Regulatory factor X-associated protein is a protein that in humans is encoded by the RFXAPgene.[5][6]
Major histocompatibility (MHC) class II molecules are transmembrane proteins that have a central role in development and control of the immune system. The protein encoded by this gene, along with regulatory factor X-associated ankyrin-containing protein and regulatory factor-5, forms a complex that binds to the X box motif of certain MHC class II gene promoters and activates their transcription. Once bound to the promoter, this complex associates with the non-DNA-binding factor MHC class II transactivator, which controls the cell type specificity and inducibility of MHC class II gene expression. Mutations in this gene have been linked to bare lymphocyte syndrome type II, complementation group D. Transcript variants utilizing different polyA signals have been found for this gene.[6]
Mach B, Steimle V, Martinez-Soria E, Reith W (1996). "Regulation of MHC class II genes: lessons from a disease". Annu. Rev. Immunol. 14: 301–31. doi:10.1146/annurev.immunol.14.1.301. PMID8717517.
Villard J, Lisowska-Grospierre B, van den Elsen P, et al. (1997). "Mutation of RFXAP, a regulator of MHC class II genes, in primary MHC class II deficiency". N. Engl. J. Med. 337 (11): 748–53. doi:10.1056/NEJM199709113371104. PMID9287230.
Gobin SJ, Peijnenburg A, van Eggermond M, et al. (1998). "The RFX complex is crucial for the constitutive and CIITA-mediated transactivation of MHC class I and beta2-microglobulin genes". Immunity. 9 (4): 531–41. doi:10.1016/S1074-7613(00)80636-6. PMID9806639.
Nagarajan UM, Louis-Plence P, DeSandro A, et al. (1999). "RFX-B is the gene responsible for the most common cause of the bare lymphocyte syndrome, an MHC class II immunodeficiency". Immunity. 10 (2): 153–62. doi:10.1016/S1074-7613(00)80016-3. PMID10072068.
Mudhasani R, Fontes JD (2005). "Multiple interactions between BRG1 and MHC class II promoter binding proteins". Mol. Immunol. 42 (6): 673–82. doi:10.1016/j.molimm.2004.09.021. PMID15781111.
Long AB, Ferguson AM, Majumder P, et al. (2006). "Conserved residues of the bare lymphocyte syndrome transcription factor RFXAP determine coordinate MHC class II expression". Mol. Immunol. 43 (5): 395–409. doi:10.1016/j.molimm.2005.03.008. PMID16337482.