Linear free energy relationship studies of enzyme active site binding: thymidylate synthase
作者:George Chang、Douglas Schwepler、Charles J. Decedue、Jan Balzarini、Erik De Clercq、Mathias P. Mertes
DOI:10.1021/jm00401a013
日期:1988.6
The requirements for active-site binding of thymidylate synthase from three sources, Lactobacillus casei, murine leukemia L1210, and human lymphoblast (Molt/4F), were investigated by analyzing the binding of a series of 5-(p-substituted phenyl)-2'-deoxyuridylates (N1-substituted 5-aryl-2, 4-dioxopyrimidines) to the enzyme. Multiple regression analysis revealed that an increase in electron density of
通过分析一系列5-(p-取代苯基)-2的结合作用,研究了三种来源的酪蛋白合酶活性位点结合的需求:干酪乳杆菌,鼠白血病L1210和人淋巴母细胞(Molt / 4F) '-脱氧尿苷酸(N1-取代的5-芳基-2、4-二氧代嘧啶)成为酶。多元回归分析表明,杂环和疏水取代基的电子密度增加会增强亲和力。生物学结果与光谱数据的相关性表明,氧原子上较高的电子密度是结合力增加的原因。这些结果支持阳离子结合位点和疏水区的存在。另外,结果表明结合和催化的电子要求发生了不寻常的逆转。