This is the N-terminal domain of eukaryotic tRNA pseudouridine synthase Pus10 [1]. Pus10 has different functions depending on its subcellular location: involved in miRNA processing in the nucleus and acts as a tRNA pseudouridylate synthase in the cytoplasm [2,3]. This domain functions as an accessory RNA-binding domain regarding the presence of a THUMP domain, similarly to other pseudouridine synthases (Pfam:PF02926) [1]. This entry does not include archaeal Pus10, the N-terminal domain of eukaryotic Pus10 is much larger than that of archaeal Pus10 [2].

1: Crystal structure of human Pus10, a novel pseudouridine synthase. McCleverty CJ, Hornsby M, Spraggon G, Kreusch A; J Mol Biol. 2007;373:1243-1254. PMID:17900615

2: Mammalian nuclear TRUB1, mitochondrial TRUB2, and cytoplasmic PUS10 produce conserved pseudouridine 55 in different sets of tRNA. Mukhopadhyay S, Deogharia M, Gupta R; RNA. 2021;27:66-79. PMID:33023933

3: Differential roles of human PUS10 in miRNA processing and tRNA pseudouridylation. Song J, Zhuang Y, Zhu C, Meng H, Lu B, Xie B, Peng J, Li M, Yi C; Nat Chem Biol. 2020;16:160-169. PMID:31819270