疟疾疫苗候选人膜抗原1的晶体结构
Juan Carlos Pizarro1, Brigitte Vulliez-Le Normand, Marie-Laure Chesne-Seck
1Unité d'Immunologie Structurale, Centre National de la Recherche Scientifique, URA 2185, Institut Pasteur, 25 rue du Docteur Roux, 75724 Paris, France.
Science (New York, N.Y.)
|February 26, 2005
概括
疟疾疫苗候选人阿皮卡膜抗原1 (AMA1) 结构揭示了一个受体结合功能,这对于寄生虫Plasmodium的入侵至关重要. 这一发现有助于开发新的疟疾疫苗和药物.
科学领域:
- 结构生物学是结构生物学.
- 寄生虫学的寄生虫学
- 疫苗学 疫苗学 疫苗学
背景情况:
- 皮膜抗原1 (AMA1) 是一个关键的等离子体蛋白质,对宿主细胞入侵至关重要,也是疟疾疫苗的领先候选者.
- 在入侵过程中AMA1的精确分子功能在很大程度上是未知的.
研究的目的:
- 通过确定其外质区域的晶体结构来阐明AMA1的分子功能.
- 调查AMA1在宿主细胞入侵中的作用,并为疫苗和药物设计提供信息.
主要方法:
- 使用X射线晶体学,以1.8安格斯特罗姆分辨率解决来自Plasmodium vivax的AMA1外质区域的晶体结构.
- 来自P. falciparum ortholog的侵袭抑制单克隆抗体表位被映射到P. vivax AMA1结构上并模拟.
主要成果:
- 晶体结构显示AMA1的I和II域属于PAN动机超级家族,已知用于受体结合.
- 对抗体表位的映射和PAN域结构-功能关系的分析表明,在入侵期间,域II在受体结合中起着关键作用.
结论:
- 结构和功能数据强烈表明,在Plasmodium入侵期间AMA1的受体结合作用,域II是关键的.
- 这些发现为了解AMA1功能提供了结构基础,并将促进设计更有效的疟疾疫苗和治疗方法.
相关概念视频
01:10Antibody Structure
Overview
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains
Antibodies consist of four polypeptide chains: two identical heavy...
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains
Antibodies consist of four polypeptide chains: two identical heavy...
01:10Antibody Structure
Overview
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains
Antibodies consist of four polypeptide chains: two identical heavy...
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains
Antibodies consist of four polypeptide chains: two identical heavy...