Taisei Corporation, Nase-cho 344-1, Totsuka-ku, Yokohama, Kanagawa 245-0051, Japan
| | - Yu-Yun Hsiao
- Orchid Research and Development Center, National Cheng Kung University, Tainan 701, Taiwan
| | - Yi-Xiang Shi
- Shanghai Major Bio-pharm Technology Co., Ltd., Shanghai 201203, China
| | | | - You-Yi Chen
- Department of Life Sciences, National Cheng Kung University, Tainan 701, Taiwan
| | - Nobutaka Mitsuda
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, Higashi 1-1-1, Tsukuba, Ibaraki 305-8562, Japan
| | - Chieh-Kai Liang
- Department of Life Sciences, National Cheng Kung University, Tainan 701, Taiwan
| | - Zhi-Wen Wang
- PubBio-Tech Services Corporation, Wuhan 430070, China
| | - Ying Wang
- Animal & Plant Inspection and Quarantine Technology Center of Shenzhen Customs District P.R. China, Shenzhen 518045, China.,Shenzhen Key Laboratory for Research & Development on Detection Technology of Alien Pests, Shenzhen Academy of Inspection and Quarantine, Shenzhen 518045, China
| | - Di-Yang Zhang
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Laiqiang Huang
- School of Life Sciences, Tsinghua University, Beijing 100084, China.,Center for Biotechnology and Biomedicine, Shenzhen Key Laboratory of Gene and Antibody Therapy State Key Laboratory of Health Sciences and Technology (prep), Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Xiang Zhao
- PubBio-Tech Services Corporation, Wuhan 430070, China
| | | | - Ying-Hui Cheng
- Fairylake Botanical Garden, Shenzhen & Chinese Academy of Sciences, Shenzhen 518004, China
| | - Zi-De Jiang
- College of Agriculture, South China Agricultural University, Guangzhou 510640, China
| | - Ming-He Li
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Wei-Hong Sun
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xia Yu
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Wenqi Hu
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Zhuang Zhou
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.,Zhejiang Institute of Subtropical Crops, Zhejiang Academy of Agricultural Sciences, Wenzhou 325005, China
| | - Xiao-Fan Zhou
- College of Agriculture, South China Agricultural University, Guangzhou 510640, China
| | - Chuan-Ming Yeh
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, Higashi 1-1-1, Tsukuba, Ibaraki 305-8562, Japan.,Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570, Japan.,Institute of Molecular Biology, National Chung Hsing University, Taichung 40227, Taiwan
| | - Kazutaka Katoh
- Research Institute for Microbial Diseases, Osaka University, 3-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Wen-Chieh Tsai
- Orchid Research and Development Center, National Cheng Kung University, Tainan 701, Taiwan.,Department of Life Sciences, National Cheng Kung University, Tainan 701, Taiwan.,Institute of Tropical Plant Sciences and Microbiology, National Cheng Kung University, Tainan 701, Taiwan
| | - Zhong-Jian Liu
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.,Center for Biotechnology and Biomedicine, Shenzhen Key Laboratory of Gene and Antibody Therapy State Key Laboratory of Health Sciences and Technology (prep), Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.,Zhejiang Institute of Subtropical Crops, Zhejiang Academy of Agricultural Sciences, Wenzhou 325005, China.,Institute of Vegetable and Flowers, Shandong Academy of Agricultural Sciences, 250100, Jinan, China
| | - Francis Martin
- Institut National de la Recherche Agronomique, UMR Interactions Arbres/Microorganismes, Centre INRA Grand Est-Nancy, Université de Lorraine, 54280 Champenoux, France
| | - Gui-Ming Zhang
- Animal & Plant Inspection and Quarantine Technology Center of Shenzhen Customs District P.R. China, Shenzhen 518045, China.,Shenzhen Key Laboratory for Research & Development on Detection Technology of Alien Pests, Shenzhen Academy of Inspection and Quarantine, Shenzhen 518045, China
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14
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Wang M, Ruan R. Genome-wide identification and functional analysis of the horizontally transferred genes in Penicillium. Genomics 2020; 112:5037-5043. [PMID: 32941984 DOI: 10.1016/j.ygeno.2020.09.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 09/03/2020] [Accepted: 09/09/2020] [Indexed: 10/23/2022]
Abstract
Horizontal gene transfer (HGT) is the transmission of genetic material between different evolutionary lineages and is believed to be an important source of genomic innovation in fungi. In this study, we searched for prokaryotic-derived HGTs in 23 fully sequenced genomes using a comprehensive phylogenomic pipeline followed by manual curation. We found strong support for 60 HGT events comprising 190 genes putatively acquired from bacteria. HGT affected all Penicillium species to various degrees. Gene duplication events happened to 3 HGT genes after the transmission. Most HGT events include genes encoding a variety of enzymes, which are associated with sugar, amino acid, and lipid metabolism. Transcriptome data from 6 Penicillium species revealed that 33 of 35 HGT genes showed expression under the conditions tested and 16 genes were differentially expressed. Our results suggest an important role for inter-domain gene transfers in shaping the genome of Penicillium fungi.
