CD3 Antibody (OKT3) - BSA Free

Novus Biologicals, part of Bio-Techne | Catalog # NBP2-25186

Clone OKT3 was used by HLDA to establish CD designation.
Novus Biologicals, part of Bio-Techne

Key Product Details

Species Reactivity

Validated:

Human, Mouse

Cited:

Human, Mouse

Applications

Validated:

Flow Cytometry, Functional, Immunoblotting, In vitro assay, In vivo assay, Western Blot

Cited:

Flow Cytometry, Functional Assay, In vitro assay, In vivo assay, Western Blot

Label

Unconjugated

Antibody Source

Monoclonal Mouse IgG2a Kappa Clone # OKT3

Format

BSA Free

Concentration

1.0 mg/ml

View all CD3 Antibodies »

Product Specifications

Immunogen

This CD3 antibody was developed against human PBMCs.

Clonality

Monoclonal

Host

Mouse

Isotype

IgG2a Kappa

Theoretical MW

23.1 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.

Scientific Data Images for CD3 Antibody (OKT3) - BSA Free

Flow Cytometry: CD3 Antibody (OKT3) - BSA Free [NBP2-25186]

Flow Cytometry: CD3 Antibody (OKT3) - BSA Free [NBP2-25186]

Flow Cytometry: CD3 Antibody (OKT3) [NBP2-25186] - Analysis using Alexa Fluor (R) 488 conjugate of NBP2-24867. A cell surface stain was performed on hPBMCs with CD8 Alpha antibody (RPA-T8) NBP2-25195 (top image) and a matched isotype control NBP2-27287 (bottom image). Cells were incubated in an antibody dilution of 1:200 for 20 minutes at room temperature. Both antibodies were conjugated to PerCP. A co-stain was also performed using CD3 antibody NBP2-24867AF488.
Flow Cytometry: CD3 Antibody (OKT3) - BSA Free [NBP2-25186]

Flow Cytometry: CD3 Antibody (OKT3) - BSA Free [NBP2-25186]

Flow Cytometry: CD3 Antibody (OKT3) [NBP2-25186] - Analysis using the Alexa Fluor(R) 700 conjugate of NBP2-24867. Staining of human PBMC. Flow cytometry image submitted by a verified customer review.
Flow Cytometry: CD3 Antibody (OKT3) - BSA Free [NBP2-25186]

Flow Cytometry: CD3 Antibody (OKT3) - BSA Free [NBP2-25186]

Flow Cytometry: CD3 Antibody (OKT3) [NBP2-25186] - Analysis using Azide Free version of NBP2-25186. CD3+ hPMBCs using the APC conjugate of this antibody. A cell surface stain was performed on CD3+ hPBMCs with V alpha 24 J alpha 18 TCR antibody (6B11) NBP2-00267PE (top image) and a matched isotype control
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Applications for CD3 Antibody (OKT3) - BSA Free

Application
Recommended Usage

Immunoblotting

reported in scientific literature (PMID 23880762)

Western Blot

reported in scientific literature (PMID 28699640)
Please Note: Optimal dilutions of this antibody should be experimentally determined.

Formulation, Preparation, and Storage

Purification

Protein G purified

Formulation

PBS

Format

BSA Free

Preservative

0.02% Sodium Azide

Concentration

1.0 mg/ml

Shipping

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

Stability & Storage

Store at 4C short term. Aliquot and store at -20C long term. Avoid freeze-thaw cycles.

Background: CD3

CD3 (cluster of differentiation marker 3) is a multi-subunit transmembrane protein that is expressed on the surface of T-cells and forms a complex with the T-cell receptor (TCR) (1-3). CD3 consists of four distinct membrane protein isoforms: CD3-delta (delta), CD3-epsilon (epsilon), CD3-gamma, and CD3-zeta (1-3). The CD3 subunits organize into a complex containing three sets of dimers: CD3-epsilondelta, CD3-epsilongamma, CD3-zetazeta. The CD3 complex binds to the TCR heterodimer (alphabeta or gammadelta) to form the transmembrane TCR-CD3 complex (2-3). Structurally, the CD3 protein chains have an extracellular region, a transmembrane domain, and a cytoplasmic trail region (2-3). The CD3-epsilondelta and CD3-epsilongamma heterodimers also contain an extracellular immunoglobulin (Ig)-like domain, classifying them as part of the immunoglobulin superfamily (2-3). The cytoplasmic tail of each CD3 chain also contains one (delta, epsilon, gamma) or three (zeta) immunoreceptor tyrosine-based activation motifs (ITAMs), for a total of 10 ITAMs in the whole CD3 complex (2-3). Following, TCR binding to peptide major histocompatibility complex (p-MHC), the CD3 ITAMs are phosphorylated by the Src kinase Lck and are important for recruiting ZAP70 and initiating TCR signaling cascade activation (2). While similar in structure, the CD3 chains vary in length and molecular weight (4). The CD3-delta is 171 amino acids (aa) in length with a theoretical molecular weight of 18.9 kDa (4, 5). The CD3-epsilon is 204 aa long and has a theoretical molecular weight of 23 kDa (4, 5). CD3-gamma is 182 aa long with a theoretical molecular weight of 20.4 kDa (4, 5). Finally, CD3-zeta is 164 aa in length with a theoretical molecular weight of 18.6 kDa (4, 5).

