CD55 / DAF cDNA ORF Clone, Human, N-His tag General Information
Full length Clone DNA of Human CD55 molecule, decay accelerating factor for complement (Cromer blood group), transcript variant 1 with N terminal His tag.
Enhanced CMV promoter
His Tag Sequence: CACCATCACCACCATCATCACCACCATCAC
T7( 5' TAATACGACTCACTATAGGG 3' )
BGH( 5' TAGAAGGCACAGTCGAGG 3' )
The plasmid is confirmed by full-length sequencing.
Antibiotic in E.coli
Antibiotic in Mammalian cell
Stable or Transient mammalian expression
Storage & Shipping
Each tube contains lyophilized plasmid.
The lyophilized plasmid can be stored at ambient temperature for three months.
**Sino Biological guarantees 100% sequence accuracy of all synthetic DNA constructs we deliver, but we do not guarantee protein expression in your experimental system. Protein expression is influenced by many factors that may vary between experiments or laboratories.**
CD55 / DAF cDNA ORF Clone, Human, N-His tag Alternative Names
CR cDNA ORF Clone, Human;CROM cDNA ORF Clone, Human;DAF cDNA ORF Clone, Human;TC cDNA ORF Clone, Human
CD55 / DAF Background Information
CD55, also well known as decay-accelerating factor (DAF), is a member of the RCA (regulators of complement activation) family characterized by four to 30 SCRs (short consensus repeats) in their plasma-exposed regions. It is a major regulator of the alternative and classical pathways of complement activation and is expressed on all serum-exposed cells. CD55 is physiologically acting as an inhibitor of the complement system, but is also broadly expressed in malignant tumours. DAF seems to exert different functions beyond its immunological role such as promotion of tumorigenesis, decrease of complement mediated tumor cell lysis, autocrine loops for cell rescue and evasion of apoptosis, neoangiogenesis, invasiveness, cell motility. It is commonly hijacked by invading pathogens, including many enteroviruses and uropathogenic Escherichia coli, to promote cellular attachment prior to infection. This 70-75 kDa glycoprotein CD55 containing four SCR modules is involved in the regulation of the complement cascade. It inhibits complement activation by suppressing the function of C3/C5 convertases, thereby limiting local generation or deposition of C3a/C5a and membrane attack complex (MAC or C5b-9) production. DAF has been identified as a ligand for an activation-associated, seven-transmembrane lymphocyte receptor, CD97, which is a receptor mediating attachment and infection of several viruses and bacteria. In addition, it has been shown that DAF regulates the interplay between complement and T cell immunity in vivo, and thus may be implicated in immune and tumor biology.
CD55 molecule, decay accelerating factor for complement (Cromer blood group)
Lea S. (2002) Interactions of CD55 with non-complement ligands. Biochem Soc Trans. 30(Pt 6): 1014-9.Mikesch JH, et al. (2006) The expression and action of decay-accelerating factor (CD55) in human malignancies and cancer therapy. Cell Oncol. 28(5-6): 223-32.Wang Y, et al. (2010) Decay accelerating factor (CD55) protects neuronal cells from chemical hypoxia-induced injury. J Neuroinflammation. 7:24.