Download MendeleyReverse Fosmidomycin Analogs as Bisubstrate Inhibitors: Binding Mode Elucidation and Mechanistic Insights.
Hofmann, S., Takada, S., Illarionov, B., de Carvalho, L.P., Ozawa, S.I., Gangnus, T., Knak, T., Abdullaziz, M.A., Wladarz, N., Bacher, A., Sakamoto, Y., Burckhardt, B.B., Held, J., Fischer, M., Tanaka, N., Kurz, T.(2026) J Med Chem 69: 11844-11871
- PubMed: 42089510 Search on PubMed
- DOI: https://doi.org/10.1021/acs.jmedchem.5c03192
- Primary Citation Related Structures:
9V5U, 9V5V, 9V5W, 9V5X, 9V5Y, 9V5Z - PubMed Abstract:
Inhibitors of the 1-deoxy- d -xylulose 5-phosphate reductoisomerase (DXR), an enzyme of the nonmevalonate pathway, represent a promising class of antiplasmodial compounds, as DXR is essential for human pathogens but absent in their host. The natural product fosmidomycin was the first clinical DXR inhibitor, however high rates of recrudescence attributed to the polar phosphonic acid group have prevented progression beyond phase II clinical trials. Herein, lipophilic N -benzamidoalkyl and N -phthalimidoalkyl substituents were introduced into reverse α-phenyl fosmidomycin derivatives to mimic the nicotinamide moiety of the NADPH cofactor and enhance antiplasmodial activity. Elongation of the alkyl linker markedly improved enzymatic inhibition ( 15e Pf DXR IC 50 = 4.3 nM) and antiplasmodial activity ( 16e Pf Dd2 IC 50 = 0.28 μM). Mode of inhibition studies showed competitive inhibition with the DXR substrate and the cofactor NADPH ( 16e K i = 0.068 μM). Co-crystallization with the Pf DXR enzyme revealed that the introduced residues bind within the NADPH binding site.
- Institute of Pharmaceutical and Medicinal Chemistry, Heinrich Heine University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany.
Organizational Affiliation:
