Targeting species specific amino acid residues: Design, synthesis and biological evaluation of 6-substituted pyrrolo[2,3-d]pyrimidines as dihydrofolate reductase inhibitors and potential anti-opportunistic infection agents
作者:Khushbu Shah、Xin Lin、Sherry F. Queener、Vivian Cody、Jim Pace、Aleem Gangjee
DOI:10.1016/j.bmc.2018.04.032
日期:2018.5
target based design was carried out with the X-ray crystal structure of human dihydrofolate reductase (hDHFR) and the homology model of Pneumocystis jirovecii DHFR (pjDHFR). Using variation of amino acids such as Met33/Phe31 (in pjDHFR/hDHFR) that affect the binding of inhibitors due to their distinct positive or negative steric effect at the active binding site of the inhibitor, we designed a series of
为了将曲美曲塞(TMQ)或吡利特辛(PTX)的效力与甲氧苄氨嘧啶(TMP)的物种选择性结合在一起,使用人二氢叶酸还原酶(hDHFR)的X射线晶体结构和肺孢子虫的同源模型进行了基于靶点的设计jirovecii DHFR(pjDHFR)。利用诸如Met33 / Phe31(在pjDHFR / hDHFR中)这样的氨基酸变异(由于它们在抑制剂的活性结合位点具有明显的正或负立体效应)而影响抑制剂的结合,我们设计了一系列取代的吡咯并[2] ,3-d]嘧啶。最好的类似物显示出比PTX更好的效价(IC50),对pjDHFR的选择性比对hDHFR高,其中4种对pjDHFR的选择性为24倍。