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Angela Patterson¹, Kim Young¹, MacRyan P Biever²

¹Molecular and Cellular Biochemistry Department, Indiana University, Bloomington, IN, USA.

|September 14, 2024

概括

人类乳头瘤病毒 (HPV) L1体形成疫苗的病毒样颗粒. 组装产生异质的粒子大小,但这些粒子表现出统一的稳定性和成熟特性,揭示了复杂的组装路径.

科学领域:

生物化学生物化学
结构生物学结构生物学
病毒学病毒学

背景情况:

人类乳头瘤病毒 (HPV) 的L1合体组合成T=7的二元形体,形成对HPV疫苗至关重要的病毒样颗粒 (VLP).
了解HPV L1 VLP组装对于疫苗开发和改善生产至关重要.
组装过程和由此产生的不同条件下的粒子特性需要进一步研究.

研究的目的:

在不同的条件下 (pH,氧化,离子强度) 调查HPV16 L1体的组装途径.
描述组装的HPV16VLP的大小和稳定性的异质性.
探索囊氧化对VLP稳定性和成熟性的影响.

主要方法:

使用批量和单颗粒技术来分析HPV16 L1体组件.
检查了对不同pH值,温和氧化剂和离子强度的反应中的粒子形成.
通过解离,热展开和蛋白质酶消化试验评估粒子特性.

主要成果:

通过HPV16 L1体组合,产生了密闭的球形颗粒的异质混合物,直径为20至70纳米.
尽管尺寸异质,但组装的粒子对解离,热展开和蛋白质酶消化表现出均的反应,表明随着时间的推移成熟.
氨酸氧化稳定了早期的粒子,但没有改变热稳定性或蛋白酶敏感性等一般特征.

结论:

HPV16 L1 VLP组件涉及复杂的途径,导致大小异质的粒子具有动力可访问的能量最小值.
组装的VLP虽然尺寸不同,但具有一致的生物物理特性和成熟动力学.
氨酸氧化可以影响早期的VLP稳定性,突出了疫苗生产的潜在调制策略.

关键词:

卡普西德 (Capsid) 是一种状的鱼.检测电荷的质谱仪.在HPV16中,HPV16是最重要的.人类乳头瘤病毒人类乳头瘤病毒.电阻脉冲传感器可以检测到电阻脉冲.自动组装自动组装

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