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Affiliation(s)
- Mingshuang Wang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
| | - Ruoxin Ruan
- Hangzhou Academy of Agricultural Sciences, Hangzhou, China.
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15
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Morero NR, Zuliani C, Kumar B, Bebel A, Okamoto S, Guynet C, Hickman AB, Chandler M, Dyda F, Barabas O. Targeting IS608 transposon integration to highly specific sequences by structure-based transposon engineering. Nucleic Acids Res 2019; 46:4152-4163. [PMID: 29635476 PMCID: PMC5934647 DOI: 10.1093/nar/gky235] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 04/05/2018] [Indexed: 12/15/2022] Open
Abstract
Transposable elements are efficient DNA carriers and thus important tools for transgenesis and insertional mutagenesis. However, their poor target sequence specificity constitutes an important limitation for site-directed applications. The insertion sequence IS608 from Helicobacter pylori recognizes a specific tetranucleotide sequence by base pairing, and its target choice can be re-programmed by changes in the transposon DNA. Here, we present the crystal structure of the IS608 target capture complex in an active conformation, providing a complete picture of the molecular interactions between transposon and target DNA prior to integration. Based on this, we engineered IS608 variants to direct their integration specifically to various 12/17-nt long target sites by extending the base pair interaction network between the transposon and the target DNA. We demonstrate in vitro that the engineered transposons efficiently select their intended target sites. Our data further elucidate how the distinct secondary structure of the single-stranded transposon intermediate prevents extended target specificity in the wild-type transposon, allowing it to move between diverse genomic sites. Our strategy enables efficient targeting of unique DNA sequences with high specificity in an easily programmable manner, opening possibilities for the use of the IS608 system for site-specific gene insertions.
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Affiliation(s)
- Natalia Rosalía Morero
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg 69117, Germany
| | - Cecilia Zuliani
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg 69117, Germany
| | - Banushree Kumar
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg 69117, Germany
| | - Aleksandra Bebel
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg 69117, Germany
| | - Sachi Okamoto
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg 69117, Germany
| | - Catherine Guynet
- Laboratoire de Microbiologie et Génétique Moléculaires, Centre National de la Recherche Scientifique, Toulouse Cedex 31062, France
| | - Alison Burgess Hickman
- Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Michael Chandler
- Laboratoire de Microbiologie et Génétique Moléculaires, Centre National de la Recherche Scientifique, Toulouse Cedex 31062, France
| | - Fred Dyda
- Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Orsolya Barabas
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg 69117, Germany
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16
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Gao S, Gold SE, Wisecaver JH, Zhang Y, Guo L, Ma LJ, Rokas A, Glenn AE. Genome-wide analysis of Fusarium verticillioides reveals inter-kingdom contribution of horizontal gene transfer to the expansion of metabolism. Fungal Genet Biol 2019; 128:60-73. [DOI: 10.1016/j.fgb.2019.04.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 03/02/2019] [Accepted: 04/01/2019] [Indexed: 11/30/2022]
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17
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Chen W, Mandali S, Hancock SP, Kumar P, Collazo M, Cascio D, Johnson RC. Multiple serine transposase dimers assemble the transposon-end synaptic complex during IS 607-family transposition. eLife 2018; 7:e39611. [PMID: 30289389 PMCID: PMC6188088 DOI: 10.7554/elife.39611] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 09/18/2018] [Indexed: 11/13/2022] Open
Abstract
IS607-family transposons are unusual because they do not have terminal inverted repeats or generate target site duplications. They encode two protein-coding genes, but only tnpA is required for transposition. Our X-ray structures confirm that TnpA is a member of the serine recombinase (SR) family, but the chemically-inactive quaternary structure of the dimer, along with the N-terminal location of the DNA binding domain, are different from other SRs. TnpA dimers from IS1535 cooperatively associate with multiple subterminal repeats, which together with additional nonspecific binding, form a nucleoprotein filament on one transposon end that efficiently captures a second unbound end to generate the paired-end complex (PEC). Formation of the PEC does not require a change in the dimeric structure of the catalytic domain, but remodeling of the C-terminal α-helical region is involved. We posit that the PEC recruits a chemically-active conformer of TnpA to the transposon end to initiate DNA chemistry.
