Rabbit Calreticulin Polyclonal Antibody | anti-CALR antibody

Calreticulin Antibody

Cat. Num. AAA8002002

• Gene Names: CALR; RO; CRT; SSA; cC1qR; HEL-S-99n
• Reactivity: Human, Mouse, Rat, Bovine, Dog, Chicken, Guinea Pig, Monkey, Pig, Hamster, Rabbit, Sheep
• Applications: Western Blot, Immunohistochemistry, Immunocytochemistry, Immunofluorescence, Immunoprecipitation, Flow Cytometry, Functional Assay
• Purity: Peptide Affinity Purified
• Synonyms: Calreticulin; Polyclonal Antibody; Calreticulin Antibody; Rabbit Anti-Human Calreticulin Polyclonal; CALR Antibody; Calregulin Antibody; cC1qR Antibody; CRP55 Antibody; ERp60 Antibody; HSCBP Antibody; RO Antibody; SSA Antibody; grp60 Antibody; anti-CALR antibody

• Host: Rabbit
• Reactivity: Human, Mouse, Rat, Bovine, Dog, Chicken, Guinea Pig, Monkey, Pig, Hamster, Rabbit, Sheep
• Clonality: Polyclonal
• Specificity: Detects ~63kDa.
• Purity/Purification: Peptide Affinity Purified
• Form/Format: PBS pH 7.4, 50% glycerol, 0.09% Sodium Azide
• Concentration: 1 mg/ml (varies by lot)
• Sequence Length: 417

• Applicable Applications for anti-CALR antibody: Western Blot (WB), Immunohistochemistry (IHC), Immunocytochemistry (ICC), Immunofluorescence (IF), Immunoprecipitation (IP), Flow Cytometry (FC/FACS)
• Application Notes: WB: 1:1000; IHC: 1:100; ICC/IF: 1:100
• Immunogen: Human calreticulin synthetic peptide with a cysteine residue added and the peptide conjugated to KLH
• Immunogen Species: Human
• Conjugate: Unconjugated
• Cellular Localization: Endoplasmic Reticulum, Endoplasmic Reticulum Lumen, Cytoplasm, Cell Surface, Extracellular Matrix, Sarcoplasmic Reticulum, Sarcoplasmic Reticulum Lumen
• Certificate of Analysis: A 1:1000 dilution was sufficient for detection of Calreticulin in 20 ug of HeLa cell lysate by ECL immunoblot analysis.
• Preparation and Storage: Store at-20 degree C.

Immunocytochemistry (ICC)

(Immunocytochemistry/Immunofluorescence analysis using Rabbit Anti-Calreticulin Polyclonal Antibody . Tissue: Heat Shocked Cervical cancer cell line (HeLa). Species: Human. Fixation: 2% Formaldehyde for 20 min at RT. Primary Antibody: Rabbit Anti-Calreticulin Polyclonal Antibody at 1:100 for 12 hours at 4 degree C. Secondary Antibody: FITC Goat Anti-Rabbit (green) at 1:200 for 2 hours at RT. Counterstain: DAPI (blue) nuclear stain at 1:40000 for 2 hours at RT. Localization: Endoplasmic reticulum lumen. Cytoplasm. Magnification: 100x. (A) DAPI (blue) nuclear stain. (B) Anti-Calreticulin Antibody. (C) Composite. Heat Shocked at 42 degree C for 1h.)

Western Blot (WB)

(Western blot analysis of multiple cell lines lysates showing detection of Calreticulin protein using Rabbit Anti-Calreticulin Polyclonal Antibody . Load: 15 ugprotein. Block: 1.5% BSA for 30 minutes at RT. Primary Antibody: Rabbit Anti-Calreticulin Polyclonal Antibody at 1:5000 for 2 hours at RT. Secondary Antibody: Donkey Anti-Rabbit IgG: HRP for 1 hour at RT.)

