Structural model of an mRNA in complex with the bacterial chaperone Hfq
Abstract
The Sm-like protein Hfq (host factor Q-beta phage) facilitates regulation by bacterial small noncoding RNAs (sRNAs) in response to stress and other environmental signals. In this paper, we present a low-resolution model of Escherichia coli Hfq bound to the rpoS mRNA, a bacterial stress response gene that is targeted by three different sRNAs. Selective 2'-hydroxyl acylation and primer extension, small-angle X-ray scattering, and Monte Carlo molecular dynamics simulations show that the distal face and lateral rim of Hfq interact with three sites in the rpoS leader, folding the RNA into a compact tertiary structure. These interactions are needed for sRNA regulation of rpoS translation and position the sRNA target adjacent to an sRNA binding region on the proximal face of Hfq. Finally, our results show how Hfq specifically distorts the structure of the rpoS mRNA to enable sRNA base pairing and translational control.
- Authors:
-
- Johns Hopkins Univ., Baltimore, MD (United States). Cell, Molecular and Developmental Biology and Biophysics Program
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research
- National Inst. of Health, Frederick, MD (United States). National Cancer Inst. Center for Cancer Research. Structural Biophysics Lab.
- Johns Hopkins Univ., Baltimore, MD (United States). T. C. Jenkins Dept. of Biophysics
- Publication Date:
- Research Org.:
- Johns Hopkins Univ., Baltimore, MD (United States)
- Sponsoring Org.:
- USDOE; National Inst. of Health (NIH) (United States); National Science Foundation (NSF); Engineering and Physical Sciences Research Council (EPSRC)
- Contributing Org.:
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); National Inst. of Health, Frederick, MD (United States)
- OSTI Identifier:
- 1168867
- Grant/Contract Number:
- AC02-06CH11357; R01 GM46686; CHE-1265821; EP/K039121/1
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Proceedings of the National Academy of Sciences of the United States of America
- Additional Journal Information:
- Journal Volume: 111; Journal Issue: 48; Journal ID: ISSN 0027-8424
- Publisher:
- National Academy of Sciences, Washington, DC (United States)
- Country of Publication:
- United States
- Language:
- ENGLISH
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES; small noncoding RNA; RNA–protein interactions; SAXS; Lsm protein; bacterial posttranscriptional control
Citation Formats
Peng, Yi, Curtis, Joseph E., Fang, Xianyang, and Woodson, Sarah A. Structural model of an mRNA in complex with the bacterial chaperone Hfq. United States: N. p., 2014.
Web. doi:10.1073/pnas.1410114111.
Peng, Yi, Curtis, Joseph E., Fang, Xianyang, & Woodson, Sarah A. Structural model of an mRNA in complex with the bacterial chaperone Hfq. United States. https://doi.org/10.1073/pnas.1410114111
Peng, Yi, Curtis, Joseph E., Fang, Xianyang, and Woodson, Sarah A. Mon .
"Structural model of an mRNA in complex with the bacterial chaperone Hfq". United States. https://doi.org/10.1073/pnas.1410114111. https://www.osti.gov/servlets/purl/1168867.
@article{osti_1168867,
title = {Structural model of an mRNA in complex with the bacterial chaperone Hfq},
author = {Peng, Yi and Curtis, Joseph E. and Fang, Xianyang and Woodson, Sarah A.},
abstractNote = {The Sm-like protein Hfq (host factor Q-beta phage) facilitates regulation by bacterial small noncoding RNAs (sRNAs) in response to stress and other environmental signals. In this paper, we present a low-resolution model of Escherichia coli Hfq bound to the rpoS mRNA, a bacterial stress response gene that is targeted by three different sRNAs. Selective 2'-hydroxyl acylation and primer extension, small-angle X-ray scattering, and Monte Carlo molecular dynamics simulations show that the distal face and lateral rim of Hfq interact with three sites in the rpoS leader, folding the RNA into a compact tertiary structure. These interactions are needed for sRNA regulation of rpoS translation and position the sRNA target adjacent to an sRNA binding region on the proximal face of Hfq. Finally, our results show how Hfq specifically distorts the structure of the rpoS mRNA to enable sRNA base pairing and translational control.},
doi = {10.1073/pnas.1410114111},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 48,
volume = 111,
place = {United States},
year = {Mon Nov 17 00:00:00 EST 2014},
month = {Mon Nov 17 00:00:00 EST 2014}
}
Web of Science
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