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Affiliation(s)
- Wenyang Chen
- Department of Biological ChemistryDavid Geffen School of Medicine, University of California at Los AngelesLos AngelesUnited States
| | - Sridhar Mandali
- Department of Biological ChemistryDavid Geffen School of Medicine, University of California at Los AngelesLos AngelesUnited States
| | - Stephen P Hancock
- Department of Biological ChemistryDavid Geffen School of Medicine, University of California at Los AngelesLos AngelesUnited States
| | - Pramod Kumar
- Department of Biological ChemistryDavid Geffen School of Medicine, University of California at Los AngelesLos AngelesUnited States
| | - Michael Collazo
- Department of Energy Institute of Genomics and ProteomicsUniversity of California at Los AngelesLos AngelesUnited States
| | - Duilio Cascio
- Department of Energy Institute of Genomics and ProteomicsUniversity of California at Los AngelesLos AngelesUnited States
| | - Reid C Johnson
- Department of Biological ChemistryDavid Geffen School of Medicine, University of California at Los AngelesLos AngelesUnited States
- Molecular Biology InstituteUniversity of California at Los AngelesLos AngelesUnited States
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18
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Shukla A, Chatterjee A, Kondabagil K. The number of genes encoding repeat domain-containing proteins positively correlates with genome size in amoebal giant viruses. Virus Evol 2018; 4:vex039. [PMID: 29308275 PMCID: PMC5753266 DOI: 10.1093/ve/vex039] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Curiously, in viruses, the virion volume appears to be predominantly driven by genome length rather than the number of proteins it encodes or geometric constraints. With their large genome and giant particle size, amoebal viruses (AVs) are ideally suited to study the relationship between genome and virion size and explore the role of genome plasticity in their evolutionary success. Different genomic regions of AVs exhibit distinct genealogies. Although the vertically transferred core genes and their functions are universally conserved across the nucleocytoplasmic large DNA virus (NCLDV) families and are essential for their replication, the horizontally acquired genes are variable across families and are lineage-specific. When compared with other giant virus families, we observed a near–linear increase in the number of genes encoding repeat domain-containing proteins (RDCPs) with the increase in the genome size of AVs. From what is known about the functions of RDCPs in bacteria and eukaryotes and their prevalence in the AV genomes, we envisage important roles for RDCPs in the life cycle of AVs, their genome expansion, and plasticity. This observation also supports the evolution of AVs from a smaller viral ancestor by the acquisition of diverse gene families from the environment including RDCPs that might have helped in host adaption.
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Affiliation(s)
- Avi Shukla
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400076, India
| | - Anirvan Chatterjee
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400076, India
| | - Kiran Kondabagil
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400076, India
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19
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Peccoud J, Cordaux R, Gilbert C. Analyzing Horizontal Transfer of Transposable Elements on a Large Scale: Challenges and Prospects. Bioessays 2017; 40. [DOI: 10.1002/bies.201700177] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 11/22/2017] [Indexed: 02/06/2023]
Affiliation(s)
- Jean Peccoud
- UMR CNRS 7267; Ecologie et Biologie des Interactions; Equipe Ecologie Evolution Symbiose; Université de Poitiers; 86000 Poitiers France
| | - Richard Cordaux
- UMR CNRS 7267; Ecologie et Biologie des Interactions; Equipe Ecologie Evolution Symbiose; Université de Poitiers; 86000 Poitiers France
| | - Clément Gilbert
- UMR CNRS 9191; UMR 247 IRD Laboratoire Evolution, Génomes, Comportement, Écologie; Université Paris-Sud,; 91198 Gif-sur-Yvette France
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20
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Shapiro JA. Living Organisms Author Their Read-Write Genomes in Evolution. BIOLOGY 2017; 6:E42. [PMID: 29211049 PMCID: PMC5745447 DOI: 10.3390/biology6040042] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 11/17/2017] [Accepted: 11/28/2017] [Indexed: 12/18/2022]
Abstract
Evolutionary variations generating phenotypic adaptations and novel taxa resulted from complex cellular activities altering genome content and expression: (i) Symbiogenetic cell mergers producing the mitochondrion-bearing ancestor of eukaryotes and chloroplast-bearing ancestors of photosynthetic eukaryotes; (ii) interspecific hybridizations and genome doublings generating new species and adaptive radiations of higher plants and animals; and, (iii) interspecific horizontal DNA transfer encoding virtually all of the cellular functions between organisms and their viruses in all domains of life. Consequently, assuming that evolutionary processes occur in isolated genomes of individual species has become an unrealistic abstraction. Adaptive variations also involved natural genetic engineering of mobile DNA elements to rewire regulatory networks. In the most highly evolved organisms, biological complexity scales with "non-coding" DNA content more closely than with protein-coding capacity. Coincidentally, we have learned how so-called "non-coding" RNAs that are rich in repetitive mobile DNA sequences are key regulators of complex phenotypes. Both biotic and abiotic ecological challenges serve as triggers for episodes of elevated genome change. The intersections of cell activities, biosphere interactions, horizontal DNA transfers, and non-random Read-Write genome modifications by natural genetic engineering provide a rich molecular and biological foundation for understanding how ecological disruptions can stimulate productive, often abrupt, evolutionary transformations.
