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An overview of biological production of L-theanine

Paper ID Volume ID Publish Year Pages File Format Full-Text
14218 1191 2015 8 PDF Available
Title
An overview of biological production of L-theanine
Abstract

L-Theanine (γ-glutamylethylamide) is a unique non-protein amino acid that is naturally found in tea plants. It contributes to the umami taste and unique flavor to green tea infusion, and thus its content in tea leaves highly impacts the tea quality and price. In addition to the graceful taste, it has been proved to have many beneficial physiological effects, especially promoting relaxation and improving concentration and learning ability. Based on these promising advantages, L-theanine has been commercially developed as a valuable ingredient for use in food and beverages to improve and/or maintain human health. L-Theanine can be obtained by chemical synthesis or isolation from tea, while chemical synthesis of L-theanine is hard to be accepted by consumers and is not allowed to use in food industry, and isolation of L-theanine in high purity generally involves time-consuming, cost-ineffective, and complicated operational processes. Accordingly, the biological production of L-theanine has recently attracted much attention. Four kinds of bacterial enzymes, including L-glutamine synthetase, γ-glutamylmethylamide synthetase, γ-glutamyltranspeptidase, and L-glutaminase, have been characterized to have L-theanine-producing ability. Herein, an overview of recent studies on the biological production of L-theanine was presented.

Keywords
L-Theanine; L-Glutamine synthetase; γ-Glutamylmethylamide synthetase; γ-Glutamyltranspeptidase; L-Glutaminase
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An overview of biological production of L-theanine
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biotechnology Advances - Volume 33, Issues 3–4, May–August 2015, Pages 335–342
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
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Any Questions? feel free to contact us