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

  • Ocean University of China
  • Ministry of Natural Resources of the People's Republic of China
  • Harbin Institute of Technology Weihai

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)311-316
Number of pages6
JournalWorld Journal of Microbiology and Biotechnology
Volume22
Issue number4
DOIs
StatePublished - Apr 2006
Externally publishedYes

Keywords

  • Cold-adaptation
  • CspA
  • GST
  • Near-freezing temperature
  • Psychrophilic bacterium

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