Isoxazole-Derived Amino Acids are Bromodomain-Binding Acetyl-Lysine Mimics: Incorporation into Histone H4 Peptides and Histone H3
作者:Angelina R. Sekirnik née Measures、David S. Hewings、Natalie H. Theodoulou、Lukass Jursins、Katie R. Lewendon、Laura E. Jennings、Timothy P. C. Rooney、Tom D. Heightman、Stuart J. Conway
DOI:10.1002/anie.201602908
日期:2016.7.11
ing peptides from the BAZ2A, BRD4(1), and BRD9 bromodomains. Three of these amino acids were incorporated into a histone H4-mimicking peptide and their affinity for BRD4(1) was assessed. Affinities of the isoxazole-containing peptides are comparable to those of a hyperacetylated histone H4-mimicking cognate peptide, and demonstrated a dependence on the position at which the unnatural residue was incorporated
合成了一系列含有异恶唑的氨基酸,这些氨基酸取代了BAZ2A,BRD4(1)和BRD9溴结构域中的含乙酰赖氨酸的肽。这些氨基酸中的三个被掺入到组蛋白H4模拟肽中,并评估了它们对BRD4(1)的亲和力。含异恶唑的肽的亲和力与超乙酰化组蛋白H4-模拟同源肽的亲和力相当,并且证明了对引入非天然残基的位置的依赖性。开发了基于异恶唑的烷基化剂,以选择性地对半胱氨酸残基进行原位烷基化。包含赖氨酸至半胱氨酸残基取代(K12C)的组蛋白H4模拟肽的选择性单烷基化导致乙酰基赖氨酸模拟物掺入,对BRD4溴结构域具有高亲和力。