Discovery of Potent and Selective Inhibitors of Toxoplasma gondii Thymidylate Synthase for Opportunistic Infections
| Autor: | Nilesh Zaware, Karen S. Anderson, Ravi Kumar Vyas Devambatla, Aleem Gangjee, Hitesh Sharma, Sherry F. Queener, Jie Yang |
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| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
biology Opportunistic infection Organic Chemistry Toxoplasma gondii Active site Reductase medicine.disease biology.organism_classification Biochemistry Virology Thymidylate synthase Toxoplasmosis Enzyme chemistry Cell culture parasitic diseases Drug Discovery medicine biology.protein |
| Zdroj: | ACS Medicinal Chemistry Letters. 4:1148-1151 |
| ISSN: | 1948-5875 |
| DOI: | 10.1021/ml400208v |
| Popis: | Infection by the parasite Toxoplasma gondii (tg) can lead to toxoplasmosis in immunocompromised patients such as organ transplant, cancer, and HIV/AIDS patients. The bifunctional thymidylate synthase-dihydrofolate reductase (TS-DHFR) enzyme is crucial for nucleotide synthesis in T. gondii and represents a potential target to combat T. gondii infection. While species selectivity with drugs has been attained for DHFR, TS is much more conserved across species, and specificity is significantly more challenging. We discovered novel substituted-9H-pyrimido[4,5-b]indoles 1–3 with single-digit nanomolar Ki for tgTS, two of which, 2 and 3, are 28- and 122-fold selective over human TS (hTS). The synthesis of these compounds, and their structures in complex with tgTS-DHFR are presented along with binding measurements and cell culture data. These results show, for the very first time, that, in spite of the high degree of conservation of active site residues between hTS and the parasite TS, specificity has been accomp... |
| Databáze: | OpenAIRE |
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