The function of ENSG00000028839 (TBPL1, TATA-box binding protein like 1) is as follows. Part of a specialized transcription system that mediates the transcription of most ribosomal proteins through the 5'-TCT-3' motif which is a core promoter element at these genes. Seems to also mediate the transcription of NF1. Does not bind the TATA box. {ECO:0000269|PubMed:10082669, ECO:0000269|PubMed:10220372, ECO:0000269|PubMed:15767669, ECO:0000269|PubMed:24958592}.