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Chen X, Yin X, Shi X, Yan W, Yang Y, Liu L, Zhang T. Melon: metagenomic long-read-based taxonomic identification and quantification using marker genes. Genome Biol 2024; 25:226. [PMID: 39160564 PMCID: PMC11331721 DOI: 10.1186/s13059-024-03363-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 07/30/2024] [Indexed: 08/21/2024] Open
Abstract
Long-read sequencing holds great potential for characterizing complex microbial communities, yet taxonomic profiling tools designed specifically for long reads remain lacking. We introduce Melon, a novel marker-based taxonomic profiler that capitalizes on the unique attributes of long reads. Melon employs a two-stage classification scheme to reduce computational time and is equipped with an expectation-maximization-based post-correction module to handle ambiguous reads. Melon achieves superior performance compared to existing tools in both mock and simulated samples. Using wastewater metagenomic samples, we demonstrate the applicability of Melon by showing it provides reliable estimates of overall genome copies, and species-level taxonomic profiles.
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Affiliation(s)
- Xi Chen
- Environmental Microbiome Engineering and Biotechnology Lab, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Xiaole Yin
- Environmental Microbiome Engineering and Biotechnology Lab, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Xianghui Shi
- Environmental Microbiome Engineering and Biotechnology Lab, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Weifu Yan
- Environmental Microbiome Engineering and Biotechnology Lab, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Yu Yang
- Environmental Microbiome Engineering and Biotechnology Lab, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Lei Liu
- Environmental Microbiome Engineering and Biotechnology Lab, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Tong Zhang
- Environmental Microbiome Engineering and Biotechnology Lab, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
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2
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Van Uffelen A, Posadas A, Roosens NHC, Marchal K, De Keersmaecker SCJ, Vanneste K. Benchmarking bacterial taxonomic classification using nanopore metagenomics data of several mock communities. Sci Data 2024; 11:864. [PMID: 39127718 PMCID: PMC11316826 DOI: 10.1038/s41597-024-03672-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Accepted: 07/22/2024] [Indexed: 08/12/2024] Open
Abstract
Taxonomic classification is crucial in identifying organisms within diverse microbial communities when using metagenomics shotgun sequencing. While second-generation Illumina sequencing still dominates, third-generation nanopore sequencing promises improved classification through longer reads. However, extensive benchmarking studies on nanopore data are lacking. We systematically evaluated performance of bacterial taxonomic classification for metagenomics nanopore sequencing data for several commonly used classifiers, using standardized reference sequence databases, on the largest collection of publicly available data for defined mock communities thus far (nine samples), representing different research domains and application scopes. Our results categorize classifiers into three categories: low precision/high recall; medium precision/medium recall, and high precision/medium recall. Most fall into the first group, although precision can be improved without excessively penalizing recall with suitable abundance filtering. No definitive 'best' classifier emerges, and classifier selection depends on application scope and practical requirements. Although few classifiers designed for long reads exist, they generally exhibit better performance. Our comprehensive benchmarking provides concrete recommendations, supported by publicly available code for reassessment and fine-tuning by other scientists.
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Affiliation(s)
- Alexander Van Uffelen
- Transversal activities in Applied Genomics, Sciensano, Brussels, Belgium
- Department of Information Technology, Internet Technology and Data Science Lab (IDLab), Interuniversity Microelectronics Centre (IMEC), Ghent University, Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
| | - Andrés Posadas
- Transversal activities in Applied Genomics, Sciensano, Brussels, Belgium
- Department of Information Technology, Internet Technology and Data Science Lab (IDLab), Interuniversity Microelectronics Centre (IMEC), Ghent University, Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
| | - Nancy H C Roosens
- Transversal activities in Applied Genomics, Sciensano, Brussels, Belgium
| | - Kathleen Marchal
- Department of Information Technology, Internet Technology and Data Science Lab (IDLab), Interuniversity Microelectronics Centre (IMEC), Ghent University, Ghent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Department of Genetics, University of Pretoria, Pretoria, South Africa
| | | | - Kevin Vanneste
- Transversal activities in Applied Genomics, Sciensano, Brussels, Belgium.
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3
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Kong L, Wang Y, Cui D, He W, Zhang C, Zheng C. Application of single-cell Raman-deuterium isotope probing to reveal the resistance of marine ammonia-oxidizing archaea SCM1 against common antibiotics. CHEMOSPHERE 2024; 362:142500. [PMID: 38852635 DOI: 10.1016/j.chemosphere.2024.142500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 05/14/2024] [Accepted: 05/30/2024] [Indexed: 06/11/2024]
Abstract
Antimicrobial resistance (AMR) in oceans poses a significant threat to human health through the seafood supply chain. Ammonia-oxidizing archaea (AOA) are important marine microorganisms and play a key role in the biogeochemical nitrogen cycle around the world. However, the AMR of marine AOA to aquicultural antibiotics is poorly explored. Here, Raman-deuterium isotope probing (Raman-DIP), a single-cell tool, was developed to reveal the AMR of a typical marine species of AOA, Nitrosopumilus maritimus (designated SCM1), against six antibiotics, including erythromycin, tetracycline, novobiocin, neomycin, bacitracin, and vancomycin. The D2O concentration (30% v/v) and culture period (9 days) were optimized for the precise detection of metabolic activity in SCM1 cells through Raman-DIP. The relative metabolic activity of SCM1 upon exposure to antibiotics was semi-quantitatively calculated based on single-cell Raman spectra. SCM1 exhibited high resistance to erythromycin, tetracycline, novobiocin, neomycin, and vancomycin, with minimum inhibitory concentration (MIC) values between 100 and 400 mg/L, while SCM1 is very sensitive to bacitracin (MIC: 0.8 mg/L). Notably, SCM1 cells were completely inactive under the metabolic activity minimum inhibitory concentration conditions (MA-MIC: 1.6-800 mg/L) for the six antibiotics. Further genomic analysis revealed the antibiotic resistance genes (ARGs) of SCM1, including 14 types categorized into 33 subtypes. This work increases our knowledge of the AMR of marine AOA by linking the resistant phenome to the genome, contributing to the risk assessment of AMR in the underexplored ocean environment. As antibiotic resistance in marine microorganisms is significantly affected by the concentration of antibiotics in coastal environments, we encourage more studies concentrating on both the phenotypic and genotypic antibiotic resistance of marine archaea. This may facilitate a comprehensive evaluation of the capacity of marine microorganisms to spread AMR and the implementation of suitable control measures to protect environmental safety and human health.
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Affiliation(s)
- Lingchao Kong
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China; Eastern Institute for Advanced Study, Eastern Institute of Technology, Ningbo, 315200, China
| | - Yi Wang
- Shenzhen Key Laboratory of Marine Archaea Geo-Omics, Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China; Eastern Institute for Advanced Study, Eastern Institute of Technology, Ningbo, 315200, China.
| | - Dongyu Cui
- Shenzhen Key Laboratory of Marine Archaea Geo-Omics, Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Wei He
- Shenzhen Key Laboratory of Marine Archaea Geo-Omics, Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Chuanlun Zhang
- Shenzhen Key Laboratory of Marine Archaea Geo-Omics, Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Chunmiao Zheng
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China; Eastern Institute for Advanced Study, Eastern Institute of Technology, Ningbo, 315200, China
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4
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Sharaf A, Nesengani LT, Hayah I, Kuja JO, Mdyogolo S, Omotoriogun TC, Odogwu BA, Beedessee G, Smith RM, Barakat A, Moila AM, El Hamouchi A, Benkahla A, Boukteb A, Elmouhtadi A, Mafwila AL, Abushady AM, Elsherif AK, Ahmed B, Wairuri C, Ndiribe CC, Ebuzome C, Kinnear CJ, Ndlovu DF, Iraqi D, El Fahime E, Assefa E, Ouardi F, Belharfi FZ, Tmimi FZ, Markey FB, Radouani F, Zeukeng F, Mvumbi GL, Ganesan H, Hanachi M, Nigussie H, Charoute H, Benamri I, Mkedder I, Haddadi I, Meftah-Kadmiri I, Mubiru JF, Domelevo Entfellner JBK, Rokani JB, Ogwang J, Daiga JB, Omumbo J, Ideozu JE, Errafii K, Labuschagne K, Komi KK, Tonfack LB, Hadjeras L, Ramantswana M, Chaisi M, Botes MW, Kilian M, Kvas M, Melloul M, Chaouch M, Khyatti M, Abdo M, Phasha-Muchemenye M, Hijri M, Mediouni MR, Hassan MA, Piro M, Mwale M, Maaloum M, Mavhunga M, Olivier NA, Aminou O, Arbani O, Souiai O, Djocgoue PF, Mentag R, Zipfel RD, Tata RB, Megnekou R, Muzemil S, Paez S, Salifu SP, Kagame SP, Selka S, Edwards S, Gaouar SBS, Reda SRA, Fellahi S, Khayi S, Ayed S, Madisha T, Sahil T, Udensi OU, Ras V, Ezebuiro V, Duru VC, David X, Geberemichael Y, Tchiechoua YH, Mungloo-Dilmohamud Z, Chen Z, Happi C, Kariuki T, Ziyomo C, Djikeng A, Badaoui B, Mapholi N, Muigai A, Osuji JO, Ebenezer TE. Establishing African genomics and bioinformatics programs through annual regional workshops. Nat Genet 2024:10.1038/s41588-024-01807-6. [PMID: 38977855 DOI: 10.1038/s41588-024-01807-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Accepted: 05/22/2024] [Indexed: 07/10/2024]
Abstract
The African BioGenome Project (AfricaBP) Open Institute for Genomics and Bioinformatics aims to overcome barriers to capacity building through its distributed African regional workshops and prioritizes the exchange of grassroots knowledge and innovation in biodiversity genomics and bioinformatics. In 2023, we implemented 28 workshops on biodiversity genomics and bioinformatics, covering 11 African countries across the 5 African geographical regions. These regional workshops trained 408 African scientists in hands-on molecular biology, genomics and bioinformatics techniques as well as the ethical, legal and social issues associated with acquiring genetic resources. Here, we discuss the implementation of transformative strategies, such as expanding the regional workshop model of AfricaBP to involve multiple countries, institutions and partners, including the proposed creation of an African digital database with sequence information relating to both biodiversity and agriculture. This will ultimately help create a critical mass of skilled genomics and bioinformatics scientists across Africa.
