别名 FLJ39120、gasdermin A、Gasdermin-1 + [8] |
简介 Pore-forming protein that causes membrane permeabilization and pyroptosis (PubMed:17471240, PubMed:27281216, PubMed:35110732, PubMed:35545676). Released upon cleavage by S.pyogenes effector protein SpeB, and binds to membrane inner leaflet lipids (PubMed:27281216, PubMed:35110732, PubMed:35545676). Homooligomerizes within the membrane and forms pores of 10-15 nanometers (nm) of inner diameter, triggering pyroptosis (PubMed:27281216, PubMed:35110732, PubMed:35545676). Pyroptosis triggers the elimination of the infected skin cell, depriving the pathogen of its protective niche, while inducing an inflammatory response (PubMed:35110732, PubMed:35545676). This ultimately prevents bacterial penetration of the epithelial barrier and a subsequent systemic dissemination of the pathogen (PubMed:35110732, PubMed:35545676). Binds to cardiolipin and other acidic phospholipids, such as phosphatidylserine, which mediate its targeting to the inner leaflet membrane (PubMed:27281216, PubMed:35110732).
This form constitutes the precursor of the pore-forming protein and acts as a sensor of infection: upon infection by S.pyogenes, specifically cleaved by S.pyogenes effector protein SpeB in epithelial cells, releasing the N-terminal moiety (Gasdermin-A, N-terminal) that binds to membranes and forms pores, triggering pyroptosis. |