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Rational design of xylose dehydrogenase for improved thermostability and its application in development of efficient enzymatic biofuel cell

Paper ID Volume ID Publish Year Pages File Format Full-Text
16829 42615 2016 8 PDF Available
Title
Rational design of xylose dehydrogenase for improved thermostability and its application in development of efficient enzymatic biofuel cell
Abstract

•The simulated structure of XDH was obtained using homology modeling.•XDH mutants were displayed on the surface of E. coli .•The whole cell biocatalyst of mutated XDH showed excellent stability.•XDH mutant exhibited enhanced stability in xylose/O2 biofuel cell.

In this paper, the construction of 3D model structure of xylose dehydrogenase (XDH) by using homology modeling to guide the rational design of the enzyme for improving thermostability was reported. Three XDH mutants of NA-1 (+249L), NA-2 (G149P) and NA-3 (+249L/G149P) were designed and displayed on the surface of bacteria. Among them, bacteria displaying NA-1 (NA-1-bacteria) exhibited superior thermostability without compromising its activity and substrate specificity in comparison with its wild-type counterpart. NA-1-bacteria retained its original activity after incubation at room temperature for one-month with the half-life of 9.8 days at 40 °C. Finally, the NA-1-bacteria were applied to construct xylose/O2 based biofuel cell with good performance including enhanced operational stability. Thus, the approach described here could be explored for engineering of other enzymes for improving certain characters without three-dimensional structure identified by experimental methods.

Keywords
Homology modeling; Xylose dehydrogenase mutants; Thermostability; Microbial surface display; Xylose/O2 based biofuel cell
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Rational design of xylose dehydrogenase for improved thermostability and its application in development of efficient enzymatic biofuel cell
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 84, March 2016, Pages 78–85
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us