Resonance Raman spectroscopy of Compound II and its decay in Mycobacterium tuberculosis catalase-peroxidase KatG and its isoniazid resistant mutant S315T

Sofia M. Kapetanaki, Salem Chouchane, Shengwei Yu, Richard S. Magliozzo, Johannes Schelvis

Research output: Contribution to journalArticle

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Abstract

The reaction of Mycobacterium tuberculosis KatG and the mutant KatG(S315T) with two different organic peroxides is studied using resonance Raman spectroscopy. For the first time, an intermediate is observed in a catalase-peroxidase with vibrations that are characteristic of Compound II. The observation of this intermediate is consistent with photoreduction of Compound I and is in agreement with the formation of Compound I during the catalytic cycle of KatG. The same intermediate is detected in KatG(S315T), a mutant associated with resistance to isoniazid (INH), but with a lower yield, indicating that the organic peroxides cannot react with the heme iron in KatG(S315T) as efficiently as in wild-type KatG. Our results are consistent with catalytic competence of the S315T mutant and support the model that the S315T mutation confers antibiotic resistance by modifying the interaction between the enzyme and the drug.

Original languageEnglish
Pages (from-to)1401-1406
Number of pages6
JournalJournal of Inorganic Biochemistry
Volume99
Issue number6
DOIs
StatePublished - 1 Jun 2005

Fingerprint

Raman Spectrum Analysis
Isoniazid
Peroxides
Mycobacterium tuberculosis
Catalase
Peroxidase
Raman spectroscopy
Microbial Drug Resistance
Vibration
Heme
Mental Competency
Iron
Observation
Anti-Bacterial Agents
Mutation
Enzymes
Pharmaceutical Preparations

Keywords

  • Catalase-peroxidase
  • Compound II
  • Isoniazid
  • Mycobacterium tuberculosis
  • Resonance Raman

Cite this

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title = "Resonance Raman spectroscopy of Compound II and its decay in Mycobacterium tuberculosis catalase-peroxidase KatG and its isoniazid resistant mutant S315T",
abstract = "The reaction of Mycobacterium tuberculosis KatG and the mutant KatG(S315T) with two different organic peroxides is studied using resonance Raman spectroscopy. For the first time, an intermediate is observed in a catalase-peroxidase with vibrations that are characteristic of Compound II. The observation of this intermediate is consistent with photoreduction of Compound I and is in agreement with the formation of Compound I during the catalytic cycle of KatG. The same intermediate is detected in KatG(S315T), a mutant associated with resistance to isoniazid (INH), but with a lower yield, indicating that the organic peroxides cannot react with the heme iron in KatG(S315T) as efficiently as in wild-type KatG. Our results are consistent with catalytic competence of the S315T mutant and support the model that the S315T mutation confers antibiotic resistance by modifying the interaction between the enzyme and the drug.",
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Resonance Raman spectroscopy of Compound II and its decay in Mycobacterium tuberculosis catalase-peroxidase KatG and its isoniazid resistant mutant S315T. / Kapetanaki, Sofia M.; Chouchane, Salem; Yu, Shengwei; Magliozzo, Richard S.; Schelvis, Johannes.

In: Journal of Inorganic Biochemistry, Vol. 99, No. 6, 01.06.2005, p. 1401-1406.

Research output: Contribution to journalArticle

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T1 - Resonance Raman spectroscopy of Compound II and its decay in Mycobacterium tuberculosis catalase-peroxidase KatG and its isoniazid resistant mutant S315T

AU - Kapetanaki, Sofia M.

AU - Chouchane, Salem

AU - Yu, Shengwei

AU - Magliozzo, Richard S.

AU - Schelvis, Johannes

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AB - The reaction of Mycobacterium tuberculosis KatG and the mutant KatG(S315T) with two different organic peroxides is studied using resonance Raman spectroscopy. For the first time, an intermediate is observed in a catalase-peroxidase with vibrations that are characteristic of Compound II. The observation of this intermediate is consistent with photoreduction of Compound I and is in agreement with the formation of Compound I during the catalytic cycle of KatG. The same intermediate is detected in KatG(S315T), a mutant associated with resistance to isoniazid (INH), but with a lower yield, indicating that the organic peroxides cannot react with the heme iron in KatG(S315T) as efficiently as in wild-type KatG. Our results are consistent with catalytic competence of the S315T mutant and support the model that the S315T mutation confers antibiotic resistance by modifying the interaction between the enzyme and the drug.

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