Glutamate oxidase advances the selective bioanalytical detection of the neurotoxic amino acid beta-ODAP in grass pea: A decade of progress
Författare
Summary, in English
The search for an enzyme as a reagent for selective bioanalytical detection of the neurotoxic amino acid, beta-N-oxalyl-L-,alpha,beta-diaminopropionic acid, beta-ODAP (found in grass pea, Lathyrus sativus) led to its redox catalytic reaction by glutamate oxidase (GluOx). Homogeneous kinetic studies and an immobilized GluOx reactor-based flow-injection assay were initially made for beta-ODAP with small immobilized GluOx/catalase glutamate-destroying prereactors. The method was applied to examine the toxin content in processed grass pea. The kinetics and the equilibrium of the thermal isomerization of beta-ODAP to the nontoxic isomer alpha-ODAP established that GluOx is specific to the neurotoxin. The first ever GluOx-based amperometric biosensor for liquid chromatography (LC) detection was reported in 1997. This biosensor coupled with a refractive index detector improved LC performance. The most recent work with GluOx resulted in MnO2-based screen-printed amperometric biosensor, with offline elimination of glutamate interference by glutamate decarboxylase. A single-shot chemiluminescent sensor developed for hydrogen peroxide is also proposed for beta-ODAP with GluOx application. This decade of progress resulted from studies that included four Ph.D. (Ethiopia, Sweden, Austria), four M.Sc. (Ethiopia, Sweden) and Licentiate (Sweden) theses projects, plus one collaborative project in Sweden. The advances in grass pea research may be regarded as a model north-south cooperation for research and education.
Publiceringsår
2004
Språk
Engelska
Sidor
765-775
Publikation/Tidskrift/Serie
Pure and Applied Chemistry
Volym
76
Issue
4
Länkar
Dokumenttyp
Artikel i tidskrift
Förlag
IUPAC
Ämne
- Analytical Chemistry
- Nutrition and Dietetics
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0033-4545