Synthesis and Characterisation of Substrate-Based Peptides as Inhibitors of Histone Demethylase KDM4C
作者:Simon D. Nielsen、Ulrike Leurs、Magnus Bergner、Silvia A. Barris、Kanchan Devkota、Kamilla Meyer,、Daniella Iaria、Jack McCaughan、Brian Lohse、Jesper L. Kristensen、Rasmus P. Clausen
DOI:10.2174/0929866523666160613210831
日期:2016.8.8
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KDM4C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KDM4C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KDM4C的抑制活性,这表明五肽系列中需要铁螯合剂。