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Affiliation(s)
- James A Shapiro
- Department of Biochemistry and Molecular Biology, University of Chicago GCIS W123B, 979 E. 57th Street, Chicago, IL 60637, USA.
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21
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Arkhipova IR. Using bioinformatic and phylogenetic approaches to classify transposable elements and understand their complex evolutionary histories. Mob DNA 2017; 8:19. [PMID: 29225705 PMCID: PMC5718144 DOI: 10.1186/s13100-017-0103-2] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 11/28/2017] [Indexed: 12/11/2022] Open
Abstract
In recent years, much attention has been paid to comparative genomic studies of transposable elements (TEs) and the ensuing problems of their identification, classification, and annotation. Different approaches and diverse automated pipelines are being used to catalogue and categorize mobile genetic elements in the ever-increasing number of prokaryotic and eukaryotic genomes, with little or no connectivity between different domains of life. Here, an overview of the current picture of TE classification and evolutionary relationships is presented, updating the diversity of TE types uncovered in sequenced genomes. A tripartite TE classification scheme is proposed to account for their replicative, integrative, and structural components, and the need to expand in vitro and in vivo studies of their structural and biological properties is emphasized. Bioinformatic studies have now become front and center of novel TE discovery, and experimental pursuits of these discoveries hold great promise for both basic and applied science.
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Affiliation(s)
- Irina R Arkhipova
- Josephine Bay Paul Center for Comparative Molecular Biology and Evolution, Marine Biological Laboratory, Woods Hole, MA 02543 USA
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22
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Huang W, Tsai L, Li Y, Hua N, Sun C, Wei C. Widespread of horizontal gene transfer in the human genome. BMC Genomics 2017; 18:274. [PMID: 28376762 PMCID: PMC5379729 DOI: 10.1186/s12864-017-3649-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 03/21/2017] [Indexed: 01/07/2023] Open
Abstract
Background A fundamental concept in biology is that heritable material is passed from parents to offspring, a process called vertical gene transfer. An alternative mechanism of gene acquisition is through horizontal gene transfer (HGT), which involves movement of genetic materials between different species. Horizontal gene transfer has been found prevalent in prokaryotes but very rare in eukaryote. In this paper, we investigate horizontal gene transfer in the human genome. Results From the pair-wise alignments between human genome and 53 vertebrate genomes, 1,467 human genome regions (2.6 M bases) from all chromosomes were found to be more conserved with non-mammals than with most mammals. These human genome regions involve 642 known genes, which are enriched with ion binding. Compared to known horizontal gene transfer regions in the human genome, there were few overlapping regions, which indicated horizontal gene transfer is more common than we expected in the human genome. Conclusions Horizontal gene transfer impacts hundreds of human genes and this study provided insight into potential mechanisms of HGT in the human genome.
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Affiliation(s)
- Wenze Huang
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Lillian Tsai
- Harvard College, Harvard University, Cambridge, 02138, MA, USA
| | - Yulong Li
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Nan Hua
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.,Shanghai Center for Bioinformation Technology, 1278 Keyuan Road, Pudong District, Shanghai, 201203, China
| | - Chen Sun
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.,Shanghai Center for Bioinformation Technology, 1278 Keyuan Road, Pudong District, Shanghai, 201203, China
| | - Chaochun Wei
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China. .,Shanghai Center for Bioinformation Technology, 1278 Keyuan Road, Pudong District, Shanghai, 201203, China.
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23
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Abstract
This chapter presents an analysis of the organization and distribution of the IS200/IS605 family of insertion sequences (IS). Members of this family are widespread in both bacteria and archaea. They are unusual because they use obligatory single-strand DNA intermediates, which distinguishes them from classical IS. We summarize studies of the experimental model systems IS608 (from Helicobacter pylori) and ISDra2 (from Deinococcus radiodurans) and present biochemical, genetic, and structural data that describe their transposition pathway and the way in which their transposase (an HuH rather than a DDE enzyme) catalyzes this process. The transposition of IS200/IS605 family members can be described as a "Peel-and-Paste" mechanism. We also address the probable domestication of IS200/IS605 family transposases as enzymes involved in multiplication of repeated extragenic palindromes and as potential homing endonucleases in intron-IS chimeras.
