TRUB2 is a mitochondrial pseudouridine synthase that catalyzes Psi55 formation in mitochondrial tRNAs, localizes to mitochondrial RNA granules, and is essential for mitochondrial translation and OXPHOS complex assembly.
"TRUB2 functions as a mitochondrial tRNA Psi55 synthase, catalyzing the formation of pseudouridine at position 55 in the TPC loop of select mitochondrial tRNAs"