6-Hydrophobic aromatic substituent pyrimethamine analogues as potential antimalarials for pyrimethamine-resistant Plasmodium falciparum
作者:Siriporn Saepua、Karoon Sadorn、Jarunee Vanichtanankul、Tosapol Anukunwithaya、Roonglawan Rattanajak、Danoo Vitsupakorn、Sumalee Kamchonwongpaisan、Yongyuth Yuthavong、Chawanee Thongpanchang
DOI:10.1016/j.bmc.2019.115158
日期:2019.12
carboxyl substituted on the aromatic ring exhibited good inhibition to the QM enzyme and also showed effective antimalarial activities against resistant P. falciparum bearing the mutant enzymes with relatively low cytotoxicity to mammalian cells. The X-ray crystallographic analysis of the enzyme-inhibitor complexes suggested that the hydrophobic substituent at 6-position was accommodated well in the hydrophobic
合成了具有各种柔性6位取代基的PYR的des -Cl(未取代)和m- Cl苯基类似物系列,并研究了其与高抗性四重突变体(QM)DHFR的结合亲和力。带有在芳香环上取代的末端羧基的4个原子接头的衍生物对QM酶表现出良好的抑制作用,并且还显示出对耐药性恶性疟原虫的有效抗疟活性。带有对哺乳动物细胞具有相对低细胞毒性的突变酶。酶抑制剂复合物的X射线晶体学分析表明,6位疏水取代基被很好地容纳在疏水口袋中,柔性接头的最佳长度可以有效地促进末端羧基与关键氨基的结合残基Arg59和Arg122。