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24
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Durzyńska J, Goździcka-Józefiak A. Viruses and cells intertwined since the dawn of evolution. Virol J 2015; 12:169. [PMID: 26475454 PMCID: PMC4609113 DOI: 10.1186/s12985-015-0400-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 10/07/2015] [Indexed: 12/24/2022] Open
Abstract
Many attempts have been made to define nature of viruses and to uncover their origin. Our aim within this work was to show that there are different perceptions of viruses and many concepts to explain their emergence: the virus-first concept (also called co-evolution), the escape and the reduction theories. Moreover, a relatively new concept of polyphyletic virus origin called “three RNA cells, three DNA viruses” proposed by Forterre is described herein. In this paper, not only is each thesis supported by a body of evidence but also counter-argued in the light of various findings to give more insightful considerations to the readers. As the origin of viruses and that of living cells are most probably interdependent, we decided to reveal ideas concerning nature of cellular last universal common ancestor (LUCA). Furthermore, we discuss monophyletic ancestry of cellular domains and their relationships at the molecular level of membrane lipids and replication strategies of these three types of cells. In this review, we also present the emergence of DNA viruses requiring an evolutionary transition from RNA to DNA and recently discovered giant DNA viruses possibly involved in eukaryogenesis. In the course of evolution viruses emerged many times. They have always played a key role through horizontal gene transfer in evolutionary events and in formation of the tree of life or netlike routes of evolution providing a great deal of genetic diversity. In our opinion, future findings are crucial to better understand past relations between viruses and cells and the origin of both.
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Affiliation(s)
- Julia Durzyńska
- Department of Molecular Virology, Institute of Experimental Biology, Faculty of Biology, A. Mickiewicz University, ul. Umultowska 89, 61-614, Poznań, Poland.
| | - Anna Goździcka-Józefiak
- Department of Molecular Virology, Institute of Experimental Biology, Faculty of Biology, A. Mickiewicz University, ul. Umultowska 89, 61-614, Poznań, Poland
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25
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Hinchliff CE, Smith SA, Allman JF, Burleigh JG, Chaudhary R, Coghill LM, Crandall KA, Deng J, Drew BT, Gazis R, Gude K, Hibbett DS, Katz LA, Laughinghouse HD, McTavish EJ, Midford PE, Owen CL, Ree RH, Rees JA, Soltis DE, Williams T, Cranston KA. Synthesis of phylogeny and taxonomy into a comprehensive tree of life. Proc Natl Acad Sci U S A 2015; 112:12764-9. [PMID: 26385966 PMCID: PMC4611642 DOI: 10.1073/pnas.1423041112] [Citation(s) in RCA: 372] [Impact Index Per Article: 41.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Reconstructing the phylogenetic relationships that unite all lineages (the tree of life) is a grand challenge. The paucity of homologous character data across disparately related lineages currently renders direct phylogenetic inference untenable. To reconstruct a comprehensive tree of life, we therefore synthesized published phylogenies, together with taxonomic classifications for taxa never incorporated into a phylogeny. We present a draft tree containing 2.3 million tips-the Open Tree of Life. Realization of this tree required the assembly of two additional community resources: (i) a comprehensive global reference taxonomy and (ii) a database of published phylogenetic trees mapped to this taxonomy. Our open source framework facilitates community comment and contribution, enabling the tree to be continuously updated when new phylogenetic and taxonomic data become digitally available. Although data coverage and phylogenetic conflict across the Open Tree of Life illuminate gaps in both the underlying data available for phylogenetic reconstruction and the publication of trees as digital objects, the tree provides a compelling starting point for community contribution. This comprehensive tree will fuel fundamental research on the nature of biological diversity, ultimately providing up-to-date phylogenies for downstream applications in comparative biology, ecology, conservation biology, climate change, agriculture, and genomics.
