AuTophaGy related 1 (Atg1) is a 101.7kDa serine/threonine kinase in S.cerevisiae, encoded by the gene ATG1.It is essential for the initial building of the autophagosome and Cvt vesicles.In a non-kinase role it is - through complex formation with Atg13 and Atg17 - directly controlled by the TOR kinase, a sensor for nutrient availability.