Calreticulin Antibody [HRP]

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Product Details

Summary
Reactivity Hu, Mu, Rt, Bv, Ha, PmSpecies Glossary
Applications WB, Simple Western, DB, Flow, ICC/IF, IHC, IP, MA, MS, B/N, KD
Clonality
Polyclonal
Host
Rabbit
Conjugate
HRP

Order Details

Calreticulin Antibody [HRP] Summary

Immunogen
Calreticulin Antibody was developed against a fusion protein to mouse Calreticulin [Uniprot: P14211]
Localization
Calreticulin staining is localized to the ER in most cell types and under most conditions.
Marker
Endoplasmic Reticulum Marker
Isotype
IgG
Clonality
Polyclonal
Host
Rabbit
Gene
CALR
Purity
Immunogen affinity purified
Innovator's Reward
Test in a species/application not listed above to receive a full credit towards a future purchase.

Applications/Dilutions

Dilutions
  • Block/Neutralize
  • Dot Blot
  • Electron Microscopy
  • Flow Cytometry
  • Immunocytochemistry/ Immunofluorescence
  • Immunohistochemistry
  • Immunohistochemistry-Paraffin
  • Immunoprecipitation
  • Knockdown Validated
  • Protein Array
  • Simple Western
  • Western Blot
Application Notes
Optimal dilution of this antibody should be experimentally determined.

Reactivity Notes

Other species not tested.

Packaging, Storage & Formulations

Storage
Store at 4C in the dark.
Buffer
PBS
Preservative
No Preservative
Purity
Immunogen affinity purified

Alternate Names for Calreticulin Antibody [HRP]

  • Autoantigen Ro
  • CALR
  • Calregulin
  • Calreticulin
  • cC1qR
  • CRP55
  • CRT
  • Endoplasmic reticulum resident protein 60
  • epididymis secretory sperm binding protein Li 99n
  • ERp60
  • FLJ26680
  • grp60
  • HACBP
  • HEL-S-99n
  • RO
  • Sicca syndrome antigen A (autoantigen Ro; calreticulin)
  • SSA
  • Vasostatin

Background

Calreticulin, also called CALR, is an endoplasmic reticulum (ER) protein that functions as a calcium (Ca2+) buffering molecular chaperone (1-3). Together with calnexin and ERp57, calreticulin has a critical role in protein folding and quality control of newly synthesized glycoproteins (1-3). Calreticulin has many diverse functions beyond Ca2+ binding, including cell adhesion, lectin binding, apoptosis, nuclear transport, antigen presentation, and immune response (1-3). Specifically, calreticulin is part of the peptide-loading complex that resides on the ER membrane and is responsible for antigen loading onto MHC class I molecules (1-3). Calreticulin protein has a theoretical molecular weight of 46 kDa and is 417 amino acids (aa) in length (1-3). The protein has three main domains: the N-terminal lectin-like domain, the proline-rich P-domain, and the acidic C-domain which is followed by an ER-retention KDEL signal sequence (1-3).

Given its role in multiple biological processes, it makes sense that calreticulin is implicated in both healthy and disease states. Studies have found that calreticulin mutations were present in patients with myeloproliferative neoplasms (MFN) and essential thrombocythaemia (ET) (4). Calreticulin expression is typically upregulated in most cancer lines, however it is downregulated in some tissues including cervical carcinomas, prostate cancer, and human colon adenocarcinoma (3). High expression of calreticulin on cancer cells is related to tumor cell phagocytosis and is often correlated with, and counteracted by, elevated CD47 expression to prevent cancer cell phagocytosis (3). Calreticulin mutations can serve as a major diagnostic biomarker for MFN and ET and additionally the calreticulin gene may be a potential target for cancer therapeutics (3,4).

References

1. Michalak, M., Groenendyk, J., Szabo, E., Gold, L. I., & Opas, M. (2009). Calreticulin, a multi-process calcium-buffering chaperone of the endoplasmic reticulum. The Biochemical Journal. https://doi.org/10.1042/BJ20081847

2. Fucikova, J., Spisek, R., Kroemer, G., & Galluzzi, L. (2021). Calreticulin and cancer. Cell Research. https://doi.org/10.1038/s41422-020-0383-9

3. Sun, J., Mu, H., Dai, K., & Yi, L. (2017). Calreticulin: a potential anti-cancer therapeutic target. Die Pharmazie. https://doi.org/10.1691/ph.2017.7031

4. Prins, D., Gonzalez Arias, C., Klampfl, T., Grinfeld, J., & Green, A. R. (2020). Mutant Calreticulin in the Myeloproliferative Neoplasms. HemaSphere. https://doi.org/10.1097/HS9.0000000000000333

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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Product General Protocols

Video Protocols

WB Video Protocol
ICC/IF Video Protocol

FAQs for Calreticulin Antibody (NB600-101H) (0)

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Secondary Antibodies

 

Isotype Controls

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Blogs on Calreticulin.

Calreticulin - ER chaperone involved in calcium homeostasis and protein quality control
Calreticulin is a calcium-dependent ER chaperone, involved in protein folding, maturation, and cellular localization. Calreticulin is a highly conserved 48 kDa protein encoded by the CALR gene. Calreticulin and its homolog calnexin regulate the fo...  Read full blog post.

Calnexin - an ER chaperone that folds the cell's glycoproteins
Calnexin is an abundant 90kDa chaperone protein that resides in the membrane of the endoplasmic reticulum. Calnexin and the related calreticulin protein function together to ensure the proper folding of glycoproteins. By binding to partially folded...  Read full blog post.

Calreticulin: a Multiprocess Calcium Buffering Chaperone
Calreticulin is a Calcium binding chaperone that has multiple functions both inside and outside the endoplasmic reticulum. Calreticulin is involved in the quality control of newly synthesized proteins and glycoproteins, interacting with various other ...  Read full blog post.

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Bioinformatics

Gene Symbol CALR