Pneumolysin
![3D structure of pneumolysin](/Images/godic/202502/03/Pneumolysin-protein-3d-structure-RCSB0612.jpg")
Pneumolysin is a putative virulence factor of the gram-positive bacteria Streptococcus pneumoniae.
It is a pore-forming toxin of 53 kDa composed of 471 amino acids. It has a range of biological activity, including the ability to lyse and interfere with the function of cells and soluble molecules of the immune system.