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Affiliation(s)
- Cody E Hinchliff
- Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109
| | - Stephen A Smith
- Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109;
| | | | | | - Ruchi Chaudhary
- Department of Biology, University of Florida, Gainesville, FL 32611
| | | | - Keith A Crandall
- Computational Biology Institute, George Washington University, Ashburn, VA 20147
| | - Jiabin Deng
- Department of Biology, University of Florida, Gainesville, FL 32611
| | - Bryan T Drew
- Department of Biology, University of Nebraska-Kearney, Kearney, NE 68849
| | - Romina Gazis
- Department of Biology, Clark University, Worcester, MA 01610
| | - Karl Gude
- School of Journalism, Michigan State University, East Lansing, MI 48824
| | - David S Hibbett
- Department of Biology, Clark University, Worcester, MA 01610
| | - Laura A Katz
- Biological Science, Clark Science Center, Smith College, Northampton, MA 01063
| | | | - Emily Jane McTavish
- Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS 66045
| | | | | | | | - Jonathan A Rees
- National Evolutionary Synthesis Center, Duke University, Durham, NC 27705
| | - Douglas E Soltis
- Department of Biology, University of Florida, Gainesville, FL 32611; Florida Museum of Natural History, University of Florida, Gainesville, FL 32611
| | - Tiffani Williams
- Computer Science and Engineering, Texas A&M University, College Station, TX 77843
| | - Karen A Cranston
- National Evolutionary Synthesis Center, Duke University, Durham, NC 27705;
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26
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Transposase interaction with the β sliding clamp: effects on insertion sequence proliferation and transposition rate. Sci Rep 2015; 5:13329. [PMID: 26306550 PMCID: PMC4549789 DOI: 10.1038/srep13329] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 07/23/2015] [Indexed: 01/05/2023] Open
Abstract
Insertion sequences (ISs) are ubiquitous and abundant mobile genetic elements in prokaryotic genomes. ISs often encode only one protein, the transposase, which catalyzes their transposition. Recent studies have shown that transposases of many different IS families interact with the β sliding clamp, a DNA replication factor of the host. However, it was unclear to what extent this interaction limits or favors the ability of ISs to colonize a chromosome from a phylogenetically-distant organism, or if the strength of this interaction affects the transposition rate. Here we describe the proliferation of a member of the IS1634 family in Acidiphilium over ~600 generations of cultured growth. We demonstrate that the purified transposase binds to the β sliding clamp of Acidiphilium, Leptospirillum and E. coli. Further, we also demonstrate that the Acidiphilium IS1634 transposase binds to the archaeal sliding clamp (PCNA) from Methanosarcina, and that the transposase encoded by Methanosarcina IS1634 binds to Acidiphilium β. Finally, we demonstrate that increasing the strength of the interaction between β and transposase results in a higher transposition rate in vivo. Our results suggest that the interaction could determine the potential of ISs to be mobilized in bacterial populations and also their ability to proliferate within chromosomes.
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27
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Sun C, Feschotte C, Wu Z, Mueller RL. DNA transposons have colonized the genome of the giant virus Pandoravirus salinus. BMC Biol 2015; 13:38. [PMID: 26067596 PMCID: PMC4495683 DOI: 10.1186/s12915-015-0145-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 06/03/2015] [Indexed: 01/06/2023] Open
Abstract
Background Transposable elements are mobile DNA sequences that are widely distributed in prokaryotic and eukaryotic genomes, where they represent a major force in genome evolution. However, transposable elements have rarely been documented in viruses, and their contribution to viral genome evolution remains largely unexplored. Pandoraviruses are recently described DNA viruses with genome sizes that exceed those of some prokaryotes, rivaling parasitic eukaryotes. These large genomes appear to include substantial noncoding intergenic spaces, which provide potential locations for transposable element insertions. However, no mobile genetic elements have yet been reported in pandoravirus genomes. Results Here, we report a family of miniature inverted-repeat transposable elements (MITEs) in the Pandoravirus salinus genome, representing the first description of a virus populated with a canonical transposable element family that proliferated by transposition within the viral genome. The MITE family, which we name Submariner, includes 30 copies with all the hallmarks of MITEs: short length, terminal inverted repeats, TA target site duplication, and no coding capacity. Submariner elements show signs of transposition and are undetectable in the genome of Pandoravirus dulcis, the closest known relative Pandoravirus salinus. We identified a DNA transposon related to Submariner in the genome of Acanthamoeba castellanii, a species thought to host pandoraviruses, which contains remnants of coding sequence for a Tc1/mariner transposase. These observations suggest that the Submariner MITEs of P. salinus belong to the widespread Tc1/mariner superfamily and may have been mobilized by an amoebozoan host. Ten of the 30 MITEs in the P. salinus genome are located within coding regions of predicted genes, while others are close to genes, suggesting that these transposons may have contributed to viral genetic novelty. Conclusions Our discovery highlights the remarkable ability of DNA transposons to colonize and shape genomes from all domains of life, as well as giant viruses. Our findings continue to blur the division between viral and cellular genomes, adhering to the emerging view that the content, dynamics, and evolution of the genomes of giant viruses do not substantially differ from those of cellular organisms. Electronic supplementary material The online version of this article (doi:10.1186/s12915-015-0145-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Cheng Sun
- Department of Biology, Colorado State University, Campus Delivery 1878, Fort Collins, CO, 80523-1878, USA.
| | - Cédric Feschotte
- Department of Human Genetics, The University of Utah, Salt Lake City, UT, 84112, USA.
| | - Zhiqiang Wu
- Department of Biology, Colorado State University, Campus Delivery 1878, Fort Collins, CO, 80523-1878, USA.
| | - Rachel Lockridge Mueller
- Department of Biology, Colorado State University, Campus Delivery 1878, Fort Collins, CO, 80523-1878, USA.
