May modulate transcriptional activation by target nuclear receptors. Can act as transcriptional activator (in vitro). . Involved in starvation-induced autophagy probably by its association with PI3K complex I (PI3KC3-C1). However, effects has been described variably. Involved in the induction of starvation-induced autophagy (PubMed:24785657). Stabilizes PI3KC3-C1 assembly and enhances ATG14-linked lipid kinase activity of PIK3C3 (By similarity). Proposed to negatively regulate basal and starvation-induced autophagy and to inhibit PIK3C3 activity by modulating interactions in PI3KC3-C1 (PubMed:25086043). May be involved in autophagosome biogenesis (PubMed:25086043). May play a role in neural progenitor cell survival during differentiation (By similarity). {ECO:0000250|UniProtKB:Q8VCQ3, ECO:0000269|PubMed:24785657, ECO:0000269|PubMed:25086043}. This is the function of Ensembl gene identifier ENSG00000148572 (NRBF2, nuclear receptor binding factor 2).