The present invention relates to a chemically modified mutant protein including a cysteine residue substituted for a residue other than cysteine n a precursor protein, the substituted cysteine residue being subsequently modified by reacting the cysteine residue with a glycosylated thiosulfonate. Also a method of producing the chemically modified mutant protein is provided. The present invention also relates to a glycosylated methanethiosulfonate. Another aspect of the present invention is a method of modifying the functional characteristics of a protein including providing a protein and reacting the protein with a glycosylated methanethiosulfonate reagent under conditions effective to produce a glycoprotein with altered functional characteristics as compared to the protein. In addition, the present invention relates to methods of determining the structure-function relationships of chemically modified mutant proteins. The present invention also relates to synthetic methods for producing thio-glycoses, the thio-glycoses so produced, and to methods for producing glycodendrimer reagents.
本发明涉及一种
化学修饰的突变蛋白,其中包括将半胱
氨酸残基替换为前体蛋白中的其他残基,所替换的半胱
氨酸残基随后通过与糖基化
硫代
磺酸盐反应而被修饰。还提供了一种生产该
化学修饰的突变蛋白的方法。本发明还涉及一种糖基化的
甲烷硫代
磺酸盐。本发明的另一个方面是一种修改蛋白的功能特性的方法,包括提供蛋白并将蛋白与糖基化的
甲烷硫代
磺酸盐试剂在有效条件下反应,以产生具有与蛋白相比改变的功能特性的糖蛋白。此外,本发明涉及确定
化学修饰的突变蛋白的结构-功能关系的方法。本发明还涉及用于产生
硫代糖的合成方法,以及所产生的
硫代糖,以及用于产生糖基树状聚合物试剂的方法。