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High throughput ANI analysis of 90K prokaryotic genomes reveals clear species boundaries
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Abstract
A fundamental question in microbiology is whether there is continuum of genetic diversity among genomes, or clear species boundaries prevail instead. Whole-genome similarity metrics such as Average Nucleotide Identity (ANI) help address this question by facilitating high resolution taxonomic analysis of thousands of genomes from diverse phylogenetic lineages. To scale to available genomes and beyond, we present FastANI, a new method to estimate ANI using alignment-free approximate sequence mapping. FastANI is accurate for both finished and draft genomes, and is up to three orders of magnitude faster compared to alignment-based approaches. We leverage FastANI to compute pairwise ANI values among all prokaryotic genomes available in the NCBI database. Our results reveal clear genetic discontinuity, with 99.8% of the total 8 billion genome pairs analyzed conforming to >95% intra-species and <83% inter-species ANI values. This discontinuity is manifested with or without the most frequently sequenced species, and is robust to historic additions in the genome databases.
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“FastANI (v1.3.1) (https://github.com/ParBLiSS/FastANI.) was used to calculate the average nucleotide identity between the isolated strains and the original Lp082,47 ensuring isolates were evolved from Lp082”
From Gut microbiota drives structural variation of exogenous probiotics to enhance colonization (2025) · cites this paper as [47]
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MethodBenchmarking short-read metagenomics tools for removing host contamination
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BackgroundGlobal Phylogeography of Marine Synechococcus in Coastal Areas Reveals Strong Community Shifts
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InfluentialPseudomonas Diversity Within Urban Freshwaters
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“Taken together, these results suggest that some revisions of the Thermosynechococcus taxonomy may be necessary based on the 95% ANI cutoff (Jain et al., 2018).”
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“nucleatum, an ANI analysis was performed using the FastANI software (58) with default parameters, and the results were visualized as a heatmap.”
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Merino, N., Kawai, M., Boyd, E. S., Colman, D. R., McGlynn, S. E., Nealson, K. H., Kurokawa, K., & Hongoh, Y. (2020) · Frontiers in Microbiology · doi:10.3389/fmicb.2020.01031 · Cited by 36
Olsen, A. B., Spilsberg, B., Nilsen, H., Lagesen, K., Gulla, S., Avendaño-Herrera, R. E., Irgang, R., Duchaud, É., & Colquhoun, D. J. (2020) · INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY · doi:10.1099/ijsem.0.004501 · Cited by 36
Volpiano, C. G., Sant’Anna, F. H., Ambrosini, A., José, J. F. B. D. S., Beneduzi, A., Whitman, W. B., de Souza, E. M., Lisboa, B. B., Vargas, L. K., & Passaglia, L. M. P. (2021) · Frontiers in Microbiology · doi:10.3389/fmicb.2021.614957 · Cited by 36
“…with OGRI values, new algorithms with optimized search parameters (Lee I. et al., 2016; Rodriguez-R and Konstantinidis, 2016) or to speeding up the search process (Richter and RossellóMóra, 2009; Varghese et al., 2015; Yoon et al., 2017b; Jain et al., 2018) are continuously being developed.”
MethodInfluentialPeng, Z., Dottorini, T., Hu, Y., Li, M., Yan, S., Fanning, S., Baker, M., Xu, J., & Li, F. (2021) · Frontiers in Microbiology · doi:10.3389/fmicb.2021.628538 · Cited by 37
“324 (Jain et al., 2018).”
BackgroundResultInfluentialRecent paradigm shifts in the perception of the role of Bacillus thuringiensis in foodborne disease
Biggel, M., Jeßberger, N., Kovač, J., & Johler, S. (2022) · Food Microbiology · doi:10.1016/j.fm.2022.104025 · Cited by 44
Seol, D., Lim, J. S., Sung, S., Lee, Y. H., Jeong, M., Cho, S., Kwak, W., & Kim, H. (2022) · Microbiology Spectrum · doi:10.1128/spectrum.02017-21 · Cited by 37
Mohite, O. S., Lloyd, C. J., Monk, J. M., Weber, T., & Palsson, B. Ø. (2022) · Synthetic and Systems Biotechnology · doi:10.1016/j.synbio.2022.04.011 · Cited by 35
Bessarab, I. N., Maszenan, A. M., Haryono, M., Arumugam, K., Saw, N. M. M. T., Seviour, R. J., & Williams, R. B. H. (2022) · Frontiers in Microbiology · doi:10.3389/fmicb.2022.834906 · Cited by 35
Wang, Y.-L., Zhang, Y.-L., Hu, Y., Liu, L., Liu, S.-J., & Zhang, T. (2023) · Microbiome · doi:10.1186/s40168-023-01494-1 · Cited by 32
Lugli, G. A., Mancabelli, L., Milani, C., Fontana, F., Tarracchini, C., Alessandri, G., van Sinderen, D., Turroni, F., & Ventura, M. (2023) · npj Biofilms and Microbiomes · doi:10.1038/s41522-023-00392-6 · Cited by 36
Young, J. P. W., Jorrín, B., Moeskjær, S., & James, E. K. (2023) · INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY · doi:10.1099/ijsem.0.005979 · Cited by 35
Genomic and transcriptomic insights into complex virus–prokaryote interactions in marine biofilms
Zhou, K., Wong, T. Y., Long, L., Anantharaman, K., Zhang, W., Wong, W. C., Zhang, R., & Qian, P. (2023) · The ISME Journal · doi:10.1038/s41396-023-01546-2 · Cited by 35
“FastANI v.1.33 was employed to calculate ANI for viruses with custom parameters (--fragLen 500 -minFraction 0.8) and for prokaryotic hosts with a custom setting (-minFraction 0.5) [44].”
