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X-ray structure of human glutamate carboxypeptidase II (GCPII) in complex with a glutamyl sulfamide inhibitor CJC47X-ray structure of human glutamate carboxypeptidase II (GCPII) in complex with a glutamyl sulfamide inhibitor CJC47
Structural highlights
FunctionFOLH1_HUMAN Has both folate hydrolase and N-acetylated-alpha-linked-acidic dipeptidase (NAALADase) activity. Has a preference for tri-alpha-glutamate peptides. In the intestine, required for the uptake of folate. In the brain, modulates excitatory neurotransmission through the hydrolysis of the neuropeptide, N-aceylaspartylglutamate (NAAG), thereby releasing glutamate. Isoform PSM-4 and isoform PSM-5 would appear to be physiologically irrelevant. Involved in prostate tumor progression. Also exhibits a dipeptidyl-peptidase IV type activity. In vitro, cleaves Gly-Pro-AMC. Publication Abstract from PubMedThe sulfonamide function is used extensively as a general building block in various inhibitory scaffolds and, more specifically, as a zinc-binding group (ZBG) of metalloenzyme inhibitors. Here, we provide biochemical, structural, and computational characterization of a metallopeptidase in complex with inhibitors, where the mono- and bisubstituted sulfamide functions are designed to directly engage zinc ions of a bimetallic enzyme site. Structural data showed that while monosubstituted sulfamides coordinate active-site zinc ions via the free negatively charged amino group in a canonical manner, their bisubstituted counterparts adopt an atypical binding pattern divergent from expected positioning of corresponding tetrahedral reaction intermediates. Accompanying quantum mechanics calculations revealed that electroneutrality of the sulfamide function is a major factor contributing to the markedly lower potency of bisubstituted compounds by considerably lowering their interaction energy with the enzyme. Overall, while bisubstituted uncharged sulfamide functions can bolster favorable pharmacological properties of a given inhibitor, their use as ZBGs in metalloenzyme inhibitors might be less advantageous due to their suboptimal metal-ligand properties. Structural, Biochemical, and Computational Characterization of Sulfamides as Bimetallic Peptidase Inhibitors.,Novakova Z, Tehrani ZA, Jurok R, Motlova L, Kutil Z, Pavlicek J, Shukla S, Choy CJ, Havlinova B, Baranova P, Berkman CE, Kuchar M, Cerny J, Barinka C J Chem Inf Model. 2024 Feb 12;64(3):1030-1042. doi: 10.1021/acs.jcim.3c01542. , Epub 2024 Jan 15. PMID:38224368[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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