Barotolerant E.coli Induced by High Hydrostatic Pressure.

Sheng Wu Hua Xue Yu Sheng Wu Wu Li Xue Bao (Shanghai)

Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, the Chinese Academy of Sciences, Shanghai 200031, China.

Published: January 2001

The barotolerant E.coli TG1P, DH5alphaP, HB101P were obtained from TG1,DH5alpha, HB101 after treatment with high hydrostatic pressure, and the survival rates of the formers raised 2--3 magnitude, from 1.06x10(-6), 2.98x10(-4), 3.65x10(-3) to 8.31x10(-3), 3.40x10(-1), 1.69x10(-1),respectively. Comparison of partial proteomes of wild and barotolerant bacteria of TG1 and DH5alpha with two-dimensional electrophoresis showed that three proteins were obviously highly expressed in barotolerant bacteria. The N terminal sequence and molecular weight of one protein was shown to be V(L)EAGEFFMRA and 21 kD, with high identity to a known outmembrane protein in E.coli.

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