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Active Mucin 5 Subtype B (MUC5B)

MUC5-B; MUC9; MG1; Oligomeric Mucus/Gel-Forming; Mucin 5,Subtype B,Tracheobronchial; Cervical mucin; High molecular weight salivary mucin MG1; Sublingual gland mucin

ACTIVITY TEST

Mucin 5 subtype B, also known as MUC5B, is a high molecular weight glycoprotein that belongs to the mucin family. It is primarily found in the mucus lining of the respiratory tract, where it plays a crucial role in protecting the epithelial cells from pathogens and environmental damage. It is also expressed in other tissues such as the gastrointestinal tract and the female reproductive system. The protein is secreted by goblet cells and submucosal glands and forms a viscoelastic gel that contributes to the lubrication and barrier function of mucus.Besides,Mucin 13, Cell Surface Associated (MUC13) has been identified as an interactor of MUC5B, thus a functional binding ELISA assay was conducted to detect the interaction of recombinant mouse MUC5B and recombinant human MUC13. Briefly, biotin-linked MUC5B were diluted serially in PBS, with 0.01% BSA (pH 7.4). Duplicate samples of 100μl were then transferred to MUC13-coated microtiter wells and incubated for 1h at 37℃. Wells were washed with PBST 3 times and incubation with Streptavidin-HRP for 30min, then wells were aspirated and washed 5 times. With the addition of substrate solution, wells were incubated 15-25 minutes at 37℃. Finally, add 50µl stop solution to the wells and read at 450nm immediately. The binding activity of MUC5B and MUC13 was shown in Figure 1, the EC50 for this effect is 3.58ug/mL.

USAGE

Reconstitute in 10mM PBS (pH7.4) to a concentration of 0.1-1.0 mg/mL. Do not vortex.

STORAGE

Avoid repeated freeze/thaw cycles. Store at 2-8°C for one month. Aliquot and store at -80°C for 12 months.

STABILITY

The thermal stability is described by the loss rate. The loss rate was determined by accelerated thermal degradation test, that is, incubate the protein at 37°C for 48h, and no obvious degradation and precipitation were observed. The loss rate is less than 5% within the expiration date under appropriate storage condition.

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Magazine Citations
The Journal of Biological Chemistry The Extracellular Signal-regulated Kinase Mitogen-activated Protein Kinase/Ribosomal S6 Protein Kinase 1 Cascade Phosphorylates cAMP Response Element-binding Protein to Induce MUC5B Gene Expression via D-Prostanoid Receptor Signaling Jcb: 34199
The Journal of Biological Chemistry The ERK MAPK/RSK1 cascade phosphorylates CREB to induce MUC5B gene expression via DP1 receptor signaling Jcb: 247684
Respiratory Researh Pyocyanin-induced mucin production is associated with redox modification of FOXA2 PubMed: PMC3765780
Respirology Secreted mucins and airway bacterial colonization in non-CF bronchiectasis PubMed: 26172851
American Thoracic Society International Conference Abstracts Mucin Secretion In Asthmatics With Osmotic Airway Hyperresponsiveness doi:10.1164
Ann Am Thorac Soc Airway Mucin 2 Is Decreased in Patients with Severe Chronic Obstructive Pulmonary Disease with Bacterial Colonization doi:10.1513
Секреторно-экссудативная реакция слизистой носа на воздействие холодного воздуха у больных бронхиальной астмой 10.20538/1682-0363-2017-2-146-158
Allergy Th2 cytokines orchestrate the secretion of MUC 5 AC and MUC 5B in IL‐5 positive chronic rhinosinusitis with nasal polyps Pubmed:29802623
European Journal of Pharmacology  Salvianolic acid B improves airway hyperresponsiveness by inhibiting MUC5AC overproduction associated with Erk1/2/P38 signaling Pubmed:29382534
Japan Society of Immunology & Allergology in Otolaryngology インフルエンザ菌Phosphorylcholine の表出と中耳ムチンMUC5AC 及びMUC5B 産生への影響 10.5648:jjiao.36.7
Journal of Investigative Medicine The characteristics and clinical significance of mucin levels in bronchoalveolar lavage fluid of patients with interstitial lung disease Pubmed: 30573494
Mucosal Immunology ASC and NLRP3 maintain innate immune homeostasis in the airway through an inflammasome-independent mechanism Pubmed: 31278375
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