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Species-specific genomic sequences for classification of bacteria
Bobby Paul1, K Kavia Raj1, Thokur Sreepathy Murali2
1Department of Bioinformatics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, 576104, India.
Computers in Biology and Medicine
|July 14, 2020
Summary
Researchers identified unique genomic regions in 100 bacterial species using genome comparison. These species-specific DNA sequences can improve bacterial classification and serve as novel DNA barcodes for microbial identification.
Area of Science:
- Microbiology
- Genomics
- Bioinformatics
Background:
- Bacterial classification traditionally relies on genomic relatedness, but genetic variation poses challenges.
- Recent reclassifications highlight the importance of intra-species genome comparisons, driven by next-generation sequencing.
- Advances in genome comparison have revolutionized microbial classification systems.
Purpose of the Study:
- To identify unique genomic segments within intra-species bacterial genomes.
- To develop novel DNA barcodes for bacterial identification and classification.
- To create a database of species-specific genomic regions for 100 bacterial species.
Main Methods:
- Genome comparison analysis of 1104 bacterial genome assemblies (excluding plasmids).
- Extensive bioinformatics analysis to identify species-specific genomic regions.
- Design of unique primers for identified genomic regions.
Main Results:
- Identification of unique genomic regions specific to 100 bacterial species across 62 genera.
- Design of primers for these species-specific regions, including 62 pathogenic and 13 opportunistic pathogenic species.
- Development of a public database (http://slsdb.manipal.edu/bact/) for these genomic regions.
Conclusions:
- The identified species-specific genomic regions can significantly impact in silico and molecular bacterial classification and identification methods.
- These regions may serve as superior DNA barcodes compared to currently used markers for bacterial delineation.
- The findings have potential applications in various translational research programs.
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