Inter- and intramolecular domain interactions of the catalase-peroxidase KatG fromM. tuberculosis
نویسندگان
چکیده
منابع مشابه
Isoniazid activation defects in recombinant Mycobacterium tuberculosis catalase-peroxidase (KatG) mutants evident in InhA inhibitor production.
Mycobacterium tuberculosis KatG catalyzes the activation of the antitubercular agent isoniazid to yield an inhibitor targeting enoyl reductase (InhA). However, no firm biochemical link between many KatG variants and isoniazid resistance has been established. In the present study, six distinct KatG variants identified in clinical Mycobacterium tuberculosis isolates resistant to isoniazid were ge...
متن کاملAccess channel residues Ser315 and Asp137 in Mycobacterium tuberculosis catalase-peroxidase (KatG) control peroxidatic activation of the pro-drug isoniazid.
Peroxidatic activation of the anti-tuberculosis pro-drug isoniazid by Mycobacterium tuberculosis catalase-peroxidase (KatG) is regulated by gating residues of a heme access channel. The steric restriction at the bottleneck of this channel is alleviated by replacement of residue Asp137 with Ser, according to crystallographic and kinetic studies.
متن کاملInter- and intramolecular dispersion interactions
We have investigated the performance of a variety of density functional methods for weak intra- and intermolecular dispersion interactions. Grimme's empirical dispersion correction method is shown to give a good description for these interactions and helps to improve the description of water-hexamer isomers, noble-gas dimers, hydrocarbon C(12)H(12) isomers, branching energy of linear versus bra...
متن کاملDocking simulations and QM/MM studies between isoniazid prodrug, catalase-peroxidase (KatG) and S315T mutant from Mycobacterium tuberculosis
†Departamento de Quı́mica, Universidade Federal de Lavras—UFLA, Campus Universitário, Lavras, Caixa Postal 3037, Lavras, MG CEP: 37200-000, Brazil ‡Centro Brasileiro de Pesquisas Fı́sicas (CBPF), Rua Dr. Xavier Sigaud, 150, Urca, Rio de janeiro, RJ 22290-180, Brazil {Departamento de Quı́mica Orgânica, Instituto de Quı́mica, Universidade Federal do Rio de Janeiro, Ilha do Fundão, CT, Bl. A, Lab. 609...
متن کاملCrystallization and preliminary X-ray analysis of the catalase-peroxidase KatG from Burkholderia pseudomallei.
The bifunctional catalase-peroxidase KatG encoded by the katG gene of Burkholderia pseudomallei has a predicted subunit size of 81.6 kDa. It shows high sequence similarity to other catalase-peroxidases of bacterial, archaebacterial and fungal origin, including 64% identity to KatG from Mycobacterium tuberculosis and lesser sequence similarity to members of the plant peroxidase family. Crystals ...
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ژورنال
عنوان ژورنال: FEBS Letters
سال: 2001
ISSN: 0014-5793
DOI: 10.1016/s0014-5793(01)03179-9