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Mucin Polymer Disulfide Bonds
- Molecular classification
- Post-translational modification, Protein-protein interaction
01
Overview
Mucin polymer disulfide bonds are covalent linkages formed between cysteine residues in mucin glycoproteins, enabling the assembly of large, viscoelastic networks that constitute mucus gels. These bonds are essential for the structural integrity and function of secreted gel-forming mucins such as MUC2, MUC5AC, and MUC5B. They contribute to epithelial protection, pathogen trapping, and lubrication. Aberrant disulfide bond formation is implicated in diseases like cystic fibrosis and COPD.
- Other names
- Mucin crosslinkingMucin disulfide bridgesMUC2 disulfide bondsMUC5AC disulfide bondsMUC5B disulfide bonds
02
Biological functions
Mucus network formationViscoelasticity regulationEpithelial protectionPathogen trappingLubrication
03
Disease associations
Cystic Fibrosis (CF)Chronic Obstructive Pulmonary Disease (COPD)Inflammatory Bowel Disease (IBD)Asthma
04
Safety considerations
Disruption of disulfide bond formation can lead to altered mucus properties and disease.
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