BTG3 associated nuclear protein (BANP)

BTG3 associated nuclear protein (BANP) is a multifunctional nuclear protein that binds to matrix attachment regions (MARs) to regulate chromatin structure and transcription. It is recognized primarily for its role as a tumor suppressor and as a cell cycle regulator. BANP regulates transcription through binding specific DNA motifs (notably TCTCGCGAGA, the "Banp motif") and influences the transcription of genes important for DNA replication, damage response, and mitotic chromosome segregation—including wrnip1, cenpt, and ncapg. At the molecular level, BANP interacts with the tumor suppressor p53, modulating its transcriptional activity, phosphorylation, and deacetylation, thereby mediating cell cycle arrest and promoting DNA damage repair. BANP also impacts alternative splicing, immune response pathways (MHC I expression), cell adhesion, and migration, influencing metastatic potential and stress-induced signaling. Circular RNA variants from BANP have been linked to cancer cell proliferation and invasion. The BANP gene is located on human chromosome 16q24—a region frequently lost in cancers. Loss or decreased function of BANP can lead to defective DNA damage repair, mitotic errors, apoptosis, and enhanced cancer susceptibility. BANP’s roles in vivo include controlling embryonic development, cell survival, and proliferation, primarily through its actions in DNA damage repair and cell-cycle progression.

Other names

Protein BANPBEND1SMAR1SMARBP1FLJ20538DKFZp761H172FLJ10177BEN domain-containing protein 1Scaffold/matrix-associated region-binding protein 1BEN domain containing 1