Human Fc gamma RI/CD64 Biotinylated Antibody

Catalog #: BAF1257 Datasheet / COA / SDS

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BAF1257

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Human Fc gamma RI/CD64 Biotinylated Antibody Summary

Species Reactivity

Human

Specificity

Detects human Fc gamma RI/CD64 in Western blots. In Western blots, approximately 50% cross-reactivity with recombinant mouse Fc gamma RI is observed and less than 1% cross-reactivity with recombinant human (rh) Fc gamma RIIA and rhFc gamma RIIIB is observed.

Source

Polyclonal Goat IgG

Purification

Antigen Affinity-purified

Immunogen

Mouse myeloma cell line NS0-derived recombinant human Fc gamma RI/CD64
Gln16-Pro288
Accession # P12314.2

Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.

Label

Biotin

Purity

Antigen Affinity-purified

Applications

Recommended Concentration

Sample

Western Blot

0.1 µg/mL

Recombinant Human Fc gamma RI/CD64 (Catalog # 1257-FC)

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Reconstitution Calculator

Preparation and Storage

Reconstitution

Reconstitute at 0.2 mg/mL in sterile PBS.

Shipping

The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.

Stability & Storage

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.

12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: Fc gamma RI/CD64

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 (1-3). 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 (~10^‑8‑10^-9 M) capable of binding monomeric IgG, whereas the CD16 and CD32 proteins bind IgG with lower affinities (~10^-6‑10^-7 M) only recognizing IgG aggregates surrounding multivalent antigens (1, 4). 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 (3, 5). 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 (5).

Three highly homologous genes (A, B, and C) sharing 98% identity at the nucleotide level have been identified for the human CD64 group (1). Fc gamma RI is transmembrane protein with three extracellular Ig-like domains, and it delivers an activating signal via the associated Fc R gamma accessory chain. The genes for Fc gamma RIB and Fc gamma RIC contain stop codons within their membrane proximal Ig-like domains indicating possible secreted receptors (1, 6). An mRNA splice variant of Fc gamma RIB has a deletion of the membrane-proximal Ig-like domain and encodes a putative transmembrane receptor (6). The high affinity recognition of IgG by Fc gamma RI permits the triggering of effector responses at low IgG concentrations typical of early immune responses (2). Fc gamma RI is expressed constitutively on monocytes and macrophages and can be induced on neutrophils and eosinophils (1, 4). Its expression is up-regulated during bacterial infections and sepsis.

References

Van de Winkel, J. and P. Capes (1993) Immunol. Today 14:215.
Raghaven, M. and P. Bjorkman (1996) Annu. Rev. Cell Dev. Biol. 12:181.
Ravetch, J. and S. Bolland (2001) Annu. Rev. Immunol. 19:275.
Takai, T. (2002) Nature Rev. Immunol. 2:580.
Ravetch, J. and L. Lanier (2000) Science 290:84.
Ernst, L. et al. (1998) Mol Immunol. 35:943.

Long Name

Fc gamma Receptor I

Entrez Gene IDs

2209 (Human); 14129 (Mouse); 295279 (Rat); 102147198 (Cynomolgus Monkey)

Alternate Names

CD64 antigen; CD64; CD64a; Fc fragment of IgG, high affinity Ia, receptor (CD64); Fc gamma RI; FCG1; Fc-gamma receptor I B2; Fc-gamma RI; Fc-gamma RIA; FcgammaRIa; FCGR1; FcgRI; FcgRIA; FCRI; FcRIA; FLJ18345; high affinity Ia, receptor for (CD64); high affinity immunoglobulin gamma Fc receptor I; IgG Fc receptor I