Component of the TORC1 and TORC2 complexes required for the regulation of the cellular respons to changes in available nutrients. Required for normal entry into S phase. Regulates activation of the DNA replication checkpoint. Required for efficient phosphorylation of mrc1, which is essential for the activation of cds1 kinase. Also plays an important role in genome stability. Component of the TORC1 complex composed of at least mip1, orb5, tel2, toc1, toc89, tor2, tti1 and wat1. Component of the TORC2 complex composed of at least bit61, orb5, sin1, ste20, tel2, tor1, tti1 and wat1. Interacts with tti1. Belongs to the TEL2 family.