E3 ubiquitin ligase
E3 ubiquitin ligase (A ubiquitin ligase ) is a protein that recruits an E2 ubiquitin-conjugating enzyme that has been loaded with ubiquitin, recognizes a protein substrate, and assists or directly catalyzes the transfer of ubiquitin from the E2 to the protein substrate. The ubiquitin is attached to a lysine on the target protein by an isopeptide bond. E3 ligases interact with both the target protein and the E2 enzyme, and so impart substrate specificity to the E2. Commonly, E3s polyubiquitinate their substrate with Lys48-linked chains of ubiquitin, targeting the substrate for destruction by the proteasome. However, many other types of linkages are possible and alter a protein's activity, interactions, or localization. Ubiquitination by E3 ligases regulates diverse areas such as cell trafficking, DNA repair, and signaling and is of profound importance in cell biology. E3 ligases are also key players in cell cycle control, mediating the degradation of cyclins, as well as cyclin dependent kinase inhibitor proteins.
-
Varenicline Tartrate是一种烟碱类AChR激动剂，用于治疗吸烟成瘾。
More
-
Amfebutamone HCl是一种选择性去甲肾上腺素-多巴胺再摄取的抑制剂，IC50分别为6.5和3.4μM。
More
-
化合物Acetylcholine Chloride是一种神经递质，作用于包括人类在内的许多生物的周围神经系统（PNS）和中枢神经系统（CNS）。
More
