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M2378

Sigma-Aldrich

Mucin from porcine stomach

Type II

Synonym(s):

MUC

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About This Item

CAS Number:
84082-64-4
EC Number:
282-010-7
MDL number:
MFCD00131629
UNSPSC Code:
12352202
NACRES:
NA.61
Pricing and availability is not currently available.

biological source

Porcine stomach

Quality Level

200

type

Type II

form

powder

composition

bound sialic acid, ≤1.2%

technique(s)

cell culture | mammalian: suitable

solubility

1 M NaOH: soluble 20 mg/mL

UniProt accession no.

A0A5G2QSD1

storage temp.

2-8°C

Gene Information

pig ... MUC2(100127145)

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General description

Mucin is majorly composed of carbohydrate units, crucial for structural architecture and conformation.[1] The monomer of mucin is 640 kDa, with protein contributing to only 20% of the molecular weight. The carbohydrate component is attached to the threonine and serine side chains.[2] Mucins are classified into secreted and transmembrane mucins.[3]
Mucins or mucus glycoproteins are the main macromolecular components of mammalian mucus.[4] It was also used in a study to evaluate the sputum smears concentrated by cyto-centrifugation for detection of acid-fast bacilli.[5]

Application

Mucin from porcine stomach has been used:
  • in the standard curve generation for quantifying mucin-2 generated during mucosal inflammation in mice[6]
  • as a component of digestion fluid solutions in in vitro human digestion model[7]
  • as a component of simulated saliva fluid[8]

Mucin from porcine stomach was used in studies on the binding site of the galactose-specific agglutinin PA-IL from Pseudomonas aeruginosa.[9]

Biochem/physiol Actions

Mucin has wide pharmacological applications in drug delivery.[1] Mucins play a protective role in inflammation. Deregulation in mucin synthesis contributes to tumorigenesis and chronic inflammation.[3]
Mucus forms the protective cover for all epithelial surfaces. The major structural component of mucus is gel-forming mucins. The mucus layer covering the intestinal epithelium has the MUC2 mucin as its central molecule. MUC2 is produced by goblet cells.[10]

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
0000347204
0000334812
0000329256
0000332290
0000329257

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Enhancement of the solubility, stability and bioaccessibility of quercetin using protein-based excipient emulsions
Chen X, et al.
Food Research International, 114, 30-37 (2018)
Mucins in cancer: function, prognosis and therapy
Kufe DW
Nature Reviews. Cancer, 9(12), 874-874 (2009)
An optimized purification process for porcine gastric mucin with preservation of its native functional properties
Schomig VJ, et al.
Royal Society of Chemistry Advances, 6(50), 44932-44943 (2016)
Structural investigation of porcine stomach mucin by X-ray fiber diffraction and homology modeling
Veluraja K, et al.
Biochemical and biophysical research communications, 406(4), 570-573 (2011)
Oral bioaccessibility of toxic and essential elements in raw and cooked commercial seafood species available in European markets
Alves RN, et al.
Food Chemistry, 267, 15-27 (2018)
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Questions

1–9 of 9 Questions  

  1. What is the best way to sterilise the product without destroying the structure?

    1 answer

    1. The structural integrity of this product has not been evaluated post-sterilization. A general procedure for sterilizing mucin has been published as follows:
      1. Place dry powdered mucin in a flask.
      2. Cover the mucin with 95% ethanol.
      3. Heat the covered mucin at 70 °C for 24 hours.
      4. Evaporate the alcohol to recover the mucin.
      This information is taken from Yeung, A.T.Y. et al., MBio, 3(3), e00073-12 (2012).

      In addition, this product is described as soluble in 1 M NaOH: soluble 20 mg/mL:
      https://www.sigmaaldrich.com/product/sigma/m2378

      This Millex syringe filter should be chemically compatible to filter sterilize that solution (this product is intended for a volume range ~ 10 – 100 ml solution):
      https://www.sigmaaldrich.com/product/mm/slgvr33rs

      See user guide:
      https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/documents/409/570/pr05510w-ms.pdf

      Helpful?

  2. How does this differ from human mucin?

    1 answer

    1. This product has not been tested in comparison to human-source mucin.
      It may be helpful to read through the following publication:
      https://www.nature.com/articles/s41598-020-77129-4

      Helpful?

  3. I saw that this product is made by peptide degradation. by that way, can it harvest transmembrane mucins? I wonder this product contains transmembrane mucin too, especially MUC1.

    1 answer

    1. This product is a very crude preparation of mucin obtained by digestion of hog stomach with pepsin, followed by precipitation of the mucin with alcohol. The crude mucin is collected by filtration and dried. It is a mixture of glycoproteins. Transmembrane mucins tend to be heavily glycosylated and are more resistant to digestion however, conditions such as pH, temperature, and activity of the enzyme may lead to degradation. Further characterization of the mucins present in the final product is not performed.

      Helpful?

  4. Is Product M2378, Mucin from porcine stomach, a purified preparation of mucin?

    1 answer

    1. No. This product is a crude preparation of mucin; it is a mixture of glycoproteins.  It is obtained by digestion of hog stomach with pepsin, followed by precipitation and other steps.

      Helpful?

  5. What is the Department of Transportation shipping information for this product?

    1 answer

    1. Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.

      Helpful?

  6. What is the molecular weight of Product M2378, Mucin from porcine stomach?

    1 answer

    1. This product is a crude mixture of glycoproteins. The sugar and amino acid composition of the mucin has not been determined.

      Helpful?

  7. What are the differences between Mucin from porcine stomach Products M2378 and M1778?

    1 answer

    1. Product No. M2378 is a crude mucin preparation. Product No. M1778 is a partially purified powder prepared according to the method described in Glenister, D.A. and Salmon. K. Microbial Ecol. in Health & Disease 1, 31, (1988). The amount of bound sialic acids are also different. Please refer to the specification sheets on our website.

      Helpful?

  8. What does the "Type" designation in Mucin from porcine stomach mean?

    1 answer

    1. The type designation does not have any particular biological significance.  It is used to emphasize differences in the listings of this product.

      Helpful?

  9. How can I solubilize Product M2378, Mucin from porcine stomach?

    1 answer

    1. This crude mucin may not be readily soluble in solution. At 20 mg/mL in 1 M sodium hydroxide, turbid suspensions are observed. To try to increase the solubility, one might try further dilution and sonication, but we have not tried this in our labs.

      Helpful?

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