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© Research
Publication : FEMS microbiology letters

On the catalase-peroxidase gene, katG, of Mycobacterium leprae and the implications for treatment of leprosy with isoniazid

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in FEMS microbiology letters - 15 Apr 1997

Eiglmeier K, Fsihi H, Heym B, Cole ST

Link to Pubmed [PMID] – 9141669

FEMS Microbiol. Lett. 1997 Apr;149(2):273-8

The toxicity of the potent tuberculocidal agent, isoniazid, is mediated by the heme-containing enzyme, catalase-peroxidase, encoded by the katG gene. Although isoniazid has been used for the treatment of leprosy, it is shown here that the katG gene of Mycobacterium leprae is a pseudogene, which has probably been inactivated by multiple mutations. Inactive genes were detected by the polymerase chain reaction in several isolates of M. leprae, of different geographical origins, and attempts to complement an isoniazid-resistant strain of Mycobacterium smegmatis with the katG pseudogene were unsuccessful. Isoniazid is thus likely to be of no therapeutic benefit to leprosy patients.

http://www.ncbi.nlm.nih.gov/pubmed/9141669