An association between ATP binding cassette systems, genome sizes and lifestyles of bacteria

Harland, DN; Garmory, HS; Brown, KA; Titball, RW; (2005) An association between ATP binding cassette systems, genome sizes and lifestyles of bacteria. Research in microbiology, 156 (3). pp. 434-442. ISSN 0923-2508 DOI:

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Comparative bioinformatic analyses of ATP binding cassette (ABC) systems encoded in bacterial genomes have been undertaken in order to examine whether the range and distribution of these systems correlates with niches occupied by different organisms. In general, bacteria with larger genornes were found to encode more ABC systems than those with smaller genomes. Environmental bacteria, generally containing the largest genomes, showed the greatest number and diversity of ABC systems. Extracellular bacteria have larger genomes and show higher relative numbers of ABC transporters in comparison to intracellular bacteria. Similar results were obtained when comparing bacteria with different respiratory requirements since aerobic bacteria have larger genomes and also display greater numbers of ABC systems than anaerobes. These results suggest that the number of ABC systems encoded in bacterial genomes correlates with genome size and also with the physiological niche in which bacteria live. Furthermore, the distribution of the ABC systems into families indicates that the process of reductive evolution is responsible for retaining particular types of ABC systems as bacteria adapt to particular niches. (c) 2005 Elsevier SAS. All rights reserved.

Item Type: Article
Keywords: ABC, genome bacterial, computational biology, environment, ABC TRANSPORTERS, ESCHERICHIA-COLI, IRON TRANSPORT, ORGANISMS, VIRULENCE, MANGANESE, MECHANISM, PROTEINS, FAMILIES, DATABASE, ATP-Binding Cassette Transporters, genetics, metabolism, Bacteria, Aerobic, genetics, metabolism, Bacteria, Anaerobic, genetics, metabolism, Computational Biology, Databases as Topic, Evolution, Molecular, Genome, Bacterial, Gram-Negative Bacteria, genetics, metabolism, Gram-Positive Bacteria, genetics, metabolism
Faculty and Department: Faculty of Infectious and Tropical Diseases > Dept of Pathogen Molecular Biology
PubMed ID: 15808948
Web of Science ID: 228604700018


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