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Study on the Role oftmRNA in Protecting Escherichia coli Cell Under Oxidative stress.
- Date Issued:
- 2007
- Summary:
- tmRNA is a small stable RNA present in Eubacteria. Through a mechanism called trans-translation, tmRNA mediates ribosome rescue and quality control of proteins and mRNA. In this study, the Escherichia coli (E. coli) mutant lacking tmRNA was demonstrated hypersensitive to oxidative stress. The role of tmRNA-mediated surveillance mechanism in protecting E. coli cell under oxidative stress condition was examined. The tmRNA-mediated tagged protein levels were elevated in cells under oxidative stress condition, demonstrating the enhanced need for tmRNA under such condition. Our results suggest that mRNA damage by oxidative stress may cause reduced cell viability, and that tmRNA is required to rescue cells under such condition. Furthermore, our observations showed that tmRNA is required for the optimal growth of E. coli under normal aeration but not under anaerobic condition, suggesting that oxidation ofmRNA is the major reason for requirement oftmRNA during normal aeration.
Title: | Study on the Role oftmRNA in Protecting Escherichia coli Cell Under Oxidative stress. |
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Name(s): |
Kollipara, Gayatri Li, Zhongwei, Thesis advisor Florida Atlantic University, Degree grantor Charles E. Schmidt College of Medicine Department of Biomedical Science |
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Type of Resource: | text | |
Genre: | Electronic Thesis Or Dissertation | |
Date Created: | 2007 | |
Date Issued: | 2007 | |
Publisher: | Florida Atlantic University | |
Place of Publication: | Boca Raton, FL | |
Physical Form: | application/pdf | |
Extent: | 113 p. | |
Language(s): | English | |
Summary: | tmRNA is a small stable RNA present in Eubacteria. Through a mechanism called trans-translation, tmRNA mediates ribosome rescue and quality control of proteins and mRNA. In this study, the Escherichia coli (E. coli) mutant lacking tmRNA was demonstrated hypersensitive to oxidative stress. The role of tmRNA-mediated surveillance mechanism in protecting E. coli cell under oxidative stress condition was examined. The tmRNA-mediated tagged protein levels were elevated in cells under oxidative stress condition, demonstrating the enhanced need for tmRNA under such condition. Our results suggest that mRNA damage by oxidative stress may cause reduced cell viability, and that tmRNA is required to rescue cells under such condition. Furthermore, our observations showed that tmRNA is required for the optimal growth of E. coli under normal aeration but not under anaerobic condition, suggesting that oxidation ofmRNA is the major reason for requirement oftmRNA during normal aeration. | |
Identifier: | FA00000782 (IID) | |
Degree granted: | Thesis (M.S.)--Florida Atlantic University, 2007. | |
Collection: | FAU Electronic Theses and Dissertations Collection | |
Note(s): |
Includes bibliography. Charles E. Schmidt College of Science |
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Subject(s): |
Proteins--Synthesis Bacterial genetics Escherichia coli infections Cells--Evolution |
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Held by: | Florida Atlantic University Libraries | |
Persistent Link to This Record: | http://purl.flvc.org/fau/fd/FA00000782 | |
Sublocation: | Digital Library | |
Use and Reproduction: | Copyright © is held by the author with permission granted to Florida Atlantic University to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder. | |
Use and Reproduction: | http://rightsstatements.org/vocab/InC/1.0/ | |
Host Institution: | FAU | |
Is Part of Series: | Florida Atlantic University Digital Library Collections. |