Heterobifunctional reagents for cross-linking of sugar with protein.
作者:MIKIO OHNISHI、HIROYUKI SUGIMOTO、HIDENORI YAMADA、TAIJI IMOTO、KIYOSHI ZAITSU、YOSUKE OHKURA
DOI:10.1248/cpb.33.674
日期:——
N-Bromoacetylsulfanilyl chloride and p-bromoacetamidobenzoyl chloride were synthesized as heterobifunctional reagents for the cross-linking of sugar with protein. These reagents react with the primary hydroxyl group of a sugar at the acid chloride group and with amino and imidazole groups of protein at the bromoacetyl group. Methyl α-D-glucoside, selected as a model sugar, reacts with these reagents to form methyl 6-O-(N-bromoacetylsulfanilyl)-α-D-glucoside and methyl 6-O-(p-bromoacetamidobenzoyl)-α-D-glucoside, respectively. These sugar derivatives combine with bovine serum albumin at weakly alkaline pHs. More than 10 of the sugar derivatives can be incorporated into one molecule of the albumin.
研究人员合成了 N-溴乙酰磺酰氯和对溴乙酰胺基苯甲酰氯,作为糖与蛋白质交联的异官能团试剂。这些试剂在酸性氯基上与糖的伯羟基反应,在溴乙酰基上与蛋白质的氨基和咪唑基反应。甲基α-D-葡萄糖苷被选为模型糖,与这些试剂反应分别生成甲基 6-O-(N-溴乙酰胺基磺酰基)-α-D-葡萄糖苷和甲基 6-O-(对溴乙酰胺基苯甲酰基)-α-D-葡萄糖苷。这些糖衍生物在弱碱性 pH 下与牛血清白蛋白结合。在一个白蛋白分子中可以结合 10 种以上的糖衍生物。