Journal
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
Volume 139, Issue -, Pages 482-491Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ejmech.2017.08.024
Keywords
Dipeptidyl peptidase 4; Peptidase inhibitor; Porphyromonas gingivalis; Biofilm; Dipeptidyl peptidase 9
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Funding
- Fund for Scientific Research (FWO-Flanders, Belgium) [G.0173.09N]
- Agency for Innovation by Science and Technology in Flanders (IWT, Belgium) [SBO 50164]
- University of Leuven [IOF/KP/09/003]
- EU [223077]
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The Gram-negative anaerobe Porphyromonas gingivalis is associated with chronic periodontitis. Clinical isolates of P. gingivalis strains with high dipeptidyl peptidase 4 (DPP4) expression also had a high capacity for biofilm formation and were more infective. The X-ray crystal structure of P. gingivalis DPP4 was solved at 2.2 angstrom resolution. Despite a sequence identity of 32%, the overall structure of the dimer was conserved between P. gingivalis DPP4 and mammalian orthologues. The structures of the substrate binding sites were also conserved, except for the region called S2-extensive, which is exploited by specific human DPP4 inhibitors currently used as antidiabetic drugs. Screening of a collection of 450 compounds as inhibitors revealed a structure-activity relationship that mimics in part that of mammalian DPP9. The functional similarity between human and bacterial DPP4 was confirmed using 124 potential peptide substrates. (C) 2017 Elsevier Masson SAS. All rights reserved.
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