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Also for CALR (NM_004343)
|Human calreticulin synthetic peptide with a cysteine residue added and the peptide conjugated to KLH|
|Human, Mouse, Rat, Bovine, dog, Chicken, Drosophila, Fish, Guinea porcine, Hamster, Monkey, porcine, Rabbit, Sheep
||WB 1:5000; IF
|Homo sapiens calreticulin (CALR)|
|cC1qR; CRT; HEL-S-99n; RO; SSA|
Entrez Gene 811 Human
Entrez Gene 12317 Mouse
Entrez Gene 64202 Rat
Entrez Gene 716910 Monkey
Entrez Gene 476694 Dog
|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. [provided by RefSeq]. |
|Secreted ProteinTranscription FactorsDruggable Genome Antigen processing and presentation|
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Western blot analysis of Calreticulin in various cell lysates, using a 1:1000 dilution of TA309300.
Calreticulin visualized using anti-CALR, tested on Bouin's fixed paraffin-embedded backskin sections of transgenic mice.