Date of Award
1-1-2019
Document Type
Masters Thesis
Degree Name
M.S.
Organizational Unit
College of Natual Science and Mathematics, Chemistry and Biochemistry
First Advisor
Erich G. Chapman, Ph.D.
Keywords
Decay-resistant, S. cerevisiae, XRN1-resistant, 5'-3' exoribonuclease 1, xrRNAs, Yeast
Abstract
Flaviviruses are positive-strand single-stranded RNA viruses that are known to form pseudo-knot RNA structures that halt the progression of 5’→3’ exonuclease Xrn1. We show that these viral Xrn1-resistant structures (xrRNAs) can be used to protect specific homologously-expressed messenger RNAs from 5’→3’ degradation. We investigated the effects of addition of xrRNAs, artificially-installed into the intergenic region of bicistronic mRNA reporters, in the observed levels of protein expression in yeast. The reporters also contain an internal ribosome entry site from the cricket paralysis virus (CrPV IRES) to allow for cap-independent translation of the decay-protected gene, LacZ, encoding the enzyme β-galactosidase. Through the use of primer extension, βgalactosidase assay, and western blots, the results indicate that the partially-decayed RNAs are successfully translated, and that addition of xrRNAs results in a 30-50 fold increase in measured enzymatic activity and an accumulation of decay-resistant transcripts in the cell.
Publication Statement
Copyright is held by the author. User is responsible for all copyright compliance.
Rights Holder
Ana Luisa Franklin
Provenance
Received from ProQuest
File Format
application/pdf
Language
en
File Size
75 p.
Recommended Citation
Franklin, Ana Luisa, "Translation of Partially Decayed Messenger RNAs in Yeast" (2019). Electronic Theses and Dissertations. 1576.
https://digitalcommons.du.edu/etd/1576
Copyright date
2019
Discipline
Biochemistry, Molecular biology, Chemistry