Zinc cluster protein Znf1, a novel transcription factor of non-fermentative metabolism in Saccharomyces cerevisiae

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Author list: Tangsombatvichit P., Semkiv M.V., Sibirny A.A., Jensen L.T., Ratanakhanokchai K., Soontorngun N.

Publication year: 2015

Volume number: 15

Issue number: 2

ISSN: 1567-1364

eISSN: 1567-1364

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85005808084&doi=10.1093%2ffemsyr%2ffou002&partnerID=40&md5=0cb4aadf0e9e731b19e4ae8e62703b64

Languages: English-Great Britain (EN-GB)

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Abstract

The ability to rapidly respond to nutrient changes is a fundamental requirement for cell survival. Here, we show that the zinc cluster regulator Znf1 responds to altered nutrient signals following glucose starvation through the direct control of genes involved in non-fermentative metabolism, including those belonged to the central pathways of gluconeogenesis (PCK1, FBP1 and MDH2), glyoxylate shunt (MLS1 and ICL1) and the tricarboxylic acid cycle (ACO1), which is demonstrated by Znf1-binding enrichment at these promoters during the glucose-ethanol shift. Additionally, reduced Pck1 and Fbp1 enzymatic activities correlate well with the data obtained from gene transcription analysis. Cells deleted for ZNF1 also display defective mitochondrial morphology with unclear structures of the inner membrane cristae when grown in ethanol, in agreement with the substantial reduction in the ATP content, suggesting for roles of Znf1 in maintaining mitochondrial morphology and function. Furthermore, Znf1 also plays a role in tolerance to pH and osmotic stress, especially during the oxidative metabolism. Taken together, our results clearly suggest that Znf1 is a critical transcriptional regulator for stress adaptation during non-fermentative growth with some partial overlapping targets with previously reported regulators in Saccharomyces cerevisiae. ฉ FEMS 2015. All rights reserved. For permissions, please e-mail: journals.permission@oup.com.

Keywords

ATP content, mitochondrial defect, non-fermentative metabolism, stress-responsive gene, transcriptional regulator