A process for the production of a glycoconjugate by N-glycosylation of a protein or peptide comprising the sequence D/E-X-N-X-S/T, wherein each X is the same or different and is any natural amino acid other than proline, wherein the process comprises reacting the protein or peptide with a polyisoprenyl pyrophosphate of formula (I), or a salt thereof, in the presence of PglB: (I) to produce the glycoconjugate comprising the protein or peptide having a saccharide [SI] linked to the asparagine in the sequence D/E-X-N-X-S/T. Polyisoprenylpyrophosphates used as substrates in the biocatalytic process are also provided, as well as certain glycoconjugates.
一种通过蛋白质或肽的N-糖基化制备糖蛋白的方法,所述蛋白质或肽包括序列D/E-X-N-X-S/T,其中每个X相同或不同,是任何天然
氨基酸,但不包括脯
氨酸,该方法包括将蛋白质或肽与式(I)的聚
异戊二烯基
焦磷酸盐或其盐在PglB的存在下反应,以产生包含与序列D/E-X-N-X-S/T中的
天冬氨酸连接的糖蛋白。还提供了作为
生物催化过程中底物使用的聚
异戊二烯基
焦磷酸盐,以及某些糖蛋白。