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Affiliation(s)
- Abdoallah Sharaf
- SequAna Core Facility, Department of Biology, University of Konstanz, Konstanz, Germany
- Genetics Department, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
| | - Lucky Tendani Nesengani
- College of Agriculture and Environmental Sciences, University of South Africa, Florida, South Africa
| | - Ichrak Hayah
- Laboratory of Biodiversity, Ecology, and Genome, Department of Biology, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco
| | | | - Sinebongo Mdyogolo
- College of Agriculture and Environmental Sciences, University of South Africa, Florida, South Africa
| | - Taiwo Crossby Omotoriogun
- Department of Biological Sciences, Elizade University, Ilara-Mokin, Nigeria
- A. P. Leventis Ornithological Research Institute, University of Jos, Jos, Nigeria
| | - Blessing Adanta Odogwu
- Regional Centre for Biotechnology and Bioresources Research, University of Port Harcourt, Port Harcourt, Nigeria
- South-South Zonal Centre of Excellence, National Biotechnology Development Agency, Port Harcourt, Nigeria
| | - Girish Beedessee
- Department of Applied Sciences, Faculty of Health and Life Sciences, Northumbria University, Newcastle-upon-Tyne, UK
| | - Rae Marvin Smith
- College of Agriculture and Environmental Sciences, University of South Africa, Florida, South Africa
| | | | | | - Adil El Hamouchi
- Research Department, Institut Pasteur du Maroc, Casablanca, Morocco
| | - Alia Benkahla
- Laboratory of Bioinformatics, Biomathematics and Biostatistics-LR16IPT09, Institut Pasteur de Tunis, Université de Tunis El Manar, Tunis, Tunisia
| | - Amal Boukteb
- Field Crops Laboratory, National Institute of Agricultural Research of Tunisia (INRAT), University of Carthage, Tunis, Tunisia
| | - Amine Elmouhtadi
- Biotechnology Research Unit, Regional Center of Agricultural Research of Rabat, National Institute of Agricultural Research, Rabat, Morocco
| | - Antoine Lusala Mafwila
- Laboratory of Molecular Biology, Department of Basic Sciences, University of Kinshasa, Kinshasa, Democratic Republic of Congo
| | - Asmaa Mohammed Abushady
- Genetics Department, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
- Biotechnology School, Nile University, Giza, Egypt
| | | | - Bulbul Ahmed
- African Genome Center, University Mohammed VI Polytechnic (UM6P), Ben Guerir, Morocco
| | | | | | | | - Craig J Kinnear
- South African Medical Research Council Genomics Platform, Cape Town, South Africa
| | | | - Driss Iraqi
- Biotechnology Research Unit, Regional Center of Agricultural Research of Rabat, National Institute of Agricultural Research, Rabat, Morocco
| | | | - Ermias Assefa
- Bio and Emerging Technology Institute, Addis Ababa, Ethiopia
| | - Faissal Ouardi
- Faculty of Sciences, Mohammed V University, Rabat, Morocco
| | - Fatima Zohra Belharfi
- Applied Genetics in Agriculture, Ecology and Public Health Laboratory, University of Abou Bekr Belkaid Tlemcen, Tlemcen, Algeria
| | | | - Fatu Badiane Markey
- Science for Africa Foundation, Nairobi, Kenya
- Rutgers University-Newark, Newark, NJ, USA
| | - Fouzia Radouani
- Research Department, Institut Pasteur du Maroc, Casablanca, Morocco
| | - Francis Zeukeng
- Biotechnology Centre, University of Yaoundé 1, Yaoundé, Cameroon
| | - Georges Lelo Mvumbi
- Laboratory of Molecular Biology, Department of Basic Sciences, University of Kinshasa, Kinshasa, Democratic Republic of Congo
| | | | - Mariem Hanachi
- Laboratory of Bioinformatics, Biomathematics and Biostatistics-LR16IPT09, Institut Pasteur de Tunis, Université de Tunis El Manar, Tunis, Tunisia
| | - Helen Nigussie
- Department of Microbial Cellular and Molecular Biology, Addis Ababa University, Addis Ababa, Ethiopia
| | - Hicham Charoute
- Research Department, Institut Pasteur du Maroc, Casablanca, Morocco
| | - Ichrak Benamri
- Research Department, Institut Pasteur du Maroc, Casablanca, Morocco
| | - Ikram Mkedder
- Applied Genetics in Agriculture, Ecology and Public Health Laboratory, University of Abou Bekr Belkaid Tlemcen, Tlemcen, Algeria
| | - Imane Haddadi
- Applied Genetics in Agriculture, Ecology and Public Health Laboratory, University of Abou Bekr Belkaid Tlemcen, Tlemcen, Algeria
| | - Issam Meftah-Kadmiri
- Plant and Microbial Biotechnology Center, Moroccan Foundation for Advanced Science, Innovation and Research, University Mohammed VI Polytechnic, Ben Guerir, Morocco
| | - Jackson Franco Mubiru
- Department of Breeding and Reproduction, National Animal Genetic Resources Centre and Data Bank, Entebbe, Uganda
| | | | - Joan Bayowa Rokani
- Department of Breeding and Reproduction, National Animal Genetic Resources Centre and Data Bank, Entebbe, Uganda
| | - Joel Ogwang
- Department of Breeding and Reproduction, National Animal Genetic Resources Centre and Data Bank, Entebbe, Uganda
| | | | - Judy Omumbo
- Science for Africa Foundation, Nairobi, Kenya
| | | | - Khaoula Errafii
- African Genome Center, University Mohammed VI Polytechnic (UM6P), Ben Guerir, Morocco
| | - Kim Labuschagne
- Foundational Biodiversity Science, South African National Biodiversity Institute, Pretoria, South Africa
| | - Komi Koukoura Komi
- Laboratoire des Sciences Biomédicales, Alimentaires et de Santé Environnementale (LaSBASE), Département des Analyses Biomédicales (AMB), Ecole Supérieure des Techniques Biologiques et Alimentaires (ESTBA), Université de Lomé, Lomé, Togo
| | | | | | | | - Mamohale Chaisi
- Foundational Biodiversity Science, South African National Biodiversity Institute, Pretoria, South Africa
| | - Marietjie W Botes
- Division of Medicine, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
| | | | - Marija Kvas
- Separations (Pty) Ltd, Johannesburg, South Africa
| | - Marouane Melloul
- National Center for Scientific and Technical Research, Rabat, Morocco
| | - Melek Chaouch
- Laboratory of Bioinformatics, Biomathematics and Biostatistics-LR16IPT09, Institut Pasteur de Tunis, Université de Tunis El Manar, Tunis, Tunisia
| | - Meriem Khyatti
- Research Department, Institut Pasteur du Maroc, Casablanca, Morocco
| | | | | | - Mohamed Hijri
- African Genome Center, University Mohammed VI Polytechnic (UM6P), Ben Guerir, Morocco
| | - Mohammed Rida Mediouni
- Applied Genetics in Agriculture, Ecology and Public Health Laboratory, University of Abou Bekr Belkaid Tlemcen, Tlemcen, Algeria
| | | | - Mohammed Piro
- Veterinary Genetic Analysis Laboratory, Hassan II Agronomy and Veterinary Institute (IAV), Rabat, Morocco
| | - Monica Mwale
- Foundational Biodiversity Science, South African National Biodiversity Institute, Pretoria, South Africa
| | | | - Mudzuli Mavhunga
- Foundational Biodiversity Science, South African National Biodiversity Institute, Pretoria, South Africa
| | - Nicholas Abraham Olivier
- Department of Plant and Soil Sciences, University of Pretoria, Pretoria, South Africa
- Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria, South Africa
| | - Oumaima Aminou
- Veterinary Genetic Analysis Laboratory, Hassan II Agronomy and Veterinary Institute (IAV), Rabat, Morocco
| | - Oumayma Arbani
- Department of Veterinary Pathology and Public Health, Hassan II Agronomy and Veterinary Institute (IAV), Rabat, Morocco
| | - Oussema Souiai
- Laboratory of Bioinformatics, Biomathematics and Biostatistics-LR16IPT09, Institut Pasteur de Tunis, Université de Tunis El Manar, Tunis, Tunisia
| | | | - Rachid Mentag
- Biotechnology Research Unit, Regional Center of Agricultural Research of Rabat, National Institute of Agricultural Research, Rabat, Morocco
| | - Renate Dorothea Zipfel
- Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria, South Africa
- Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Pretoria, South Africa
| | | | - Rosette Megnekou
- Biotechnology Centre, University of Yaoundé 1, Yaoundé, Cameroon
| | | | - Sadye Paez
- Department of Neurogenetics of Language, Rockefeller University, New York, NY, USA
| | - Samson Pandam Salifu
- Faculty of Bioscience, College of Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | | | - Sarra Selka
- Applied Genetics in Agriculture, Ecology and Public Health Laboratory, University of Abou Bekr Belkaid Tlemcen, Tlemcen, Algeria
| | | | - Semir Bechir Suheil Gaouar
- Applied Genetics in Agriculture, Ecology and Public Health Laboratory, University of Abou Bekr Belkaid Tlemcen, Tlemcen, Algeria
| | | | - Siham Fellahi
- Veterinary Genetic Analysis Laboratory, Hassan II Agronomy and Veterinary Institute (IAV), Rabat, Morocco
| | - Slimane Khayi
- Biotechnology Research Unit, Regional Center of Agricultural Research of Rabat, National Institute of Agricultural Research, Rabat, Morocco
| | - Soumia Ayed
- Applied Genetics in Agriculture, Ecology and Public Health Laboratory, University of Abou Bekr Belkaid Tlemcen, Tlemcen, Algeria
| | - Thabang Madisha
- Agricultural Research Council, Biotechnology Platform, Pretoria, South Africa
| | | | | | - Verena Ras
- University of Cape Town, Cape Town, South Africa
| | - Victor Ezebuiro
- Regional Centre for Biotechnology and Bioresources Research, University of Port Harcourt, Port Harcourt, Nigeria
- South-South Zonal Centre of Excellence, National Biotechnology Development Agency, Port Harcourt, Nigeria
| | - Vincent C Duru
- Department of Parasitology and Entomology, Nnamdi Azikiwe University, Awka, Nigeria
| | | | | | - Yves H Tchiechoua
- Department of Biology, Chemistry and Pharmacy, Free University Berlin, Berlin, Germany
| | | | | | - Christian Happi
- African Centre of Excellence for Genomics of Infectious Diseases, Redeemer's University, Ede, Nigeria
| | | | | | - Appolinaire Djikeng
- College of Agriculture and Environmental Sciences, University of South Africa, Florida, South Africa
- International Livestock Research Institute, Nairobi, Kenya
- Centre for Tropical Livestock Genetics and Health (CTLGH), Roslin Institute, University of Edinburgh, Edinburgh, UK
| | - Bouabid Badaoui
- Laboratory of Biodiversity, Ecology, and Genome, Department of Biology, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco.
