Calreticulin Antibody

Novus Biologicals, part of Bio-Techne | Catalog # NBP1-69107

Novus Biologicals, part of Bio-Techne
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NBP1-69107
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Key Product Details

Species Reactivity

Human

Applications

Western Blot

Label

Unconjugated

Antibody Source

Polyclonal Rabbit IgG

Concentration

0.5 mg/ml

View all Calreticulin Antibodies »

Product Specifications

Immunogen

Calreticulin Antibody was developed against synthetic peptides corresponding to CALR (calreticulin). The peptide sequence was selected form the middle region of CALR. Peptide sequence PDPSIYAYDNFGVLGLDLWQVKSGTIFDNFLITNDEAYAEEFGNETWGVT. The peptide sequence for this immunogen was taken from within the described region.

Marker

Endoplasmic Reticulum Marker

Clonality

Polyclonal

Host

Rabbit

Isotype

IgG

Description

The addition of 50% glycerol is optional for those storing this antibody at -20C and not aliquoting smaller units. However, please note that glycerol may interrupt some downstream antibody applications and should be added with caution.

Scientific Data Images for Calreticulin Antibody

Western Blot: Calreticulin Antibody [NBP1-69107]

Western Blot: Calreticulin Antibody [NBP1-69107]

Western Blot: Calreticulin Antibody [NBP1-69107] - HepG2 cell lysate, concentration 0.2-1 ug/ml.

Applications for Calreticulin Antibody

Application
Recommended Usage

Western Blot

1.0 ug/ml

Formulation, Preparation, and Storage

Purification

Affinity purified

Formulation

PBS, 2% Sucrose

Preservative

0.09% Sodium Azide

Concentration

0.5 mg/ml

Shipping

The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

Stability & Storage

Store at 4C short term. Aliquot and store at -20C long term. Avoid freeze-thaw cycles.

Background: Calreticulin

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

Alternate Names

Autoantigen Ro, CALR, Calregulin, cC1qR, CRT, SSA, Vasostatin

Gene Symbol

CALR

OMIM

NP_004334 (Human)

Additional Calreticulin Products

Product Documents for Calreticulin Antibody

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Certificate of Analysis

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Product Specific Notices for Calreticulin Antibody

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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