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Area of Science:

  • Food Science
  • Biochemistry
  • Analytical Chemistry

Background:

  • D-amino acids in food can indicate harsh processing, contamination, or adulteration, necessitating robust quality control.
  • D-amino acids, like D-serine in the brain, are linked to neurological and psychiatric conditions, making their quantification vital for medical research.

Purpose of the Study:

  • To develop and utilize a stereospecific biosensor for the accurate detection and quantification of D-amino acids in foodstuffs.
  • To highlight the importance of D-amino acid quantification in both food safety and biomedical applications.

Main Methods:

  • Employing the flavoenzyme D-amino acid oxidase from Rhodotorula gracilis as a stereospecific biocatalyst.
  • Developing an enzymatic microbiosensor for detecting D-amino acids, including D-serine in vivo.

Main Results:

  • The D-amino acid oxidase exhibits absolute stereospecificity, high turnover, and broad substrate specificity, making it suitable for biosensor applications.
  • An enzymatic microbiosensor was successfully developed for in vivo D-serine detection.

Conclusions:

  • Enzymatic biosensors offer a simple, selective, and effective method for routine food analysis and quality control of D-amino acids.
  • The developed biosensor technology holds significant potential for biological, medical, and pharmaceutical research, particularly in monitoring neuromodulators like D-serine.