Carbohydrate carbonyl mobility -: the key process in the formation of α-dicarbonyl intermediates

被引:24
作者
Reihl, O [1 ]
Rothenbacher, TM [1 ]
Lederer, MO [1 ]
Schwack, W [1 ]
机构
[1] Univ Hohenheim, Inst Lebensmittelchem 170, D-70593 Stuttgart, Germany
关键词
Maillard reaction; quinoxaline; dideoxyosone; o-phenylenediamine (OPD); advanced glycation end product (AGE);
D O I
10.1016/j.carres.2004.03.024
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Covalently cross-linked proteins are among the major modifications caused by the advanced Maillard reaction. In the present study, the formation pathway of the dideoxyosone N-6-(2,3-dihydroxy-5,6-dioxohexyl)-L-lysine is shown. To elucidate the formation of this glucose-derived dideoxyosone D-lactose (O-beta-D-galp-(1 --> 4)-D-glcp) and D-glucose-6-phosphate were incubated with lysine in the presence of the trapping reagent o-phenylenediamine (OPD). Synthesis and unequivocal structural characterization were reported for the quinoxalines of the dideoxyosones N6-(5,6-dihydroxy-2,3-dioxohexyl)-L-lysine and N-6-(2,3-dihydroxy-4,5-dioxohexyl)-L-lysine, respectively. Additionally, dicarbonyl compounds derived from D-erythrose, D-glycero-D-mannoheptose, and D-gluco-L-talooctose were synthesized and structurally characterized. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1609 / 1618
页数:10
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