Component of the TORC1 and TORC2 complexes required for the regulation of the cellular respons to changes in available nutrients. 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 tel2. Belongs to the tti1 family.