- African Sustainable Agriculture Research Institute (ASARI), Mohammed VI Polytechnic University (UM6P), Laâyoune, Morocco.
| | - Ntanganedzeni Mapholi
- College of Agriculture and Environmental Sciences, University of South Africa, Florida, South Africa.
| | - Anne Muigai
- National Defence University-Kenya, Nakuru, Kenya.
- Jomo Kenyatta University of Agriculture and Technology, Juja, Kenya.
| | - Julian O Osuji
- Regional Centre for Biotechnology and Bioresources Research, University of Port Harcourt, Port Harcourt, Nigeria.
- South-South Zonal Centre of Excellence, National Biotechnology Development Agency, Port Harcourt, Nigeria.
- Department of Plant Science and Biotechnology, University of Port Harcourt, Port Harcourt, Nigeria.
| | - ThankGod Echezona Ebenezer
- Early Cancer Institute, Department of Oncology, School of Clinical Medicine, University of Cambridge, Cambridge, UK.
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5
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Hu Y, Wang Y, Wang R, Wang X, Liu SJ. Dirammox-dominated microbial community for biological nitrogen removal from wastewater. Appl Microbiol Biotechnol 2024; 108:389. [PMID: 38904674 PMCID: PMC11192851 DOI: 10.1007/s00253-024-13214-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Revised: 04/15/2024] [Accepted: 05/27/2024] [Indexed: 06/22/2024]
Abstract
Direct ammonia oxidation (Dirammox) might be of great significance to advance the innovation of biological nitrogen removal process in wastewater treatment systems. However, it remains unknown whether Dirammox bacteria can be selectively enriched in activated sludge. In this study, a lab-scale bioreactor was established and operated for 2 months to treat synthetic wastewater with hydroxylamine as a selection pressure. Three Dirammox strains (Alcaligenes aquatilis SDU_AA1, Alcaligenes aquatilis SDU_AA2, and Alcaligenes sp. SDU_A2) were isolated from the activated sludge, and their capability to perform Dirammox process was confirmed. Although these three Dirammox bacteria were undetectable in the seed sludge (0%), their relative abundances rapidly increased after a month of operation, reaching 12.65%, 0.69%, and 0.69% for SDU_A2, SDU_AA1, and SDU_AA2, respectively. Among them, the most dominant Dirammox (SDU_A2) exhibited higher nitrogen removal rate (32.35%) than the other two strains (13.57% of SDU_AA1 and 14.52% of SDU_AA2). Comparative genomic analysis demonstrated that the most dominant Dirammox bacterium (SDU_A2) possesses fewer complete metabolic modules compared to the other two less abundant Alcaligenes strains. Our findings expanded the understanding of the application of Dirammox bacteria as key functional microorganisms in a novel biological nitrogen and carbon removal process if they could be well stabilized. KEY POINTS: • Dirammox-dominated microbial community was enriched in activated sludge bioreactor. • The addition of hydroxylamine played a role in Dirammox enrichment. • Three Dirammox bacterial strains, including one novel species, were isolated.
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Affiliation(s)
- Yu Hu
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, P. R. China
| | - Yulin Wang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, P. R. China.
| | - Runhua Wang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
| | - Xiaokang Wang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
| | - Shuang-Jiang Liu
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, P. R. China.
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, P. R. China.
- University of Chinese Academy of Sciences, Beijing, P. R. China.
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6
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Bouras G, Judd LM, Edwards RA, Vreugde S, Stinear TP, Wick RR. How low can you go? Short-read polishing of Oxford Nanopore bacterial genome assemblies. Microb Genom 2024; 10:001254. [PMID: 38833287 PMCID: PMC11261834 DOI: 10.1099/mgen.0.001254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Accepted: 04/30/2024] [Indexed: 06/06/2024] Open
Abstract
It is now possible to assemble near-perfect bacterial genomes using Oxford Nanopore Technologies (ONT) long reads, but short-read polishing is usually required for perfection. However, the effect of short-read depth on polishing performance is not well understood. Here, we introduce Pypolca (with default and careful parameters) and Polypolish v0.6.0 (with a new careful parameter). We then show that: (1) all polishers other than Pypolca-careful, Polypolish-default and Polypolish-careful commonly introduce false-positive errors at low read depth; (2) most of the benefit of short-read polishing occurs by 25× depth; (3) Polypolish-careful almost never introduces false-positive errors at any depth; and (4) Pypolca-careful is the single most effective polisher. Overall, we recommend the following polishing strategies: Polypolish-careful alone when depth is very low (<5×), Polypolish-careful and Pypolca-careful when depth is low (5-25×), and Polypolish-default and Pypolca-careful when depth is sufficient (>25×).
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Affiliation(s)
- George Bouras
- Adelaide Medical School, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, Australia
- The Department of Surgery – Otolaryngology Head and Neck Surgery, University of Adelaide and the Basil Hetzel Institute for Translational Health Research, Central Adelaide Local Health Network, South Australia, Australia
| | - Louise M. Judd
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Australia
| | - Robert A. Edwards
- Flinders Accelerator for Microbiome Exploration, College of Science and Engineering, Flinders University, Adelaide, Australia
| | - Sarah Vreugde
- Adelaide Medical School, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, Australia
- The Department of Surgery – Otolaryngology Head and Neck Surgery, University of Adelaide and the Basil Hetzel Institute for Translational Health Research, Central Adelaide Local Health Network, South Australia, Australia
| | - Timothy P. Stinear
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Australia
| | - Ryan R. Wick
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Australia
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7
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Kim J, Steinegger M. Metabuli: sensitive and specific metagenomic classification via joint analysis of amino acid and DNA. Nat Methods 2024; 21:971-973. [PMID: 38769467 DOI: 10.1038/s41592-024-02273-y] [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: 06/14/2023] [Accepted: 04/11/2024] [Indexed: 05/22/2024]
Abstract
Metagenomic taxonomic classifiers analyze either DNA or amino acid (AA) sequences. Metabuli ( https://metabuli.steineggerlab.com ), however, jointly analyzes both DNA and AA to leverage AA conservation for sensitive homology detection and DNA mutations for specific differentiation of closely related taxa. In the Critical Assessment of Metagenome Interpretation 2 plant-associated dataset, Metabuli covered 99% and 98% of classifications of state-of-the-art DNA- and AA-based classifiers, respectively.
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Affiliation(s)
- Jaebeom Kim
- Interdisciplinary Program in Bioinformatics, Seoul National University, Seoul, Republic of Korea
| | - Martin Steinegger
- Interdisciplinary Program in Bioinformatics, Seoul National University, Seoul, Republic of Korea.
- School of Biological Sciences, Seoul National University, Seoul, Republic of Korea.
- Institute of Molecular Biology and Genetics, Seoul National University, Seoul, Republic of Korea.
- Artificial Intelligence Institute, Seoul National University, Seoul, Republic of Korea.
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8
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Hewel C, Schmidt H, Runkel S, Kohnen W, Schweiger-Seemann S, Michel A, Bikar SE, Lieb B, Plachter B, Hankeln T, Linke M, Gerber S. Nanopore adaptive sampling of a metagenomic sample derived from a human monkeypox case. J Med Virol 2024; 96:e29610. [PMID: 38654702 DOI: 10.1002/jmv.29610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 03/18/2024] [Accepted: 04/05/2024] [Indexed: 04/26/2024]
Abstract
In 2022, a series of human monkeypox cases in multiple countries led to the largest and most widespread outbreak outside the known endemic areas. Setup of proper genomic surveillance is of utmost importance to control such outbreaks. To this end, we performed Nanopore (PromethION P24) and Illumina (NextSeq. 2000) Whole Genome Sequencing (WGS) of a monkeypox sample. Adaptive sampling was applied for in silico depletion of the human host genome, allowing for the enrichment of low abundance viral DNA without a priori knowledge of sample composition. Nanopore sequencing allowed for high viral genome coverage, tracking of sample composition during sequencing, strain determination, and preliminary assessment of mutational pattern. In addition to that, only Nanopore data allowed us to resolve the entire monkeypox virus genome, with respect to two structural variants belonging to the genes OPG015 and OPG208. These SVs in important host range genes seem stable throughout the outbreak and are frequently misassembled and/or misannotated due to the prevalence of short read sequencing or short read first assembly. Ideally, standalone standard Illumina sequencing should not be used for Monkeypox WGS and de novo assembly, since it will obfuscate the structure of the genome, which has an impact on the quality and completeness of the genomes deposited in public databases and thus possibly on the ability to evaluate the complete genetic reason for the host range change of monkeypox in the current pandemic.
