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Updated: Jan 10, 2026

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Published on: December 7, 2021
proGenomes4: providing 2 million accurately and consistently annotated high-quality prokaryotic genomes
Anthony Fullam1, Ivica Letunic2, Oleksandr M Maistrenko3
1Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg 69117,Germany.
Abstract:
The pervasive availability of publicly available microbial genomes has opened many new avenues for microbiology research, yet it also demands robust quality control and consistent annotation pipelines to ensure meaningful biological insights. proGenomes4 (prokaryotic Genomes v4) addresses this challenge by providing a resource of nearly 2 million high-quality microbial genomes, a doubling in scale from previous versions, encompassing over 7 billion genes. Each genome underwent rigorous quality assessment and comprehensive functional annotation by applying multiple standardized annotation workflows, including the systematic identification of mobile genetic elements and biosynthetic gene clusters. proGenomes4 contains 32 887 species with ecological habitat metadata as well as precomputed pan-genomes. This substantially expanded resource provides the microbiology community with a foundation for large-scale comparative studies and is freely accessible via a newly developed command line interface and at https://progenomes.embl.de/.
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