5GN7

Crystal structure of alternative oxidase from Trypanosoma brucei brucei complexed with cumarin derivative-17

Summary for 5GN7

• Entry DOI: 10.2210/pdb5gn7/pdb
• Related: 3VV9 5GN5 5GN6 5GN9
• Descriptor: Alternative oxidase, mitochondrial, FE (III) ION, 4-[[4-(4-methoxyphenyl)piperazin-1-yl]methyl]-7,8-bis(oxidanyl)chromen-2-one, ... (4 entities in total)
• Functional Keywords: alternative oxidase, inhibitor, drug, african trypanosomes, oxido-reductase, transferase
• Biological source: Trypanosoma brucei brucei
• Total number of polymer chains: 4
• Total formula weight: 151453.35

Authors

Balogun, E.O.,Inaoka, D.K.,Shiba, T.,Tsuge, T.,May, B.,Sato, T.,Kido, Y.,Takeshi, N.,Aoki, T.,Honma, T.,Tanaka, A.,Inoue, M.,Matsuoka, S.,Michels, P.A.M.,Watanabe, Y.,Moore, A.L.,Harada, S.,Kita, K. (deposition date: 2016-07-19, release date: 2017-07-26, Last modification date: 2023-11-08)

Primary citation

Balogun, E.O.,Inaoka, D.K.,Shiba, T.,Tsuge, C.,May, B.,Sato, T.,Kido, Y.,Nara, T.,Aoki, T.,Honma, T.,Tanaka, A.,Inoue, M.,Matsuoka, S.,Michels, P.A.M.,Watanabe, Y.I.,Moore, A.L.,Harada, S.,Kita, K.
Discovery of trypanocidal coumarins with dual inhibition of both the glycerol kinase and alternative oxidase ofTrypanosoma brucei brucei.
Faseb J., 33:13002-13013, 2019

PubMed Abstract: African trypanosomiasis, sleeping sickness in humans or nagana in animals, is a potentially fatal neglected tropical disease and a threat to 65 million human lives and 100 million small and large livestock animals in sub-Saharan Africa. Available treatments for this devastating disease are few and have limited efficacy, prompting the search for new drug candidates. Simultaneous inhibition of the trypanosomal glycerol kinase (TGK) and trypanosomal alternative oxidase (TAO) is considered a validated strategy toward the development of new drugs. Our goal is to develop a TGK-specific inhibitor for coadministration with ascofuranone (AF), the most potent TAO inhibitor. Here, we report on the identification of novel compounds with inhibitory potency against TGK. Importantly, one of these compounds (compound 17) and its derivatives (17a and 17b) killed trypanosomes even in the absence of AF. Inhibition kinetics revealed that derivative 17b is a mixed-type and competitive inhibitor for TGK and TAO, respectively. Structural data revealed the molecular basis of this dual inhibitory action, which, in our opinion, will aid in the successful development of a promising drug to treat trypanosomiasis. Although the EC of compound 17b against trypanosome cells was 1.77 µM, it had no effect on cultured human cells, even at 50 µM.-Balogun, E. O., Inaoka, D. K., Shiba, T., Tsuge, C., May, B., Sato, T., Kido, Y., Nara, T., Aoki, T., Honma, T., Tanaka, A., Inoue, M., Matsuoka, S., Michels, P. A. M., Watanabe, Y.-I., Moore, A. L., Harada, S., Kita, K. Discovery of trypanocidal coumarins with dual inhibition of both the glycerol kinase and alternative oxidase of

PubMed: 31525300
DOI: 10.1096/fj.201901342R

Experimental method

X-RAY DIFFRACTION (3.2 Å)