The complex LTO1:YAE1 functions as a target specific adapter that probably recruits apo-ABCE1 to the cytosolic iron-sulfur protein assembly (CIA) complex machinery. May be required for biogenesis of the large ribosomal subunit and initiation of translation. May play a role in the regulation of proline metabolism and ROS production. Forms a complex with YAE1. Interacts with PYCR1 and PYCR2. Belongs to the LTO1 family. Extended N-terminus. Extended N-terminus. Extended N-terminus.