Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/83602
Title: Mechanisms of Yersinia YopO kinase substrate specificity
Authors: Lee, Wei Lin
Singaravelu, Pavithra
Wee, Sheena
Xue, Bo
Ang, Khay Chun
Gunaratne, Jayantha
Grimes, Jonathan M.
Swaminathan, Kunchithapadam
Robinson, Robert C.
Keywords: Protein–protein interaction networks
Phosphorylation
Issue Date: 2017
Source: Lee, W. L., Singaravelu, P., Wee, S., Xue, B., Ang, K. C., Gunaratne, J., et al. (2017). Mechanisms of Yersinia YopO kinase substrate specificity. Scientific Reports, 7, 39998-.
Series/Report no.: Scientific Reports
Abstract: Yersinia bacteria cause a range of human diseases, including yersiniosis, Far East scarlet-like fever and the plague. Yersiniae modulate and evade host immune defences through injection of Yersinia outer proteins (Yops) into phagocytic cells. One of the Yops, YopO (also known as YpkA) obstructs phagocytosis through disrupting actin filament regulation processes - inhibiting polymerization-promoting signaling through sequestration of Rac/Rho family GTPases and by using monomeric actin as bait to recruit and phosphorylate host actin-regulating proteins. Here we set out to identify mechanisms of specificity in protein phosphorylation by YopO that would clarify its effects on cytoskeleton disruption. We report the MgADP structure of Yersinia enterocolitica YopO in complex with actin, which reveals its active site architecture. Using a proteome-wide kinase-interacting substrate screening (KISS) method, we identified that YopO phosphorylates a wide range of actin-modulating proteins and located their phosphorylation sites by mass spectrometry. Using artificial substrates we clarified YopO’s substrate length requirements and its phosphorylation consensus sequence. These findings provide fresh insight into the mechanism of the YopO kinase and demonstrate that YopO executes a specific strategy targeting actin-modulating proteins, across multiple functionalities, to compete for control of their native phospho-signaling, thus hampering the cytoskeletal processes required for macrophage phagocytosis.
URI: https://hdl.handle.net/10356/83602
http://hdl.handle.net/10220/42660
ISSN: 2045-2322
DOI: 10.1038/srep39998
Rights: © 2017 The Author(s) (Nature Publishing Group). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:LKCMedicine Journal Articles
SBS Journal Articles

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