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 and Western Blot.
Other applications not tested.
Recommended Dilution:ELISA: 1:1,000Western Blot: 1:100-1:500Optimal dilutions to be determined by the researcher.
Storage and Stability:Store product at 4°C if to be used immediately within two weeks.
For long-term storage, aliquot to avoid repeated freezing and thawing and store at -20°C.
Aliquots are stable at -20°C for 12 months after receipt.
Dilute required amount only prior to immediate use.
Further dilutions can be made in assay buffer.
For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
Note: Applications are based on unconjugated antibody.
仕様
Size：200ul
Host：rabbit
Source Antibody：human
Grade：Affinity Purified
Purity：Purified by immunoaffinity chromatography.
Form：Supplied as a liquid in PBS, pH 7.2. No preservative added. Labeled with Biotin.
Specificity：Recognizes human CALR. Species Crossreactivity: mouse.
Isotype：IgG
Calc Applications Abbrev：E WB
Calc Crossreactivity：Hu Mo
Immunogen：Synthetic peptide selected from the Center region of human CALR (KLH).
