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Role of the 5’ UTR in Expression of an Essential Heat Shock Protein in M. smegmatis

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Populations Mycobacterium tuberculosis, are genetically identical but phenotypically heterogeneous within an infected individual. We hypothesize that one source of phenotypic heterogeneity is the 5’ untranslated regions (5’ UTRs), which can modulate both transcript stability and translation efficiency. The relatively long length of the 5’ UTR of groES suggests that its functionality may extend beyond ribosome binding. In order to investigate this hypothesis, the long 5’ UTR of the groES gene from Mycobacterium smegmatis was used to create a number of strains utilizing the native 5’ UTR and several modified variants upstream of a fluorescent reporter. Our results indicate that 5’ UTR composition dramatically affects expression levels and contributes to phenotypic heterogeneity.

  • This report represents the work of one or more WPI undergraduate students submitted to the faculty as evidence of completion of a degree requirement. WPI routinely publishes these reports on its website without editorial or peer review.
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  • E-project-012617-114253
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  • 2017
Date created
  • 2017-01-26
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