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6APV

Trypanosoma brucei hypoxanthine guanine phosphoribosyltransferase in complex with [(2-{[2-(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)ethyl][(E)-2-phosphonoethenyl]amino}ethoxy)methyl]phosphonic acid

Summary for 6APV
Entry DOI10.2210/pdb6apv/pdb
DescriptorHypoxanthine-guanine phosphoribosyltransferase, [(2-{[2-(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)ethyl][(E)-2-phosphonoethenyl]amino}ethoxy)methyl]phosphonic acid, MAGNESIUM ION, ... (5 entities in total)
Functional Keywordstrypanosoma brucei, purine salvage, acyclic nucleoside biphosphonate, transferase
Biological sourceTrypanosoma brucei brucei
Cellular locationCytoplasm: Q07010
Total number of polymer chains4
Total formula weight99259.10
Authors
Teran, D.,Guddat, L.W. (deposition date: 2017-08-18, release date: 2018-03-14, Last modification date: 2023-10-04)
Primary citationDolezelova, E.,Teran, D.,Gahura, O.,Kotrbova, Z.,Prochazkova, M.,Keough, D.,Spacek, P.,Hockova, D.,Guddat, L.,Zikova, A.
Evaluation of the Trypanosoma brucei 6-oxopurine salvage pathway as a potential target for drug discovery.
PLoS Negl Trop Dis, 12:e0006301-e0006301, 2018
Cited by
PubMed Abstract: Due to toxicity and compliance issues and the emergence of resistance to current medications new drugs for the treatment of Human African Trypanosomiasis are needed. A potential approach to developing novel anti-trypanosomal drugs is by inhibition of the 6-oxopurine salvage pathways which synthesise the nucleoside monophosphates required for DNA/RNA production. This is in view of the fact that trypanosomes lack the machinery for de novo synthesis of the purine ring. To provide validation for this approach as a drug target, we have RNAi silenced the three 6-oxopurine phosphoribosyltransferase (PRTase) isoforms in the infectious stage of Trypanosoma brucei demonstrating that the combined activity of these enzymes is critical for the parasites' viability. Furthermore, we have determined crystal structures of two of these isoforms in complex with several acyclic nucleoside phosphonates (ANPs), a class of compound previously shown to inhibit 6-oxopurine PRTases from several species including Plasmodium falciparum. The most potent of these compounds have Ki values as low as 60 nM, and IC50 values in cell based assays as low as 4 μM. This data provides a solid platform for further investigations into the use of this pathway as a target for anti-trypanosomal drug discovery.
PubMed: 29481567
DOI: 10.1371/journal.pntd.0006301
PDB entries with the same primary citation
Experimental method
X-RAY DIFFRACTION (1.993 Å)
Structure validation

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