Glucose Signaling Pathway and Growth Conditions Regulate Gene Expression in Retrotransposon Ty2


Türkela, Sezai and Bayram, Ozgur and Arika, Elif (2009) Glucose Signaling Pathway and Growth Conditions Regulate Gene Expression in Retrotransposon Ty2. Zeitschrift für Naturforschung C: a Journal of Biosciences, 64 (7-8). pp. 526-532. ISSN 0939-5075

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Abstract

Gene expression in the yeast retrotransposon Ty2 is regulated at transcriptional and translational levels. In this study, we have shown that the transcription of Ty2 is partially dependent on the membrane-bound glucose sensors Gpr1p and Mth1p in Saccharomyces cerevisiae. Transcription of Ty2 decreased approx. 3-fold in the gpr1, mth1 yeast mutant. Moreover, our results revealed that the transcription of Ty2 fl uctuates during the growth stages of S. cerevisae. Both transcription and the frameshift rate of Ty2 rapidly dropped when the stationary stage yeast cells were inoculated into fresh medium. There was an instant activation of Ty2 transcription and a high level expression during the entire logarithmic stage of yeast growth. However, the transcription of Ty2 decreased 2-fold when the yeast cultures entered the stationary stage. The frameshift rate in Ty2 also varied depending on the growth conditions. The highest frameshift level was observed during the mid-logarithmic stage. It decreased up to 2-fold during the stationary stage. Furthermore, we have found that the frameshift rate of Ty2 diminished at least 5-fold in slowly growing yeasts. These results indicate that the transcription and the frameshift effi ciency are coordinately regulated in the retrotransposon Ty2 depending on the growth conditions of S. cerevisiae.

Item Type: Article
Keywords: Frameshift; Ty Elements; Glucose Sensing;
Academic Unit: Faculty of Science and Engineering > Biology
Item ID: 7181
Depositing User: Ozgur Bayram
Date Deposited: 13 Jul 2016 12:02
Journal or Publication Title: Zeitschrift für Naturforschung C: a Journal of Biosciences
Publisher: de Gruyter
Refereed: Yes
URI:

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