Spore surface protein

Spore surface proteins are a collective term describing the ensemble of structural proteins that compose the outermost layers (spore coat, crust, exosporium) of bacterial endospores, primarily in species such as Bacillus and Clostridium. These proteins include several distinct types—such as coat proteins (e.g., CotA, CotB, CotC, CotZ), crust proteins (e.g., CgeA, CotX, CotY), and exosporium proteins (e.g., BclA, BclB, ExsC)—each serving specific roles in spore architecture, environmental resilience, and interactions with external surfaces. They are not a single molecular entity but a structurally and genetically diverse set, whose presence renders spores highly resistant to chemical, enzymatic, and physical challenges[1][3][5][8]. In some pathogenic bacteria, spore surface proteins help mediate the initial host-pathogen interactions. In biotechnology, these proteins are exploited to display vaccines, enzymes, and other functional molecules on robust spore surfaces for various applications, but there are no clinically approved drugs directly targeting these proteins[2][5][6][8]. Because "spore surface proteins" refers to a large and heterogeneous group rather than a defined molecular target, this entry does not fit a canonical therapeutic target format and should be used with caution for structured data purposes.

Other names

Spore coat proteinSpore crust proteinExosporium proteinSpore outer layer protein

Not applicable for endogenous proteins. For biotechnological constructs: display and presentation of peptides/proteins/vaccines for immunization or catalysis.