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UT Southwestern researchers identify novel mechanism that helps stomach bug cause illness
Date:7/28/2013

adding that the researchers found that VopQ's channel activity turned off autophagy.

"During infection, VopQ is injected into the host cell where the protein binds to a lysosomal membrane protein and forms small pores, all within minutes of infection. The resulting complex of proteins causes ions to leak and the lysosomes to de-acidify. Lacking acidification, lysosomes cannot degrade the unneeded cellular components and autophagy is disrupted," Ms. Sreelatha said.

Dr. Orth said "Bacterial pathogens have evolved a number of ways to target and manipulate host cell signaling; the ability of VopQ to form a gated ion channel and to inhibit autophagy represents a novel mechanism."

Further characterization of the mechanism by which VopQ sabotages cells to disrupt autophagy may lead to a better understanding of host-pathogen interactions as well as advance our understanding of the pathway, eventually leading to new treatments for diseases in which autophagy has gone awry, they noted.


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Contact: Deborah Wormser
deborah.wormser@utsouthwestern.edu
214-648-3404
UT Southwestern Medical Center
Source:Eurekalert

Page: 1 2

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