相关实验视频

Updated: May 30, 2025

Selection of Plasmodium falciparum Parasites for Cytoadhesion to Human Brain Endothelial Cells

Selection of Plasmodium falciparum Parasites for Cytoadhesion to Human Brain Endothelial Cells

Published on: January 3, 2012

青杆菌 (Plasmodium falciparum) 的CyRPA糖结合不能解释对人类的适应性

Paul M Sharp^1,2, Frederic Bibollet-Ruche^3,4, Beatrice H Hahn^3,4

¹Institute of Ecology and Evolution, University of Edinburgh, Edinburgh, UK.

Genome biology and evolution

|January 26, 2025

概括

疟疾寄生虫Plasmodium falciparum可能已经适应感染人类之前从大猩猩的祖先,Plasmodium praefalciparum进化. 在P. falciparum和P. praefalciparum中,关键结合蛋白与人类细胞表面甘氨酸具有相似的亲和关系.

科学领域:

进化生物学是进化的生物学.
寄生虫学的寄生虫学
葡萄糖生物学葡萄糖生物学

背景情况:

人类疟疾寄生虫Plasmodium falciparum被认为是从感染大猩猩的祖先Plasmodium praefalciparum进化而来的.
人类和猿类之间存在红细胞表面酸的差异,影响了寄生虫的结合.
富含囊蛋白的Plasmodium falciparum保护性抗原 (PfCyRPA) 结合了人类的糖体,用于红细胞的入侵.

研究的目的:

为了研究Plasmodium falciparum对人类宿主的进化适应.
确定PfCyRPA中特定氨基酸变化的作用在糖结合特异性的作用.

主要方法:

在Plasmodium falciparum和Plasmodium praefalciparum之间对PfCyRPA蛋白序列的比较分析.
在PfCyRPA的糖结合部位内和附近检查氨基酸残留物.

主要成果:

在PfCyRPA中,氨基酸位154和209在P. falciparum和P. praefalciparum之间是相同的.
这些关键部位,以前认为赋予人类特定的结合,显示没有差异.
两种寄生虫之间在PfCyRPA甘氨酸结合部位或附近没有发现其他显著差异.

结论:

祖先的大猩猩寄生虫,P. praefalciparum,可能已经具备了先前存在的适应性,可以结合人类的sialoglycans.
P. falciparum向人类的进化可能不仅仅取决于PfCyRPA.中确定的氨基酸变化.
这表明疟疾寄生虫适应新宿主的一个更复杂的进化途径.

关键词:

这就是CyRPAPA.一个复杂的pfPCRCR复合体.横向基因转移是指水平基因转移.宿主适应宿主适应疟疾疟疾是一种疾病.动物性疾病是动物性疾病.

更多相关视频

A Simple Protocol for Platelet-mediated Clumping of Plasmodium falciparum-infected Erythrocytes in a Resource Poor Setting

A Simple Protocol for Platelet-mediated Clumping of Plasmodium falciparum-infected Erythrocytes in a Resource Poor Setting

Published on: May 16, 2013

Plasmodium falciparum Gametocyte Culture and Mosquito Infection Through Artificial Membrane Feeding

Plasmodium falciparum Gametocyte Culture and Mosquito Infection Through Artificial Membrane Feeding

Published on: July 3, 2020

相关概念视频

Symbiosis

Symbiosis

Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...

Glycocalyx and its Functions

Glycocalyx and its Functions

The glycocalyx is a carbohydrate-rich, fuzzy-appearing layer on the outer surface of the cell membrane. It is highly hydrophilic, because of this it attracts large amounts of water to the cell's surface. This aids the cell's interaction with the watery environment and also helps it to obtain substances dissolved in the water. It is also important for cell identification, self/non-self determination, and embryonic development and is used in cell-to-cell attachments to form tissues.