Membrane lipid composition protects Entamoeba histolytica from self-destruction by its pore-forming toxins.

Abstract:

:The protozoan parasite and human pathogen Entamoeba histolytica is protected against killing by its own lytic effector proteins. Amoebae withstand doses of amoebapores, their pore-forming polypeptides, that readily kill human Jurkat T cells. Moreover, the polypeptides do not bind to the amoebic surface membrane as evidenced by using fluorescently labelled amoebapores and confocal laser microscopy. Experiments employing liposomes as a minimalistic membrane system and the major isoform amoebapore A revealed that the lipid composition of amoebic membranes prevents binding of the cytolytic molecule and that both the phospholipid ingredients and the high content of cholesterol contributes to the protection of the toxin-producing cell.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Andrä J,Berninghausen O,Leippe M

doi

10.1016/S0014-5793(04)00324-2

keywords:

subject

Has Abstract

pub_date

2004-04-23 00:00:00

pages

109-15

issue

1-2

eissn

0014-5793

issn

1873-3468

pii

S0014579304003242

journal_volume

564

pub_type

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