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Affiliation(s)
- Charlotte Hewel
- Institute of Human Genetics, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Hanno Schmidt
- SARS-CoV-2 Sequencing Consortium Mainz, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- Institute for Virology and Research Center for Immunotherapy (FZI), University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Stefan Runkel
- SARS-CoV-2 Sequencing Consortium Mainz, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- Transfusion Unit & Test Center, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Wolfgang Kohnen
- SARS-CoV-2 Sequencing Consortium Mainz, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- Department of Hygiene and Infection Prevention, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Susann Schweiger-Seemann
- Institute of Human Genetics, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- SARS-CoV-2 Sequencing Consortium Mainz, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - André Michel
- SARS-CoV-2 Sequencing Consortium Mainz, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- Medical Management Department, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Sven-Ernö Bikar
- SARS-CoV-2 Sequencing Consortium Mainz, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- StarSEQ GmbH, Mainz, Germany
| | | | - Bodo Plachter
- SARS-CoV-2 Sequencing Consortium Mainz, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- Institute for Virology and Research Center for Immunotherapy (FZI), University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Thomas Hankeln
- SARS-CoV-2 Sequencing Consortium Mainz, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- Faculty of Biology, Institute of Organismic and Molecular Evolution, Molecular Genetics & Genome Analysis, Johannes Gutenberg University of Mainz, Mainz, Germany
| | - Matthias Linke
- Institute of Human Genetics, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- SARS-CoV-2 Sequencing Consortium Mainz, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Susanne Gerber
- Institute of Human Genetics, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- SARS-CoV-2 Sequencing Consortium Mainz, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
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9
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Gand M, Navickaite I, Bartsch LJ, Grützke J, Overballe-Petersen S, Rasmussen A, Otani S, Michelacci V, Matamoros BR, González-Zorn B, Brouwer MSM, Di Marcantonio L, Bloemen B, Vanneste K, Roosens NHCJ, AbuOun M, De Keersmaecker SCJ. Towards facilitated interpretation of shotgun metagenomics long-read sequencing data analyzed with KMA for the detection of bacterial pathogens and their antimicrobial resistance genes. Front Microbiol 2024; 15:1336532. [PMID: 38659981 PMCID: PMC11042533 DOI: 10.3389/fmicb.2024.1336532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 02/29/2024] [Indexed: 04/26/2024] Open
Abstract
Metagenomic sequencing is a promising method that has the potential to revolutionize the world of pathogen detection and antimicrobial resistance (AMR) surveillance in food-producing environments. However, the analysis of the huge amount of data obtained requires performant bioinformatics tools and databases, with intuitive and straightforward interpretation. In this study, based on long-read metagenomics data of chicken fecal samples with a spike-in mock community, we proposed confidence levels for taxonomic identification and AMR gene detection, with interpretation guidelines, to help with the analysis of the output data generated by KMA, a popular k-mer read alignment tool. Additionally, we demonstrated that the completeness and diversity of the genomes present in the reference databases are key parameters for accurate and easy interpretation of the sequencing data. Finally, we explored whether KMA, in a two-step procedure, can be used to link the detected AMR genes to their bacterial host chromosome, both detected within the same long-reads. The confidence levels were successfully tested on 28 metagenomics datasets which were obtained with sequencing of real and spiked samples from fecal (chicken, pig, and buffalo) or food (minced beef and food enzyme products) origin. The methodology proposed in this study will facilitate the analysis of metagenomics sequencing datasets for KMA users. Ultimately, this will contribute to improvements in the rapid diagnosis and surveillance of pathogens and AMR genes in food-producing environments, as prioritized by the EU.
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Affiliation(s)
- Mathieu Gand
- Transversal Activities in Applied Genomics, Sciensano, Brussels, Belgium
| | - Indre Navickaite
- Department of Bacteriology, Animal and Plant Health Agency, Weybridge, United Kingdom
| | - Lee-Julia Bartsch
- Department of Biological Safety, German Federal Institute for Risk Assessment, Berlin, Germany
| | - Josephine Grützke
- Department of Biological Safety, German Federal Institute for Risk Assessment, Berlin, Germany
| | | | - Astrid Rasmussen
- Bacterial Reference Center, Statens Serum Institute, Copenhagen, Denmark
| | - Saria Otani
- National Food Institute, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Valeria Michelacci
- Department of Food Safety, Nutrition and Veterinary Public Health, Istituto Superiore di Sanità, Rome, Italy
| | | | - Bruno González-Zorn
- Department of Animal Health, Complutense University of Madrid, Madrid, Spain
| | - Michael S. M. Brouwer
- Wageningen Bioveterinary Research Part of Wageningen University and Research, Lelystad, Netherlands
| | - Lisa Di Marcantonio
- Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise “G. Caporale”, Teramo, Italy
| | - Bram Bloemen
- Transversal Activities in Applied Genomics, Sciensano, Brussels, Belgium
| | - Kevin Vanneste
- Transversal Activities in Applied Genomics, Sciensano, Brussels, Belgium
| | | | - Manal AbuOun
- Department of Bacteriology, Animal and Plant Health Agency, Weybridge, United Kingdom
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10
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Cook R, Telatin A, Hsieh SY, Newberry F, Tariq MA, Baker DJ, Carding SR, Adriaenssens EM. Nanopore and Illumina sequencing reveal different viral populations from human gut samples. Microb Genom 2024; 10. [PMID: 38683195 DOI: 10.1099/mgen.0.001236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2024] Open
Abstract
The advent of viral metagenomics, or viromics, has improved our knowledge and understanding of global viral diversity. High-throughput sequencing technologies enable explorations of the ecological roles, contributions to host metabolism, and the influence of viruses in various environments, including the human intestinal microbiome. However, bacterial metagenomic studies frequently have the advantage. The adoption of advanced technologies like long-read sequencing has the potential to be transformative in refining viromics and metagenomics. Here, we examined the effectiveness of long-read and hybrid sequencing by comparing Illumina short-read and Oxford Nanopore Technology (ONT) long-read sequencing technologies and different assembly strategies on recovering viral genomes from human faecal samples. Our findings showed that if a single sequencing technology is to be chosen for virome analysis, Illumina is preferable due to its superior ability to recover fully resolved viral genomes and minimise erroneous genomes. While ONT assemblies were effective in recovering viral diversity, the challenges related to input requirements and the necessity for amplification made it less ideal as a standalone solution. However, using a combined, hybrid approach enabled a more authentic representation of viral diversity to be obtained within samples.
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Affiliation(s)
- Ryan Cook
- Quadram Institute Bioscience, Norwich, NR4 7UQ, UK
| | | | | | - Fiona Newberry
- Department of Biosciences, Nottingham Trent University, Nottingham, NG11 8NS, UK
| | - Mohammad A Tariq
- Faculty of Health and Life Sciences, University of Northumbria, Newcastle upon Tyne, NE1 8ST, UK
| | - Dave J Baker
- Quadram Institute Bioscience, Norwich, NR4 7UQ, UK
| | - Simon R Carding
- Quadram Institute Bioscience, Norwich, NR4 7UQ, UK
- Norwich Medical School, University of East Anglia, Norwich, NR4 7TJ, UK
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11
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Littleford-Colquhoun B, Kartzinel TR. A CRISPR-based strategy for targeted sequencing in biodiversity science. Mol Ecol Resour 2024; 24:e13920. [PMID: 38153158 DOI: 10.1111/1755-0998.13920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 11/10/2023] [Accepted: 12/13/2023] [Indexed: 12/29/2023]
Abstract
Many applications in molecular ecology require the ability to match specific DNA sequences from single- or mixed-species samples with a diagnostic reference library. Widely used methods for DNA barcoding and metabarcoding employ PCR and amplicon sequencing to identify taxa based on target sequences, but the target-specific enrichment capabilities of CRISPR-Cas systems may offer advantages in some applications. We identified 54,837 CRISPR-Cas guide RNAs that may be useful for enriching chloroplast DNA across phylogenetically diverse plant species. We tested a subset of 17 guide RNAs in vitro to enrich plant DNA strands ranging in size from diagnostic DNA barcodes of 1,428 bp to entire chloroplast genomes of 121,284 bp. We used an Oxford Nanopore sequencer to evaluate sequencing success based on both single- and mixed-species samples, which yielded mean chloroplast sequence lengths of 2,530-11,367 bp, depending on the experiment. In comparison to mixed-species experiments, single-species experiments yielded more on-target sequence reads and greater mean pairwise identity between contigs and the plant species' reference genomes. But nevertheless, these mixed-species experiments yielded sufficient data to provide ≥48-fold increase in sequence length and better estimates of relative abundance for a commercially prepared mixture of plant species compared to DNA metabarcoding based on the chloroplast trnL-P6 marker. Prior work developed CRISPR-based enrichment protocols for long-read sequencing and our experiments pioneered its use for plant DNA barcoding and chloroplast assemblies that may have advantages over workflows that require PCR and short-read sequencing. Future work would benefit from continuing to develop in vitro and in silico methods for CRISPR-based analyses of mixed-species samples, especially when the appropriate reference genomes for contig assembly cannot be known a priori.
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Affiliation(s)
- Bethan Littleford-Colquhoun
- Department of Ecology, Evolution, and Organismal Biology, Brown University, Providence, Rhode Island, USA
- Institute at Brown for Environment and Society, Brown University, Providence, Rhode Island, USA
| | - Tyler R Kartzinel
- Department of Ecology, Evolution, and Organismal Biology, Brown University, Providence, Rhode Island, USA
- Institute at Brown for Environment and Society, Brown University, Providence, Rhode Island, USA
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12
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Wang C, Yin X, Xu X, Wang D, Liu L, Zhang X, Yang C, Zhang X, Zhang T. Metagenomic absolute quantification of antibiotic resistance genes and virulence factor genes-carrying bacterial genomes in anaerobic digesters. WATER RESEARCH 2024; 253:121258. [PMID: 38359594 DOI: 10.1016/j.watres.2024.121258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 02/01/2024] [Accepted: 02/02/2024] [Indexed: 02/17/2024]
Abstract
Sewage treatment works have been considered as hotspots for the dissemination of antibiotic resistance genes (ARGs). Anaerobic digestion (AD) has emerged as a promising approach for controlling the spread of ARGs while destroying biomass in sludge. Evaluating the impact of AD on ARG removal relies on the absolute quantification of ARGs. In this study, we quantified the ARG concentrations in both full-scale and lab-scale AD systems using a cellular spike-ins based absolute quantification approach. Results demonstrated that AD effectively removed 68 ± 18 %, 55 ± 12 %, and 57 ± 19 % of total ARGs in semi-continuous AD digesters, with solid retention times of 15, 20, and 25 days, respectively. The removal efficiency of total ARGs increased as the AD process progressed in the batch digesters over 40 days. A significant negative correlation was observed between digestion time and the concentrations of certain ARG types, such as beta-lactam, sulfonamide, and tetracycline. However, certain potential pathogenic antibiotic resistant bacteria (PARB) and multi-resistant high-risk ARGs-carrying populations robustly persisted throughout the AD process, regardless of the operating conditions. This study highlighted the influence of the AD process and its operating parameters on ARG removal, and revealed the broad spectrum and persistence of PARB in AD systems. These findings provided critical insights for the management of microbial hazards.
