Oxygen concentration-dependent induction of a 140-kDa protein in magnetic bacterium Magnetospirillum magnetotacticum MS-1
1993; Oxford University Press; Volume: 107; Issue: 2-3 Linguagem: Inglês
10.1111/j.1574-6968.1993.tb06025.x
ISSN1574-6968
AutoresH Sakaguchi, Hiromi Hagiwara, Yoshihiro Fukumori, Yutaka Tamaura, M. Funaki, Shigehisa Hirose,
Tópico(s)Geology and Paleoclimatology Research
ResumoThe magnetic bacterium Magnetospirillum magnetotacticum prefers a microaerobic habitat and should be able to sense oxygen. Therefore, the bacterium was cultured under atmospheres containing 0–5% O2 and analyzed for oxygen-dependent changes in the levels of its protein components by sodium dodecyl sulfate-polyccrylamide gel electrophoresis (SDS-PAGE). The analysis revealed a marked anaerobic induction of a 140-kDa protein, which was suppressed when M. magnetotacticum was switched from microaerobic ( 1% O2) growth conditions. Although its function remains to be determined, the 140-kDa protein may serve as a useful tool to gain insight into the physiology of the organism.
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