在疟疾寄生虫细胞铁代谢所需的双价金属载体的鉴定
Kade M Loveridge1, Paul A Sigala1
1Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT 84112.
概括
疟疾寄生虫Plasmodium falciparum通过位于食物真空中的PfDMT1载体获得必需的铁. 针对这种铁吸收机制是一种潜在的抗疟疾策略.
科学领域:
- 疟疾学 疟疾学
- 分子寄生虫学 分子寄生虫学
- 铁的代谢 铁的代谢
背景情况:
- 疟疾寄生虫 (Plasmodium falciparum) 感染人类红细胞 (RBC),这是一个丰富的铁来源.
- 在P. falciparum中获得铁的机制仍然不太清楚.
- 寄生虫消化血红蛋白,释放血红素,但缺乏血红素氧酶来提取铁.
研究的目的:
- 调查一个假定的铁运输体,P. falciparum双价金属运输体1 (PfDMT1) 在红细胞感染期间获得铁的作用.
- 确定疟疾寄生虫中PfDMT1的局部化和功能.
主要方法:
- 对PfDMT1.1.的遗传学分析.
- 使用蛋白质标记和显微镜进行局部化研究.
- 在PfDMT1表达的有条件淘汰中.
- 用外源铁补充的救援实验.
主要成果:
- PfDMT1具有保留的金属运输特征,并且局部存在于食物真空膜中.
- 条件下击败PfDMT1是致命的,导致依赖铁的细胞缺陷.
- 寄生虫通过补充铁来拯救,证实了PfDMT1在铁吸收中的作用.
结论:
- 在血液阶段的疟疾寄生虫中,pfdmt1充当了必需铁的获取门卫.
- 向PfDMT1是一个有希望的抗疟疾治疗策略.
相关概念视频
The Early Endosome: Endocytosis of Transferrin
3.2K
Essential proteins such as insulin or low-density lipoprotein (LDL) and micronutrients such as iron enter a eukaryotic cell through receptor-mediated endocytosis. Subsequently, the early endosomes fuse with the vesicles containing such receptor-ligand complexes and play a vital role in sorting the incoming ligands and receptors. While the ligands are either degraded inside the vesicle or released into the cytosol, their receptors are returned to the plasma membrane for further rounds of...
3.2K
The Significance of Membrane Transport
23.9K
The transport of solutes across the cell membrane is essential for metabolic processes, like maintaining cell size and volume, generating the action potential, exchanging nutrients and gases, etc. Membrane transport can be either passive or active. It can be simple diffusion, facilitated, or mediated transport aided by transport proteins such as transporters and channels.
Transporters facilitate either an active or passive movement of solutes. They can allow a single-molecule transport down its...
Transporters facilitate either an active or passive movement of solutes. They can allow a single-molecule transport down its...
23.9K
ABC Transporters: Exporter
4.2K
ATP-binding cassette or ABC transporter is the largest superfamily of integral membrane proteins. The transporters have transmembrane-binding domains (TMDs) and nucleotide-binding domains (NBDs). The TMDs are specific to their substrates, whereas the NBDs are similar to engines that complete ATP hydrolysis to complete the substrate transport. They can be full transporters consisting of two TMDs and NBDs, half transporters with one TMD and NBD, while some encoded with a single TMD or NBD are...
4.2K


