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Human CEACAM8 ORF mammalian expression plasmid, N-HA tag

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Human CEACAM8 cDNA Clone Product Information
Gene_bank_ref_id:NM_001816.3
RefSeq ORF Size:1050bp
cDNA Description:Full length Clone DNA of Homo sapiens carcinoembryonic antigen-related cell adhesion molecule 8 with N terminal HA tag.
Gene Synonym:CD66b
Species:Human
Vector:pCMV3-SP-N-HA
Plasmid:pCMV3-HA-CEACAM8
Restriction Site:KpnI + XbaI (6kb + 1.04kb)
Tag Sequence:HA Tag Sequence: TATCCTTACGACGTGCCTGACTACGCC
Sequence Description:Identical with the Gene Bank Ref. ID sequence.
Sequencing primers:T7(TAATACGACTCACTATAGGG) BGH(TAGAAGGCACAGTCGAGG)
Promoter:Enhanced CMV mammalian cell promoter
Application:Stable or Transient mammalian expression
Antibiotic in E.coli:Kanamycin
Antibiotic in mammalian cell:Hygromycin
Shipping_carrier:Each tube contains lyophilized plasmid.
Storage:The lyophilized plasmid can be stored at room temperature for three months.
HA Tag Info

Human influenza hemagglutinin (HA) is a surface glycoprotein required for the infectivity of the human virus. The HA tag is derived from the HA-molecule corresponding to amino acids 98-106 has been extensively used as a general epitope tag in expression vectors. Many recombinant proteins have been engineered to express the HA tag, which does not appear to interfere with the bioactivity or the biodistribution of the recombinant protein. This tag facilitates the detection, isolation, and purification of the proteins.

The actual HA tag is as follows: 5' TAC CCA TAC GAT GTT CCA GAT TAC GCT 3' or 5' TAT CCA TAT GAT GTT CCA GAT TAT GCT 3' The amino acid sequence is: YPYDVPDYA.

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Background

CEACAM8, also known as CD66b or NCA-95, is a single chain, GPI-anchored, highly glycosylated protein belonging to the carcinoembryonic antigen family. There are four members in this family: CD66a, CD66b, CD66c, and CD66d. Members of CEACAM family are widely expressed especially on human neutrophils, and, depending on the tissue, capable of regulating diverse functions including tumor promotion, tumor suppression, angiogenesis, and neutrophil activation. Abnormal overexpression and downregulation of some CEACAMs have been described in tumor cells. Monoclonal antibodies grouped in the CD66 cluster recognize CEACAM members. Ectopic CD66 expression is commonly detected in B-cell lineage acute lymphoblastic leukemia (ALL). CEACAM8(CD66b) is also an activation marker for human granulocytes. However, its biological functions are largely unknown in eosinophils. It has been reported that CD66b is highly expressed on the surface of human peripheral blood eosinophils isolated from healthy individuals. Engagement of CD66b by mAb or a natural ligand, galectin-3, activated a Src kinase family molecule, hemopoietic cell kinase (Hck), and induced cellular adhesion, superoxide production, and degranulation of eosinophils. CD66b molecules were localized in lipid rafts, and disruption of lipid rafts or removal of the GPI anchor inhibited the adhesion and activation of eosinophils. Importantly, CD66b was constitutively and physically associated with a beta2 integrin, CD11b, and cross-linking of CD66b induced a striking clustering of CD11b molecules. Thus, CD66b molecules are involved in regulating adhesion and activation of eosinophils, possibly through their localization in lipid rafts and interaction with other cell surface molecules, such as CD11b. Binding of exogenous or endogenous carbohydrate ligands(s) to CD66b may be important in the release of proinflammatory mediators by human eosinophils.

References
  • Yoon J, et al. (2007) CD66b regulates adhesion and activation of human eosinophils. J Immunol. 179 (12): 8454-62.
  • Skubitz KM, et al. (1996) CD6a, CD66b, CD66c, and CD66d each independently stimulate neutrophils. J Leukoc Biol. 60 (1): 106-17.
  • Skubitz KM, et al. (2008) Inte rdependency of CEACAM-1, -3, -6, and -8 induced human neutrophil adhesion to endothelial cells. J Transl Med. 6: 78.
  • Lasa A, et al. (2008) High expression of CEACAM6 and CEACAM8 mRNA in acute lymphoblastic leukemias. Ann Hematol. 87 (3): 205-11.
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    Catalog: HG11729-NY
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    Please note: All products are "FOR RESEARCH USE ONLY AND ARE NOT INTENDED FOR DIAGNOSTIC OR THERAPEUTIC USE"