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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

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1

The Regulation of NAP4 in Saccharomyces cerevisiae

Capps, Denise 20 May 2011 (has links)
The CCAAT binding-factor (CBF) is a transcriptional activator conserved in eukaryotes. The CBF in Saccharomyces cerevisiae is a multimeric heteromer termed the Hap2/3/4/5 complex. Hap4, which contains the activation domain of the complex, is also the regulatory subunit and is known to be transcriptionally controlled by carbon sources. However, little is known about Hap4 regulation. In this report, I identify mechanisms by which Hap4 is regulated, including: (1) transcriptional regulation via two short upstream open reading frames (uORFs) in the 5' leader sequence of HAP4 mRNA; (2) proteasome-dependent degradation of Hap4; and (3) identification of two negative regulators of HAP4 expression, CYC8 and SIN4. I also report differential patterns of Hap4 cellular localization which depends on (1) carbon sources, (2) abundance of Hap4 protein, and (3) presence or absence of mitochondrial DNA (mtDNA).
Hap2
Hap3
Hap4
Hap5
Hap2-5
CCAAT-binding factor
CBF
cerevisiae
SSN6
CYC8
SIN4
upstream open reading frames
uORF
glucose repression
carbon catabolite repression

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