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本帖最后由 dejunchem 于 2013-4-6 15:23 编辑
的药物设计(Electrophilic Fragment-Based Design)拿出来和大家分享。
Electrophilic Fragment-Based Design of Reversible Covalent Kinase Inhibitors
基于电片段的可逆性共价激酶抑制剂的合理设计
ABSTRACT: Fragment-based ligand design and covalent targeting of noncatalytic cysteines have been employed to develop potent and selective kinase inhibitors. Here, we combine these approaches, starting with a panel of low molecular-weight, heteroaryl-susbstituted cyanoacrylamides, which we have previously shown to form reversible covalent bonds with cysteine thiols. Using this strategy, we identify electrophilic fragments with sufficient ligand efficiency and selectivity to serve as starting points for the first reported inhibitors of the MSK1 C-terminal kinase domain. Guided by X-ray co-crystal structures, indazole fragment 1 was elaborated to afford 12 (RMM-46), a reversible covalent inhibitor that exhibits high ligand efficiency and selectivity for MSK/RSK-family kinases. At nanomolar concentrations, 12 blocked activation of cellular MSK and RSK, as well as downstream phosphorylation of the critical transcription factor, CREB.
摘要:基于片段化的配体设计和靶向非催化域色氨酸的手段以成为开发具有高效性,高选择性激酶抑制剂的重要手段。在这片报到里,我们联合这些策略,以我们先去证实具有较好可逆性共价修饰色氨酸硫醇键的小分子, 芳香基团取代氰基丙烯酰胺为起始分子,运用这些策略,我们首次报到了在电性和选择性均能很好锲和激酶MSK1碳末端的选择性高效性配体。再借助单晶衍射,引入吲哚优势片段,得到了骨架12(化合物RMM-46)。这个分子在可逆性和选择性抑制MSK/RSK家族激酶上表现出极为优越的活性:在纳摩尔级别即能好阻断细胞内MSK和RSK的激活,并且现在的下调关键转录因子 CREB的磷酸化水平。
J. Am. Chem. Soc., Article ASAP |