Modification of chimeric (2S, 3S)-butanediol dehydrogenase based on structural information

Protein Pept Lett. 2014;22(3):226-33. doi: 10.2174/0929866522666150121120823.

Abstract

A chimeric (2S, 3S)-butanediol dehydrogenase (cLBDH) was engineered to have the strict (S)-configuration specificity of the (2S, 3S)-BDH (BsLBDH) derived from Brevibacterium saccharolyticum as well as the enzymatic stability of the (2R, 3S)-BDH (KpMBDH) from Klebsiella pneumonia by swapping the domains of two native BDHs. However, while cLBDH possesses the stability, it lacks the specificity. In order to assist in the design a BDH having strict substrate specificity, an X-ray structural analysis of a cLBDH crystal was conducted at 1.58 Å. The results obtained show some readily apparent differences around the active sites of cLBDH and BsLBDH. Based on this structural information, a novel (2S, 3S)-BDH having a preferred specificity was developed by introducing a V254L mutation into cLBDH. The influence of this mutation on the stability of cLBDH was not evaluated. Nevertheless, the technique described herein is an effective method for the production of a tailor-made BDH.

MeSH terms

  • Alcohol Oxidoreductases / chemistry*
  • Alcohol Oxidoreductases / genetics*
  • Bacterial Proteins / chemistry*
  • Bacterial Proteins / genetics*
  • Catalytic Domain
  • Cloning, Molecular
  • Corynebacterium / chemistry
  • Corynebacterium / classification
  • Corynebacterium / enzymology*
  • Corynebacterium / genetics
  • Crystallography, X-Ray
  • Enzyme Stability
  • Klebsiella / chemistry
  • Klebsiella / enzymology*
  • Klebsiella / genetics
  • Models, Molecular
  • Mutagenesis, Site-Directed
  • Structural Homology, Protein
  • Substrate Specificity

Substances

  • Bacterial Proteins
  • Alcohol Oxidoreductases
  • butanediol dehydrogenase