Independent Roles of Apical Membrane Antigen 1 and Rhoptry Neck Proteins during Host Cell Invasion by Apicomplexa
نویسندگان
چکیده
منابع مشابه
Apical organelles and host-cell invasion by Apicomplexa.
Host-cell invasion by apicomplexan parasites involves the successive exocytosis of three different secretory organelles; namely micronemes, rhoptries and dense granules. The findings of recent studies have extended the structural homologies of each set of organelles between most members of the phylum and suggest shared functions of each set. Micronemes are apparently used for host-cell recognit...
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Apicomplexan parasites invade host cells by forming a ring-like junction with the cell surface and actively sliding through the junction inside an intracellular vacuole. Apical membrane antigen 1 is conserved in apicomplexans and a long-standing malaria vaccine candidate. It is considered to have multiple important roles during host cell penetration, primarily in structuring the junction by int...
متن کاملA role for apical membrane antigen 1 during invasion of hepatocytes by Plasmodium falciparum sporozoites.
Plasmodium sporozoites are transmitted through the bite of infected mosquitoes and invade hepatocytes as a first and obligatory step of the parasite life cycle in man. Hepatocyte invasion involves proteins secreted from parasite vesicles called micronemes, the most characterized being the thrombospondin-related adhesive protein (TRAP). Here we investigated the expression and function of another...
متن کاملInteraction between Plasmodium falciparum Apical Membrane Antigen 1 and the Rhoptry Neck Protein Complex Defines a Key Step in the Erythrocyte Invasion Process of Malaria Parasites*
Invasion of host cells by apicomplexan parasites, including Plasmodium falciparum and Toxoplasma gondii, is a multistep process. Central to invasion is the formation of a tight junction, an aperture in the host cell through which the parasite pulls itself before settling into a newly formed parasitophorous vacuole. Two protein groups, derived from different secretory organelles, the micronemal ...
متن کاملPlasmodium falciparum AMA1 binds a rhoptry neck protein homologous to TgRON4, a component of the moving junction in Toxoplasma gondii.
Plasmodium falciparum apical membrane antigen 1 (PfAMA1) coimmunoprecipitates with the Plasmodium homologue of TgRON4, a secreted rhoptry neck protein of Toxoplasma gondii that migrates at the moving junction in association with TgAMA1 during invasion. PfRON4 also originates in the rhoptry necks, suggesting that this unusual collaboration of micronemes and rhoptries is a conserved feature of Ap...
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ژورنال
عنوان ژورنال: Cell Host & Microbe
سال: 2011
ISSN: 1931-3128
DOI: 10.1016/j.chom.2011.10.012