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突变对MUC1-C/ED蛋白稳定性和抗体结合的影响:结构洞察力

Dwipanjan Sanyal¹, Danny Muzata², Vladimir N Uversky³

¹XYone Therapeutics, Canton, MA, USA.

Biochemical and biophysical research communications

|June 11, 2025

概括

了解MUC1抗原突变是抗体-药物联合 (ADC) 癌症治疗的关键. 特定的MUC1突变影响抗体结合,影响ADC的有效性和稳定性.

科学领域:

生物化学生物化学
分子生物学分子生物学
在瘤学瘤学.

背景情况:

抗体-药物合物 (ADC) 是一种有前途的癌症治疗方法,利用单克隆抗体进行向药物输送.
MUC1是一种型蛋白和ADC发展的基抗原,3D1抗体特别结合其MUC1-C细胞外域.
包括MUC1-C在内的MUC1 SEA域对抗体相互作用至关重要.

研究的目的:

研究特定点突变 (D85E,V86A,T88A) 在MUC1 SEA域对3D1抗体结合亲和力和抗原稳定性的影响.
阐明这些MUC1突变引起的改变结合动态的基础分子机制.

主要方法:

使用计算方法分析形状变化和结合亲和力.
检查MUC1-C和3D1抗体界面上的静电,键和疏水相互作用.
计算局部丧和能量,以评估蛋白质稳定性.

主要成果:

突变D85E和T88A通过改变静电和结合相互作用,诱导了显著的形状变化和降低了结合亲和力.
突变V86A破坏了局部疏水性相互作用,降低了结合效率,同时保持了整体形状.
这三种突变 (D85E,V86A,T88A) 都增加了局部能量和丧,表明MUC1 SEA域稳定性降低.
MUC1的α3螺旋被确定为蛋白质稳定性和抗体相互作用的关键.

结论:

在MUC1 SEA域内的特定残留物对于维持有效的3D1抗体结合至关重要,因为它们有助于局部丧和稳定.
这些关键残留物的突变可以显著改变抗原结合动态,影响ADC的治疗潜力.
了解这些残留物特定相互作用对于设计和优化MUC1向的ADCs至关重要.

关键词:

抗体与药物联合体 (ADCs) 是一种抗体与药物联合体.挫折感挫折感挫折感无蛋白质建模的模型点位突变点位突变是指点位突变.蛋白稳定性抗体结合蛋白质稳定性抗体结合

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