Polycyclic aromatic hydrocarbon degradation by a psychrotolerant pseudomonad isolated from Antarctica
- Polycyclic aromatic hydrocarbon degradation by a psychrotolerant pseudomonad isolated from Antarctica
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- 남극 psychrotolerant pseudomonad 균주에 의한 다환방향족화합물 분해
- Yoo, Miyoun
- Antarctica; Pseudomonas; naphthalene
- Issue Date
- Yoo, Miyoun, et al. 2011. Polycyclic aromatic hydrocarbon degradation by a psychrotolerant pseudomonad isolated from Antarctica. 미국미생물학회. 미국미생물학회. 2011.05.21~.
- Pseudomonas strain MC1 was isolated from the waste water treatment facilities at the
Korea’s King Sejong station (62°13′S 58°47′W) on King George Island for the ability
to grow on naphthalene as the sole carbon and energy source. MC1 was also found to grow
well on phenanthrene and biphenyl. Growth substrate range experiments coupled with the
ring-cleavage enzyme assay data suggest that MC1 initially metabolizes naphthalene to
salicylate with subsequent degradation through meta-ring cleavage pathway. One
interesting aspect of the MC1 growth is that growth temperature optima are different for
different growth substrates. Namely, on succinate, MC1 showed optimal growth at the
temperature of 15-30°C whereas its growth on salicylate is significantly inhibited
above 27°C with accumulation of brownish-colored compound in the medium. This
observation indicates that a certain enzyme(s) responsible for metabolizing salicylate
is more thermo-unstable than the ones involved in the metabolism succinate. This
hypothesis is in good agreement with the fact that when grown on salicylate MC1 reaches
higher growth peaks, with the highest at 5°C, as the culture temperature decreases.
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