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Production of rubusoside from stevioside by using a thermostable lactase from Thermus thermophilus and solubility enhancement of liquiritin and teniposide

Paper ID Volume ID Publish Year Pages File Format Full-Text
17003 42630 2014 6 PDF Available
Title
Production of rubusoside from stevioside by using a thermostable lactase from Thermus thermophilus and solubility enhancement of liquiritin and teniposide
Abstract

•The expression and biochemical characterization of recombinant thermostable lactase from Thermus thermophiles in Escherichia coli.•Examined the conversion of stevioside to rubusoside using thirty-one enzymes.•Immobilized lactase preparation and optimization for the production of rubusoside.•Analysis of the increased water solubility of liquiritin and of teniposide using rubusoside.

Solubility is an important factor for achieving the desired plasma level of drug for pharmacological response. About 40% of drugs are not soluble in water in practice and therefore are slowly absorbed, which results in insufficient and uneven bioavailability and GI toxicity. Rubusoside (Ru) is a sweetener component in herbal tea and was discovered to enhance the solubility of a number of pharmaceutically and medicinally important compounds, including anticancer compounds. In this study, thirty-one hydrolyzing enzymes were screened for the conversion of stevioside (Ste) to Ru. Recombinant lactase from Thermus thermophiles which was expressed in Escherichia coli converted stevioside to rubusoside as a main product. Immobilized lactase was prepared and used for the production of rubusoside; twelve reaction cycles were repeated with 95.4% of Ste hydrolysis and 49 g L−1 of Ru was produced. The optimum rubusoside synthesis yield was 86% at 200 g L−1, 1200 U lactase. The purified 10% rubusoside solution showed increased water solubility of liquiritin from 0.98 mg mL−1 to 4.70 ± 0.12 mg mL−1 and 0 mg mL−1 to 3.42 ± 0.11 mg mL−1 in the case of teniposide.

Keywords
Rubusoside; Thermus thermophilus; Immobilized lactase; Liquiritin; Teniposide
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Production of rubusoside from stevioside by using a thermostable lactase from Thermus thermophilus and solubility enhancement of liquiritin and teniposide
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volumes 64–65, October 2014, Pages 38–43
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