| Post Translational Modifications | C-, O- and N-glycosylated. O-glycosylated on the second and last Thr of the Thr-/Ser-rich tandem repeats TTPSPVPTTSTTSA. One form of glycosylation is also known as Lewis B (LeB) blood group antigen, a tetrasaccharide consisting of N-acetylglucosamine having a fucosyl residue attached. It has a role as an epitope and antigen and functions as a receptor for H.pylori binding and facilitates infection. C-mannosylation in the Cys-rich subdomains may be required for proper folding of these regions and for export from the endoplasmic reticulum during biosynthesis. Proteolytic cleavage in the C-terminal is initiated early in the secretory pathway and does not involve a serine protease. The extent of cleavage is increased in the acidic parts of the secretory pathway. Cleavage generates a reactive group which could link the protein to a primary amide. |
| Function | Gel-forming glycoprotein of gastric and respiratory tract epithelia that protects the mucosa from infection and chemical damage by binding to inhaled microorganisms and particles that are subsequently removed by the mucociliary system. Interacts with H.pylori in the gastric epithelium, Barrett's esophagus as well as in gastric metaplasia of the duodenum (GMD). |
| Protein Name | Mucin-5acMuc-5acGastric MucinMajor Airway GlycoproteinMucin-5 Subtype Ac - TracheobronchialTracheobronchial MucinTbm |
| Database Links | Reactome: R-HSA-5083625Reactome: R-HSA-5083632Reactome: R-HSA-5083636Reactome: R-HSA-5621480Reactome: R-HSA-913709Reactome: R-HSA-977068 |
| Cellular Localisation | Secreted |
| Alternative Protein Names | Mucin-5ac proteinMuc-5ac proteinGastric Mucin proteinMajor Airway GlycoproteinMucin-5 Subtype Ac - Tracheobronchial proteinTracheobronchial Mucin proteinTbm proteinMUC5AC proteinMUC5 protein |
Information sourced from Uniprot.org
