Download MendeleyStructural and kinetic characterization of Porphyromonas gingivalis glutaminyl cyclase.
Lamers, S., Feng, Q., Cheng, Y., Yu, S., Sun, B., Lukman, M., Jiang, J., Ruiz-Carrillo, D.(2021) Biol Chem 402: 759-768
- PubMed: 33823093
- DOI: https://doi.org/10.1515/hsz-2020-0298
- Primary Citation of Related Structures:
7CJE, 7CJG - PubMed Abstract:
Porphyromonas gingivalis is a bacterial species known to be involved in the pathogenesis of chronic periodontitis, that more recently has been as well associated with Alzheimer's disease. P. gingivalis expresses a glutaminyl cyclase (PgQC) whose human ortholog is known to participate in the beta amyloid peptide metabolism. We have elucidated the crystal structure of PgQC at 1.95 Å resolution in unbound and in inhibitor-complexed forms. The structural characterization of PgQC confirmed that PgQC displays a mammalian fold rather than a bacterial fold. Our biochemical characterization indicates that PgQC uses a mammalian-like catalytic mechanism enabled by the residues Asp 149 , Glu 182 , Asp 183 , Asp 218 , Asp 267 and His 299 . In addition, we could observe that a non-conserved Trp 193 may drive differences in the binding affinity of ligands which might be useful for drug development. With a screening of a small molecule library, we have identified a benzimidazole derivative rendering PgQC inhibition in the low micromolar range that might be amenable for further medicinal chemistry development.
Organizational Affiliation:
Department of Biological Sciences, School of Science, Xi'an Jiaotong-Liverpool University, Suzhou, Jiangsu215123, China.