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Affiliation(s)
- Chunxiao Wang
- Environmental Microbiome Engineering and Biotechnology Laboratory, Centre for Environmental Engineering Research, Department of Civil Engineering, The University of Hong Kong, Hong Kong, China
| | - Xiaole Yin
- Environmental Microbiome Engineering and Biotechnology Laboratory, Centre for Environmental Engineering Research, Department of Civil Engineering, The University of Hong Kong, Hong Kong, China
| | - Xiaoqing Xu
- Environmental Microbiome Engineering and Biotechnology Laboratory, Centre for Environmental Engineering Research, Department of Civil Engineering, The University of Hong Kong, Hong Kong, China
| | - Dou Wang
- Environmental Microbiome Engineering and Biotechnology Laboratory, Centre for Environmental Engineering Research, Department of Civil Engineering, The University of Hong Kong, Hong Kong, China
| | - Lei Liu
- Environmental Microbiome Engineering and Biotechnology Laboratory, Centre for Environmental Engineering Research, Department of Civil Engineering, The University of Hong Kong, Hong Kong, China
| | - Xuanwei Zhang
- Environmental Microbiome Engineering and Biotechnology Laboratory, Centre for Environmental Engineering Research, Department of Civil Engineering, The University of Hong Kong, Hong Kong, China
| | - Chao Yang
- Key Laboratory of Molecular Microbiology and Technology for Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Xiangru Zhang
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, China
| | - Tong Zhang
- Environmental Microbiome Engineering and Biotechnology Laboratory, Centre for Environmental Engineering Research, Department of Civil Engineering, The University of Hong Kong, Hong Kong, China; School of Public Health, The University of Hong Kong, Hong Kong, China; Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau SAR, China.
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13
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Liu H, Jiao P, Guan L, Wang C, Zhang XX, Ma L. Functional traits and health implications of the global household drinking-water microbiome retrieved using an integrative genome-centric approach. WATER RESEARCH 2024; 250:121094. [PMID: 38183799 DOI: 10.1016/j.watres.2023.121094] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 12/15/2023] [Accepted: 12/29/2023] [Indexed: 01/08/2024]
Abstract
The biological safety of drinking water plays a crucial role in public health protection. However, research on the drinking water microbiome remains in its infancy, especially little is known about the potentially pathogenic bacteria in and functional characteristics of the microbiome in household tap water that people are directly exposed to. In this study, we used a genomic-centric approach to construct a genetic catalogue of the drinking water microbiome by analysing 116 metagenomic datasets of household tap water worldwide, spanning nine countries/regions on five continents. We reconstructed 859 high-quality metagenome-assembled genomes (MAGs) spanning 27 bacterial and 2 archaeal phyla, and found that the core MAGs belonging to the phylum Proteobacteria encoded the highest metabolic functional diversity of the 33 key complete metabolic modules. In particular, we found that two core MAGs of Brevibacillus and Methylomona encoded genes for methane metabolism, which may support the growth of heterotrophic organisms observed in the oligotrophic ecosystem. Four MAGs of complete ammonia oxidation (comammox) Nitrospira were identified and functional metabolic analysis suggested these may enable mixotrophic growth and encode genes for reactive oxygen stress defence and arsenite reduction that could aid survival in the environment of oligotrophic drinking water systems. Four MAGs were annotated as potentially pathogenic bacteria (PPB) and thus represented a possible public health concern. They belonged to the genera Acinetobacter (n = 3) and Mycobacterium (n = 1), with a total relative abundance of 1.06 % in all samples. The genomes of PPB A. junii and A. ursingii were discovered to contain antibiotic resistance genes and mobile genetic elements that could contribute to antimicrobial dissemination in drinking water. Further network analysis suggested that symbiotic microbes which support the growth of pathogenic bacteria can be targets for future surveillance and removal.
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Affiliation(s)
- Huafeng Liu
- School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China
| | - Pengbo Jiao
- School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China
| | - Lei Guan
- School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China
| | - Chen Wang
- School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China
| | - Xu-Xiang Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Liping Ma
- School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Technology Innovation Center for Land Spatial Eco-restoration in Metropolitan Area, Ministry of Natural Resources, Shanghai 200062, PR China.
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14
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Hosokawa M, Nishikawa Y. Tools for microbial single-cell genomics for obtaining uncultured microbial genomes. Biophys Rev 2024; 16:69-77. [PMID: 38495448 PMCID: PMC10937852 DOI: 10.1007/s12551-023-01124-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 08/23/2023] [Indexed: 03/19/2024] Open
Abstract
The advent of next-generation sequencing technologies has facilitated the acquisition of large amounts of DNA sequence data at a relatively low cost, leading to numerous breakthroughs in decoding microbial genomes. Among the various genome sequencing activities, metagenomic analysis, which entails the direct analysis of uncultured microbial DNA, has had a profound impact on microbiome research and has emerged as an indispensable technology in this field. Despite its valuable contributions, metagenomic analysis is a "bulk analysis" technique that analyzes samples containing a wide diversity of microbes, such as bacteria, yielding information that is averaged across the entire microbial population. In order to gain a deeper understanding of the heterogeneous nature of the microbial world, there is a growing need for single-cell analysis, similar to its use in human cell biology. With this paradigm shift in mind, comprehensive single-cell genomics technology has become a much-anticipated innovation that is now poised to revolutionize microbiome research. It has the potential to enable the discovery of differences at the strain level and to facilitate a more comprehensive examination of microbial ecosystems. In this review, we summarize the current state-of-the-art in microbial single-cell genomics, highlighting the potential impact of this technology on our understanding of the microbial world. The successful implementation of this technology is expected to have a profound impact in the field, leading to new discoveries and insights into the diversity and evolution of microbes.
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Affiliation(s)
- Masahito Hosokawa
- Department of Life Science and Medical Bioscience, Waseda University, 2-2 Wakamatsu-Cho, Shinjuku-Ku, Tokyo, 162-8480 Japan
- Computational Bio Big-Data Open Innovation Laboratory, National Institute of Advanced Industrial Science and Technology, 3-4-1 Okubo, Shinjuku-Ku, Tokyo, 169-8555 Japan
- Research Organization for Nano and Life Innovation, Waseda University, 513 Wasedatsurumaki-Cho, Shinjuku-Ku, Tokyo, 162-0041 Japan
- Institute for Advanced Research of Biosystem Dynamics, Waseda Research Institute for Science and Engineering, 3-4-1 Okubo, Shinjuku-Ku, Tokyo, 169-8555 Japan
- bitBiome, Inc., 513 Wasedatsurumaki-Cho, Shinjuku-Ku, Tokyo, 162-0041 Japan
| | - Yohei Nishikawa
- Computational Bio Big-Data Open Innovation Laboratory, National Institute of Advanced Industrial Science and Technology, 3-4-1 Okubo, Shinjuku-Ku, Tokyo, 169-8555 Japan
- Research Organization for Nano and Life Innovation, Waseda University, 513 Wasedatsurumaki-Cho, Shinjuku-Ku, Tokyo, 162-0041 Japan
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15
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Benoit G, Raguideau S, James R, Phillippy AM, Chikhi R, Quince C. High-quality metagenome assembly from long accurate reads with metaMDBG. Nat Biotechnol 2024:10.1038/s41587-023-01983-6. [PMID: 38168989 DOI: 10.1038/s41587-023-01983-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 09/08/2023] [Indexed: 01/05/2024]
Abstract
We introduce metaMDBG, a metagenomics assembler for PacBio HiFi reads. MetaMDBG combines a de Bruijn graph assembly in a minimizer space with an iterative assembly over sequences of minimizers to address variations in genome coverage depth and an abundance-based filtering strategy to simplify strain complexity. For complex communities, we obtained up to twice as many high-quality circularized prokaryotic metagenome-assembled genomes as existing methods and had better recovery of viruses and plasmids.
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Affiliation(s)
- Gaëtan Benoit
- Organisms and Ecosystems, Earlham Institute, Norwich, UK
| | | | - Robert James
- Gut Microbes and Health, Quadram Institute, Norwich, UK
| | - Adam M Phillippy
- Genome Informatics Section, National Human Genome Research Institute, Bethesda, MD, USA
| | - Rayan Chikhi
- Sequence Bioinformatics, Department of Computational Biology, Institut Pasteur, Paris, France
| | - Christopher Quince
- Organisms and Ecosystems, Earlham Institute, Norwich, UK.
- Gut Microbes and Health, Quadram Institute, Norwich, UK.
- School of Biological Sciences, University of East Anglia, Norwich, UK.
- Warwick Medical School, University of Warwick, Coventry, UK.
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16
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Ratinskaia L, Malavin S, Zvi-Kedem T, Vintila S, Kleiner M, Rubin-Blum M. Metabolically-versatile Ca. Thiodiazotropha symbionts of the deep-sea lucinid clam Lucinoma kazani have the genetic potential to fix nitrogen. ISME COMMUNICATIONS 2024; 4:ycae076. [PMID: 38873029 PMCID: PMC11171427 DOI: 10.1093/ismeco/ycae076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 05/06/2024] [Accepted: 05/31/2024] [Indexed: 06/15/2024]
Abstract
Lucinid clams are one of the most diverse and widespread symbiont-bearing animal groups in both shallow and deep-sea chemosynthetic habitats. Lucinids harbor Ca. Thiodiazotropha symbionts that can oxidize inorganic and organic substrates such as hydrogen sulfide and formate to gain energy. The interplay between these key metabolic functions, nutrient uptake and biotic interactions in Ca. Thiodiazotropha is not fully understood. We collected Lucinoma kazani individuals from next to a deep-sea brine pool in the eastern Mediterranean Sea, at a depth of 1150 m and used Oxford Nanopore and Illumina sequencing to obtain high-quality genomes of their Ca. Thiodiazotropha gloverae symbiont. The genomes served as the basis for transcriptomic and proteomic analyses to characterize the in situ gene expression, metabolism and physiology of the symbionts. We found genes needed for N2 fixation in the deep-sea symbiont's genome, which, to date, were only found in shallow-water Ca. Thiodiazotropha. However, we did not detect the expression of these genes and thus the potential role of nitrogen fixation in this symbiosis remains to be determined. We also found the high expression of carbon fixation and sulfur oxidation genes, which indicate chemolithoautotrophy as the key physiology of Ca. Thiodiazotropha. However, we also detected the expression of pathways for using methanol and formate as energy sources. Our findings highlight the key traits these microbes maintain to support the nutrition of their hosts and interact with them.
