Transcriptional regulator Kaiso is a protein that in humans is encoded by the ZBTB33gene.[5] This gene encodes a transcriptional regulator with bimodal DNA-binding specificity, which binds to methylated CGCG and also to the non-methylated consensus KAISO-binding site TCCTGCNA. The protein contains an N-terminal POZ/BTB domain and 3 C-terminal zinc finger motifs. It recruits the N-CoR repressor complex to promote histone deacetylation and the formation of repressive chromatin structures in target gene promoters. It may contribute to the repression of target genes of the Wnt signaling pathway, and may also activate transcription of a subset of target genes by the recruitment of catenin delta-2 (CTNND2). Its interaction with catenin delta-1 (CTNND1) inhibits binding to both methylated and non-methylated DNA. It also interacts directly with the nuclear import receptor Importin-α2 (also known as karyopherin alpha2 or RAG cohort 1), which may mediate nuclear import of this protein. Alternatively spliced transcript variants encoding the same protein have been identified.[6]
Daniel JM, Ireton RC, Reynolds AB (Jun 2001). "Monoclonal antibodies to Kaiso: a novel transcription factor and p120ctn-binding protein". Hybridoma. 20 (3): 159–66. doi:10.1089/027245701750293484. PMID11461664.
Kim SW, Park JI, Spring CM, Sater AK, Ji H, Otchere AA, Daniel JM, McCrea PD (Dec 2004). "Non-canonical Wnt signals are modulated by the Kaiso transcriptional repressor and p120-catenin". Nature Cell Biology. 6 (12): 1212–20. doi:10.1038/ncb1191. PMID15543138. S2CID19404686.
Kelly KF, Otchere AA, Graham M, Daniel JM (Dec 2004). "Nuclear import of the BTB/POZ transcriptional regulator Kaiso". Journal of Cell Science. 117 (Pt 25): 6143–52. doi:10.1242/jcs.01541. PMID15564377. S2CID17008036.
Rush J, Moritz A, Lee KA, Guo A, Goss VL, Spek EJ, Zhang H, Zha XM, Polakiewicz RD, Comb MJ (Jan 2005). "Immunoaffinity profiling of tyrosine phosphorylation in cancer cells". Nature Biotechnology. 23 (1): 94–101. doi:10.1038/nbt1046. PMID15592455. S2CID7200157.
Spring CM, Kelly KF, O'Kelly I, Graham M, Crawford HC, Daniel JM (May 2005). "The catenin p120ctn inhibits Kaiso-mediated transcriptional repression of the beta-catenin/TCF target gene matrilysin". Experimental Cell Research. 305 (2): 253–65. doi:10.1016/j.yexcr.2005.01.007. PMID15817151.