MethodInfluentialWahl, A., Fischer, M. A., Klaper, K., Müller, A., Borgmann, S., Friesen, J., Hunfeld, K., Ilmberger, A., Kolbe-Busch, S., Kresken, M., et al. (2024) · International Journal of Medical Microbiology · doi:10.1016/j.ijmm.2024.151601 · Cited by 36
Sulaiman, J. E., Thompson, J. C., Qian, Y., Vivas, E. I., Diener, C., Gibbons, S. M., Safdar, N., & Venturelli, O. S. (2024) · Nature Communications · doi:10.1038/s41467-024-51062-w · Cited by 36
Chai, Z., Tian, Z., Zheng, M., Wang, B., Li, Y., Cui, J., Ju, F., Niu, J., & Guo, J. (2024) · Water Research · doi:10.1016/j.watres.2024.122949 · Cited by 35
Xu, Z. S., Pham, V. D., Yang, X., & Gänzle, M. G. (2025) · Microbiome · doi:10.1186/s40168-024-02026-1 · Cited by 37
Interindividual variability in gut microbiome mediates the efficacy of resistant starch on MASLD
Long, X., Wang, H., Lu, Y., Gao, X., Xiao, Y., Zhang, M., Guo, J., Yang, H. J., Zhang, R., Li, Q., et al. (2025) · Cell Metabolism · doi:10.1016/j.cmet.2025.10.017 · Cited by 37
Phylogenomic Rhizobium Species Are Structured by a Continuum of Diversity and Genomic Clusters
González, V., Santamaría, R. I., Bustos, P., Pérez-Carrascal, O. M., Vinuesa, P., Juárez, S., Martínez‐Flores, I., Cevallos, M. A., Brom, S., Martínez‐Romero, E., et al. (2019) · Frontiers in Microbiology · doi:10.3389/fmicb.2019.00910 · Cited by 35
“…et al., 2006; Young et al., 2006; Shamseldin et al., 2016); and, (iii) the fact that large mobile plasmids—known as symbiotic plasmids, or pSym—and symbiotic islands encode most of the essential genes for root nodulation and nitrogen fixation (Johnston et al., 1978; Sullivan and Ronson, 1998).”
BackgroundLocal Necrotic Cells Trigger Systemic Immune Activation via Gut Microbiome Dysbiosis in Drosophila
Kosakamoto, H., Yamauchi, T., Akuzawa-Tokita, Y., Nishimura, K., Soga, T., Murakami, T., Mori, H., Yamamoto, K., Miyazaki, R., Koto, A., et al. (2020) · Cell Reports · doi:10.1016/j.celrep.2020.107938 · Cited by 35
Microbial Strategies for Survival in the Glass Sponge Vazella pourtalesii
Bayer, K., Busch, K., Kenchington, E., Beazley, L. I., Franzenburg, S., Michels, J., Hentschel, U., & Slaby, B. M. (2020) · mSystems · doi:10.1128/msystems.00473-20 · Cited by 35
“The phylogenomic trees produced by GTDB-Tk (77, 92, 93) were visualized on the Interactive Tree Of Life (iTOL) platform v4.”
MethodNovick, A., & Doolittle, W. F. (2021) · Studies in History and Philosophy of Science Part A · doi:10.1016/j.shpsa.2021.03.006 · Cited by 35
Shibu, P., McCuaig, F., McCartney, A. L., Kujawska, M., Hall, L. J., & Hoyles, L. (2021) · Microbial Genomics · doi:10.1099/mgen.0.000592 · Cited by 35
“The species affiliations of the genomes encoding the full kleboxymycin BGC were determined using FastANI v1.”
