Transcription factor that participates in the transcriptional activation of glucose-repressed genes during exponential growth in non-fermentable carbon conditions. Also involved in salt-stress response. Found in the nucleus in conditions under which NSF1 is actively transcribed, such as growth with non-fermentable carbon sources or salt stress. Repressed by glucose but is activated in the presence of non-fermentable carbon sources or salt stress. The latter transcriptional activation of NSF1 is partially dependent on the SNF1 signaling pathway.