CD3 proteins are expressed on the surface of thymocytes during thymocyte development, proliferation, and maturation to T-cells (4, 6, 7). During T-cell development CD4-CD8- double negative (DN) cells differentiate to CD4+CD8+ double positive (DP) cells before progressing to single positive (SP) CD4+ helper T-cells or CD8+ cytotoxic T-cells (4, 6, 7). As CD3 plays an important role in thymocyte development, it is understandable that CD3 defects and mutations in CD3 protein chains cause severe combined immunodeficiencies (SCIDs) (8). Additionally, a subset of CD3+ T-cells that co-express CD20 are described in a variety of diseases including rheumatoid arthritis, multiple sclerosis, CD20+ T-cell leukemia/lymphoma, and HIV (9). Clinical trials and animal models have shown that anti-CD3 monoclonal antibodies are a promising treatment modality for inflammatory disorders and autoimmune diseases, such as type I diabetes (10).

References

1. Chetty, R., & Gatter, K. (1994). CD3: structure, function, and role of immunostaining in clinical practice. The Journal of pathology. https://doi.org/10.1002/path.1711730404

2. Mariuzza, R. A., Agnihotri, P., & Orban, J. (2020). The structural basis of T-cell receptor (TCR) activation: An enduring enigma. The Journal of biological chemistry. https://doi.org/10.1074/jbc.REV119.009411

3. Kuhns, M. S., Davis, M. M., & Garcia, K. C. (2006). Deconstructing the form and function of the TCR/CD3 complex. Immunity. https://doi.org/10.1016/j.immuni.2006.01.006

4. Clevers, H., Alarcon, B., Wileman, T., & Terhorst, C. (1988). The T cell receptor/CD3 complex: a dynamic protein ensemble. Annual review of immunology. https://doi.org/10.1146/annurev.iy.06.040188.003213

5. Uniprot: CD3-delta (P04234), CD3-epsilon (P07766), CD3-gamma (P09693), CD3-zeta (P20963)

6. D'Acquisto, F., & Crompton, T. (2011). CD3+CD4-CD8- (double negative) T cells: saviours or villains of the immune response?. Biochemical pharmacology. https://doi.org/10.1016/j.bcp.2011.05.019

7. Dave V. P. (2009). Hierarchical role of CD3 chains in thymocyte development. Immunological reviews. https://doi.org/10.1111/j.1600-065X.2009.00835.x

8. Fischer, A., de Saint Basile, G., & Le Deist, F. (2005). CD3 deficiencies. Current opinion in allergy and clinical immunology. https://doi.org/10.1097/01.all.0000191886.12645.79

9. Chen, Q., Yuan, S., Sun, H., & Peng, L. (2019). CD3+CD20+ T cells and their roles in human diseases. Human immunology. https://doi.org/10.1016/j.humimm.2019.01.001

10. Kuhn, C., & Weiner, H. L. (2016). Therapeutic anti-CD3 monoclonal antibodies: from bench to bedside. Immunotherapy. https://doi.org/10.2217/imt-2016-0049

Alternate Names

CD_antigen: CD3e, CD3 antigen, delta subunit, CD3d antigen, CD3d antigen, delta polypeptide (TiT3 complex), CD3d molecule, delta (CD3-TCR complex), CD3-DELTA, CD3e, CD3e antigen, CD3e antigen, epsilon polypeptide (TiT3 complex), CD3e molecule, epsilon (CD3-TCR complex), CD3-epsilon, CD3G, CD3g antigen, CD3g antigen, gamma polypeptide (TiT3 complex), CD3g molecule, epsilon (CD3-TCR complex), CD3g molecule, gamma (CD3-TCR complex), CD3-GAMMA, FLJ17620, FLJ17664, FLJ18683, FLJ79544, FLJ94613, IMD18, MGC138597, T3DOKT3, delta chain, T3E, T-cell antigen receptor complex, epsilon subunit of T3, T-cell receptor T3 delta chain, T-cell surface antigen T3/Leu-4 epsilon chain, T-cell surface glycoprotein CD3 delta chain, T-cell surface glycoprotein CD3 epsilon chain, TCRE

Gene Symbol

CD3E

Additional CD3 Products

Product Documents for CD3 Antibody (OKT3) - BSA Free

Product Datasheets

Certificate of Analysis

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Product Specific Notices for CD3 Antibody (OKT3) - BSA Free

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

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