Description
Receptors for the Fc region of IgG (Fc gamma Rs) are members of the Ig superfamily that function in the activation or inhibition of immune responses such as degranulation, phagocytosis, ADCC (antibody-dependent cellular toxicity), cytokine release, and B cell proliferation. The Fc gamma Rs have been divided into three classes based on close relationships in their extracellular domains; these groups are designated Fc gamma RI (also known as CD64), Fc gamma RII (CD32), and Fc gamma RIII (CD16). Each group may be encoded by multiple genes and exist in different isoforms depending on species and cell type. The CD64 proteins are high affinity receptors capable of binding monomeric IgG, whereas the CD16 and CD32 proteins bind IgG with lower affinities only recognizing IgG aggregates surrounding multivalent antigens. Fc gamma Rs that deliver an activating signal either have an intrinsic immunoreceptor tyrosine-based activation motif (ITAM) within their cytoplasmic domains or associate with one of the ITAM-bearing adapter subunits, Fc R gamma or zeta. The only inhibitory member in human and mouse, Fc gamma RIIb, has an intrinsic cytoplasmic immunoreceptor tyrosine-based inhibitory motif (ITIM). The coordinated functioning of activating and inhibitory receptors is necessary for successful initiation, amplification, and termination of immune responses.
Specifications
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Synonyms |
CD64; CD64a; Fc gamma RI; FCG1; Fc-gamma RIA; FCGR1; FcgRI; FCRI; FcRIA; FLJ18345; FCGR1A; IGFR1; Fcr; Fcgr; FCE1A; FcERI |
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Uniprot No. |
P12314-1 |
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Source |
Recombinant Human Fc gamma RI/CD64 Protein is expressed from HEK293 Cells with His tag and Avi tag at the C-terminal. It contains Gln16-Pro288. |
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Molecular Weight |
The protein has a predicted MW of 33.5 kDa. Due to glycosylation, the protein migrates to 50-70 kDa based on Tris-Bis PAGE result. |
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Physical Appearance |
Sterile Filtered White lyophilized (freeze-dried) powder. |
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Purity |
> 95% as determined by SDS-PAGE and HPLC |
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Activity |
SPR Data: Human Fc gamma RI, His Tag captured on CM5 Chip via Anti-His Antibody can bind Herceptin, hFc Tag with an affinity constant of 11.3nM as determined in SPR assay. |
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Endotoxin |
< 1.0 EU per 1μg of the protein by the LAL method. |
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Formulation |
Lyophilized from 0.22 μm filtered solution in PBS (pH 7.4). Normally 5% trehalose is added as protectant before lyophilization. |
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Reconstitution |
Centrifuge tubes before opening. Reconstituting to a concentration more than 100 μg/mL is recommended (usually we use 1 mg/mL solution for lyophilization). Dissolve the lyophilized protein in distilled water. |
Storage
The product should be stored at -20~-80℃ for 1 year from date of receipt.
2-7 days, 2 ~8 °C under sterile conditions after reconstitution.
3-6 months, -20~-80℃ under sterile conditions after reconstitution.
Recommend to aliquot the protein into smaller quantities when first used and avoid repeated freeze-thaw cycles.
Note
1. Avoid repeated freezing and thawing.
2. Please operate with lab coats and disposable gloves, for your safety.
3. This product is for research use only.
Product Data
Figure 1.The purity of Human Fc gamma RI is greater than95% as determined by Tris-Bis PAGE and SEC-HPLC.
Figure 2. Human Fc gamma RI, His Tag captured on CM5Chip via Anti-His Antibody can bind Herceptin, hFcTag with an affinity constant of 11.3nMas determined in SPR assay (Biacore T200).
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The product is for research purposes only and is not intended for therapeutic or diagnostic use in humans or animals. Products and content are protected by patents, trademarks, and copyrights owned by Yeasen Biotechnology. Trademark symbols indicate the country of origin, not necessarily registration in all regions.
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