BackgroundMethodInfluentialRamírez-Fernández, L., Orellana, L. H., Johnston, E. R., Konstantinidis, K. T., & Orlando, J. (2021) · The Science of The Total Environment · doi:10.1016/j.scitotenv.2021.147693 · Cited by 33
Self-citationPetrillo, C., Castaldi, S., Lanzilli, M., Selci, M., Cordone, A., Giovannelli, D., & Isticato, R. (2021) · Frontiers in Microbiology · doi:10.3389/fmicb.2021.715678 · Cited by 35
Wu, M., Wang, Q., Wang, C., Zeng, Q., Li, J., Wu, H., Wu, B., Xu, H. Y., & Qiu, Z. (2022) · Ecotoxicology and Environmental Safety · doi:10.1016/j.ecoenv.2022.113956 · Cited by 35
Bista, P. K., Pillai, D., Roy, C., Scaria, J., & Narayanan, S. K. (2022) · Microbiology Spectrum · doi:10.1128/spectrum.00297-22 · Cited by 33
“necrophorum were analyzed using the FastANI algorithm by constructing an ANI heat map (53).”
MethodLinking prokaryotic genome size variation to metabolic potential and environment
Rodríguez-Gijón, A., Buck, M., Andersson, A., Izabel-Shen, D., Nascimento, F. J. A., & Garcia, S. (2023) · bioRxiv · doi:10.1038/s43705-023-00231-x · Cited by 29
Baker, J. L. (2023) · FEMS Microbiology Reviews · doi:10.1093/femsre/fuad051 · Cited by 37
Hadza Prevotella require diet-derived microbiota-accessible carbohydrates to persist in mice
Gellman, R., Olm, M. R., Terrapon, N., Enam, F., Higginbottom, S. K., Sonnenburg, J. L., & Sonnenburg, E. D. (2023) · Cell Reports · doi:10.1016/j.celrep.2023.113233 · Cited by 34
Nuhamunada, M., Mohite, O. S., Phaneuf, P. V., Palsson, B. Ø., & Weber, T. (2024) · Nucleic Acids Research · doi:10.1093/nar/gkae314 · Cited by 36
Sun, X., Xue, F., Cong, C., Murtaza, B., Wang, L., Li, X., Li, S., & Xu, Y. (2024) · Food Research International · doi:10.1016/j.foodres.2024.114607 · Cited by 34
Genomes OnLine Database (GOLD) v.10: new features and updates
Mukherjee, S., Stamatis, D., Li, C. T., Ovchinnikova, G., Kandimalla, M., Handke, V., Reddy, A., Ivanova, N., Woyke, T., Eloe‐Fadrosh, E. A., et al. (2024) · Nucleic Acids Research · doi:10.1093/nar/gkae1000 · Cited by 39
Wilson, B. C., Zuppi, M., Derraik, J. G. B., Albert, B. B., Tweedie‐Cullen, R. Y., Leong, K. S. W., Beck, K. L., Vatanen, T., O'Sullivan, J. M., Cutfield, W. S., et al. (2025) · Nature Communications · doi:10.1038/s41467-025-62752-4 · Cited by 40
Metadata
- Authors
- Jain, C., Rodriguez-R, L. M., Phillippy, A. M., Konstantinidis, K. T., & Aluru, S.
- Affiliations
- National Institutes of Health (US)
- Georgia Institute of Technology (US)
- Corresponding author
- Konstantinidis, Konstantinos T.
- Aluru, Srinivas
- ORCID
- Venue
- Nature Communications
- Published
- 2018-11-30
- Volume
- 9
- Issue
- 1
- Pages
- 5114-5114
- ISSN
- 2041-1723 (ISSN-L)
- PMC
- PMC6269478
- OpenAlex
- W2951254987
- Cited by
- 5,748
- References
- 40
- Citations by year
- 2026: 1107 · 2025: 1110 · 2024: 977 · 2023: 789 · 2022: 695 · 2021: 617 · 2020: 305 · 2019: 128 · 2018: 16
- FWCI
- 96.11
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Nature Communications (publishedVersion, cc-by)
- bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, other-oa)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- RePEc: Research Papers in Economics (submittedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- Funders
- National Science Foundation (1416259, 1816027, 1356288)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
- Health Sciences › Medicine › Microbiology (medical) › Bacterial Identification and Susceptibility Testing
- Physical Sciences › Environmental Science › Ecology › Microbial Community Ecology and Physiology
- Keywords
- average nucleotide identity, prokaryotic genomes, species boundaries, taxonomic classification, draft genome sequence
- MeSH terms
- Phylogeny, Prokaryotic Cells, Genetic Variation, Databases, Factual, Genome, Bacterial, Sequence Analysis, DNA
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