Common over-represented proteins in the three Saccharomyces at low temperature
Regarding the number of common proteins (Fig. 4), Sk and Su shared a larger number than the comparison made with Sc, which suggests that the cryotolerant species gave a stronger proteomic response since they are better-adapted at low temperature. Most of these common proteins between Sk and Su are related with Translation (ribosomal proteins). Despite their small number, the common proteins between Sc and Sk also belonged to these functional categories and showed a common regulation in both strains (highlighted in red or green). Regarding the common proteins between Sc and Su, some nitrogen and vitamin metabolic pathways and proteins involved in nutrient sensing showed high significance. Finally, only three proteins were commonly over-represented in the three Saccharomyces strains, and two of them (Adh1p and Rps5p) had the same regulation. ADH1 is the main alcohol dehydrogenase, and is involved in the synthesis of ethanol from acetaldehyde, while RPS5 is a protein of the small (40S) ribosomal subunit.