National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
United States
Welch Foundation
United States
Citation
Journal: Nat Struct Mol Biol / Year: 2020 Title: A distinct inhibitory mechanism of the V-ATPase by Vibrio VopQ revealed by cryo-EM. Authors: Wei Peng / Amanda K Casey / Jessie Fernandez / Emily M Carpinone / Kelly A Servage / Zhe Chen / Yang Li / Diana R Tomchick / Vincent J Starai / Kim Orth / Abstract: The Vibrio parahaemolyticus T3SS effector VopQ targets host-cell V-ATPase, resulting in blockage of autophagic flux and neutralization of acidic compartments. Here, we report the cryo-EM structure of ...The Vibrio parahaemolyticus T3SS effector VopQ targets host-cell V-ATPase, resulting in blockage of autophagic flux and neutralization of acidic compartments. Here, we report the cryo-EM structure of VopQ bound to the V subcomplex of the V-ATPase. VopQ inserts into membranes and forms an unconventional pore while binding directly to subunit c of the V-ATPase membrane-embedded subcomplex V. We show that VopQ arrests yeast growth in vivo by targeting the immature V subcomplex in the endoplasmic reticulum (ER), thus providing insight into the observation that VopQ kills cells in the absence of a functional V-ATPase. VopQ is a bacterial effector that has been discovered to inhibit a host-membrane megadalton complex by coincidentally binding its target, inserting into a membrane and disrupting membrane potential. Collectively, our results reveal a mechanism by which bacterial effectors modulate host cell biology and provide an invaluable tool for future studies on V-ATPase-mediated membrane fusion and autophagy.
History
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Jun 20, 2019
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Jul 3, 2019
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Map release
May 20, 2020
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Update
Mar 20, 2024
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Current status
Mar 20, 2024
Processing site: RCSB / Status: Released
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