Biotinylated Human CEACAM5 Protein (C-6His-Avi)

Beta LifeScience SKU/CAT #: BL-2411NP
BL-2411NP: Greater than 95% as determined by reducing SDS-PAGE. (QC verified)
BL-2411NP: Greater than 95% as determined by reducing SDS-PAGE. (QC verified)

Biotinylated Human CEACAM5 Protein (C-6His-Avi)

Beta LifeScience SKU/CAT #: BL-2411NP
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Product Overview

Description Biotinylated Recombinant Human Carcinoembryonic Antigen-Related Cell Adhesion Molecule 5 is produced by our Mammalian expression system and the target gene encoding Lys35-Ala685 is expressed with a Avi, 6His tag at the C-terminus.
Accession P06731
Synonym Carcinoembryonic antigen-related cell adhesion molecule 5; Carcinoembryonic antigen; CEA; Meconium antigen 100; CD66e; CEACAM5
Gene Background Carcinoembryonic antigen-related cell adhesion molecules (CEACAMs) belong to a group of mammalian immunoglobulin related glycoproteins. They play critical roles in cell–cell recognition. CEACAM5, also called CEA and CD66e, is characterized by having seven extracellular Ig domains and a glycosylphosphatidylinositol (GPI) anchor. CEACAM5 is expressed primarily by epithelial cells, and functions as a calcium-independent adhesion molecule through homophilic and heterophilic interactions with CEACAM1. Studies have shown that CEACAM5 is overexpressed in a majority of carcinomas, and its overexpression can protect tumor cells from apoptosis. It is commonly used as a cancer marker.
Molecular Mass 74.2 KDa
Apmol Mass 110-150 KDa, reducing conditions
Formulation Lyophilized from a 0.2 μm filtered solution of PBS, pH 7.4.
Endotoxin Less than 0.1 ng/µg (1 EU/µg) as determined by LAL test.
Purity Greater than 95% as determined by reducing SDS-PAGE. (QC verified)
Biological Activity Not tested
Reconstitution Always centrifuge tubes before opening. Do not mix by vortex or pipetting. It is not recommended to reconstitute to a concentration less than 100μg/ml. Dissolve the lyophilized protein in distilled water. Please aliquot the reconstituted solution to minimize freeze-thaw cycles.
Storage Lyophilized protein should be stored at ≤ -20°C, stable for one year after receipt. Reconstituted protein solution can be stored at 2-8°C for 2-7 days. Aliquots of reconstituted samples are stable at ≤ -20°C for 3 months.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature listed below.
Usage For Research Use Only

Target Details

Target Function Cell surface glycoprotein that plays a role in cell adhesion, intracellular signaling and tumor progression. Mediates homophilic and heterophilic cell adhesion with other carcinoembryonic antigen-related cell adhesion molecules, such as CEACAM6. Plays a role as an oncogene by promoting tumor progression; induces resistance to anoikis of colorectal carcinoma cells.; (Microbial infection) Receptor for E.coli Dr adhesins. Binding of E.coli Dr adhesins leads to dissociation of the homodimer.
Subcellular Location Cell membrane; Lipid-anchor, GPI-anchor. Apical cell membrane. Cell surface.
Protein Families Immunoglobulin superfamily, CEA family
Database References
Tissue Specificity Expressed in columnar epithelial and goblet cells of the colon (at protein level). Found in adenocarcinomas of endodermally derived digestive system epithelium and fetal colon.

