Porphyromonas gingivalis gingipain (Gingipain)

Gingipains are a group of essential cysteine proteases secreted by the anaerobic bacterium Porphyromonas gingivalis, which is recognized as a keystone pathogen in chronic periodontitis (Potempa et al., 2003). These enzymes, categorized as Arg-gingipain (Rgp) and Lys-gingipain (Kgp) based on their cleavage specificity, are vital for the bacterium's survival as they facilitate nutrient acquisition through protein degradation, mediate tissue attachment, and subvert the host immune response (Guo et al., 2010). Beyond oral health, gingipains have been identified in the brains of patients with Alzheimer's disease, where they are hypothesized to contribute to neurodegeneration by cleaving tau and other neuronal proteins (Dominy et al., 2019). Therapeutic strategies focus on small-molecule inhibitors designed to block the proteolytic activity of these toxins to treat both periodontal disease and associated systemic conditions like Alzheimer's. While clinical trials for inhibitors like atuzaginstat (COR388) have faced challenges regarding liver toxicity, gingipains remain a significant target for addressing the bacterial hypothesis of neurodegenerative and inflammatory diseases (Cortexyme, 2022).

Other names

Arg-gingipainLys-gingipainRgpARgpBKgpCysteine proteaseGingipain RGingipain KP. gingivalis cysteine protease

Small molecule inhibition of the catalytic activity of Arg-gingipain and Lys-gingipain cysteine proteases to prevent bacterial survival and host tissue damage (Dominy et al., 2019).