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Combined cross-linked enzyme aggregates of glycerol dehydrogenase and NADH oxidase for high efficiency in situ NAD+ regeneration
- Source :
- International Journal of Biological Macromolecules. 144:1013-1021
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- Cofactor regeneration is an important method to avoid the consumption of large quantities of oxidized cofactor NAD+ in enzyme-catalyzed reactions. Herein, glycerol dehydrogenase (GDH) and NADH oxidase preparations by aggregating enzymes with ammonium sulphate followed by cross-linking formed aggregates for effective regeneration of NAD+. After optimization, the activity of combi-CLEAs and separate CLEAs mixtures were 950 and 580 U/g, respectively. And the catalytic stability of combi-CLEAs against pH and temperature was superior to the free enzyme mixture. After ten cycles of reuse, the catalytic efficiency could still retain 63.3% of its initial activity, indicating that the constructed combi-CLEAs system had excellent reusability. Also, the conversion of glycerol to 1,3-dihydroxyacetone (DHA) was improved by the constructed NAD+ regeneration system, resulting in 4.6%, which was 2.5 times of the free enzyme system. Thus, wide applications of this co-immobilization method in the production of various chiral chemicals could be expected in the industry for its high efficiency at a low cost.
- Subjects :
- chemistry.chemical_classification
0303 health sciences
biology
Regeneration (biology)
02 engineering and technology
General Medicine
021001 nanoscience & nanotechnology
Biochemistry
Combinatorial chemistry
Cofactor
Catalysis
03 medical and health sciences
chemistry.chemical_compound
Enzyme
chemistry
Structural Biology
Glycerol dehydrogenase
Glycerol
biology.protein
Ammonium
NAD+ kinase
0210 nano-technology
Molecular Biology
030304 developmental biology
Subjects
Details
- ISSN :
- 01418130
- Volume :
- 144
- Database :
- OpenAIRE
- Journal :
- International Journal of Biological Macromolecules
- Accession number :
- edsair.doi...........4087b3dca823daafd8262467fcb2f105