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Expression of CspA and GST by an Antarctic psychrophilic bacterium Colwellia sp. NJ341 at near-freezing temperature

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Summary

A psychrotrophic bacterium Colwellia sp. NJ341 from Antarctic sea ice could grow at −5 and 22 °C, and the extent of cellular protein content and growth were greater at low temperatures (0–10 °C) than at higher temperatures. SDS-PAGE analysis demonstrated the presence of a 7 kDa cold-shock protein. The further result of two-dimensional electrophoresis (2-DE) showed that two proteins a and c were newly synthesized at near-freezing temperatures. With matrix-assisted laser desorption/ionization mass spectrometry (MALDI-TOF MS) analysis, proteins a and c were identified as glutathione S-transferase (GST) and cold-shock protein A (CspA), respectively, which were involved in cold-adaptation at near-freezing temperature in an Antarctic psychrophilic bacterium Colwellia sp. NJ341.

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Acknowledgements

We gratefully acknowledge the contribution of Dr Xiao-Hang Huang for help with the manuscript. This study was supported by Program of National Natural Science Foundation of China. (No. 40406003)

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Authors and Affiliations

  1. College of life Sciences, Ocean University of China, 266003, Qingdao, P.R. China

    Quan-Fu Wang

  2. Key Laboratory of Marine Bio-active Substances, First Institute of Oceanorgarphy, State Oceanic Administration, 266061, Qingdao, P.R. China

    Quan-Fu Wang, Jin-Lai Miao, Yu Ding & Guang-You Li

  3. Harbin Institute of Technology, 264209, Weihai, P.R. China

    Yan-Hua Hou

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  1. Quan-Fu Wang
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  2. Jin-Lai Miao
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  3. Yan-Hua Hou
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  4. Yu Ding
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  5. Guang-You Li
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Correspondence to Jin-Lai Miao.

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Wang, QF., Miao, JL., Hou, YH. et al. Expression of CspA and GST by an Antarctic psychrophilic bacterium Colwellia sp. NJ341 at near-freezing temperature. World J Microbiol Biotechnol 22, 311–316 (2006). https://doi.org/10.1007/s11274-005-9010-7

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  • DOI: https://doi.org/10.1007/s11274-005-9010-7

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