Peptidyl 3-substituted 1-hydroxyureas as isosteric analogues of succinylhydroxamate MMP inhibitors
作者:Cristina Campestre、Paolo Tortorella、Mariangela Agamennone、Serena Preziuso、Alessandro Biasone、Elisa Nuti、Armando Rossello、Carlo Gallina
DOI:10.1016/j.ejmech.2007.07.002
日期:2008.5
displays IC(50) in the range of nM vs MMP-1, -3, -7 and sub-nM vs MMP-2, -8, and -9. The peptidyl 1-hydroxyurea 1a attained an IC(50) of 20 microM vs MMP-9, and substantially approaches inhibition of known N-hydroxyureas based on aminoacids or peptides against other zinc metalloenzymes and non-peptidic N-hydroxyureas against MMPs. Strong preference of the O-N1-C=O unit for the antiperiplanar amide bond
为了在MMP抑制剂的设计中评价N-羟基脲作为锌结合基团,通过非对映二肽H-Leu-Phe-NHMe和HD-Leu-Phe-NHMe的N-羟基氨基甲酰化制备了两个肽基1-羟基脲。肽基1-羟基脲比母体肽更有效,但比等排性(R)-琥珀酰异羟肟酸酯类似物弱得多(4-5个数量级),后者在nM对MMP-1范围内显示IC(50),- 3,-7和sub-nM对MMP-2,-8和-9。与MMP-9相比,肽基1-羟基脲1a的IC(50)为20 microM,并且基本上接近基于氨基酸或肽的已知N-羟基脲对其他锌金属酶和非肽N-羟基脲对MMP的抑制作用。O-N1-C = O单元强烈倾向于反周酰胺键构象,这似乎是更有效的锌螯合的主要限制。肽基1-羟基脲在N3处的甲基化,以促进锌螯合所需的上平面O-N1-C = O构象并提高亲和力,导致不希望的分子内反应使甲基咪唑烷-2,4-二酮释放,使人想起埃德曼肽降解。