凯尔奇13区间包含疟疾寄生虫中高度分离的囊泡贩运蛋白
Sabine Schmidt1, Jan Stephan Wichers-Misterek1, Hannah Michaela Behrens1
1Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany.
PLoS pathogens
|December 1, 2023
概括
凯尔奇13 (K13) 蛋白中的单个氨基酸变化降低了Plasmodium falciparum寄生虫对艺术素药物的敏感性. 这项研究确定了参与宿主细胞细胞醇吸收的新的K13区块蛋白,影响药物耐药性和寄生虫入侵.
科学领域:
- 疟疾学 疟疾学
- 寄生虫学的寄生虫学
- 分子生物学分子生物学
背景情况:
- 在Plasmodium falciparum Kelch13 (K13) 蛋白质中单个氨基酸的变化会对艺术素衍生物 (ART) 产生抗性.
- K13和相关蛋白质形成了参与宿主细胞细胞醇吸收 (HCCU) 的区间,这是与ART敏感性相关的过程.
- 对于K13组件和HCCU的精确机制和蛋白质组成的了解仍然很少.
研究的目的:
- 为了进一步定义K13区的蛋白质组成.
- 调查新发现的K13区块蛋白在内分细胞和素敏感性中的功能作用.
- 探索K13区块蛋白在寄生虫发育和入侵中的参与.
主要方法:
- 生物ID分析以确定K13相互作用蛋白.
- 功能性测试,以评估内分细胞和素敏感性.
- 分析蛋白质域和进化适应的AlphaFold2结构预测.
- 基因分析以确定寄生虫无性血液中的蛋白质功能,发育阶段和入侵.
主要成果:
- 确定了MyoF,MCA2,Kelch13相互作用候选物 (KIC) 11和KIC12作为K13组件的组成部分.
- 在K13区内的蛋白质经常具有囊泡贩运和内细胞突变领域,与素抗性或内细胞突变功能相关联.
- 一种对无性血液发育阶段至关重要的新型K13区块蛋白被确定并与寄生虫入侵有关,独立于内细胞分裂或ART易感性.
- 在K13区内蛋白质中,异常的域组合和寄生虫特异区域表明,内细胞分裂的显著分类型特异性适应.
结论:
- 这项研究扩大了K13区内的已知的蛋白质谱,加强了其在内细胞分裂中的作用.
- 这些发现突显了疟疾寄生虫内细胞结合的显著进化适应,影响了阿尔特米西宁药物的疗效.
- 发现了参与寄生虫入侵和无性血液发育阶段的新型K13区块蛋白,为疟疾控制提供了新的点.
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