Regulatory factor X7 (RFX7)

Regulatory factor X7 (RFX7) is a member of the RFX family of highly conserved transcription factors that play essential roles in human development, cellular differentiation, immune function, and tumor suppression. RFX7 acts as a transcriptional activator by binding to promoter regions of target genes—such as PDCD4, PIK3IP1, MXD4, PNRC1, and RFX5—often via X-box cis-acting DNA elements. It operates downstream of the p53 tumor suppressor, linking p53 activation and cellular stress responses to the expression of pro-apoptotic and tumor suppressor effectors and promoting cell differentiation and apoptosis sensitivity. RFX7 is recurrently mutated or inactivated in certain lymphoid cancers and other malignancies. Besides its role in cancer, RFX7 is involved in neuronal processes, natural killer (NK) cell homeostasis, and possibly ciliogenesis and metabolic regulation. Protein interaction partners include ANKRA2 and RFXANK, which modulate its activity. While currently not a direct small-molecule drug target, its pathway is an attractive focus for future cancer therapies leveraging p53 and downstream effector restoration.

Other names

DNA-binding protein RFX7RFX7RFXDC2FLJ12994Regulatory factor X 7Regulatory factor X domain-containing protein 2MRD71Regulatory factor X domain containing 2

For drugs that activate p53 (such as Nutlin-3a), indirect: p53 activation upregulates RFX7, which then activates downstream tumor suppressor genes.