TruD is responsible for synthesis of pseudouridine from uracil-13 in transfer RNAs [1]. The structure of TruD reveals an overall V-shaped molecule which contains an RNA-binding cleft [2].

1: A novel unanticipated type of pseudouridine synthase with homologs in bacteria, archaea, and eukarya. Kaya Y, Ofengand J; RNA 2003;9:711-721. PMID:12756329

2: X-ray structure of tRNA pseudouridine synthase TruD reveals an inserted domain with a novel fold. Ericsson UB, Nordlund P, Hallberg BM; FEBS Lett 2004;565:59-64. PMID:15135053