Disulfide bond in mucin glycoprotein

**Disulfide bonds in mucin glycoproteins** refer to the covalent links formed between cysteine residues within and between mucin monomers, leading to the formation and stabilization of high-molecular-weight mucin polymers. These disulfide bonds are integral to the gel-forming properties of mucins and are essential for building the viscoelastic mucus barriers that protect epithelial surfaces of the respiratory, gastrointestinal, and other mucosal tissues. The bonds often occur at cysteine-rich terminal regions of mucins, facilitating oligomerization and creating a resistant network to withstand enzymatic degradation and mechanical stress[1][2][3][5][8][9]. Although critical for mucin structure and function, **disulfide bonds themselves are not stand-alone therapeutic targets or discrete molecules/receptors**, but rather specific chemical cross-links within mucin proteins. They play a pivotal role in mucin polymer assembly and mucus barrier resilience, but they are not considered a traditional drug target such as a receptor, enzyme, or transporter[1][2][3][5].\n\n**Note:**\nThis entry is "incorrect" as a target since it refers only to a chemical bond within a protein family (mucins) and not a specific gene, protein, receptor, or classical molecular target. More structured information would require specifying a mucin subtype (e.g., "Mucin-2" or "MUC2") as the canonical target[2][5][8].

Other names

Disulfide bonds in mucinsMucin disulfide cross-links