脱糖化诱导了曼诺酶受体CD206的新型远端构造
Guadalupe Alvarez1, Santiago Di Lella2, Monica Pickholz3,4
1Instituto de Ciencias Fisicas, Universidad Nacional de San Marftin (UNSAM) y CONICET, 25 de Mayo y Francia, 1650, Buenos Aires, Argentina.
Scientific reports
|January 14, 2026
概括
从曼诺斯受体CD206 (曼诺斯受体C型1) 中去除N-甘氨酸会改变它的结构和结合. 脱糖化揭示了新的结合点,并削弱了连接体保留,影响了免疫识别.
科学领域:
- 结构生物学是结构生物学.
- 免疫学 免疫学 免疫学
- 葡萄糖生物学 葡萄糖生物学
背景情况:
- 蛋白质上的N-甘氨酸可以显著影响蛋白质的结构,动态和功能.
- 曼诺糖受体CD206 (曼诺糖受体C型1) 是先天免疫的一个关键性莱克丁,但其完整的结构和动态特征缺乏.
- 在包括癌症在内的各种病理条件中观察到改变的糖化模式.
研究的目的:
- 综合描述N-甘氨酸去除对曼诺酸受体CD206.6的结构和动态后果.
- 为了研究脱糖化如何影响CD206.6的结构格局和配体结合性质.
- 探索这些变化对免疫识别和潜在的治疗向的影响.
主要方法:
- 原子学分子动力学模拟.
- 通过AlphaFold预测CD206.6的全长模型.
- 主要组件和正常模式分析.
- 使用天然配体和的功能性结合试验.
主要成果:
- 脱糖化CD206允许进入CTLD7-8域中的新形状状状态,与糖化形式的凸状状态不同.
- 糖化限制了受体的灵活性,并减少了形状采样,而脱糖化允许更大的灵活性.
- 脱糖化减弱了诸如α-D-mannopyranoside (MMA) 这样的正规配体的结合,并暴露了以前被屏蔽的相互作用部位.
- 在脱糖化过程中暴露了新的相互作用部位,包括通常被甘氨酸遮蔽的区域.
结论:
- 移除N-甘氨酸显著重塑了CD206.6的构造和结合格局.
- 正如在疾病中观察到的,改变的糖基化可以调节CD206功能和免疫细胞相互作用.
- 这些发现提供了关于CD206在免疫力中的作用的见解,并建议治疗干预的潜在途径,以向依赖糖化酶的功能.
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