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Affiliation(s)
- Lina Ratinskaia
- Biology Department, National Institute of Oceanography, Israel Oceanographic and Limnological Research (IOLR), Haifa 3108000Israel
- Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of Haifa, Haifa 3498838Israel
| | - Stas Malavin
- Biology Department, National Institute of Oceanography, Israel Oceanographic and Limnological Research (IOLR), Haifa 3108000Israel
- Department of Environmental Hydrology and Microbiology, Zuckerberg Institute for Water Research, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sde Boker 8499000, Israel
| | - Tal Zvi-Kedem
- Biology Department, National Institute of Oceanography, Israel Oceanographic and Limnological Research (IOLR), Haifa 3108000Israel
- Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of Haifa, Haifa 3498838Israel
| | - Simina Vintila
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, 27695, United States
| | - Manuel Kleiner
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, 27695, United States
| | - Maxim Rubin-Blum
- Biology Department, National Institute of Oceanography, Israel Oceanographic and Limnological Research (IOLR), Haifa 3108000Israel
- Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of Haifa, Haifa 3498838Israel
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17
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Męcik M, Buta-Hubeny M, Paukszto Ł, Maździarz M, Wolak I, Harnisz M, Korzeniewska E. Poultry manure-derived microorganisms as a reservoir and source of antibiotic resistance genes transferred to soil autochthonous microorganisms. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 348:119303. [PMID: 37832303 DOI: 10.1016/j.jenvman.2023.119303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 10/05/2023] [Accepted: 10/09/2023] [Indexed: 10/15/2023]
Abstract
Animal husbandry is increasing yearly due to the growing demand for meat and livestock products, among other reasons. To meet these demands, prophylactic antibiotics are used in the livestock industry (i.e., poultry farming) to promote health and stimulate animal growth. However, antibiotics are not fully metabolized by animals, and they are evacuated to the environment with excreta. Animal manure is used as fertilizer to reduce the volume of waste generated in the livestock sector. However, manure often contains microorganisms harboring antibiotic resistance genes (ARGs). Then, the microbiome of manure applicate to the soil may contribute to the spread of antibiotic resistance in the environment, including autochthonous soil-dwelling microorganisms. The present study was conducted during the crops growing season in Poland (May to September 2019) to determine the influence of poultry manure as well as poultry manure supplemented with selected antibiotics on the diversity of the soil microbiome in treatments that had not been previously fertilized with manure and the ability of antibiotic-resistant bacteria to transfer ARGs to other soil bacteria. Antibiotic concentrations were elevated at the beginning of the study and decreased over time. Poultry manure induced significant changes in the structure of microbial communities in soil; the diversity of the soil microbiome decreased, and the abundance of bacterial genera Bradyrhizobium, Streptomyces, and Pseudomonas, which are characteristic of the analyzed manure, increased. Over time, soil microbial diversity was restored to the state observed before the application of manure. Genes conferring resistance to multiple drugs as well as genes encoding resistance to bacitracin and aminoglycosides were the most frequently identified ARGs in the analyzed bacteria, including on mobile genetic elements. Multidrug resistance was observed in 17 bacterial taxa, whereas ARGs were identified in 32 bacterial taxa identified in the soil microbiome. The results of the study conclude that the application of poultry manure supplemented with antibiotics initially affects soil microbiome and resistome diversity but finally, the soil shows resilience and returns to its original state after time, with most antibiotic resistance genes disappearing. This phenomenon is of great importance in sustainable soil health after manure application.
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Affiliation(s)
- Magdalena Męcik
- Department of Water Protection Engineering and Environmental Microbiology, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Prawocheńskiego 1, 10-720, Olsztyn, Poland
| | - Martyna Buta-Hubeny
- Department of Water Protection Engineering and Environmental Microbiology, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Prawocheńskiego 1, 10-720, Olsztyn, Poland
| | - Łukasz Paukszto
- Department of Botany and Nature Protection, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, Plac Łódzki 1, 10-721, Olsztyn, Poland
| | - Mateusz Maździarz
- Department of Botany and Nature Protection, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, Plac Łódzki 1, 10-721, Olsztyn, Poland
| | - Izabela Wolak
- Department of Water Protection Engineering and Environmental Microbiology, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Prawocheńskiego 1, 10-720, Olsztyn, Poland
| | - Monika Harnisz
- Department of Water Protection Engineering and Environmental Microbiology, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Prawocheńskiego 1, 10-720, Olsztyn, Poland
| | - Ewa Korzeniewska
- Department of Water Protection Engineering and Environmental Microbiology, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Prawocheńskiego 1, 10-720, Olsztyn, Poland.
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18
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Simon SA, Schmidt K, Griesdorn L, Soares AR, Bornemann TLV, Probst AJ. Dancing the Nanopore limbo - Nanopore metagenomics from small DNA quantities for bacterial genome reconstruction. BMC Genomics 2023; 24:727. [PMID: 38041056 PMCID: PMC10693096 DOI: 10.1186/s12864-023-09853-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 11/28/2023] [Indexed: 12/03/2023] Open
Abstract
BACKGROUND While genome-resolved metagenomics has revolutionized our understanding of microbial and genetic diversity in environmental samples, assemblies of short-reads often result in incomplete and/or highly fragmented metagenome-assembled genomes (MAGs), hampering in-depth genomics. Although Nanopore sequencing has increasingly been used in microbial metagenomics as long reads greatly improve the assembly quality of MAGs, the recommended DNA quantity usually exceeds the recoverable amount of DNA of environmental samples. Here, we evaluated lower-than-recommended DNA quantities for Nanopore library preparation by determining sequencing quality, community composition, assembly quality and recovery of MAGs. RESULTS We generated 27 Nanopore metagenomes using the commercially available ZYMO mock community and varied the amount of input DNA from 1000 ng (the recommended minimum) down to 1 ng in eight steps. The quality of the generated reads remained stable across all input levels. The read mapping accuracy, which reflects how well the reads match a known reference genome, was consistently high across all libraries. The relative abundance of the species in the metagenomes was stable down to input levels of 50 ng. High-quality MAGs (> 95% completeness, ≤ 5% contamination) could be recovered from metagenomes down to 35 ng of input material. When combined with publicly available Illumina reads for the mock community, Nanopore reads from input quantities as low as 1 ng improved the quality of hybrid assemblies. CONCLUSION Our results show that the recommended DNA amount for Nanopore library preparation can be substantially reduced without any adverse effects to genome recovery and still bolster hybrid assemblies when combined with short-read data. We posit that the results presented herein will enable studies to improve genome recovery from low-biomass environments, enhancing microbiome understanding.
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Affiliation(s)
- Sophie A Simon
- Environmental Metagenomics, Faculty of Chemistry, Research Center One Health Ruhr of the University Alliance Ruhr, University of Duisburg-Essen, Essen, Germany.
| | - Katharina Schmidt
- Environmental Metagenomics, Faculty of Chemistry, Research Center One Health Ruhr of the University Alliance Ruhr, University of Duisburg-Essen, Essen, Germany
| | - Lea Griesdorn
- Environmental Metagenomics, Faculty of Chemistry, Research Center One Health Ruhr of the University Alliance Ruhr, University of Duisburg-Essen, Essen, Germany
| | - André R Soares
- Environmental Metagenomics, Faculty of Chemistry, Research Center One Health Ruhr of the University Alliance Ruhr, University of Duisburg-Essen, Essen, Germany
- Centre of Water and Environmental Research (ZWU), University of Duisburg-Essen, Essen, Germany
| | - Till L V Bornemann
- Environmental Metagenomics, Faculty of Chemistry, Research Center One Health Ruhr of the University Alliance Ruhr, University of Duisburg-Essen, Essen, Germany
- Centre of Water and Environmental Research (ZWU), University of Duisburg-Essen, Essen, Germany
| | - Alexander J Probst
- Environmental Metagenomics, Faculty of Chemistry, Research Center One Health Ruhr of the University Alliance Ruhr, University of Duisburg-Essen, Essen, Germany.
- Centre of Water and Environmental Research (ZWU), University of Duisburg-Essen, Essen, Germany.
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Fu S, Zhang Y, Wang R, Qiu Z, Song W, Yang Q, Shen L. A novel culture-enriched metagenomic sequencing strategy effectively guarantee the microbial safety of drinking water by uncovering the low abundance pathogens. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 345:118737. [PMID: 37657296 DOI: 10.1016/j.jenvman.2023.118737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 07/21/2023] [Accepted: 07/31/2023] [Indexed: 09/03/2023]
Abstract
Assessing the presence of waterborne pathogens and antibiotic resistance genes (ARGs) is crucial for managing the environmental quality of drinking water sources. However, detecting low abundance pathogens in such settings is challenging. In this study, a workflow was developed to enrich for broad spectrum pathogens from drinking water samples. A mock community was used to evaluate the effectiveness of various enrichment broths in detecting low-abundance pathogens. Monthly metagenomic surveillance was conducted in a drinking water source from May to September 2021, and water samples were subjected to five enrichment procedures for 6 h to recover the majority of waterborne bacterial pathogens. Oxford Nanopore Technology (ONT) was used for metagenomic sequencing of enriched samples to obtain high-quality pathogen genomes. The results showed that selective enrichment significantly increased the proportions of targeted bacterial pathogens. Compared to direct metagenomic sequencing of untreated water samples, targeted enrichment followed by ONT sequencing significantly improved the detection of waterborne pathogens and the quality of metagenome-assembled genomes (MAGs). Eighty-six high-quality MAGs, including 70 pathogen MAGs, were obtained from ONT sequencing, while only 12 MAGs representing 10 species were obtained from direct metagenomic sequencing of untreated water samples. In addition, ONT sequencing improved the recovery of mobile genetic elements and the accuracy of phylogenetic analysis. This study highlights the urgent need for efficient methodologies to detect and manage microbial risks in drinking water sources. The developed workflow provides a cost-effective approach for environmental management of drinking water sources with microbial risks. The study also uncovered pathogens that were not detected by traditional methods, thereby advancing microbial risk management of drinking water sources.
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Affiliation(s)
- Songzhe Fu
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Northwest University, Xi'an, 710069, China; Key Laboratory of Environment Controlled Aquaculture (Dalian Ocean University), Ministry of Education, 116023, China.
| | - Yixiang Zhang
- CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences. Shanghai, China; University of Chinese Academy of Sciences, Shanghai, China
| | - Rui Wang
- Key Laboratory of Environment Controlled Aquaculture (Dalian Ocean University), Ministry of Education, 116023, China
| | - Zhiguang Qiu
- School of Environment and Energy, Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Weizhi Song
- School of Life Sciences and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, SAR, Hong Kong, China
| | - Qian Yang
- Center for Microbial Ecology and Technology, Ghent University, Ghent, Belgium
| | - Lixin Shen
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Northwest University, Xi'an, 710069, China.
