Screening and development of enzymes for determination and transformation of amino acids

Bioscience, Biotechnology, and Biochemistry
Yasuhisa Asano

Abstract

The high stereo- and substrate specificities of enzymes have been utilized for micro-determination of amino acids. Here, I review the discovery of l-Phe dehydrogenase and its practical use in the diagnosis of phenylketonuria in more than 5,400,000 neonates over two decades in Japan. Screening and uses of other selective enzymes for micro-determination of amino acids have also been discussed. In addition, novel enzymatic assays with the systematic use of known enzymes, including assays based on a pyrophosphate detection system using pyrophosphate dikinase for a variety of l-amino acids with amino-acyl-tRNA synthetase have been reviewed. Finally, I review the substrate specificities of a few amino acid-metabolizing enzymes that have been altered, using protein engineering techniques, mainly for production of useful chemicals, thus enabling the wider use of natural enzymes.

References

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Related Concepts

Metabolic Biotransformation
Neonatal Screening
Amino Acyl-tRNA Synthetases
Phenylalanine
Protein Engineering
Microbiology Procedure
Chemicals
Determination Aspects
Natural Products
Screening Generic

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