Truly Exciting New Gene finger variants of zinc finger motifs act as ubiquitin E3-ligases and goal proteins like p53 to the proteasome. Because PHD and RING finger motifs are equally varieties of zinc fingers, it was GDC-0941 speculated that some PHDs also act as ubiquitin E3-ligases, but nearer inspection of PHD regions did not affirm this hypothesis. Based on this background, and a prior research indicating that INGs physically interact with at the very least 16 proteins straight concerned with proteasomal degradation this kind of as regulatory subunits of equally the 20S and 26S-proteasome, we questioned a) alpha-Amanitin whether or not ING1 stabilizes p53, and if so, b) whether or not ING might do this through impacting ubiquitin metabolic rate, therefore shielding p53 from proteasomal degradation. We discovered a region adjacent to the PHD of ING1 that acts as a ubiquitin-binding area. We also found that ubiquitin competes with PI signaling lipids for ING1 binding and that physiological stages of ING1 stabilize monoubiquitinated varieties of the p53 tumor suppressor via its UBD.
