Other Latrodectus venom proteins

Other Latrodectus venom proteins refers to the complex mixture of bioactive polypeptides found in widow spider venom, excluding the primary mammalian-specific neurotoxin, alpha-latrotoxin. This group encompasses a variety of latrotoxins that specifically target insects (latroinsectotoxins) or crustaceans (latrocrustatoxins), as well as low-molecular-weight proteins known as latrodectins (Grishin, 1998; Ushkaryov et al., 2008). These proteins often work synergistically; for instance, latrodectins are believed to enhance the pore-forming capabilities of larger latrotoxins (Garb & Hayashi, 2013). The venom also contains ancillary enzymes like hyaluronidase, which degrades the extracellular matrix to facilitate toxin diffusion, and various proteases (He et al., 2013). While alpha-latrotoxin is the main agent responsible for the clinical syndrome of latrodectism in humans, these other proteins contribute to the overall toxicity and evolutionary success of the venom across different prey types (Isbister & Fan, 2011). From a therapeutic perspective, these proteins are the collective targets of antivenoms, which employ polyclonal antibodies to bind and neutralize the venom's diverse components (Isbister & Fan, 2011).

Other names

LatrotoxinsLatrodectinsWidow spider venom componentsLatroinsectotoxinsLatrocrustatoxinsLatrodectus toxins

Antivenom antibodies bind to the various venom proteins, preventing them from interacting with host cell membranes, forming pores, or binding to physiological receptors, thereby neutralizing their toxic effects.