Alzheimer’s Disease: Identification and Development of β-Secretase (BACE-1) Binding Fragments and Inhibitors by Dynamic Ligation Screening (DLS)
作者:María Isabel Fernández-Bachiller、André Horatscheck、Michael Lisurek、Jörg Rademann
DOI:10.1002/cmdc.201300078
日期:2013.7
Irreversibly formed fragment combination products of 1 with the initial peptide sequence were active and confirmed the targeting of the active site through the ethane‐1,2‐diamine isostere. Finally, structure‐assisted combination of fragment 1 with secondary fragments that target the S1 site in hit optimization yielded novel, entirely fragment‐based BACE‐1 inhibitors with up to 30‐fold improved binding affinity
据报道,动态连接筛选(DLS)是一种基于片段的药物发现(FBDD)方法,适用于天冬氨酸蛋白酶β-分泌酶(BACE-1)。为此,设计并合成了三种新的荧光共振能量转移(FRET)衬底。它们的动力学参数(V max,K M和k cat确定)并与市售底物进行比较。其次,基于瑞典突变底物序列,将肽醛设计为化学反应抑制剂(CRI)。此CRI与蛋白酶,FRET底物,和一种胺每孔由胺文库,将其组装由最大公共子(MCS)的方法所采取的温育后,揭示该片段3-(3-氨基苯基)-2- ħ - chromen-2-one(1)是竞争性BACE-1抑制剂,可增强CRI的活性。具有初始肽序列的不可逆形成的片段结合产物1具有活性,并证实了通过1,2,2-二胺等位基因靶向活性位点。最后,片段1的结构辅助组合通过在命中优化中靶向S1位点的二级片段,产生了全新的,完全基于片段的BACE-1抑制剂,结合亲和力提高了30倍。通