Recombinant Human CIRBP Protein (His Tag)

Beta LifeScience SKU/CAT #: BLPSN-1272

Recombinant Human CIRBP Protein (His Tag)

Beta LifeScience SKU/CAT #: BLPSN-1272
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Product Overview

Tag His
Host Species Human
Accession Q14011
Synonym CIRP
Background CIRBP, also known as cold-inducible RNA-binding protein, plays a protective role in the genotoxic stress response by stabilizing transcripts of genes involved in cell survival. CIRBP responds to a wide array of cellular stresses, including short wavelength ultraviolet light (UVC), at the transcriptional and post-translational level. It acts as a translational activator.CIRBP can bind the 3 translated region of specific transcripts to stabilize them and facilitate their transport to ribosomes for translation. CIRBP affects NF-κB signaling as opposed to IL1B mRNA stability directly.
Description A DNA sequence encoding the human CIRBP (Q14011) (Met1-Glu172) was expressed with a His tag at the N-terminus.
Source E.coli
Predicted N Terminal His
AA Sequence Met1-Glu172
Molecular Weight The recombinant human CIRBP consists of 187 a.a. and predicts a molecular mass of 20.5 KDa. It migrates as an approximately 23 KDa band in SDS-PAGE under reducing conditions.
Purity >90% as determined by SDS-PAGE
Endotoxin Please contact us for more information.
Bioactivity Please contact us for detailed information
Formulation Lyophilized from sterile 20mM Tris, 500mM NaCl, 0.25M Imi, 20% glycerol..
Stability The recombinant proteins are stable for up to 1 year from date of receipt at -70°C.
Usage For Research Use Only
Storage Store the protein under sterile conditions at -20°C to -80°C. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.

Target Details

Target Function Cold-inducible mRNA binding protein that plays a protective role in the genotoxic stress response by stabilizing transcripts of genes involved in cell survival. Acts as a translational activator. Seems to play an essential role in cold-induced suppression of cell proliferation. Binds specifically to the 3'-untranslated regions (3'-UTRs) of stress-responsive transcripts RPA2 and TXN. Acts as a translational repressor. Promotes assembly of stress granules (SGs), when overexpressed.
Subcellular Location Nucleus, nucleoplasm. Cytoplasm.
Database References
Tissue Specificity Ubiquitous.

Gene Functions References

  1. The serum and synovial concentrations of CIRP in the rheumatoid arthritis patients were increased, suggesting that CIRP mediates inflammation and is a potential marker for synovial inflammation. PMID: 27315340
  2. This study reports that cold-inducible RNA-binding protein (CIRBP) is a newly identified key regulator in DNA double-strand break (DSB) repair. PMID: 29432179
  3. Crystal structure of the hnRNP A18 RNA recognition motif has been reported. PMID: 28368279
  4. cold temperature can induce an airway inflammatory response and excess mucus production via a CIRP-mediated increase in mRNA stability and protein translation PMID: 27477308
  5. CIRP Expression Is Induced in Skin Cancer Cells and in Keratinocytes Exposed to Lower-Dose But Not Higher-Dose UVB Radiation. PMID: 27864909
  6. In human abdominal aortic aneurysm (AAA) tissue, Cold-inducible RNA-binding protein (CIRP) exhibited a 5.6-fold and 93% increase in mRNA and protein expression, respectively. In a rat AAA model, CIRP was upregulated significantly in a time-dependent manner in the serum and AAA tissue. PMID: 26936526
  7. We found out that the link between CIRP and Snail is mediated by ERK and p38 pathways. EMT is a critical component of carcinoma metastasis and invasion. As demonstrated in this study, the biological role of CIRP in EMT may explain why CIRP overexpression has been associated with a bad prognosis in cancer patients. PMID: 27395339
  8. CIRP was expressed in the bronchi of human COPD patients and was involved in inflammatory factors and MUC5AC expression after cold stimulation through the ERK and NF-kappaB pathways PMID: 27184164
  9. Low CIRP expression is associated with colon Cancer. PMID: 28373441
  10. this study shows that CIRP expression in bronchial airway epithelial cells of patients with chronic obstructive pulmonary disease is higher than that in healthy person PMID: 27423012
  11. We generated a transgenic mouse model overexpressing human CIRP in the mammary epithelium to ask if it plays a role in mammary gland development. Effects of CIRP overexpression on mammary gland morphology, cell proliferation, and apoptosis were studied from puberty through pregnancy, lactation and weaning PMID: 27837912
  12. Increased synovial fluid CIRP concentrations were closely associated with the severity of knee osteoarthritis PMID: 27840101
  13. hnRNP A18 can promote tumor growth in in vivo models by coordinating the translation of pro-survival transcripts to support the demands of proliferating cells and increase survival under cellular stress. PMID: 26824423
  14. Clinically, CIRP overexpression is significantly correlated with Cushing's disease recurrence. CIRP appears to play a critical tumorigenesis function in Cushing's disease and its expression might be a useful biomarker for tumor recurrence. PMID: 26824322
  15. CIRP protein regulates telomerase activity in a temperature-dependent manner by regulating the level of TERT mRNAs. PMID: 26673712
  16. Study shows that CIRP elevated plasma concentration is significantly associated with poor prognosis among patients with sepsis. Therefore, CIRP is a potential predictor of sepsis prognosis. PMID: 26361390
  17. The expression of CIRP in pituitary adenoma is closely related with tumor proliferation and invasion, and its significantly elevated expression level indicates post-op recurrence. PMID: 25934796
  18. CIRP inhibits DNA damage-induced apoptosis by regulating p53 protein.CIRP suppresses p53 upregulation during apoptosis.CIRP regulates the expression of genes involved in apoptosis. PMID: 26188505
  19. High levels of CIRP protein expression was associated with a short survival rate in oral squamous cell carcinoma patients. PMID: 25027624
  20. Cirp promotes the development of intestinal inflammation and colorectal tumors through regulating apoptosis and production of TNFalpha and IL23 in inflammatory cells. PMID: 25187386
  21. report increased levels of cold-inducible RNA-binding protein (CIRP) in the blood of individuals admitted to the surgical intensive care unit with hemorrhagic shock PMID: 24097189
  22. CIRBP regulates the expression of interleukin-1beta in an NF-kappaB-dependent fashion. PMID: 23437386
  23. CIRBP contributes to ultraviolet light- and lipopolysaccharide-induced expression of IL1beta by regulating NFkappaB activity. PMID: 23437386
  24. results suggest that cold inducible RNA binding protein may participate in the cell cycle regulation of normal endometrium and the loss of its expression may be involved in endometrial carcinogenesis PMID: 12819390
  25. RBM3 and CIRP are adaptatively expressed in response to hypoxia by a mechanism that involves neither HIF-1 nor mitochondria PMID: 15075239
  26. CIRP enhanced extracellular signal-regulated kinase 1 and 2 (ERK1/2) phosphorylation, and treatment with an MEK inhibitor decreased the proliferation caused by CIRP. PMID: 19158277
  27. pharmacological modulation of RBM3 and CIRBP may represent novel therapeutic approaches for prostate cancer. PMID: 19277990


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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

To learn more about how to properly dissolve the lyophilized recombinant protein, please visit Lyophilization FAQs.

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