The design and synthesis of modified pentapeptides based on a truncated
version of the substrate for KDM4C, a histone lysine demethylase (KDM), and investigation
of their inhibitory activity at KDM4C is reported. By modifying the
lysine residue corresponding to lysine 9 at histone 3 (H3K9), three different series of
peptides were designed and synthesized. One series contained N-acylated H3K9 and
two series introduced triazoles in this position via click chemistry to enable facile
variation of headgroups. The click reaction is compatible with free amino acids and
this was performed on an azido containing deprotected pentapeptide demonstrating a
highly facile and convergent synthetic strategy for making substrate-based inhibitors.
One of the 14 peptides showed inhibitory activity at KDM4C demonstrating the
need for an iron chelator in the pentapeptide series.
本文报道了基于组蛋白赖
氨酸去甲基酶K
DM4C的底物截短版本的修饰五肽的设计与合成,并研究了它们对K
DM4C的抑制活性。通过修饰对应于组蛋白3第9位赖
氨酸(H3K9)的赖
氨酸残基,设计并合成了三个不同系列的肽。其中一个系列包含N-酰化的H3K9,另外两个系列通过点击
化学在此位置引入三唑以实现头部基团的便捷变化。点击反应与自由
氨基酸兼容,这一反应在含有
叠氮基的去保护五肽上进行,展示了一种高度便捷和集中的合成策略,用于制造基于底物的
抑制剂。14个五肽中的一个显示出对K
DM4C的抑制活性,这表明五肽系列中需要
铁螯合剂。