The function of Ensembl gene identifier ENSG00000104872 (PIH1D1, PIH1 domain containing 1) is as follows. Involved in the assembly of C/D box small nucleolar ribonucleoprotein (snoRNP) particles (PubMed:17636026). Recruits the SWI/SNF complex to the core promoter of rRNA genes and enhances pre- rRNA transcription (PubMed:22368283, PubMed:24036451). Mediates interaction of TELO2 with the R2TP complex which is necessary for the stability of MTOR and SMG1 (PubMed:20864032). Positively regulates the assembly and activity of the mTORC1 complex (PubMed:24036451). {ECO:0000269|PubMed:17636026, ECO:0000269|PubMed:20864032, ECO:0000269|PubMed:22368283, ECO:0000269|PubMed:24036451}.