Apoptosis-stimulating of p53 protein 1 is a protein that in humans is encoded by the PPP1R13Bgene.[1][2]
This gene encodes a member of the ASPP (apoptosis-stimulating protein of p53) family of p53 interacting proteins. The protein contains four ankyrin repeats and an SH3 domain involved in protein-protein interactions. ASPP proteins are required for the induction of apoptosis by p53-family proteins. They promote DNA binding and transactivation of p53-family proteins on the promoters of proapoptotic genes. Expression of this gene is regulated by the E2F transcription factor.[2]
References
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Samuels-Lev Y, O'Connor DJ, Bergamaschi D, et al. (2001). "ASPP proteins specifically stimulate the apoptotic function of p53". Mol. Cell. 8 (4): 781–94. doi:10.1016/S1097-2765(01)00367-7. PMID11684014.
Heilig R, Eckenberg R, Petit JL, et al. (2003). "The DNA sequence and analysis of human chromosome 14". Nature. 421 (6923): 601–7. doi:10.1038/nature01348. PMID12508121.
Ota T, Suzuki Y, Nishikawa T, et al. (2004). "Complete sequencing and characterization of 21,243 full-length human cDNAs". Nat. Genet. 36 (1): 40–5. doi:10.1038/ng1285. PMID14702039.
Hershko T, Chaussepied M, Oren M, Ginsberg D (2005). "Novel link between E2F and p53: proapoptotic cofactors of p53 are transcriptionally upregulated by E2F". Cell Death Differ. 12 (4): 377–83. doi:10.1038/sj.cdd.4401575. PMID15706352.
Fogal V, Kartasheva NN, Trigiante G, et al. (2005). "ASPP1 and ASPP2 are new transcriptional targets of E2F". Cell Death Differ. 12 (4): 369–76. doi:10.1038/sj.cdd.4401562. PMID15731768.
Liu ZJ, Lu X, Zhang Y, et al. (2005). "Downregulated mRNA expression of ASPP and the hypermethylation of the 5'-untranslated region in cancer cell lines retaining wild-type p53". FEBS Lett. 579 (7): 1587–90. doi:10.1016/j.febslet.2005.01.069. PMID15757645.
Bergamaschi D, Samuels Y, Zhong S, Lu X (2005). "Mdm2 and mdmX prevent ASPP1 and ASPP2 from stimulating p53 without targeting p53 for degradation". Oncogene. 24 (23): 3836–41. doi:10.1038/sj.onc.1208535. PMID15782125.
Agirre X, Román-Gómez J, Jiménez-Velasco A, et al. (2006). "ASPP1, a common activator of TP53, is inactivated by aberrant methylation of its promoter in acute lymphoblastic leukemia". Oncogene. 25 (13): 1862–70. doi:10.1038/sj.onc.1209236. PMID16314841.