6LH9

Quadruple mutant (N51I+C59R+S108N+I164L) plasmodium falciparum dihydrofolate reductase-thymidylate synthase (PfDHFR-TS) complexed with compound 46 and NADPH

6LH9 の概要

• エントリーDOI: 10.2210/pdb6lh9/pdb
• 分子名称: Bifunctional dihydrofolate reductase-thymidylate synthase, PHOSPHATE ION, 2-[[4,6-bis(azanyl)-2,2-dimethyl-1,3,5-triazin-1-yl]oxy]-N-(4-chlorophenyl)ethanamide, ... (5 entities in total)
• 機能のキーワード: inhinitor, antifolate, dyhydrofolate reductase, plasmodium falciparum, antibiotic, oxidoreductase
• 由来する生物種: Plasmodium falciparum (malaria parasite P. falciparum)
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 146146.58

構造登録者

Vanichtanankul, J.,Vitsupakorn, D. (登録日: 2019-12-07, 公開日: 2020-12-09, 最終更新日: 2023-11-22)

主引用文献

Kamchonwongpaisan, S.,Charoensetakul, N.,Srisuwannaket, C.,Taweechai, S.,Rattanajak, R.,Vanichtanankul, J.,Vitsupakorn, D.,Arwon, U.,Thongpanchang, C.,Tarnchompoo, B.,Vilaivan, T.,Yuthavong, Y.
Flexible diaminodihydrotriazine inhibitors of Plasmodium falciparum dihydrofolate reductase: Binding strengths, modes of binding and their antimalarial activities.
Eur.J.Med.Chem., 195:112263-112263, 2020

PubMed Abstract: A series of flexible diaminodihydrotriazines or cycloguanil (Cyc) analogues are developed and shown to inhibit P. falciparum dihydrofolate reductase (PfDHFR) of the wild type or those carrying either single (S108N), double (C59R + S108N and A16V + S108T), triple (N51I + C59R + S108N and C59R + S108N + I164L) or quadruple (N51I + C59R + S108N + I164L) mutations, responsible for antifolate resistance. The flexibility of the side chain at position N has been included in the design so as to avoid unfavourable steric interaction with the side chain of residue 108 of the resistant mutants. The inhibition constants of many inhibitors for the mutant enzymes are in the low nanomolar region. Regaining of drug binding efficacies was achieved with both A16V and S108N series of mutants. X-ray studies of some enzyme-inhibitor complexes designed for optimal interaction with the mutant enzymes reveal the modes of binding in line with the K values. A number of these compounds show excellent antimalarial activities against resistant P. falciparum bearing the mutant enzymes, and exhibit low cytotoxicity to mammalian cells, making them good candidates for further development as antimalarial drugs.

PubMed: 32294614
DOI: 10.1016/j.ejmech.2020.112263

実験手法

X-RAY DIFFRACTION (2.644 Å)