Gene Functions References

  1. Positive CEA mRNA in low rectal cancer is a factor that predisposes patients to a high risk for overall recurrence, especially for local recurrence. PMID: 28291565
  2. High carcinoembryonic antigen elevation is associated with recurrence in rectal cancer. PMID: 29774483
  3. CEA and CA19-9 are cancer antigens that are late markers of carcinogenesis, with significantly elevated serum concentrations in case of colon cancer with already developed metastases. Older age group of patient has significantly elevated levels of both antigens. Cancer was twice more common in men than in women. PMID: 25568506
  4. High CEA expression is associated with breast cancer metastasis. PMID: 29433529
  5. Pretreatment serum CEA levels over 30.02 ng/mL on behalf of worse characteristics and unfavourable tumor behavior, and a poor prognosis for a nearly doubled risk of mortality in gastric cancer patients. PMID: 29358864
  6. Elevation of CEA level was an independent risk factor for the poor prognosis of early gastric cancer. PMID: 29121872
  7. The elevation of serum CEA level was independent from the other tumor markers in hypohidrotic condition represented by acquired idiopathic generalized anhidrosis. PMID: 28295553
  8. Elevated CEA levels during targeted therapy may be a more sensitive predictor of explosive lung adenocarcinoma progression in patients harboring mutant EGFRs compared to traditional imaging methods. PMID: 28705152
  9. Increased CEA expression is associated with colorectal cancer. PMID: 28128739
  10. The detection of TK1 combined with that of cytokeratin-19 fragment (CYFRA21-1), CEA or NSE increased the diagnostic value of TK1 for lung squamous cell carcinoma, adenocarcinoma and small cell lung cancer, respectively. PMID: 29247745
  11. In patients with non-small-cell lung cancer treated with nivolumab, worse pretreatment performance status, and higher carcinoembryonic antigen were associated with inferior progression-free survival. PMID: 29277824
  12. To examine the relation of carcinoembryonic antigen (CEA) response with tumor response and survival in patients with (K)RAS wild-type metastatic colorectal cancer receiving first-line chemotherapy in the FIRE-3 trial comparing FOLFIRI plus cetuximab versus FOLFIRI plus bevacizumab PMID: 27234640
  13. This is the first population-based investigation of a large cohort of exclusively stage I rectal cancer patients providing compelling evidence that elevated preoperative CEA level is a strong predictor of worse overall and cancer-specific survival. PMID: 27067235
  14. Elevated levels of systemic IFNgamma and IL-6 implied that the CEACAM5-specific T cells had undergone immune activation in vivo but only in patients receiving high-intensity pre-conditioning. PMID: 28660319
  15. Combination of the two tumor markers, CEA and CYFRA21-1, is a predictive and prognostic marker of docetaxel monotherapy for previously treated NSCLC patients PMID: 28870944
  16. Patients with CEA-High stage I NSCLC have a higher risk of regional or systemic relapse and should be followed-up carefully. PMID: 28870949
  17. Postoperative CEA level >2.5 ng/ml is a predictor of distant metastasis and a negative prognostic factor for survival in rectal cancer patients who receive preoperative chemoradiotherapy and curative surgery. PMID: 27553616
  18. Data show that triple-negative breast cancer (TNBC) patients with pre-therapeutic serum high levels of both carcinoembryonic antigen (CEA) and cancer antigen 15-3 (CA15-3) had shorter overall survival (OS) and disease-free survival (DFS) rates than those in the low-level groups. PMID: 27561099
  19. Serum CEA level is not influenced by the presence of benign dominant biliary stricture or superimposed bacterial cholangitis in patients with primary sclerosing cholangitis. PMID: 27943017
  20. Preoperative-CEA was elevated (>/=5.0 ng/mL) in 73.6% of the colorectal cancer patients and remained elevated after surgery in 32.7% of the patients. Elevated postoperative-CA 19-9 (>/=50 U/mL) was observed in 9.5% of the patients. Neither elevated pre-CEA nor elevated pre-CA 19-9 was associated with relapse-free survival (RFS) but both elevated post-CEA and elevated post-CA 19-9 were associated with reduced RFS. PMID: 27664887
  21. the diagnostic sensitivity and specificity of serum reactive oxygen species modulator 1 were only 41.38% and 86.21%, respectively, with the cutoff value of 27.22 ng/mL. The sensitivity and specificity of pleural fluid carcinoembryonic antigen were 69.23% and 88.00%, respectively, at the cutoff value of 3.05 ng/mL, while serum carcinoembryonic antigen were 80.77% and 72.00% at the cutoff value of 2.60 ng/mL. PMID: 28459208
  22. Taken together, the results of our study identified CEACAM5 as a novel cell surface binding target of Middle East respiratory syndrome coronavirus that facilitates infection by augmenting the attachment of the virus to the host cell surface. PMID: 27489282
  23. Data show that carcinoembryonic antigen (CEA) modestly differentiated between mucinous and nonmucinous lesions, and amylase did not distinguish intraductal papillary mucinous neoplasms (IPMNs) from mucinous cystadenomas (MCAs). PMID: 26646270
