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Furin Antibody (MM0298-4G31) [Allophycocyanin]

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Product Details

Summary
Reactivity HuSpecies Glossary
Applications WB, IHC
Clone
MM0298-4G31
Clonality
Monoclonal
Host
Mouse
Conjugate
Allophycocyanin

Order Details

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Furin Antibody (MM0298-4G31) [Allophycocyanin] Summary

Immunogen
Human recombinant Furin
Marker
TGN Marker
Isotype
IgG1
Clonality
Monoclonal
Host
Mouse
Gene
FURIN
Purity
Protein G purified
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Applications/Dilutions

Dilutions
  • Immunohistochemistry
  • Immunohistochemistry-Paraffin
  • Western Blot
Application Notes
Optimal dilution of this antibody should be experimentally determined.

Packaging, Storage & Formulations

Storage
Store at 4C in the dark.
Buffer
PBS
Preservative
0.05% Sodium Azide
Purity
Protein G purified

Alternate Names for Furin Antibody (MM0298-4G31) [Allophycocyanin]

  • Dibasic-processing enzyme
  • EC 3.4.21
  • EC 3.4.21.75
  • FUR
  • FURdibasic processing enzyme
  • furin (paired basic amino acid cleaving enzyme)
  • Furin
  • furin, membrane associated receptor protein
  • PACE
  • PACEFES upstream region
  • paired basic amino acid cleaving enzyme (furin, membrane associated receptorprotein)
  • Paired basic amino acid residue-cleaving enzyme
  • PCSK3
  • PCSK3furin
  • proprotein convertase subtilisin/kexin type 3
  • SPC1

Background

Furin (also known as FUR, PACE, PCSK3, and SCP1) is a ubiquity expressed, calcium-dependent serine protease that belongs to the subtilisin-like proprotein convertase (PC) family (1). Furin is synthesized as a 794-amino acid type-I transmembrane protein (1). Like other PC family members, furin shares structural similarity which includes a heterogeneous ~10 kDa amino terminal proregion, a ~55 kDa highly conserved subtilisin-like catalytic domain, and a carboxylterminal domain that is heterogeneous and varies in length and sequence between different PC family members (2). Furin plays an important role in embryogenesis and assists in the maturation of proprotein substrates (1,3). As a protease, furin cleaves and activates over 150 mammalian, viral, and bacterial substrates (3). These substrates include growth factors, receptors, hormones, cytokines, and adhesion molecules (1, 3). Furin processes these proproteins in secretory pathway compartments by cleaving at the carboxyl-terminus of the consensus sequence RX(K/R)R (where X is any amino acid) (1). Furin is localized to the trans-Golgi-network by the acidic peptide sequence C771PSDSEEDEG780 where phosphorylation of the serine residues regulates the intracellular trafficking. Another unique signaling domain is the hydrophobic motif Y759KGL762 that modulates endocytosis from the cell surface. The theoretical molecular weight of furin is 87 kDa; however, the observed molecular weight may vary as post-translational modifications, like glycosylation, cause the pre-pro furin to run at 110-104 kDa, the mature furin at 98-95 kDa, and the shed furin at 90 kDa (4).

Proteolytic cleavage regulates several physiological processes in both health and disease (3). Abnormal activity or mutations in proteases, including furin, is associated with pathologies and diseases including cancer, cardiovascular disorders, diabetes, inflammation, neurological diseases, and autoimmune diseases (3). As mentioned above, furin also acts upon bacterial substrates, including anthrax and Shiga toxin, and many virus families such as Herpes-, Flavi-, and Corona-, leading to host infections. Furthermore, the novel coronavirus disease 2019 (COVID-19) is caused by severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) present with a S-spike protein that is cleaved by PCs, including furin, at the S1/S2 cleavage site (5, 6). The cleavage allows the SARS-CoV-2 to then attach to the angiotensin-converting enzyme 2 (ACE2) receptor via the S1 domain and the cellular membrane via the S2 domain (5, 6). Although COVID-19 patients mostly present with respiratory symptoms, a variety of other systems are affected including cardiovascular, gastrointestinal (GI), and the liver (5-7). It is suggested that the S1/furin/ACE2 interaction promotes SARS-CoV-2 infection leading to the harmful symptoms and reactions in patients (5, 6). Cardiovascular disease is a common comorbidity in patients, along with hypertension, myocardial damage, and heart palpitations (Ming). Further evidence of furin being a risk factor for infection is the high levels of furin present in the blood of heart failure patients (5). Similarly, the small bowel may be another interaction site for infection as it is rich in furin and the intestinal enterocytes have many ACE2 receptors (6). Furin is also highly expressed in the liver and hepatocytes and cholangiocytes of the liver present ACE2 receptors (3, 7). Studies have shown that up one-third of COVID-19 patients experience GI symptoms which range from diarrhea and loss of appetite to abdominal cramping and bloody stool (6, 7). Additionally, some patients displayed abnormal liver enzyme levels (7). It has been suggested that a possible therapeutic strategy for treating those infected with SARS-CoV-2 is pharmacologically or immunologically modulating furin or ACE2 binding sites to combat COVID-19 infection (3, 5).

References

1. Thomas, G. (2002). Furin at the cutting edge: from protein traffic to emryogenesis and disease. Nature Rev. Mol. Cell Biol. https://doi.org/10.1038/nrm934

2. Zhou A., Paquet, L., & Mains, R.E. (1995). Structural elements that direct specific processing of different mammalian subtilisin-like prohormone convertases. J Biol Chem. https://doi.org/10.1074/jbc.270.37.21509

3. Braun E., & Sauter, D. (2019). Furin-mediated protein processing in infectious diseases and cancer. Clin Transl Immunology. https://doi:10.1002/cti2.1073

4. Atlas of Genetics and Cytogenetics in Oncology and Haematology, FURIN

5. Ming, Y. & Qiang, L. (2020). Involvement of Spike Protein, Furin, and ACE2 in SARS-CoV-2-Related Cardiovascular Complications. SN Compr. Clin. Med. https://doi.org/10.1007/s42399-020-00400-2

6. Monkemuller, K., Fry, L., & Rickes, S. (2020). COVID-19, coronavirus, SARS-CoV-2 and the small bowel. Rev Esp Enferm Dig. https://doi:10.17235/reed.2020.7137/2020

7. Agarwal, A., Chen, A., Ravindran, N., To, C., & Thuluvath, P.J. (2020). Gastrointestinal and Liver Manifestations of COVID-19. J Clin Exp Hepatol. https://doi:10.1016/j.jceh.2020.03.001

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

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Bioinformatics

Gene Symbol FURIN