Immunohistochemistry (IHC)

(Immunohistochemistry analysis using Rabbit Anti-Calreticulin Polyclonal Antibody . Tissue: backskin. Species: Mouse. Fixation: Bouin's Fixative Solution. Primary Antibody: Rabbit Anti-Calreticulin Polyclonal Antibody at 1:100 for 1 hour at RT. Secondary Antibody: FITC Goat Anti-Rabbit (green) at 1:50 for 1 hour at RT. Localization: Cytoplasmic granule. Endoplasmic reticulum lumen.)

Immunocytochemistry (ICC)/Immunofluorescence (IF)

(Immunocytochemistry/Immunofluorescence analysis using Rabbit Anti-Calreticulin Polyclonal Antibody . Tissue: Heat Shocked Cervical cancer cell line (HeLa). Species: Human. Fixation: 2% Formaldehyde for 20 min at RT. Primary Antibody: Rabbit Anti-Calreticulin Polyclonal Antibody at 1:100 for 12 hours at 4 degree C. Secondary Antibody: R-PE Goat Anti-Rabbit (yellow) at 1:200 for 2 hours at RT. Counterstain: DAPI (blue) nuclear stain at 1:40000 for 2 hours at RT. Localization: Endoplasmic reticulum lumen. Cytoplasm. Magnification: 20x. (A) DAPI (blue) nuclear stain. (B) Anti-Calreticulin Antibody. (C) Composite. Heat Shocked at 42 degree C for 1h.)

Related Product Information for anti-CALR antibody

Calreticulin is a multifunctional, highly conserved Ca2+-binding protein that is localized to the endoplasmic reticulum (ER), but has also been detected in the nucleus and nuclear envelop. Like many other ER proteins, it has the conserved ER retention KDEL (Lys-Asp-Glu-Leu) sequence at its C-terminus (1-3). CRT's three domains include a 180 residue N-terminal domain, a proline-rich P-domain (residues 189-288) that binds Ca2+ with high affinity and shares homology with calnexin (CNX) and calmegin, and a 110 residue C-terminal domain that binds Ca2+ with low affinity but high capacity (1,3). Recent studies suggest that this soluble ER protein has a multifunctional role. It appears to be involved in calcium storage and regulation as well as having a molecular chaperone activity. It has been shown to interact with the cytoskeleton and to be involved in the regulation of gene expression. Calreticulin may also play a role in cellular proliferation including its apparent activity in the proliferation of certain viruses within mammalian host cells (4, 5), and it has also been shown to be induced in response to various types of cell stress including amino acid deprivation (6). Close interconnections among protein synthesis, gene expression and calcium signaling have been observed by many researchers in recent years. Calreticulin might be centrally located and therefore it crucially participates in the coordination of many functions by the cell (4, 5). Studies also suggest its involvement in a few diseases such as systemic lupus erythematosus, rheumatoid arthritis, celiac disease, complete congenital heart block, and halothane hepatitis (1).

Product Categories/Family for anti-CALR antibody

Cell Signaling; Protein Trafficking; Organelle Proteins| Tags and Cell Markers; Organelle Markers

References

1. Johnson S., et al. (2001) Trends Cell Biol 11: 122-129. 2. Smith M.J., et al. (1989) EMBO J. 8: 3581-3586. 3. Ellgaard L., et al. (2001) Curr Opin Cell Biol. 13: 431-437. 4. Krause K.H., and Michalak M. (1997) Cell. 88: 439-443. 5. Nash P.D., et al. (1994) Mol Cell Biochem. 135: 71-78. 6. Heal R., and McGivan J. (1998) Biochem J. 329: 389-394. 7. Lucero H.A., et al. (1998) J Biol Chem. 273: 9857-9863. 8. Tanaka S., et al. (2000) J Biol Chem. 275: 10388-10393. 9. Yoon G.S., et al. (2000) Cancer Res. 60: 1117-1120. 10. Antoniou A.N., et al. (2002) Immunology 106: 182-189. 11. Wada I., et al. (1997) EMBO J. 16: 5420-5432. 12. Laguerre D.B., et al. (1998) J Vir. 72: 4940-4949.

