Intracellular bacterial pathogens of a diverse nature share the ability to evade host immunity by impairing trafficking of endocytic cargo to lysosomes for degradation, a process that is poorly understood. Here, we show that the Salmonella enterica t ...
Intracellular bacterial pathogens of a diverse nature share the ability to evade host immunity by impairing trafficking of endocytic cargo to lysosomes for degradation, a process that is poorly understood. Here, we show that the Salmonella enterica type 3 secreted effector SopD2 mediates this process by binding the host regulatory GTPase Rab7 and inhibiting its nucleotide exchange. Consequently, this limits Rab7 interaction with its dynein- and kinesin-binding effectors RILP and FYCO1 and thereby disrupts host-driven regulation of microtubule motors. Our study identifies a bacterial effector capable of directly binding and thereby modulating Rab7 activity and a mechanism of endocytic trafficking disruption that may provide insight into the pathogenesis of other bacteria. Additionally, we provide a powerful tool for the study of Rab7 function, and a potential therapeutic target.
Organizational Affiliation:
Department of Molecular Genetics, University of Toronto, ON M5S 1A8, Canada.,Cell Biology Program, Hospital for Sick Children, Toronto, ON M5G 1X8, Canada.,Cell Biology Program, Hospital for Sick Children, Toronto, ON M5G 1X8, Canada; Department of Biochemistry, University of Toronto, ON M5S 1A8, Canada; Institute of Medical Science, University of Toronto, ON M5S 1A8, Canada.,Département de Biochimie, de Microbiologie et de Bio-informatique, PROTEO et IBIS, Université Laval, Québec City, QC G1V 0A6, Canada.,Department of Biochemistry, McGill University, Montreal, QC H3G 0B1, Canada.,Department of Chemistry and Biochemistry, Concordia University, Montreal, QC H4B 1R6, Canada.,Cell Biology Program, Hospital for Sick Children, Toronto, ON M5G 1X8, Canada; Department of Molecular Genetics, University of Toronto, ON M5S 1A8, Canada; Institute of Medical Science, University of Toronto, ON M5S 1A8, Canada; Sickkids IBD Centre, Hospital for Sick Children, Toronto, ON M5G 1X8, Canada. Electronic address: john.brumell@sickkids.ca.,Department of Biochemistry, McGill University, Montreal, QC H3G 0B1, Canada; Department of Biochemistry, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada.
Download Mendeley
Download Endnote