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28
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Abstract
ABSTRACT
The number and diversity of known prokaryotic insertion sequences (IS) have increased enormously since their discovery in the late 1960s. At present the sequences of more than 4000 different IS have been deposited in the specialized ISfinder database. Over time it has become increasingly apparent that they are important actors in the evolution of their host genomes and are involved in sequestering, transmitting, mutating and activating genes, and in the rearrangement of both plasmids and chromosomes. This review presents an overview of our current understanding of these transposable elements (TE), their organization and their transposition mechanism as well as their distribution and genomic impact. In spite of their diversity, they share only a very limited number of transposition mechanisms which we outline here. Prokaryotic IS are but one example of a variety of diverse TE which are being revealed due to the advent of extensive genome sequencing projects. A major conclusion from sequence comparisons of various TE is that frontiers between the different types are becoming less clear. We detail these receding frontiers between different IS-related TE. Several, more specialized chapters in this volume include additional detailed information concerning a number of these.
In a second section of the review, we provide a detailed description of the expanding variety of IS, which we have divided into families for convenience. Our perception of these families continues to evolve and families emerge regularly as more IS are identified. This section is designed as an aid and a source of information for consultation by interested specialist readers.
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29
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Modolo L, Picard F, Lerat E. A new genome-wide method to track horizontally transferred sequences: application to Drosophila. Genome Biol Evol 2015; 6:416-32. [PMID: 24497602 PMCID: PMC3942030 DOI: 10.1093/gbe/evu026] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Because of methodological breakthroughs and the availability of an increasing amount of whole-genome sequence data, horizontal transfers (HTs) in eukaryotes have received much attention recently. Contrary to similar analyses in prokaryotes, most studies in eukaryotes usually investigate particular sequences corresponding to transposable elements (TEs), neglecting the other components of the genome. We present a new methodological framework for the genome-wide detection of all putative horizontally transferred sequences between two species that requires no prior knowledge of the transferred sequences. This method provides a broader picture of HTs in eukaryotes by fully exploiting complete-genome sequence data. In contrast to previous genome-wide approaches, we used a well-defined statistical framework to control for the number of false positives in the results, and we propose two new validation procedures to control for confounding factors. The first validation procedure relies on a comparative analysis with other species of the phylogeny to validate HTs for the nonrepeated sequences detected, whereas the second one built upon the study of the dynamics of the detected TEs. We applied our method to two closely related Drosophila species, Drosophila melanogaster and D. simulans, in which we discovered 10 new HTs in addition to all the HTs previously detected in different studies, which underscores our method’s high sensitivity and specificity. Our results favor the hypothesis of multiple independent HTs of TEs while unraveling a small portion of the network of HTs in the Drosophila phylogeny.
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Affiliation(s)
- Laurent Modolo
- Université de Lyon, France, Université Lyon 1, CNRS, UMR 5558, Laboratoire de Biométrie et Biologie Evolutive, VIlleurbanne, France
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30
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Filée J. Multiple occurrences of giant virus core genes acquired by eukaryotic genomes: the visible part of the iceberg? Virology 2014; 466-467:53-9. [PMID: 24998348 DOI: 10.1016/j.virol.2014.06.004] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Revised: 06/03/2014] [Accepted: 06/04/2014] [Indexed: 12/18/2022]
Abstract
Giant Viruses are a widespread group of viruses, characterized by huge genomes composed of a small subset of ancestral, vertically inherited core genes along with a large body of highly variable genes. In this study, I report the acquisition of 23 core ancestral Giant Virus genes by diverse eukaryotic species including various protists, a moss and a cnidarian. The viral genes are inserted in large scaffolds or chromosomes with intron-rich, eukaryotic-like genomic contexts, refuting the possibility of DNA contaminations. Some of these genes are expressed and in the cryptophyte alga Guillardia theta, a possible non-homologous displacement of the eukaryotic DNA primase by a viral D5 helicase/primase is documented. As core Giant Virus genes represent only a tiny fraction of the total genomic repertoire of these viruses, these results suggest that Giant Viruses represent an underestimated source of new genes and functions for their hosts.
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Affiliation(s)
- Jonathan Filée
- Laboratoire Evolution, Genomes, Spéciation (LEGS), CNRS UPR9034, Université Paris-Sud. Avenue de la Terrasse, 91190 Gif Sur Yvette, France.
