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Gingipains

Molecular classification: Enzyme, Cysteine proteinases, Clan CD peptidases

Overview

Gingipains are a family of cysteine proteinases secreted by *Porphyromonas gingivalis*. They are virulence factors involved in adherence, tissue destruction, immune modulation, and nutrient acquisition. They are classified as arginine-specific (RgpA, RgpB) or lysine-specific (Kgp), based on their substrate specificity. Gingipains are implicated in periodontal disease and other systemic conditions like Alzheimer's disease, Parkinson's disease, cardiovascular disease, and type 2 diabetes mellitus. They represent a potential therapeutic target for treating these diseases.

Other names: Arginine-specific gingipains (Rgp)Lysine-specific gingipain (Kgp)RgpARgpB

Mechanism of action

Inhibition of cysteine proteinase activity by targeting the active site.

Biological functions

Adherence and colonizationHaemagglutinationHaemolysisImmune modulationTissue destructionNutrient acquisitionFibrinogenolytic activityProtein degradation

Disease associations

Periodontal diseaseAlzheimer's diseaseParkinson's diseaseCardiovascular diseaseType 2 diabetes mellitus

Safety considerations

Potential for off-target effects due to structural similarities with other cysteine peptidases like caspases.Potential for disrupting the oral microbiome.Development of resistance.

Interacting drugs

D-Phe-Phe-Arg-chloromethylketone

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