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The positive effect of exogenous hemin on a resistance of strict anaerobic archaeon Methanobrevibacter arboriphilus to oxidative stressesстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 8 апреля 2022 г.
- Авторы: Brioukhanov Andrei L., Netrusov Alexander I.
- Журнал: Current Microbiology
- Том: 65
- Номер: 4
- Год издания: 2012
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- Первая страница: 375
- Последняя страница: 383
- DOI: 10.1007/s00284-012-0168-6
- Аннотация: Methanogenic archaeon Methanobrevibacter arboriphilus (strains AZ and DH1), which is a strict anaerobic microorganism not able to synthesize heme, possessed a very high catalase activity in the presence of 20-50 μM hemin in a growth medium. We investigated the effect of various oxidative stresses (hydrogen peroxide and oxygenation) on M. arboriphilus cells grown on the standard nutrient medium supplemented with 0.1 % yeast extract, and on the same medium supplemented with hemin. It was demonstrated that 30 μM hemin had a very significant positive effect on the resistance of M. arboriphilus strains to H(2)O(2) and O(2) stresses because of 30- to 40-fold increase of heme catalase activity. Thus, hydrogen peroxide (0.6-1.2 mM) or oxygen (3-5 %) had a strong negative impact on low-catalase cultures grown in the hemin-free standard medium, whereas the presence of 30 μM hemin in the medium results in a high yield of biomass even under conditions of four times stronger H(2)O(2) and two times stronger O(2) stresses. The intracellular catalase activity reached a high level in 30-60 min after hemin was added to the nutrient medium, but the activity already increased about 5-7-fold in 6 min after hemin addition. Our experimental data suggest that exogenous hemin provides an effective antioxidative defense in representatives of the genus Methanobrevibacter, specially playing an important role in the puromycin-insensitive formation of the active heme-containing catalase from presynthesized apoenzyme and heme.
- Добавил в систему: Брюханов Андрей Леонидович