在Anpl-UAA中微多形态的作用对结构稳定性和呈现的影响
Ziche Tang1, Suqiu Wang1, Liubao Du1
1National Key Laboratory of Veterinary Public Health Security, Key Laboratory of Animal Epidemiology of the Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China.
International journal of biological macromolecules
|April 18, 2024
概括
在子主要基因相容性复合物I类 (MHC-I) 分子中的微聚合态,特别是在残留物62处,改变了结合和复合物的稳定性. 这一发现影响了对鸟类免疫反应和MHC-I演变的理解.
科学领域:
- 免疫遗传学 免疫遗传学
- 结构生物学 结构生物学
- 鸟类生物学 鸟类生物学
背景情况:
- 在主要基因相容性复合物I类 (MHC-I) 分子中的微聚合态极大地影响结和宿主免疫力.
- 一个带有 a 的鸟类.
- 最少必要的MHC是最少必要的MHC
- 表达模式表现出MHC-I变异的明显影响.
- 了解这些变异是鸟类疾病耐药性的关键.
研究的目的:
- 为了研究两个高度同源的MHC-I基因,Anpl-UAA*77和Anpl-UAA*78.7之间的差异性结的结构基础.
- 为了确定控制-MHC-I复合体 (pMHC-I) 稳定性的特定残留物和相互作用.
- 探索MHC-I多态性,pMHC-I稳定性和宿主生理学 (如体温) 之间的潜在联系.
主要方法:
- 对两种子MHC-I等位基因 (Anpl-UAA*77和Anpl-UAA*78) 的比较分析,它们具有不同的结合特性.
- 位点定向的突变发生,以探测特定残留物的功能.
- 使用流感衍生的 (AEV9) 对pMHC-I复合物的晶体分析.
主要成果:
- 在62位的关键残留物被确定为结槽内的结相互作用的关键调节者.
- 在62位置的调制显著改变了B口袋的特性和相邻螺旋区域的稳定性.
- 这些变化导致了-MHC-I复合物的结构和稳定性的实质性差异.
- 在Anpl-UAA的62位置的变化可能与子的体温和pAnpl-UAA稳定性相关.
结论:
- MHC-I中的残留物62在调节结合特异性和pMHC-I复合体稳定性方面发挥着关键作用.
- 在鸟类中,MHC-I微聚合物显著影响pMHC-I复合物的结构完整性和功能性质.
- 这些发现为鸟类免疫系统的进化适应提供了洞察力,可能将MHC-I变异与温度调节联系起来.
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