A role for adaptor protein complex 1 in protein targeting to rhoptry organelles in Plasmodium falciparum
A role for adaptor protein complex 1 in protein targeting to rhoptry organelles in Plasmodium falciparum
复制标题
DOI：
10.1016/j.bbamcr.2014.12.030
复制
发表时间：
2015-03-01
影响因子：
5.1
通讯作者：
Malhotra, Pawan
中科院分区：
文献类型：
--
作者：
Kibria, K. M. Kaderi;Rawat, Khushboo;Malhotra, Pawan
The human malaria parasite Plasmodium falciparum possesses sophisticated systems of protein secretion to modulate host cell invasion and remodeling. In the present study, we provide insights into the function of the AP-1 complex in P. falciparum. We utilized GFP fusion constructs for live cell imaging, as well as fixed parasites in immunofluorescence analysis, to study adaptor protein mu1 (Pf mu 1) mediated protein trafficking in P. falciparum. In trophozoites Pf mu 1 showed similar dynamic localization to that of several Golgi/ER markers, indicating Golgi/ER localization. Treatment of transgenic parasites with Brefeldin A altered the localization of Golgi-associated Pf mu 1, supporting the localization studies. Co-localization studies showed considerable overlap of Pf mu 1 with the resident rhoptry proteins, rhoptry associated protein 1 (RAP1) and Cytoadherence linked asexual gene 3.1 (Clag3.1) in schizont stage. Immunoprecipitation experiments with Pf mu 1 and PfRAP1 revealed an interaction, which may be mediated through an intermediate transmembrane cargo receptor. A specific role for Pf mu 1 in trafficking was suggested by treatment with AlF4, which resulted in a shift to a predominantly ER-associated compartment and consequent decrease in co-localization with the Golgi marker GRASP. Together, these results suggest a role for the AP-1 complex in rhoptry protein trafficking in P. falciparum. (C) 2015 Elsevier B.V. All rights reserved.
