The Saccharomyces cerevisiae Snf1 protein kinase has been reported to be required for adaptation to glucose limitation and for growth on non-fermentable carbon sources. Here we present novel findings indicating that Snf1, the key regulator of cellular energy, is also involved in yeast cell cycle control. the lack of Snf1 α-catalytic subunit downregulates the growth rate and CLB5 expression, delaying Sld2 phosphorylation and G1/S transition, in cells grown in 2%, but not in 5% glucose. A non-phosphorylatable Snf1 rescues the slow growth phenotype, whereas a wild type or a phosphomimetic mutant is required to rescue growth rate and the G1/S delay. Using either Snf1 or Swi6 as a bait, a specific interaction of Snf1 with Swi6, the regulatory subunit of MBF, was detected. In conclusion, this report describes a previously unrecognized role for Snf1 in transcriptional modulation of the G1 to S transition, differing from the reported AMpK role in controlling the G 1/S transition in multicellular eukaryotes.

Pessina, S., Tsiarentsyeva, V., Busnelli, S., Vanoni, M., Alberghina, L., Coccetti, P. (2010). Snf1/AMPK promotes S-phase entrance by controlling CLB5 transcription in budding yeast. CELL CYCLE, 9(11), 2189-2200 [10.4161/cc.9.11.11847].

Snf1/AMPK promotes S-phase entrance by controlling CLB5 transcription in budding yeast

VANONI, MARCO ERCOLE;ALBERGHINA, LILIA
;
COCCETTI, PAOLA
2010

Abstract

The Saccharomyces cerevisiae Snf1 protein kinase has been reported to be required for adaptation to glucose limitation and for growth on non-fermentable carbon sources. Here we present novel findings indicating that Snf1, the key regulator of cellular energy, is also involved in yeast cell cycle control. the lack of Snf1 α-catalytic subunit downregulates the growth rate and CLB5 expression, delaying Sld2 phosphorylation and G1/S transition, in cells grown in 2%, but not in 5% glucose. A non-phosphorylatable Snf1 rescues the slow growth phenotype, whereas a wild type or a phosphomimetic mutant is required to rescue growth rate and the G1/S delay. Using either Snf1 or Swi6 as a bait, a specific interaction of Snf1 with Swi6, the regulatory subunit of MBF, was detected. In conclusion, this report describes a previously unrecognized role for Snf1 in transcriptional modulation of the G1 to S transition, differing from the reported AMpK role in controlling the G 1/S transition in multicellular eukaryotes.
Articolo in rivista - Articolo scientifico
AMPK/Snf1; Cell cycle; Clb5; Saccharomyces cerevisiae;
English
2010
9
11
2189
2200
none
Pessina, S., Tsiarentsyeva, V., Busnelli, S., Vanoni, M., Alberghina, L., Coccetti, P. (2010). Snf1/AMPK promotes S-phase entrance by controlling CLB5 transcription in budding yeast. CELL CYCLE, 9(11), 2189-2200 [10.4161/cc.9.11.11847].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/12405
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