Summary: 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].
These shRNA constructs were designed against multiple splice variants at this gene locus. To be certain that your variant of interest is targeted, align it with our published shRNA design sequences. If these do not align, please utilize our custom shRNA service.
OriGene guarantees that the sequences in the shRNA expression cassettes are verified to correspond to the target gene with 100% identity. One of the four constructs at minimum are guaranteed to produce 70% or more gene expression knock-down provided a minimum transfection efficiency of 80% is achieved. Western Blot data is recommended over qPCR to evaluate the silencing effect of the shRNA constructs 72 hrs post transfection. To properly assess knockdown, the gene expression level from the included scramble control vector must be used in comparison with the target-specific shRNA transfected samples.
For non-conforming shRNA, requests for replacement product must be made within ninety (90) days from the date of delivery of the shRNA kit. To arrange for a free replacement with newly designed constructs, please contact Technical Services at firstname.lastname@example.org. Please provide your data indicating the transfection efficiency and measurement of gene expression knockdown compared to the scrambled shRNA control (Western Blot data preferred).
* Delivery time in business days.Occasional delay may occur due to complexity of the constructs.
All shRNA Citations:
Silencing SATB1 influences cell invasion, migration, proliferation, and drug resistance in nasopharyngeal carcinoma, Ye, CS;Zhou, DN;Yang, QQ;Deng, YF;,
Int J Clin Exp Pathol Apr 2014
[SATB1] ZEB1 sensitizes lung adenocarcinoma to metastasis suppression by PI3K antagonism, Yang, Y;Ahn, YH;Chen, Y;Tan, X;Guo, L;Gibbons, DL;Ungewiss, C;Peng, DH;Liu, X;Lin, SH;Thilaganathan, N;Wistuba, II;Rodriguez-Canales, J;McLendon, G;Creighton, CJ;Kurie, JM;,
J. Clin. Invest. April 2014
[FOG2] HSCARG, a novel regulator of H2A ubiquitination by downregulating PRC1 ubiquitin E3 ligase activity, is essential for cell proliferation, Hu, B;Li, S;Zhang, X;Zheng, X;,
Nucleic Acids Res. April 2014
[USP7] The transcription factor GLI1 interacts with SMAD proteins to modulate TGFß-induced gene expression in a PCAF-dependent manner, Nye, MD;Almada, LL;Fernandez-Barrena, MG;Marks, DL;Elsawa, SF;Vrabel, A;Tolosa, EJ;Ellenrieder, V;Fernandez-Zapico, ME;,
J. Biol. Chem. April 2014
[SMAD4] The transcription factor GLI1 interacts with SMAD proteins to modulate TGFß-induced gene expression in a PCAF-dependent manner, Nye, MD;Almada, LL;Fernandez-Barrena, MG;Marks, DL;Elsawa, SF;Vrabel, A;Tolosa, EJ;Ellenrieder, V;Fernandez-Zapico, ME;,
J. Biol. Chem. April 2014
[SMAD2] Culture dimensionality influences the resistance of glioblastoma stem-like cells to multikinase inhibitors, Fernandez-Fuente, G;Mollinedo, P;Grande, L;Vazquez-Barquero, A;Fernandez-Luna, JL;,
Mol. Cancer Ther. April 2014
[PDGFRA] HSV-2 Increases TLR4-Dependent Phosphorylated IRFs and IFN-ß Induction in Cervical Epithelial Cells, Liu, H;Chen, K;Feng, W;Guo, J;Li, H;,
PLoS ONE e94806 9 4. April 2014
[TLR4] Chymase Mediates Injury and Mitochondrial Damage in Cardiomyocytes during Acute Ischemia/Reperfusion in the Dog, Zheng, J;Wei, CC;Hase, N;Shi, K;Killingsworth, CR;Litovsky, SH;Powell, PC;Kobayashi, T;Ferrario, CM;Rab, A;Aban, I;Collawn, JF;Dell'italia, LJ;,
PLoS ONE e94732 9 4. April 2014
[NR4A1] Primary cilium regulates CaV1.2 expression through Wnt signaling, Muntean, BS;Jin, X;Williams, FE;Nauli, SM;,
J. Cell. Physiol. April 2014
[CACNA1C] A DERL3-associated defect in the degradation of SLC2A1 mediates the Warburg effect, Lopez-Serra, P;Marcilla, M;Villanueva, A;Ramos-Fernandez, A;Palau, A;Leal, L;Wahi, JE;Setien-Baranda, F;Szczesna, K;Moutinho, C;Martinez-Cardus, A;Heyn, H;Sandoval, J;Puertas, S;Vidal, A;Sanjuan, X;Martinez-Balibrea, E;Viñals, F;Perales, JC;Bramsem, JB;Ørntoft, TF;Andersen, CL;Tabernero, J;McDermott, U;Boxer, MB;Heiden, MG;Albar, JP;Esteller, M;,
Nat Commun 3608 5 . April 2014
* Delivery time is an estimate in business days. Occasional delays may occur due to unforeseen complexities in the preparation of your construct. International customers may expect an additional 1-2 weeks in shipping