Cited by 1,777Leprosy Research and TreatmentGenomics and Phylogenetic StudiesResearch on Leishmaniasis Studies

Massive gene decay in the leprosy bacillus.

Open access
Cole, S. T., Eiglmeier, K., Parkhill, J., James, K. D., Thomson, N. R., Wheeler, P. R., Honoré, N., Garnier, T. +36 more·2001·Nature

Abstract

Leprosy, a chronic human neurological disease, results from infection with the obligate intracellular pathogen Mycobacterium leprae, a close relative of the tubercle bacillus. Mycobacterium leprae has the longest doubling time of all known bacteria and has thwarted every effort at culture in the laboratory. Comparing the 3.27-megabase (Mb) genome sequence of an armadillo-derived Indian isolate of the leprosy bacillus with that of Mycobacterium tuberculosis (4.41 Mb) provides clear explanations for these properties and reveals an extreme case of reductive evolution. Less than half of the genome contains functional genes but pseudogenes, with intact counterparts in M. tuberculosis, abound. Genome downsizing and the current mosaic arrangement appear to have resulted from extensive recombination events between dispersed repetitive sequences. Gene deletion and decay have eliminated many important metabolic activities including siderophore production, part of the oxidative and most of the microaerophilic and anaerobic respiratory chains, and numerous catabolic systems and their regulatory circuits.

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Crossref · 10.1038/35059006

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49 of 49 references verified0 citation errors · 0 not checkable

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  • The ESX-1 cluster is present in a range of mycobacteria, including Mycobacterium kansasii and Mycobacterium leprae.

    “Apart from members of the M. tuberculosis complex, the ESX-1 cluster is also present in a range of mycobacteria, including Mycobacterium kansasii [23] and Mycobacterium leprae [42].”
  • In M. leprae, almost all of the non-conserved ESX-1 components are pseudogenes, whereas all of the conserved components seem to be intact.

    “Furthermore, in M. leprae, an organism with an extreme reductive evolution of its genome, almost all of the non-conserved ESX-1 components are pseudogenes, whereas all of the conserved components seem to be intact [42].”

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Authors
Cole, S. T., Eiglmeier, K., Parkhill, J., James, K. D., Thomson, N. R., Wheeler, P. R., Honoré, N., Garnier, T., Churcher, C., Harris, D., Mungall, K., Basham, D., Brown, D., Chillingworth, T., Connor, R., Davies, R. M., Devlin, K., Duthoy, S., Feltwell, T., Fraser, A., Hamlin, N., Holroyd, S., Hornsby, T., Jagels, K., Lacroix, C., Maclean, J., Moule, S., Murphy, L., Oliver, K., Quail, M. A., Rajandream, M.-A., Rutherford, K. M., Rutter, S., Seeger, K., Simon, S., Simmonds, M., Skelton, J., Squares, R., Squares, S., Stevens, K., Taylor, K., Whitehead, S., Woodward, J. R., & Barrell, B. G.
Affiliations
  • Institut Pasteur (FR)
  • Wellcome Sanger Institute (GB)
  • Animal and Plant Health Agency (GB)
Corresponding author
Cole, S. T.
Venue
Nature
Published
2001-02
Volume
409
Issue
6823
Pages
1007-1011
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2164217177
Cited by
1,777
References
50
Citations by year
2026: 22 · 2025: 32 · 2024: 34 · 2023: 30 · 2022: 38 · 2021: 41 · 2020: 49 · 2019: 50 · 2018: 51 · 2017: 55 · 2016: 64 · 2015: 75 · 2014: 80 · 2013: 63 · 2012: 79
FWCI
94.38
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion)
  • Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion, cc-by-nc-nd)
Funders
  • New York Community Trust
  • Wellcome Trust
Topics
  • Health Sciences › Medicine › Infectious Diseases › Leprosy Research and Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Research on Leishmaniasis Studies
Keywords
Mycobacterium leprae, leprosy, genome reduction, reductive evolution, pseudogenes, gene decay, Mycobacterium tuberculosis, recombination, gene deletion, siderophore production, electron transport chain
MeSH terms
Animals, Armadillos, DNA, Bacterial, Energy Metabolism, Multigene Family, Humans, Leprosy, Molecular Sequence Data, Mycobacterium leprae, Genome, Bacterial, Sequence Analysis, DNA, Evolution, Molecular, Gene Transfer, Horizontal

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