The function of HNRNPUL1 (heterogeneous nuclear ribonucleoprotein U like 1, ENSG00000105323) is as follows. Acts as a basic transcriptional regulator. Represses basic transcription driven by several virus and cellular promoters. When associated with BRD7, activates transcription of glucocorticoid- responsive promoter in the absence of ligand-stimulation. Also plays a role in mRNA processing and transport. Binds avidly to poly(G) and poly(C) RNA homopolymers in vitro. {ECO:0000269|PubMed:12489984, ECO:0000269|PubMed:9733834}.