7kdr
Crystal structure of Escherichia coli HPPK in complex with bisubstrate inhibitor HP-75Crystal structure of Escherichia coli HPPK in complex with bisubstrate inhibitor HP-75
Structural highlights
FunctionPublication Abstract from PubMed6-Hydroxymethyl-7,8-dihydropterin pyrophosphokinase (HPPK) is a key enzyme in the folate biosynthesis pathway. It catalyzes pyrophosphoryl transfer from ATP to 6-hydroxymethyl-7,8-dihydropterin (HP). HPPK is essential for microorganisms but absent in mammals; therefore, it is an attractive target for developing novel antimicrobial agents. Previously, based on our studies of the structure and mechanism of HPPK, we created first-generation bisubstrate inhibitors by linking 6-hydroxymethylpterin to adenosine through phosphate groups, and developed second-generation inhibitors by replacing the phosphate bridge with a linkage that contains a piperidine moiety. Here, we report third-generation inhibitors designed based on the piperidine-containing inhibitor, mimicking the transition state. We synthesized two such inhibitors, characterized their protein-binding and enzyme inhibition properties, and determined their crystal structures in complex with HPPK, advancing the development of such bisubstrate analog inhibitors. Bisubstrate inhibitors of 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase: Transition state analogs for high affinity binding.,Shi G, Shaw GX, Zhu F, Tarasov SG, Ji X Bioorg Med Chem. 2021 Jan 1;29:115847. doi: 10.1016/j.bmc.2020.115847. Epub 2020 , Nov 9. PMID:33199204[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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