  24. In this study, we detected the tumor marker carcinoembryonic antigen (CEA) using the QD-LFTS system, which allowed quantitative analysis in the range of 1-100ng/mL with an ideal detection limit of 0.049ng/mL. Thus, the system is suitable for detecting CEA in the clinically accepted range. We also detected 70 positive and 30 negative serum samples using the Handing system, which exhibited good specificity and sensitivity. PMID: 27825889
  25. As a proof-of-concept study, the constructed platform exhibits good specificity for CEA and the detection limit reaches as low as 8pg/mL (45 fM) with a wide linear range from 0.01 to 60ng/mL in the both cases PMID: 27886601
  26. Under the optimal conditions, the proposed immunosensor was used for the detection of CEA with wide dynamic range in the range from 5 fg/mL to 50ng/mL with a low detection limit of 2fg/mL (S/N=3). PMID: 27871047
  27. Relative CL intensity of all-in-one dual-aptasensor, operated with the competitive reaction of CEA and hemin in the presence of the dual aptamer, was exponentially decreased with the increase of CEA concentration in human serum PMID: 27875751
  28. Data indicate that serum tumor markers showed significant shorter 3-year progression-free survival (PFS) in higher levels compared to lower levels for S-CYFRA 21-1 (cytokeratin 19 fragment), S-SCCA and S-CEA. PMID: 26432331
  29. Multivariate logistic regression analysis revealed TC and DeltaCEA as independent factors in predicting TRG; TC showed a sensitivity of 62.79 %, a specificity of 91.49 %, a Youden index of 0.543, a cutoff value of 5.52, and an AUC of 0.800 compared with DeltaCEA (sensitivity 76.74 %, specificity 65.96 %, Youden index 0.427, and AUC 0.761). PMID: 26531721
  30. Data suggest that joint detection of receptor-binding cancer antigen expressed on SiSo cells (RCAS1) and carcinoembryonic antigen (CEA) can improve the diagnostic sensitivity and specificity. PMID: 26438059
  31. High CEA level is associated with Oral Squamous Cell Carcinoma. PMID: 27165212
  32. High CEA expression is associated with metastasis and recurrence in endometrial cancer. PMID: 26779635
  33. ZKSCAN3 appears to promote colorectal tumor progression and invasion. ZKSCAN3 may facilitate hepatic metastasis of CRC associated with CEA particularly in cases with CEA-producing tumor PMID: 27127149
  34. we evaluated the clinical performance of LOCItrade mark-based tumor marker assays CEA, CA19-9, CA15-3, CA125 and AFP in patients with gastrointestinal cancer and demonstrated their high diagnostic power PMID: 28011514
  35. High carcinoembryonic Antigen expression is associated with gastric cancer. PMID: 25124614
  36. High CEA expression is associated with Squamous cell carcinoma of the skin. PMID: 27039776
  37. Preparation of Au-polydopamine functionalized carbon encapsulated FeO magnetic nanocomposites and their application for ultrasensitive detection of carcino-embryonic antigen. PMID: 26868035
  38. Elevated Carcinoembryonic Antigen Levels are associated with Colon Cancer. PMID: 26759308
  39. Baseline serum CEA levels can serve as predictive factors for the treatment of EGFR-TKI in non-small cell lung cancer patients harboring EGFR mutations. PMID: 27072247
  40. BALF and serum NSE, CEA, and CYFRA21.1 elevated in lung cancer, which had prompt value for pathology, especially significant for BALF. PMID: 27072263
  41. Significant levels of CEA, CYFRA 21-1, NSE, and TSGF were detected in the serum. The amounts found were useful for diagnosing non-small cell lung cancer (NSCLC) patients who depended on the currently limited biomarker development. PMID: 27072222
  42. We conclude that patients with high preoperative serum CEA levels should have more intensive follow-up for detection of synchronous liver metastasis. PMID: 26756614
  43. Elevated CEA expression is associated with Gastric Cancer. PMID: 26620645
  44. CEA, NSE, CA125 and pro-GRP could serve as biomarkers for SCLC, and CEA and CYFRA21-1 could serve as biomarkers for NSCLC. Pro-GRP, CA125 and CEA were related to the clinical stages of lung cancer PMID: 26560853
  45. In this phase I/II study, 14 high-risk disease-free ovarian (OC) and breast cancer (BC) patients after completion of standard therapies were vaccinated with MUC1, ErbB2 and carcinoembryonic antigen (CEA) HLA-A2+-restricted peptides and Montanide. PMID: 26892612
  46. combined pre-chemoradiotherapy CEA and post-chemoradiotherapy CEA levels enable more accurate prediction of rectal adenocarcinoma prognosis PMID: 26962798
  47. ESCC patients with lower Cyfra21-1 and CEA, higher miR-7 and severe myelosuppression were much more sensitive to CRT. PMID: 26708917
  48. Cyst fluid CEA levels have a clinically suboptimal accuracy level in differentiating pancreatic mucinous cystic neoplasms from pancreatic nonmucinous cystic neoplasms. PMID: 26077458
  49. High carcinoembryonic antigen expression is associated with Colon Adenomas. PMID: 27100181
  50. Serum CYFRA21-1 and CEA can be used as prognostic factors of NSCLC patients. Combinative detection of the two indices will be more reliable. PMID: 26333429


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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.

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