Homogeneous immunoassay for the detection of trinitrotoluene (TNT) based on the reactivation of apoglucose oxidase using a novel FAD-trinitrotoluene conjugate

被引：19

作者：

Dosch, M

Weller, MG

Buckmann, AF

Niessner, R

机构：

[1] Tech Univ Munich, Inst Hydrochem, D-81377 Munich, Germany

[2] Gesell Biotechnol Forsch GmbH, D-38124 Braunschweig, Germany

来源：

FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1998年 / 361卷 / 02期

关键词：

D O I：

10.1007/s002160050857

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A flavin adenine dinucleotide-trinitrotoluene derivative (FAD-TNT) was synthesized by coupling N-6-(2-aminoethyl)-FAD covalently to the N-hydroxysuccinimidyl ester of trinitrophenyl-gamma-aminobutyric acid and characterized by negative-ion electrospray-ionization mass spectrometry (ESI-MS) after purification by reversed-phase HPLC. Free FAD-TNT can be detected at very low levels by recombination with apoglucose oxidase, since the FAD-TNT-glucose oxidase complex is enzymatically active. On the contrary, if FAD-TNT has been bound by an anti-TNT antibody, the conjugate cannot recombine with apoglucose oxidase any more. Based on these two phenomena, a homogeneous apoenzyme reactivation immunoassay system (ARIS) was developed for the detection of TNT. No separation step is needed in this assay. Proportionality between the TNT concentration and enzyme activity was demonstrated with a detection limit of 5 mu g/L TNT.

引用

页码：174 / 178

页数：5

共 23 条

[1] Application of redox enzymes for probing the antigen-antibody association at monolayer interfaces: Development of amperometric immunosensor electrodes [J].