Crystallization and preliminary X-ray crystallographic studies of dipeptidyl peptidase 11 from Porphyromonas gingivalis

Dipeptidyl peptidase 11 from Porphyromonas gingivalis (PgDPP11) preferentially cleaves substrate peptides with Asp and Glu at the P1 position [NH₂–P2–P1(Asp/Glu)–P1′–P2′…]. For crystallographic studies, PgDPP11 was overproduced in Escherichia coli, purified and crystallized using the hanging-drop vapour-diffusion method. X-ray diffraction data to 1.82 Å resolution were collected from an orthorhombic crystal form belonging to space group C222₁, with unit-cell parameters a = 99.33, b = 103.60, c = 177.33 Å. Structural analysis by the multi-wavelength anomalous diffraction method is in progress.