Document Detail

Biosensors for d: -amino Acid detection.
MedLine Citation:
PMID:  21956573     Owner:  NLM     Status:  In-Data-Review    
The presence of D: -amino acids in foods is promoted by harsh technological processes (e.g., high temperature or extreme pH values) or can be the consequence of adulteration or microbial contamination (D: -amino acids are major components of the bacterial cell wall). For this reason, quality control is becoming more and more important both for the industry (as a cost factor) and for consumer protection. For routine food analysis and quality control, simple and easily applicable analytical methods are needed: biosensors can often satisfy these requirements. The use of an enzymatic, stereospecific reaction could confer selectivity to a biosensor for detecting and quantifying D: -amino acids in foodstuffs. The flavoenzyme D: -amino acid oxidase from the yeast Rhodotorula gracilis is an ideal biocatalyst for this kind of application because of its absolute stereospecificity, very high turnover number with various substrates, tight binding with the FAD cofactor, and broad substrate specificity.Furthermore, alterations in the local brain concentrations of D: -serine (predominantly D: -amino acid in the mammalian central nervous system) have been related to several neurological and psychiatric diseases. Therefore, quantifying this neuromodulator represents an important task in biological, medical, and pharmaceutical research. Recently, an enzymatic microbiosensor, also using R. gracilis D: -amino acid oxidase as biocatalyst, was developed for detecting D: -serine in vivo.
Silvia Sacchi; Elena Rosini; Laura Caldinelli; Loredano Pollegioni
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Methods in molecular biology (Clifton, N.J.)     Volume:  794     ISSN:  1940-6029     ISO Abbreviation:  Methods Mol. Biol.     Publication Date:  2012  
Date Detail:
Created Date:  2011-09-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9214969     Medline TA:  Methods Mol Biol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  313-24     Citation Subset:  IM    
Dipartimento di Biotecnologie e Scienze Molecolari, Università degli Studi dell'Insubria, Varese, Italy,
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