申请人:University of Maryland Baltimore, Office of Commercial Ventures and Intellectual Property
公开号:US07807405B2
公开(公告)日:2010-10-05
A chemoenzymatic method for the preparation of a homogeneous glycoprotein or glycopeptide, including (a) providing an acceptor selected from the group consisting of GlcNAc-protein and GlcNAc-peptide; and (b) reacting the acceptor with a donor substrate including an activated oligosaccharide moiety, in the presence of a catalyst comprising endoglycosidase (ENGase), to transfer the oligosaccharide moiety to the acceptor and yield the homogeneous glycoprotein or glycopeptide. The donor substrate includes, in a specific implementation, a synthetic oligosaccharide oxazoline. A related method of glycoprotein or glycopeptide remodeling with a predetermined natural N-glycan or a tailor-made oligosaccharide moiety, and a method of remodeling an antibody including a heterogeneous sugar chain, are also described. The disclosed methodology enables glycoprotein drugs to be modified for prolonged half-life in vivo, reduced immunogenicity, and enhanced in vivo activity, and for targeting and drug delivery.
一种化学酶法制备均质糖蛋白或糖肽的方法,包括(a)提供选择自GlcNAc-蛋白质和GlcNAc-肽的受体;以及(b)在内切酶(ENGase)催化剂的存在下,将含有活性寡糖基团的供体底物与受体反应,将寡糖基团转移至受体并产生均质糖蛋白或糖肽。在特定实施方案中,供体底物包括合成的寡糖氧唑。还描述了一种利用预定的天然N-糖基或定制的寡糖基团进行糖蛋白或糖肽重塑的相关方法,以及一种包括异质糖链的抗体重塑方法。所披露的方法使得糖蛋白药物能够被修改,以实现在体内的延长半衰期、减少免疫原性、增强在体内活性以及用于靶向和药物传递。