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20
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Vigil K, Aw TG. Comparison of de novo assembly using long-read shotgun metagenomic sequencing of viruses in fecal and serum samples from marine mammals. Front Microbiol 2023; 14:1248323. [PMID: 37808316 PMCID: PMC10556685 DOI: 10.3389/fmicb.2023.1248323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 09/04/2023] [Indexed: 10/10/2023] Open
Abstract
Introduction Viral diseases of marine mammals are difficult to study, and this has led to a limited knowledge on emerging known and unknown viruses which are ongoing threats to animal health. Viruses are the leading cause of infectious disease-induced mass mortality events among marine mammals. Methods In this study, we performed viral metagenomics in stool and serum samples from California sea lions (Zalophus californianus) and bottlenose dolphins (Tursiops truncates) using long-read nanopore sequencing. Two widely used long-read de novo assemblers, Canu and Metaflye, were evaluated to assemble viral metagenomic sequencing reads from marine mammals. Results Both Metaflye and Canu assembled similar viral contigs of vertebrates, such as Parvoviridae, and Poxviridae. Metaflye assembled viral contigs that aligned with one viral family that was not reproduced by Canu, while Canu assembled viral contigs that aligned with seven viral families that was not reproduced by Metaflye. Only Canu assembled viral contigs from dolphin and sea lion fecal samples that matched both protein and nucleotide RefSeq viral databases using BLASTx and BLASTn for Anelloviridae, Parvoviridae and Circoviridae families. Viral contigs assembled with Canu aligned with torque teno viruses and anelloviruses from vertebrate hosts. Viruses associated with invertebrate hosts including densoviruses, Ambidensovirus, and various Circoviridae isolates were also aligned. Some of the invertebrate and vertebrate viruses reported here are known to potentially cause mortality events and/or disease in different seals, sea stars, fish, and bivalve species. Discussion Canu performed better by producing the most viral contigs as compared to Metaflye with assemblies aligning to both protein and nucleotide databases. This study suggests that marine mammals can be used as important sentinels to surveil marine viruses that can potentially cause diseases in vertebrate and invertebrate hosts.
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Affiliation(s)
| | - Tiong Gim Aw
- Department of Environmental Health Sciences, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA, United States
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21
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Arikawa K, Hosokawa M. Uncultured prokaryotic genomes in the spotlight: An examination of publicly available data from metagenomics and single-cell genomics. Comput Struct Biotechnol J 2023; 21:4508-4518. [PMID: 37771751 PMCID: PMC10523443 DOI: 10.1016/j.csbj.2023.09.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 09/10/2023] [Accepted: 09/10/2023] [Indexed: 09/30/2023] Open
Abstract
Owing to the ineffectiveness of traditional culture techniques for the vast majority of microbial species, culture-independent analyses utilizing next-generation sequencing and bioinformatics have become essential for gaining insight into microbial ecology and function. This mini-review focuses on two essential methods for obtaining genetic information from uncultured prokaryotes, metagenomics and single-cell genomics. We analyzed the registration status of uncultured prokaryotic genome data from major public databases and assessed the advantages and limitations of both the methods. Metagenomics generates a significant quantity of sequence data and multiple prokaryotic genomes using straightforward experimental procedures. However, in ecosystems with high microbial diversity, such as soil, most genes are presented as brief, disconnected contigs, and lack association of highly conserved genes and mobile genetic elements with individual species genomes. Although technically more challenging, single-cell genomics offers valuable insights into complex ecosystems by providing strain-resolved genomes, addressing issues in metagenomics. Recent technological advancements, such as long-read sequencing, machine learning algorithms, and in silico protein structure prediction, in combination with vast genomic data, have the potential to overcome the current technical challenges and facilitate a deeper understanding of uncultured microbial ecosystems and microbial dark matter genes and proteins. In light of this, it is imperative that continued innovation in both methods and technologies take place to create high-quality reference genome databases that will support future microbial research and industrial applications.
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Affiliation(s)
- Koji Arikawa
- Department of Life Science and Medical Bioscience, Waseda University, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan
- bitBiome, Inc., 513 Wasedatsurumaki-cho, Shinjuku-ku, Tokyo 162-0041, Japan
| | - Masahito Hosokawa
- Department of Life Science and Medical Bioscience, Waseda University, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan
- bitBiome, Inc., 513 Wasedatsurumaki-cho, Shinjuku-ku, Tokyo 162-0041, Japan
- Research Organization for Nano and Life Innovation, Waseda University, 513 Wasedatsurumaki-cho, Shinjuku-ku, Tokyo 162-0041, Japan
- Institute for Advanced Research of Biosystem Dynamics, Waseda Research Institute for Science and Engineering, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
- Computational Bio Big-Data Open Innovation Laboratory, National Institute of Advanced Industrial Science and Technology, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
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22
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Baker JL. Illuminating the oral microbiome and its host interactions: recent advancements in omics and bioinformatics technologies in the context of oral microbiome research. FEMS Microbiol Rev 2023; 47:fuad051. [PMID: 37667515 PMCID: PMC10503653 DOI: 10.1093/femsre/fuad051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 08/02/2023] [Accepted: 09/01/2023] [Indexed: 09/06/2023] Open
Abstract
The oral microbiota has an enormous impact on human health, with oral dysbiosis now linked to many oral and systemic diseases. Recent advancements in sequencing, mass spectrometry, bioinformatics, computational biology, and machine learning are revolutionizing oral microbiome research, enabling analysis at an unprecedented scale and level of resolution using omics approaches. This review contains a comprehensive perspective of the current state-of-the-art tools available to perform genomics, metagenomics, phylogenomics, pangenomics, transcriptomics, proteomics, metabolomics, lipidomics, and multi-omics analysis on (all) microbiomes, and then provides examples of how the techniques have been applied to research of the oral microbiome, specifically. Key findings of these studies and remaining challenges for the field are highlighted. Although the methods discussed here are placed in the context of their contributions to oral microbiome research specifically, they are pertinent to the study of any microbiome, and the intended audience of this includes researchers would simply like to get an introduction to microbial omics and/or an update on the latest omics methods. Continued research of the oral microbiota using omics approaches is crucial and will lead to dramatic improvements in human health, longevity, and quality of life.
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Affiliation(s)
- Jonathon L Baker
- Department of Oral Rehabilitation & Biosciences, School of Dentistry, Oregon Health & Science University, 3181 Sam Jackson Park Road, Portland, OR 97202, United States
- Genomic Medicine Group, J. Craig Venter Institute, La Jolla, CA 92037, United States
- Department of Pediatrics, UC San Diego School of Medicine, La Jolla, CA 92093, United States
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23
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Muralitharan RR, Snelson M, Meric G, Coughlan MT, Marques FZ. Guidelines for microbiome studies in renal physiology. Am J Physiol Renal Physiol 2023; 325:F345-F362. [PMID: 37440367 DOI: 10.1152/ajprenal.00072.2023] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 06/28/2023] [Accepted: 07/07/2023] [Indexed: 07/15/2023] Open
Abstract
Gut microbiome research has increased dramatically in the last decade, including in renal health and disease. The field is moving from experiments showing mere association to causation using both forward and reverse microbiome approaches, leveraging tools such as germ-free animals, treatment with antibiotics, and fecal microbiota transplantations. However, we are still seeing a gap between discovery and translation that needs to be addressed, so that patients can benefit from microbiome-based therapies. In this guideline paper, we discuss the key considerations that affect the gut microbiome of animals and clinical studies assessing renal function, many of which are often overlooked, resulting in false-positive results. For animal studies, these include suppliers, acclimatization, baseline microbiota and its normalization, littermates and cohort/cage effects, diet, sex differences, age, circadian differences, antibiotics and sweeteners, and models used. Clinical studies have some unique considerations, which include sampling, gut transit time, dietary records, medication, and renal phenotypes. We provide best-practice guidance on sampling, storage, DNA extraction, and methods for microbial DNA sequencing (both 16S rRNA and shotgun metagenome). Finally, we discuss follow-up analyses, including tools available, metrics, and their interpretation, and the key challenges ahead in the microbiome field. By standardizing study designs, methods, and reporting, we will accelerate the findings from discovery to translation and result in new microbiome-based therapies that may improve renal health.
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Affiliation(s)
- Rikeish R Muralitharan
- Hypertension Research Laboratory, School of Biological Sciences, Faculty of Science, Monash University, Melbourne, Victoria, Australia
- Institute for Medical Research, Ministry of Health Malaysia, Kuala Lumpur, Malaysia
| | - Matthew Snelson
- Department of Diabetes, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Guillaume Meric
- Cambridge-Baker Systems Genomics Initiative, Baker Heart & Diabetes Institute, Melbourne, Victoria, Australia
- Department of Cardiometabolic Health, University of Melbourne, Melbourne, Victoria, Australia
- Department of Medical Sciences, Molecular Epidemiology and Science for Life Laboratory, Uppsala University, Uppsala, Sweden
- Department of Cardiovascular Research Translation and Implementation, La Trobe University, Melbourne, Victoria, Australia
| | - Melinda T Coughlan
- Department of Diabetes, Central Clinical School, Monash University, Melbourne, Victoria, Australia
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Parkville, Victoria, Australia
| | - Francine Z Marques
- Hypertension Research Laboratory, School of Biological Sciences, Faculty of Science, Monash University, Melbourne, Victoria, Australia
- Heart Failure Research Group, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
- Victorian Heart Institute, Monash University, Melbourne, Victoria, Australia
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24
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Pan J, Zhang X, Xu W, Liu Y, Liu L, Luo Z, Li M. Wood-Ljungdahl pathway found in novel marine Korarchaeota groups illuminates their evolutionary history. mSystems 2023; 8:e0030523. [PMID: 37458475 PMCID: PMC10469681 DOI: 10.1128/msystems.00305-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 05/29/2023] [Indexed: 07/22/2023] Open
Abstract
Korarchaeota, due to its rarity in common environments, is one of the archaeal phyla that has received the least attention from researchers. It was previously thought to consist solely of strict thermophiles. However, our study provides genetic evidence for the presence of korarchaeal members in temperate subsurface seawater. Furthermore, a systematic reclassification of the Korarchaeota based on 16S rRNA genes and genomes has revealed three novel marine groups (Kor-6 to Kor-8) at the root of the Korarchaeota branch. Kor-6 contains microbes that are present in moderate temperatures. All three novel marine phyla possess genes for the Wood-Ljungdahl pathway, and Kor-7 and Kor-8 possess fewer genes encoding oxygen resistance traits than other korarchaeal groups, suggesting a distinct lifestyle for these novel phyla. Our results, together with estimations of Korarchaeota divergence times, suggest that oxygen availability may be one of the important factors that have influenced the evolution of Korarchaeota. IMPORTANCE Korarchaeota were previously thought to inhabit exclusively high-temperature environments. However, our study provides genetic evidence for their unexpected presence in temperate marine waters. Through analysis of publicly available korarchaeal reference data, we have systematically reclassified Korarchaeota and identified the existence of three previously unknown marine groups (Kor-6, Kor-7, and Kor-8) at the root of the Korarchaeota branch. Comparative analysis of their gene content revealed that these novel groups exhibit a lifestyle distinct from other Korarchaeota. Specifically, they have the ability to fix carbon exclusively via the Wood-Ljungdahl (WL) pathway, and the genomes within Kor-7 and Kor-8 contain few genes encoding antioxidant enzymes, indicating their strictly anaerobic lifestyle. Further studies suggest that the genes related to methane metabolism and the WL pathway may have been inherited from a common ancestor of the Korarchaeota and that oxygen availability may be one of the important evolutionary factors that shaped the diversification of this archaeal phylum.
