The first two α‐sila‐dipeptides, 7 and cyclo‐sila‐dipeptide 8, were synthesized and characterized by several methods, including X‐ray crystallography. Bulky t‐BuMe2Si substituents provide some kinetic stabilization to the synthesized molecules. 7 and 8 are the first examples of a “Si for C switch” in the central α‐position of an amino acid or a peptide, in which silicon is bonded to both the amino
Padwa, Albert; Dean, Dennis C.; Zhi, Lin, Journal of the American Chemical Society, 1992, vol. 114, # 2, p. 593 - 601
作者:Padwa, Albert、Dean, Dennis C.、Zhi, Lin
DOI:——
日期:——
Synthesis and evaluation of aza-peptidyl inhibitors of the lysosomal asparaginyl endopeptidase, legumain
作者:Jiyoun Lee、Matthew Bogyo
DOI:10.1016/j.bmcl.2011.12.079
日期:2012.2
Highly potent and selective inhibitors of legumain would not only be valuable for studying the functional roles of legumain in these conditions, but may have therapeutic potential as well. We describe here the design, synthesis and in vitro evaluation of selective legumain inhibitors based on the aza-asparaginyl scaffold. We synthesized a library of aza-peptidyl inhibitors with various non-natural amino
Legumain 或天冬酰胺内肽酶 (AEP) 是一种溶酶体半胱氨酸蛋白酶,对天冬酰胺残基后的蛋白质底物切割具有高度特异性。当处于溶酶体的酸性环境中时,它也能够在天冬氨酸位点后裂解。Legumain 的表达和活性与许多病理状况有关,包括癌症、动脉粥样硬化和炎症,但其在这些病理中的生物学作用尚不清楚。高效和选择性的legumain抑制剂不仅对研究legumain在这些条件下的功能作用很有价值,而且可能具有治疗潜力。我们在这里描述了基于氮杂天冬酰胺支架的选择性legumain 抑制剂的设计、合成和体外评估。我们合成了具有各种非天然氨基酸和不同亲电子弹头的氮杂肽基抑制剂库,并表征了legumain失活的动力学特性。我们还合成了荧光标记的抑制剂,以研究化合物的细胞渗透性和选择性。抑制剂的二阶速率常数高达 5 × 10针对重组小鼠legumain的4 M -1 s -1和IC 50值低至4 nM。此外,抑制剂对legumain