GSDMA is a pore-forming protein that executes pyroptosis, a programmed necrotic cell death mechanism critical for host defense 1. Upon cleavage by the Streptococcus pyogenes protease SpeB at Gln246, GSDMA's N-terminal fragment translocates to the plasma membrane where it binds acidic phospholipids including cardiolipin and phosphatidylserine 2. The activated N-terminus oligomerizes to form 10-14 nanometer pores containing approximately 16 protomers 3. These pores permeabilize cell membranes, triggering pyroptosis and releasing pro-inflammatory cytokines that recruit immune cells to infection sites 1. In the context of GAS infection, GSDMA serves as both a sensor and substrate of the bacterial virulence factor SpeB and as an effector molecule, providing a one-molecule mechanism for host recognition and pathogen control 2. Genetic deficiency of Gsdma1 in mice blunts immune responses to GAS, resulting in uncontrolled bacterial dissemination and death, demonstrating GSDMA's essential role in protective immunity 2. However, excessive GSDMA-mediated pyroptosis contributes to inflammatory pathologies including sepsis and tissue damage 1. Thus GSDMA represents a double-edged immune response: beneficial for acute pathogen control but potentially pathogenic when dysregulated.