Structure and mechanism of cysteine peptidase gingipain K (Kgp), a major virulence factor of Porphyromonas gingivalis in periodontitis - de Diego, I; Veillard, F; Sztukowska, M N; Guevara, T; Potempa, B; Pomowski, A; Huntington, J Á; Potempa, J; Gomis-Rüth, F X (J Biol Chem, 2014)