[16型HPV的E6和E7蛋白中的氨基酸替代模式:植物地理和进化]
E E Zelenova1,2,3, A A Karlsen4, D V Avdoshina5
1Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991 Russia.
Molekuliarnaia biologiia
|December 22, 2024
概括
高风险人类乳头瘤病毒 (HR HPV) E6和E7蛋白显示出地理变异性,具有与族群和HLA等位基因相关的独特氨基酸替代. 这影响了B细胞和T细胞表皮图的识别,影响了表皮图漂移和疫苗开发.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 高风险的人类乳头瘤病毒 (HR HPVs),特别是HPV16型 (HPV16),是致癌的.
- E6和E7瘤蛋白是HPV诱导瘤发生的关键.
- 关于这些型蛋白的可变性和影响它的因素的数据有限.
研究的目的:
- 分析HPV16E6和E7蛋白序列的地理变异性.
- 调查影响蛋白质变异性的因素,包括地理起源和演变.
- 识别独特的氨基酸替代物及其与免疫反应和种族群体的潜在关系.
主要方法:
- 从GenBank下载并过了3651个HPV16 E6和4578个E7核酸序列.
- 用MEGA11,R和其他生物信息学工具将序列转换为氨基酸序列进行分析.
- 进行了遗传学和共变性分析,按地理来源分层.
主要成果:
- 在E6 (17, 21, 32, 85, 90) 和E7 (28, 29, 51, 77) 中确定了高度可变的氨基酸位置.
- 在特定国家/族群的E6/E7蛋白中发现了独特的氨基酸替代,通常位于B细胞和T细胞表位.
- 发现了替代物,HLA等位基因和区域表位漂移之间的潜在联系;E6序列显示区域聚类,与E7.7不同.
结论:
- 地理来源显著影响HPV16 E6/E7蛋白质的变异性.
- 氨基酸替代可能与种族和HLA类型有关,影响免疫识别.
- 这些发现对于开发针对高风险HPV感染的通用治疗疫苗至关重要.
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