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Affiliation(s)
- Jie Pan
- Archaeal Biology Center, Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong, China
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong, China
- Shenzhen Xbiome Biotech Co. Ltd., Shenzhen, Guangdong, China
| | - Xinxu Zhang
- Archaeal Biology Center, Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong, China
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong, China
| | - Wei Xu
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, Fujian, China
| | - Yang Liu
- Archaeal Biology Center, Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong, China
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong, China
| | - Lirui Liu
- Archaeal Biology Center, Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong, China
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong, China
| | - Zhuhua Luo
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, Fujian, China
| | - Meng Li
- Archaeal Biology Center, Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong, China
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong, China
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Yanagi I, Akahori R, Takeda KI. Dwell Time Prolongation and Identification of Single Nucleotides Passing through a Solid-State Nanopore by Using Ammonium Sulfate Aqueous Solution. ACS OMEGA 2023; 8:21285-21292. [PMID: 37332803 PMCID: PMC10268630 DOI: 10.1021/acsomega.3c02703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 05/22/2023] [Indexed: 06/20/2023]
Abstract
The ionic current blockades when poly(dT)60 or dNTPs passed through SiN nanopores in an aqueous solution containing (NH4)2SO4 were investigated. The dwell time of poly(dT)60 in the nanopores in an aqueous solution containing (NH4)2SO4 was significantly longer compared to that in an aqueous solution that did not contain (NH4)2SO4. This dwell time prolongation effect due to the aqueous solution containing (NH4)2SO4 was also confirmed when dCTP passed through the nanopores. In addition, when the nanopores were fabricated via dielectric breakdown in the aqueous solution containing (NH4)2SO4, the dwell time prolongation effect for dCTP still occurred even after the aqueous solution was displaced with the aqueous solution without (NH4)2SO4. Furthermore, we measured the ionic current blockades when the four types of dNTPs passed through the same nanopore, and the four types of dNTPs could be statistically identified according to their current blockade values.
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Affiliation(s)
- Itaru Yanagi
- Center
for Exploratory Research, Research & Development Group, Hitachi, Ltd., 1-280, Higashi-koigakubo, Kokubunji, Tokyo 185-8603, Japan
| | - Rena Akahori
- Center
for Technology Innovation - Healthcare, Research & Development
Group, Hitachi, Ltd., 1-280, Higashi-koigakubo, Kokubunji, Tokyo 185-8603, Japan
| | - Ken-ichi Takeda
- Center
for Technology Innovation - Healthcare, Research & Development
Group, Hitachi, Ltd., 1-280, Higashi-koigakubo, Kokubunji, Tokyo 185-8603, Japan
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26
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Wong J, Coombe L, Nikolić V, Zhang E, Nip KM, Sidhu P, Warren RL, Birol I. Linear time complexity de novo long read genome assembly with GoldRush. Nat Commun 2023; 14:2906. [PMID: 37217507 DOI: 10.1038/s41467-023-38716-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 05/11/2023] [Indexed: 05/24/2023] Open
Abstract
Current state-of-the-art de novo long read genome assemblers follow the Overlap-Layout-Consensus paradigm. While read-to-read overlap - its most costly step - was improved in modern long read genome assemblers, these tools still often require excessive RAM when assembling a typical human dataset. Our work departs from this paradigm, foregoing all-vs-all sequence alignments in favor of a dynamic data structure implemented in GoldRush, a de novo long read genome assembly algorithm with linear time complexity. We tested GoldRush on Oxford Nanopore Technologies long sequencing read datasets with different base error profiles sourced from three human cell lines, rice, and tomato. Here, we show that GoldRush achieves assembly scaffold NGA50 lengths of 18.3-22.2, 0.3 and 2.6 Mbp, for the genomes of human, rice, and tomato, respectively, and assembles each genome within a day, using at most 54.5 GB of random-access memory, demonstrating the scalability of our genome assembly paradigm and its implementation.
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Affiliation(s)
- Johnathan Wong
- Canada's Michael Smith Genome Sciences Centre, BC Cancer, Vancouver, BC, V5Z 4S6, Canada.
| | - Lauren Coombe
- Canada's Michael Smith Genome Sciences Centre, BC Cancer, Vancouver, BC, V5Z 4S6, Canada
| | - Vladimir Nikolić
- Canada's Michael Smith Genome Sciences Centre, BC Cancer, Vancouver, BC, V5Z 4S6, Canada
| | - Emily Zhang
- Canada's Michael Smith Genome Sciences Centre, BC Cancer, Vancouver, BC, V5Z 4S6, Canada
| | - Ka Ming Nip
- Canada's Michael Smith Genome Sciences Centre, BC Cancer, Vancouver, BC, V5Z 4S6, Canada
| | - Puneet Sidhu
- Canada's Michael Smith Genome Sciences Centre, BC Cancer, Vancouver, BC, V5Z 4S6, Canada
| | - René L Warren
- Canada's Michael Smith Genome Sciences Centre, BC Cancer, Vancouver, BC, V5Z 4S6, Canada
| | - Inanç Birol
- Canada's Michael Smith Genome Sciences Centre, BC Cancer, Vancouver, BC, V5Z 4S6, Canada.
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Hesketh-Best PJ, Bosco-Santos A, Garcia SL, O’Beirne MD, Werne JP, Gilhooly WP, Silveira CB. Viruses of sulfur oxidizing phototrophs encode genes for pigment, carbon, and sulfur metabolisms. COMMUNICATIONS EARTH & ENVIRONMENT 2023; 4:126. [PMID: 38665202 PMCID: PMC11041744 DOI: 10.1038/s43247-023-00796-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 04/05/2023] [Indexed: 04/28/2024]
Abstract
Viral infections modulate bacterial metabolism and ecology. Here, we investigated the hypothesis that viruses influence the ecology of purple and green sulfur bacteria in anoxic and sulfidic lakes, analogs of euxinic oceans in the geologic past. By screening metagenomes from lake sediments and water column, in addition to publicly-available genomes of cultured purple and green sulfur bacteria, we identified almost 300 high and medium-quality viral genomes. Viruses carrying the gene psbA, encoding the small subunit of photosystem II protein D1, were ubiquitous, suggesting viral interference with the light reactions of sulfur oxidizing autotrophs. Viruses predicted to infect these autotrophs also encoded auxiliary metabolic genes for reductive sulfur assimilation as cysteine, pigment production, and carbon fixation. These observations show that viruses have the genomic potential to modulate the production of metabolic markers of phototrophic sulfur bacteria that are used to identify photic zone euxinia in the geologic past.
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Affiliation(s)
| | - Alice Bosco-Santos
- Institute of Earth Surface Dynamics, University of Lausanne, Lausanne, Switzerland
| | - Sofia L. Garcia
- Department of Biology, University of Miami, Coral Gables, FL USA
| | - Molly D. O’Beirne
- Department of Geology & Environmental Science, University of Pittsburgh, Pittsburgh, PA USA
| | - Josef P. Werne
- Department of Geology & Environmental Science, University of Pittsburgh, Pittsburgh, PA USA
| | - William P. Gilhooly
- Department of Earth Sciences, Indiana University-Purdue University Indianapolis, Indianapolis, IN USA
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Chapman R, Jones L, D'Angelo A, Suliman A, Anwar M, Bagby S. Nanopore-Based Metagenomic Sequencing in Respiratory Tract Infection: A Developing Diagnostic Platform. Lung 2023; 201:171-179. [PMID: 37009923 PMCID: PMC10067523 DOI: 10.1007/s00408-023-00612-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 03/14/2023] [Indexed: 04/04/2023]
Abstract
Respiratory tract infection (RTI) remains a significant cause of morbidity and mortality across the globe. The optimal management of RTI relies upon timely pathogen identification via evaluation of respiratory samples, a process which utilises traditional culture-based methods to identify offending microorganisms. This process can be slow and often prolongs the use of broad-spectrum antimicrobial therapy, whilst also delaying the introduction of targeted therapy as a result. Nanopore sequencing (NPS) of respiratory samples has recently emerged as a potential diagnostic tool in RTI. NPS can identify pathogens and antimicrobial resistance profiles with greater speed and efficiency than traditional sputum culture-based methods. Increased speed to pathogen identification can improve antimicrobial stewardship by reducing the use of broad-spectrum antibiotic therapy, as well as improving overall clinical outcomes. This new technology is becoming more affordable and accessible, with some NPS platforms requiring minimal sample preparation and laboratory infrastructure. However, questions regarding clinical utility and how best to implement NPS technology within RTI diagnostic pathways remain unanswered. In this review, we introduce NPS as a technology and as a diagnostic tool in RTI in various settings, before discussing the advantages and limitations of NPS, and finally what the future might hold for NPS platforms in RTI diagnostics.
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Affiliation(s)
- Robert Chapman
- Princess Alexandra Hospital, Hamstel Road, Harlow, CM20 1QX, UK.
| | - Luke Jones
- Department of Life Sciences, University of Bath, Bath, BA2 7AY, UK
| | - Alberto D'Angelo
- Department of Life Sciences, University of Bath, Bath, BA2 7AY, UK
| | - Ahmed Suliman
- Princess Alexandra Hospital, Hamstel Road, Harlow, CM20 1QX, UK
| | - Muhammad Anwar
- Princess Alexandra Hospital, Hamstel Road, Harlow, CM20 1QX, UK
| | - Stefan Bagby
- Department of Life Sciences, University of Bath, Bath, BA2 7AY, UK
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