Applied Microbiology and Biotechnology

, Volume 99, Issue 15, pp 6267–6275 | Cite as

Enzyme fusion for whole-cell biotransformation of long-chain sec-alcohols into esters

  • Eun-Yeong Jeon
  • A-Hyong Baek
  • Uwe T. Bornscheuer
  • Jin-Byung Park
Biotechnologically relevant enzymes and proteins

Abstract

Enzyme fusion was investigated as a strategy to improve productivity of a two-step whole-cell biocatalysis. The biotransformation of long-chain sec-alcohols into esters by an alcohol dehydrogenase (ADH) and Baeyer–Villiger monooxygenases (BVMOs) was used as the model reaction. The recombinant Escherichia coli, expressing the fusion enzymes between the ADH of Micrococcus luteus NCTC2665 and the BVMO of Pseudomonas putida KT2440 or Rhodococcus jostii RHA1, showed significantly greater bioconversion activity with long-chain sec-alcohols (e.g., 12-hydroxyoctadec-9-enoic acid (1a), 13-hydroxyoctadec-9-enoic acid (2a), 14-hydroxyicos-11-enoic acid (4a)) when compared to the recombinant E. coli expressing the ADH and BVMOs independently. For instance, activity of the recombinant E. coli expressing the ADH-Gly-BVMO, in which glycine-rich peptide was used as the linker, with 1a was increased up to 22 μmol g dry cells−1 min−1. This value is over 40 % greater than the recombinant E. coli expressing the ADH and BVMO independently. The substantial improvement appeared to be driven by an increase in the functional expression of the BVMOs and/or an increase in mass transport efficiency by localizing two active sites in close proximity.

Keywords

Enzyme fusion Whole-cell biocatalysis Baeyer–Villiger monooxygenase Alcohol dehydrogenase 

Supplementary material

253_2015_6392_MOESM1_ESM.pdf (662 kb)
ESM 1(PDF 662 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Eun-Yeong Jeon
    • 1
  • A-Hyong Baek
    • 1
  • Uwe T. Bornscheuer
    • 2
  • Jin-Byung Park
    • 1
  1. 1.Department of Food Science & EngineeringEwha Womans UniversitySeoulRepublic of Korea
  2. 2.Institute of Biochemistry, Department of Biotechnology & Enzyme CatalysisGreifswald UniversityGreifswaldGermany

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