FEATURES

FAMILY

DESCRIPTION

Also known as PSIP1_HUMAN, PSIP1, DFS70, LEDGF, PSIP2. Transcriptional coactivator involved in neuroepithelial stem cell differentiation and neurogenesis. Involved in particular in lens epithelial cell gene regulation and stress responses. May play an important role in lens epithelial to fiber cell terminal differentiation. May play a protective role during stress-induced apoptosis. Isoform 2 is a more general and stronger transcriptional coactivator. Isoform 2 may also act as an adapter to coordinate pre-mRNA splicing. Cellular cofactor for lentiviral integration. Monomer (PubMed:15895093). Interacts with IFRD1/PC4 (PubMed:9822615). Isoform 2 interacts with SFRS1 (PubMed:9885563). Isoform 1 interacts (via IBD domain) with POGZ (via IBM motif) and CDCA7L (via IBM motifs) (PubMed:19244240, PubMed:25082813, PubMed:29997176). Interacts (via IBD domain) with KMT2A (via IBM motifs) with a moderate affinity whereas interacts with the KMT2A-MEN1 complex with a greater affinity; MEN1 enhances interaction of KMT2A with PSIP1 (PubMed:22327296, PubMed:25305204, PubMed:25082813, PubMed:29997176). Interacts with fusion protein KMT2A-MLLT3 (PubMed:25305204). Interacts (via IBD domain) with IWS1 (via IBM motif), MED1 (via IBM motif) and DBF4 (via IBM motifs) (PubMed:29997176).

EXTERNAL LINKS

PSIP1

PC4 and SFRS1-interacting protein

PSIP1

Molecular Synopsis