人类CXCR4基因的高风险编码和非编码单核酸多态的全面描述
Bonoshree Sarkar1, Muhammad Safiul Alam Mondal1, Taibur Rahman1
1Infection Biology Laboratory, Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka, Bangladesh.
PloS one
|December 23, 2024
概括
这项研究通过计算分析了CXCR4基因变异,确定了23种有害的nsSNP和5种影响基因调节的非编码SNP. H113P突变显著影响蛋白质功能和带结合,为疾病易感性提供了洞察力.
科学领域:
- 遗传学和分子生物学
- 计算生物学 计算生物学
- 生物化学 生物化学
背景情况:
- CXCR4受体 (Fusin/CD184) 对于HIV的进入和细胞过程至关重要,其失调与包括癌症在内的各种病理有关.
- 在CXCR4基因中,基因变异,特别是单核酸多态 (SNP),可以改变其功能并导致疾病的发展.
- 了解这些SNP的分子影响对于破译疾病机制和开发向疗法至关重要.
研究的目的:
- 在CXCR4基因中计算调查易受疾病感染的生殖系错误和非编码SNP的分子效应.
- 预测nsSNP的致病性及其对蛋白质稳定性和结构的影响.
- 评估非编码SNP对基因表达和miRNA结合的调控潜力.
主要方法:
- 使用了一套生物信息学工具 (SIFT,PROVEAN,PolyPhen-2等) 对于 nsSNP 病原性预测.
- 使用I-mutant 3.0,MUpro,Consurf,TM-align和PyMOL等工具评估了蛋白质的稳定性,保存和结构变化.
- 进行了分子对接和MD模拟,以评估对蛋白质-连接体相互作用的功能影响.
- 分析了UTR区域的非编码SNP对miRNA结合和基因表达的调节作用,使用PolymiRTS和RegulomeDB.
主要成果:
- 在CXCR4基因中确定了23种有害和致病的nsSNP,其中5种 (G55V,H79P,L80P,H113P,P299L) 显示出显著的结构变化.
- 这种H113P变体对蛋白质 - 配体结合亲和力和蛋白质稳定性产生了重大影响,这是分子对接和MD模拟所证明的.
- 在3'-UTR中发现了5个非编码SNP,能够破坏或创建miRNA结合点,以及UTR和内基区域的其他调节变异.
结论:
- 在CXCR4的生殖系遗传变异可能导致有害的功能后果,影响蛋白质的稳定性,结构和连接体结合.
- 特定的nsSNP,如H113P,以及影响调控元素的非编码SNP,与改变的CXCR4功能和潜在的疾病易感性密切相关.
- 这种计算分析为CXCR4遗传变异的功能影响提供了宝贵的见解,可能为CXCR4相关疾病的未来治疗策略提供指导.
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