antibody

CALR (CALR, CRTC, Calreticulin, CRP55, Calregulin, Endoplasmic reticulum resident protein 60, HACBP, grp60)

033154

200 ul

polyclonal

domestic rabbit

nonconjugated

CALR (CALR, CRTC, Calreticulin, CRP55, Calregulin, Endoplasmic reticulum resident protein 60, HACBP, grp60)

rabbit

Pab

Antibodies

200 ul

IgG

Calreticulin is a multifunctional protein that acts as a major Ca(2+)-binding (storage) protein in the lumen of the endoplasmic reticulum. It is also found in the nucleus, suggesting that it may have a role in transcription regulation. Calreticulin binds to the synthetic peptide KLGFFKR, which is almost identical to an amino acid sequence in the DNA-binding domain of the superfamily of nuclear receptors. Calreticulin binds to antibodies in certain sera of systemic lupus and Sjogren patients which contain anti-Ro/SSA antibodies, it is highly conserved among species, and it is located in the endoplasmic and sarcoplasmic reticulum where it may bind calcium. The amino terminus of calreticulin interacts with the DNA-binding domain of the glucocorticoid receptor and prevents the receptor from binding to its specific glucocorticoid response element. Calreticulin can inhibit the binding of androgen receptor to its hormone-responsive DNA element and can inhibit androgen receptor and retinoic acid receptor transcriptional activities in vivo, as well as retinoic acid-induced neuronal differentiation. Thus, calreticulin can act as an important modulator of the regulation of gene transcription by nuclear hormone receptors. Systemic lupus erythematosus is associated with increased autoantibody titers against calreticulin but calreticulin is not a Ro/SS-A antigen. Earlier papers referred to calreticulin as an Ro/SS-A antigen but this was later disproven. Increased autoantibody titer against human calreticulin is found in infants with complete congenital heart block of both the IgG and IgM classes. Applications: Suitable for use in ELISA, Western Blot, Immunohistochemistry and Flow Cytometry. Other applications not tested. Recommended Dilutions: Western Blot: 1:1000 Immunohistochemistry (FFPE): 1:10-1:50 Flow Cytometry: 1:10-1:50 Optimal dilutions to be determined by the researcher. Storage and Stability: May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for 12 months after receipt. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.

Hu Rt

CALR, CRTC, Calreticulin, CRP55, Calregulin, Endoplasmic reticulum resident protein 60, HACBP, grp60

Recombinant protein corresponding to human CALR. Swiss/Uniprot Accession: P27797.

Recognizes human CALR. Species Crossreactivity: rat

Purified by Protein A and peptide affinity chromatography.

Supplied as a liquid in PBS, pH 7.2, 0.09% sodium azide.

As Reported

Product Type: Pab Isotype: IgG Host: rabbit Source: human Concentration: As Reported Form: Supplied as a liquid in PBS, pH 7.2, 0.09% sodium azide. Purity: Purified by Protein A and peptide affinity chromatography. Immunogen: Recombinant protein corresponding to human CALR. Swiss/Uniprot Accession: P27797. Specificity: Recognizes human CALR. Species Crossreactivity: rat Important Note: This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.

E FC IHC WB

-20°C

1. Du, X.L., et al. Oncogene 28(42):3714-3722(2009) 2. Sato, H., et al. Biochim. Biophys. Acta 1790(10):1198-1205(2009) 3. Abd Alla, J., et al. Biochem. Biophys. Res. Commun. 387(1):186-190(2009)

https://usbio-images.r.worldssl.net/prodimages/26/033154_1.png

Flow Cytometry analysis of HepG2 cells using 033154 (bottom histogram) compared to a negative control cell (top histogram). FITC-conjugated goat-anti-rabbit secondary antibodies were used for the analysis.