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与马来酰亚胺迅速反应,能位点特异性修饰抗体的非标准氨基酸
N6-[(螺[2.4]庚-4,6-二烯-1-基甲氧基)羰基]-L-赖氨酸(1)可用于制备位点特异性修饰的抗体偶联药物(ADC)1)。通过遗传密码扩展,在蛋白质特定位点导入的1的螺庚二烯(SCp)部分,通过Diels-Alder反应以1.8-5.4 M-1 s-1的速度与马来酰亚胺部分选择性结合2)。以抗体作为蛋白质,使其与药物结合的马来酰亚胺反应生成的ADC,在小鼠血清和体内表现出比半胱氨酸-马来酰亚胺结合物更好的稳定性。
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