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31
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Siguier P, Gourbeyre E, Chandler M. Bacterial insertion sequences: their genomic impact and diversity. FEMS Microbiol Rev 2014; 38:865-91. [PMID: 24499397 PMCID: PMC7190074 DOI: 10.1111/1574-6976.12067] [Citation(s) in RCA: 387] [Impact Index Per Article: 38.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 01/19/2014] [Accepted: 01/22/2014] [Indexed: 01/06/2023] Open
Abstract
Insertion sequences (ISs), arguably the smallest and most numerous autonomous transposable elements (TEs), are important players in shaping their host genomes. This review focuses on prokaryotic ISs. We discuss IS distribution and impact on genome evolution. We also examine their effects on gene expression, especially their role in activating neighbouring genes, a phenomenon of particular importance in the recent upsurge of bacterial antibiotic resistance. We explain how ISs are identified and classified into families by a combination of characteristics including their transposases (Tpases), their overall genetic organisation and the accessory genes which some ISs carry. We then describe the organisation of autonomous and nonautonomous IS‐related elements. This is used to illustrate the growing recognition that the boundaries between different types of mobile element are becoming increasingly difficult to define as more are being identified. We review the known Tpase types, their different catalytic activities used in cleaving and rejoining DNA strands during transposition, their organisation into functional domains and the role of this in regulation. Finally, we consider examples of prokaryotic IS domestication. In a more speculative section, we discuss the necessity of constructing more quantitative dynamic models to fully appreciate the continuing impact of TEs on prokaryotic populations.
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Affiliation(s)
- Patricia Siguier
- Laboratoire de Microbiologie et Génétique Moléculaires, Unité Mixte de Recherche 5100, Centre National de Recherche Scientifique, Toulouse Cedex, France
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32
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Schönknecht G, Weber APM, Lercher MJ. Horizontal gene acquisitions by eukaryotes as drivers of adaptive evolution. Bioessays 2013; 36:9-20. [DOI: 10.1002/bies.201300095] [Citation(s) in RCA: 112] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | - Andreas P. M. Weber
- Institute of Plant Biochemistry; Heinrich-Heine-Universität Düsseldorf; Düsseldorf Germany
- Cluster of Excellence on Plant Sciences (CEPLAS); Heinrich-Heine-Universität Düsseldorf; Düsseldorf Germany
| | - Martin J. Lercher
- Cluster of Excellence on Plant Sciences (CEPLAS); Heinrich-Heine-Universität Düsseldorf; Düsseldorf Germany
- Institute for Computer Science; Heinrich-Heine-Universität Düsseldorf; Düsseldorf Germany
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33
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Boocock MR, Rice PA. A proposed mechanism for IS607-family serine transposases. Mob DNA 2013; 4:24. [PMID: 24195768 PMCID: PMC4058570 DOI: 10.1186/1759-8753-4-24] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2013] [Accepted: 10/07/2013] [Indexed: 01/26/2023] Open
Abstract
Background The transposases encoded by the IS607 family of mobile elements are unusual serine recombinases with an inverted domain order and minimal specificity for target DNA. Results Structural genomics groups have determined three crystal structures of the catalytic domains of IS607 family transposases. The dimers formed by these catalytic domains are very different from those seen for other serine recombinases and include interactions that usually only occur upon formation of a synaptic tetramer. Conclusions Based on these structures, we propose a model for how IS607-family transposases could form a synaptic tetramer. The model suggests that, unlike other serine recombinases, these enzymes carry out sequence-specific DNA binding and catalysis in trans: the DNA binding and catalytic domains of each subunit are proposed to interact with different DNA duplexes. The model also suggests an explanation for the minimal target DNA specificity.
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Affiliation(s)
| | - Phoebe A Rice
- Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, IL 60637, USA.
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34
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Filée J. Route of NCLDV evolution: the genomic accordion. Curr Opin Virol 2013; 3:595-9. [PMID: 23896278 DOI: 10.1016/j.coviro.2013.07.003] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 06/27/2013] [Accepted: 07/05/2013] [Indexed: 11/15/2022]
Abstract
Nucleo cytoplasmic large DNA virus (NCLDV) superfamily forms a diverse group of viruses that infects a wide range of eukaryotic hosts (e.g. vertebrates, insects, protests, etc.). These viruses are characterized by a huge range in genome size (between 100kb and 1.2Mb), coupled with an extraordinary diverse genomic repertoire. Here I will review some recent results that shed light on the origin and genome evolution of these viruses, introducing the idea that these viruses evolved using a complex process of genomic accordion that imply successive steps of genome expansions (duplication and gene transfers) and genome reduction, in addition to movement and amplification of diverse mobile genetic elements.
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Affiliation(s)
- Jonathan Filée
- Laboratoire Evolution, Génomes et Spéciation, CNRS UPR 9034, Université Paris-Sud, Avenue de la Terrasse 91198 Gif sur Yvette cedex, France.
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