TAP Subfamily: CBP
Lysine acetyltransferases or histone acetyltransferases (HATs) together with histone deacetylases (HDACs), are responsible for reversible acetylation of histones and are found in eukaryotes in at least four TR families, namely MYST (MOZ, Ybf2/Sas3, Sas2 and TIP60), CBP (p300/CREB-binding protein), TAFII250 (TATA-binding protein associated factor) and GNAT (GCN5-related N-terminal acetyltransferase) (Boycheva et al., 2014; Pandey, 2002; Uhrig et al., 2017). HATs function as transcriptional regulators by having different regulatory effects on gene expression in plants, animals and fungi, indicating a high conservation of these proteins and their functions (Pandey, 2002). Especially in land plants, due to their sessile lifestyle, chromatin modifications provide an important mechanism in adapting to environmental stresses (Boycheva et al., 2014). CBP proteins belonging to the HAT subfamily CBP are transcriptional coactivators that play a role in tumor suppression, in further physiological events and in signal transduction (Uhrig et al., 2017; Yuan & Giordano, 2002). These TRs can be found in all photosynthetic eukaryotes with two to five members (Uhrig et al., 2017; Yuan & Giordano, 2002).
References:
Boycheva, I., Vassileva, V., & Iantcheva, A. (2014). Histone Acetyltransferases in Plant Development and Plasticity. Current Genomics, 15(1), 28–37. https://doi.org/10.2174/138920291501140306112742
Pandey, R. (2002). Analysis of histone acetyltransferase and histone deacetylase families of Arabidopsis thaliana suggests functional diversification of chromatin modification among multicellular eukaryotes. Nucleic Acids Research, 30(23), 5036–5055. https://doi.org/10.1093/nar/gkf660
Uhrig, R. G., Schläpfer, P., Mehta, D., Hirsch-Hoffmann, M., & Gruissem, W. (2017). Genome-scale analysis of regulatory protein acetylation enzymes from photosynthetic eukaryotes. BMC Genomics, 18(1), 514. https://doi.org/10.1186/s12864-017-3894-0
Yuan, L. W., & Giordano, A. (2002). Acetyltransferase machinery conserved in p300/CBP-family proteins. Oncogene, 21(14), 2253–2260. https://doi.org/10.1038/sj.onc.1205283
