作者:Pradeep K. Singh、Hao Fan、Xiuju Jiang、Lei Shi、Carl F. Nathan、Gang Lin
DOI:10.1002/cmdc.201600384
日期:2016.10.6
noncovalent proteasome inhibitors. Herein we report that the insertion of a β‐amino acid into N,C‐capped dipeptides markedly decreases their inhibitory potency against human constitutive proteasome β5c, while maintaining potent inhibitory activity against human immunoproteasome β5i, thereby achieving thousands‐fold selectivity for β5i over β5c. Structure–activity relationship studies revealed that β5c does
N,C封端的二肽属于一类非共价蛋白酶体抑制剂。我们在此报道,在N,C封端的二肽中插入β-氨基酸显着降低了其对人组成型蛋白酶体β5c的抑制能力,同时保持了对人免疫蛋白酶体β5i的有效抑制活性,从而实现了对β5i的选择性是β5c的数千倍。 。结构-活性关系研究表明,β5c不像β5i那样耐受基于β-氨基酸的二肽模拟物。在体外,发现一种这样的化合物抑制人T细胞增殖。这类化合物作为自身免疫性和炎症性疾病的治疗剂,其潜在的机制毒性低于比也能抑制组成型蛋白酶体的药剂低的机制毒性。