NCBI and Uniprot Product Information

• NCBI GI #: 4757900
• NCBI GeneID: 811
• NCBI Accession #: NP_004334.1
• NCBI GenBank Nucleotide #: NM_004343.3
• UniProt Accession #: P27797
• NCBI Official Full Name: calreticulin
• NCBI Official Synonym Full Names: calreticulin
• NCBI Official Symbol: CALR
• NCBI Official Synonym Symbols: RO; CRT; SSA; cC1qR; HEL-S-99n
• NCBI Protein Information: calreticulin
• UniProt Protein Name: Calreticulin
• Protein Family: Calreticulin
• UniProt Gene Name: CALR
• UniProt Synonym Gene Names: CRTC; ERp60
• UniProt Entry Name: CALR_HUMAN

NCBI Description

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]

Uniprot Description

Calreticulin: Calcium-binding chaperone that promotes folding, oligomeric assembly and quality control in the endoplasmic reticulum (ER) via the calreticulin/calnexin cycle. This lectin interacts transiently with almost all of the monoglucosylated glycoproteins that are synthesized in the ER. Interacts with the DNA-binding domain of NR3C1 and mediates its nuclear export. Involved in maternal gene expression regulation. May participate in oocyte maturation via the regulation of calcium homeostasis. Monomer. Component of an EIF2 complex at least composed of CELF1/CUGBP1, CALR, CALR3, EIF2S1, EIF2S2, HSP90B1 and HSPA5. Interacts with PDIA3/ERp57. Interacts with NR3C1 and TRIM21. Interacts with GABARAP. Belongs to the calreticulin family.

Protein type: Secreted, signal peptide; Secreted; Nuclear receptor co-regulator; Calcium-binding; Motility/polarity/chemotaxis

Chromosomal Location of Human Ortholog: 19p13.3-p13.2

Cellular Component: Golgi apparatus; extracellular space; smooth endoplasmic reticulum; sarcoplasmic reticulum lumen; cell surface; focal adhesion; endoplasmic reticulum lumen; endoplasmic reticulum; extracellular region; acrosome; cytosol; polysome; proteinaceous extracellular matrix; membrane; perinuclear region of cytoplasm; cytoplasm; intracellular; nucleus; external side of plasma membrane

Molecular Function: hormone binding; zinc ion binding; complement component C1q binding; unfolded protein binding; calcium ion binding; peptide binding; mRNA binding; integrin binding; protein binding; androgen receptor binding; DNA binding; ubiquitin protein ligase binding; iron ion binding; chaperone binding; glycoprotein binding; carbohydrate binding

Biological Process: protein maturation via protein folding; protein folding; regulation of meiosis; negative regulation of transcription from RNA polymerase II promoter; cardiac muscle cell differentiation; response to estradiol stimulus; regulation of apoptosis; antigen processing and presentation of peptide antigen via MHC class I; regulation of transcription, DNA-dependent; positive regulation of phagocytosis; positive regulation of cell proliferation; antigen processing and presentation of exogenous peptide antigen via MHC class I; protein export from nucleus; cortical actin cytoskeleton organization and biogenesis; cell cycle arrest; response to drug; receptor-mediated endocytosis; negative regulation of steroid hormone receptor signaling pathway; protein stabilization; unfolded protein response; antigen processing and presentation of exogenous peptide antigen via MHC class I, TAP-dependent; positive regulation of cell cycle; response to testosterone stimulus; post-translational protein modification; peptide antigen assembly with MHC class I protein complex; cellular calcium ion homeostasis; negative regulation of retinoic acid receptor signaling pathway; negative regulation of neuron differentiation; unfolded protein response, activation of signaling protein activity; cellular protein metabolic process; sequestering of calcium ion; negative regulation of translation; glucocorticoid receptor signaling pathway; protein amino acid N-linked glycosylation via asparagine; spermatogenesis; negative regulation of transcription, DNA-dependent; positive regulation of DNA replication

Disease: Myelofibrosis; Thrombocythemia 1