PLEKHM1 regulates Salmonella-containing vacuole biogenesis and infection
Department of Cell and Developmental Biology
Biochemistry | Cell and Developmental Biology
The host endolysosomal compartment is often manipulated by intracellular bacterial pathogens. Salmonella (Salmonella enterica serovar Typhimurium) secrete numerous effector proteins, including SifA, through a specialized type III secretion system to hijack the host endosomal system and generate the Salmonella-containing vacuole (SCV). To form this replicative niche, Salmonella targets the Rab7 GTPase to recruit host membranes through largely unknown mechanisms. We show that Pleckstrin homology domain-containing protein family member 1 (PLEKHM1), a lysosomal adaptor, is targeted by Salmonella through direct interaction with SifA. By binding the PLEKHM1 PH2 domain, Salmonella utilize a complex containing PLEKHM1, Rab7, and the HOPS tethering complex to mobilize phagolysosomal membranes to the SCV. Depletion of PLEKHM1 causes a profound defect in SCV morphology with multiple bacteria accumulating in enlarged structures and significantly dampens Salmonella proliferation in multiple cell types and mice. Thus, PLEKHM1 provides a critical interface between pathogenic infection and the host endolysosomal system.
DOI of Published Version
Cell Host Microbe. 2015 Jan 14;17(1):58-71. doi: 10.1016/j.chom.2014.11.011. Link to article on publisher's site.
Cell host and microbe
McEwan DG, Odgren PR, Bumann D, Dikic I. (2015). PLEKHM1 regulates Salmonella-containing vacuole biogenesis and infection. Cell and Developmental Biology Publications. https://doi.org/10.1016/j.chom.2014.11.011. Retrieved from https://escholarship.umassmed.edu/cellbiology_pp/141