Loading...
A systematic analysis of the RNA-targeting potential of secreted bacterial effector proteins.
Tawk, Caroline Sharan, Malvika
Tawk, Caroline
Sharan, Malvika
Citations
Altmetric:
Advisors
Editors
Other Contributors
Issue Date
2017-08-24
Submitted date
Files
Loading...
Open Access publication
Adobe PDF, 2.3 MB
Other Titles
Abstract
Many pathogenic bacteria utilize specialized secretion systems to deliver proteins called effectors into eukaryotic cells for manipulation of host pathways. The vast majority of known effector targets are host proteins, whereas a potential targeting of host nucleic acids remains little explored. There is only one family of effectors known to target DNA directly, and effectors binding host RNA are unknown. Here, we take a two-pronged approach to search for RNA-binding effectors, combining biocomputational prediction of RNA-binding domains (RBDs) in a newly assembled comprehensive dataset of bacterial secreted proteins, and experimental screening for RNA binding in mammalian cells. Only a small subset of effectors were predicted to carry an RBD, indicating that if RNA targeting was common, it would likely involve new types of RBDs. Our experimental evaluation of effectors with predicted RBDs further argues for a general paucity of RNA binding activities amongst bacterial effectors. We obtained evidence that PipB2 and Lpg2844, effector proteins of Salmonella and Legionella species, respectively, may harbor novel biochemical activities. Our study presenting the first systematic evaluation of the RNA-targeting potential of bacterial effectors offers a basis for discussion of whether or not host RNA is a prominent target of secreted bacterial proteins.
Citation
A systematic analysis of the RNA-targeting potential of secreted bacterial effector proteins. 2017, 7 (1):9328 Sci Rep
Publisher
Journal
PubMed ID
PubMed Central ID
Additional Links
Embedded video
Type
Article
Language
en
Description
Series/Report no.
ISSN
2045-2322