Synthase subunit of trehalose-6-P synthase/phosphatase complex%3B synthesizes the storage carbohydrate trehalose%2C which is critically important for survival of long-term desiccation%3B also found in a monomeric form%3B expression is induced by the stress response and repressed by the Ras-cAMP pathway%3B protein abundance increases in response to DNA replication stress and in response to prolonged exposure to boric acid