Two isotypes of phosphatidylinositol 3-phosphate-binding sorting nexins play distinct roles in trogocytosis in Entamoeba histolytica.

ABSTRACT: Phosphatidylinositol phosphates (PIPs) function as important second messengers in many cellular events. In the human intestinal protist Entamoeba histolytica, where phagocytosis/trogocytosis plays an indispensable role in proliferation and pathophysiology during infection, various PIPs are involved in multiple steps of phago/trogocytosis. PI3-phosphate (PI3P) plays a pivotal role in the biogenesis of phagosome/trogosomes via recruitment of PI3P effectors. Because no known PI3P downstream effectors are conserved in E. histolytica, we exploited a unique method to identify the proteins PI3P dependently recruited to phagosomes. We rationalised that overexpression of PI3P-binding GFP-HrsFYVE competes for PI3P on phagosomal membranes and results in dissociation of PI3P effectors from phagosomes.

SUBMITTER: Watanabe N 

PROVIDER: S-EPMC7027479 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature