Nuclear receptor/Wnt beta-catenin interactions are regulated via differential CBP/p300 coactivator usage

• Published in: PloS one Vol. 13; no. 7; p. e0200714
• Main Authors: Ono, Masaya, Lai, Keane K Y, Wu, Kaijin, Nguyen, Cu, Lin, David P, Murali, Ramachandran, Kahn, Michael
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 18.07.2018; Public Library of Science (PLoS)
• Subjects: Adaptation; Amino acids; Analysis; Animals; beta Catenin - genetics; beta Catenin - metabolism; Binding proteins; Biochemistry; Biology and Life Sciences; Cell division; Cell Line, Tumor; Clonal deletion; CREB-Binding Protein - genetics; CREB-Binding Protein - metabolism; Cyclic AMP response element-binding protein; Event-related potentials; Evolution; Evolution, Molecular; Evolutionary biology; Genomic Instability - physiology; Homeostasis; Homology; Kinases; Life cycle engineering; Life cycles; Life cycles (Biology); Life span; Medicine; Metabolism; Mice; Nuclear receptors; p300-CBP Transcription Factors - genetics; p300-CBP Transcription Factors - metabolism; Pathology; Physical Sciences; Population; Protein-protein interactions; Proteins; R&D; Research & development; Research and Analysis Methods; Stem cells; Vertebrates; Wnt protein; Wnt Signaling Pathway - physiology; β-Catenin; Southern California; Los Angeles California; United States > US
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0200714

Over 400 million years ago, the evolution of vertebrates gave rise to a life cycle in which the organism began to live longer particularly as an adult. To accommodate such a longer lifespan, the organism underwent adaptation, developing a mechanism for long-lived cellular homeostasis. This adaptation required a population of long-lived relatively quiescent somatic stem cells (SSCs) along with a more proliferative differentiated daughter cell population, and was necessary to safeguard the genetic attributes with which SSCs were endowed. Intriguingly, cAMP response element binding protein (CREB)-binding protein (CBP) and E1A-binding protein, 300 kDa (p300), the highly homologous Kat3 coactivators had diverged, through duplication of ancestral Kat3, immediately preceding the evolution of vertebrates, given that both CBP and p300 have been detected in nearly all vertebrates versus non-vertebrates. We now demonstrate that a relatively small, highly evolutionarily conserved, amino terminal 9 amino acid deletion in CBP versus p300, plays a critical role in allowing for both robust maintenance of genomic integrity in stem cells and the initiation of a feed-forward differentiation mechanism by tightly controlling the interaction of the nuclear receptor family with the Wnt signaling cascade in either an antagonistic or synergistic manner.