Calreticulin (CALR) Mouse Monoclonal Antibody [Clone ID: OTI13E4]

Specifications

Product Data
Clone Name	OTI13E4
Applications	WB
Recommend Dilution	WB 1:500
Reactivity	Human, Mouse, Rat
Host	Mouse
Clonality	Monoclonal
Immunogen	Full length human recombinant protein of human CALR (NP_004334) produced in HEK293T cell.
Formulation	Lyophilized powder (original buffer 1X PBS, pH 7.3, 8% trehalose)
Reconstitution Method	For reconstitution, we recommend adding 100uL distilled water to a final antibody concentration of about 1 mg/mL. To use this carrier-free antibody for conjugation experiment, we strongly recommend performing another round of desalting process. (OriGene recommends Zeba Spin Desalting Columns, 7KMWCO from Thermo Scientific)
Purification	Purified from mouse ascites fluids or tissue culture supernatant by affinity chromatography (protein A/G)
Conjugation	Unconjugated
Storage Condition	Store at -20°C as received.
Predicted Protein Size	48.14 kDa
Gene Name	calreticulin
Database Link	NP_004334 Entrez Gene 12317 MouseEntrez Gene 64202 RatEntrez Gene 811 Human UniProt ID P27797
Background	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, Jul 2008]
Synonyms	cC1qR; CRT; HEL-S-99n; RO; SSA
Reference Data
Protein Families	Druggable Genome, Secreted Protein, Transcription Factors
Protein Pathways	Antigen processing and presentation

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