Synthesis and Evaluation of Three Azide-Modified Disaccharide Oxazolines as Enzyme Substrates for Single-Step Fc Glycan-Mediated Antibody-Drug Conjugation
作者:Xiao Zhang、Chong Ou、Huiying Liu、Lai-Xi Wang
DOI:10.1021/acs.bioconjchem.2c00142
日期:2022.6.15
reported that azide-functionalized disaccharide oxazolines of the Manβ1,4GlcNAc core were an efficient substrate of wild-type endoglycosidase Endo-S2 for Fc glycan remodeling and conjugation. In this paper, we report the synthesis and evaluation of new disaccharide oxazolines as enzyme substrates for examining the scope of the site-specific conjugation. Thus, azide-functionalized disaccharide oxazolines
抗体药物偶联物 (ADC) 在靶向癌细胞杀伤方面具有广阔前景。位点特异性抗体-药物偶联对于合成具有最佳安全性和高效性的均质 ADC 是非常理想的。我们最近报道了 Man β 1,4GlcNAc 核心的叠氮基官能化二糖恶唑啉是野生型内切糖苷酶 Endo-S2 的有效底物,用于 Fc 聚糖重塑和缀合。在本文中,我们报告了新的二糖恶唑啉作为酶底物的合成和评估,以检查位点特异性缀合的范围。因此,衍生自 Man β 1,4GlcNAc、Glc β 1,4GlcNAc 和 Gal β的叠氮基官能化二糖恶唑啉合成了 1,4GlcNAc (LacNAc)。酶促评估表明,野生型 Endo-S2 表现出高度松弛的底物特异性,并且可以容纳所有三种类型的二糖衍生物进行转糖基化,以提供位点特异性叠氮化物标记抗体,这些抗体很容易与有效负载点击以生成同质 ADC。此外,我们还发现 Endo-S2 能够容纳药物预加载的最