Archives of Microbiology

, Volume 188, Issue 1, pp 27–36

A cold-adapted esterase from psychrotrophic Pseudoalteromas sp. strain 643A

  • Hubert Cieśliński
  • Aneta M. Białkowska
  • Anna Długołęcka
  • Maurycy Daroch
  • Karolina L. Tkaczuk
  • Halina Kalinowska
  • Józef Kur
  • Marianna Turkiewicz
Original Paper

DOI: 10.1007/s00203-007-0220-2

Cite this article as:
Cieśliński, H., Białkowska, A.M., Długołęcka, A. et al. Arch Microbiol (2007) 188: 27. doi:10.1007/s00203-007-0220-2

Abstract

A psychrotrophic bacterium producing a cold-adapted esterase upon growth at low temperatures was isolated from the alimentary tract of Antarctic krill Euphasiasuperba Dana, and classified as Pseudoalteromonas sp. strain 643A. A genomic DNA library of strain 643A was introduced into Escherichiacoli TOP10F’, and screening on tributyrin-containing agar plates led to the isolation of esterase gene. The esterase gene (estA, 621 bp) encoded a protein (EstA) of 207 amino acid residues with molecular mass of 23,036 Da. Analysis of the amino acid sequence of EstA suggests that it is a member of the GDSL-lipolytic enzymes family. The purification and characterization of native EstA esterase were performed. The enzyme displayed 20–50% of maximum activity at 0–20°C. The optimal temperature for EstA was 35°C. EstA was stable between pH 9 and 11.5. The enzyme showed activity for esters of short- to medium-chain (C4 and C10) fatty acids, and exhibited no activity for long-chain fatty acid esters like that of palmitate and stearate. EstA was strongly inhibited by phenylmethylsulfonyl fluoride, 2–mercaptoethanol, dithiothreitol and glutathione. Addition of selected divalent ions e.g. Mg2+, Co2+ and Cu2+ led to the reduction of enzymatic activity and the enzyme was slightly activated (∼30%) by Ca2+ ions.

Keywords

Cold-adapted enzymePsychrotolerant bacteriumEsterases/lipasesGDSL esteraseCloning

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Hubert Cieśliński
    • 1
  • Aneta M. Białkowska
    • 2
  • Anna Długołęcka
    • 1
  • Maurycy Daroch
    • 2
  • Karolina L. Tkaczuk
    • 2
    • 3
  • Halina Kalinowska
    • 2
  • Józef Kur
    • 1
  • Marianna Turkiewicz
    • 2
  1. 1.Departament of MicrobiologyGdańsk University of TechnologyGdanskPoland
  2. 2.Institute of Technical Biochemistry (ITB)Technical University of ŁódźLodzPoland
  3. 3.Laboratory of Bioinformatics and Protein EngineeringInternational Institute of Molecular and Cell BiologyWarsawPoland