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调查细胞毒性T-淋巴细胞抗原-4基因中非同名单核酸多态的功能和结构效应:一个in-silico研究

Md Mostafa Kamal¹, Kazi Fahmida Haque Shantanu², Shamiha Tabassum Teeya¹

¹Department of Nutrition and Food Technology, Jashore University of Science and Technology, Jashore, Bangladesh.

|January 24, 2025

概括

研究细胞毒性T淋巴细胞抗原-4 (CTLA4) 基因中的单核酸多态 (SNP) 揭示了这些遗传变异如何影响蛋白质稳定性和功能. 这项研究确定了特定的CTLA4 nsSNP,它们可能会改变免疫反应和疾病易感性.

科学领域:

免疫学免疫学免疫学
遗传学是一个遗传学.
计算生物学计算生物学

背景情况:

细胞毒性T淋巴细胞抗原-4 (CTLA4) 是T细胞活动的关键调节者.
了解CTLA4基因内遗传变异的影响,特别是单核酸多态 (SNP),对于免疫系统研究至关重要.

研究的目的:

在人类CTLA4基因中识别非同义SNP (nsSNP).
评估这些nsSNP对蛋白质稳定性,功能和潜在疾病相关性的影响.
分析CTLA4 nsSNP的分子动态和结构后果.

主要方法:

包括SIFT,PolyPhen-2,PROVEAN,SNAP,SNPs&GO,PhD SNP和PANTHER在内的生物信息工具被用于识别和验证有害的nsSNP.
使用mCSM和DynaMut2.2评估了蛋白质的稳定性.
进行分子动力学 (MD) 模拟以分析结构和功能变化.
为了探索基因相互作用,进行了网络分析 (GeneMANIA,STRING).

主要成果:

在3134个SNP中,有186个被确定为误解变体 (nsSNP).
几个nsSNP (例如,rs138279736,rs201778935) 预测是有害的,可能是有害的,并且与疾病相关.
发现突变降低了蛋白质稳定性 (ΔΔG) 并可能破坏蛋白质相互作用.
与野生类型相比,MD模拟显示突变CTLA4蛋白质的动态变化 (RMSD,RMSF,Rg,键,PCA).

结论:

在CTLA4基因中的特定nsSNP可以显著改变蛋白质结构,稳定性和功能.
这些变化可能会影响免疫调节,并导致人类疾病的发病.
建议进行进一步的实验验证,以确认这些nsSNP对疾病易感性的功能影响.

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