Catalog #CP083
RecombiMAb anti-mouse CD3ε (LALA-PG)
Clone
145-2C11-CP083
Reactivities
Mouse
Isotype
Mouse IgG2a (LALA-PG), κ
(switched from Armenian Hamster IgG1)
(switched from Armenian Hamster IgG1)
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Product Description
The 145-2C11-CP083 monoclonal antibody is a recombinant, Fc-engineered chimeric version of the original 145-2C11 antibody. The variable domain sequences are identical but the constant region sequences have been switched from hamster IgG1 to mouse IgG2a, κ for use in murine models. Species-matched chimeric antibodies demonstrate reduced immunogenicity and formation of anti-drug antibodies (ADAs) compared to xenogenic antibodies in animal models. Additionally, 145-2C11-CP083 contains LALA-PG mutations in the heavy chain Fc fragment rendering it unable to bind endogenous murine Fcγ receptors or C1q to induce antibody-dependent, cell-mediated cytotoxicity (ADCC) or complement-dependent cytotoxicity (CDC). Studies have shown recombinant, Fc-silenced 145-2C11 minimizes cytokine‑release and acute toxicity while retaining CD3‑TCR downregulation, T-cell killing and immunosuppressive function. The LALA-PG variant has demonstrated significantly reduced effector function, C1q binding and C3 fixation compared to other common silencing mutations such as the D265A and DANG variants while retaining favorable biophysical and manufacturing properties. The highly controlled sequence and lack of genetic drift in recombinant antibodies provide more reliable and reproducible results over hybridoma derived antibodies.
The 145-2C11-CP083 monoclonal antibody reacts with mouse CD3ε, a 20 kDa transmembrane cell-surface protein that belongs to the immunoglobulin superfamily. CD3ε is one of five polypeptide chains that combine to form the TCR complex. CD3ε is expressed on T lymphocytes, NK-T cells, and to varying degrees on developing thymocytes. CD3 plays roles in TCR signaling, T lymphocyte activation, and antigen recognition. Additionally, the 145-2C11 antibody has been reported to block the binding of the 17A2 antibody to CD3ε+ T lymphocytes.
References:
Alegre, M L et al. “An anti-murine CD3 monoclonal antibody with a low affinity for Fc gamma receptors suppresses transplantation responses while minimizing acute toxicity and immunogenicity.” Journal of immunology (Baltimore, Md. : 1950) vol. 155,3 (1995): 1544-55.
Dépis, Fabien et al. “Characterization of a surrogate murine antibody to model anti-human CD3 therapies.” mAbs vol. 5,4 (2013): 555-64. doi:10.4161/mabs.24736
Hale, Geoff. “Living in LALA land? Forty years of attenuating Fc effector functions.” Immunological reviews vol. 328,1 (2024): 422-437. doi:10.1111/imr.13379
The 145-2C11-CP083 monoclonal antibody reacts with mouse CD3ε, a 20 kDa transmembrane cell-surface protein that belongs to the immunoglobulin superfamily. CD3ε is one of five polypeptide chains that combine to form the TCR complex. CD3ε is expressed on T lymphocytes, NK-T cells, and to varying degrees on developing thymocytes. CD3 plays roles in TCR signaling, T lymphocyte activation, and antigen recognition. Additionally, the 145-2C11 antibody has been reported to block the binding of the 17A2 antibody to CD3ε+ T lymphocytes.
References:
Alegre, M L et al. “An anti-murine CD3 monoclonal antibody with a low affinity for Fc gamma receptors suppresses transplantation responses while minimizing acute toxicity and immunogenicity.” Journal of immunology (Baltimore, Md. : 1950) vol. 155,3 (1995): 1544-55.
Dépis, Fabien et al. “Characterization of a surrogate murine antibody to model anti-human CD3 therapies.” mAbs vol. 5,4 (2013): 555-64. doi:10.4161/mabs.24736
Hale, Geoff. “Living in LALA land? Forty years of attenuating Fc effector functions.” Immunological reviews vol. 328,1 (2024): 422-437. doi:10.1111/imr.13379
Specifications
| Isotype | Mouse IgG2a (LALA-PG), κ |
|---|---|
| Recommended Isotype Control(s) | RecombiMAb mouse IgG2a (LALA-PG) isotype control, anti-hen egg lysozyme |
| Recommended Dilution Buffer | InVivoPure pH 7.0 Dilution Buffer |
| Mutations | LALA-PG |
| Immunogen | Mouse BM10-37 cytotoxic T cells |
| Reported Applications |
in vitro T cell stimulation/activation in vivo T cell stimulation/activation Immunofluorescence Flow cytometry Western blot *Reported for the original 145-2C11 antibody. For information on in vivo applications, please contact technicalservice@bioxcell.com |
| Formulation |
PBS, pH 7.0 Contains no stabilizers or preservatives |
| Endotoxin |
≤0.5EU/mg (≤0.0005EU/μg) Determined by LAL assay |
| Aggregation* | <5%, Determined by SEC |
| Purity |
≥95% Determined by SDS-PAGE |
| Sterility | 0.2 µm filtration |
| Production | Purified from mammalian cell supernatant in an animal-free facility |
| Purification | Protein G |
| Molecular Weight | 150 kDa |
| Murine Pathogen Tests |
Ectromelia/Mousepox Virus: Negative Hantavirus: Negative K Virus: Negative Lactate Dehydrogenase-Elevating Virus: Negative Lymphocytic Choriomeningitis virus: Negative Mouse Adenovirus: Negative Mouse Cytomegalovirus: Negative Mouse Hepatitis Virus: Negative Mouse Minute Virus: Negative Mouse Norovirus: Negative Mouse Parvovirus: Negative Mouse Rotavirus: Negative Mycoplasma Pulmonis: Negative Pneumonia Virus of Mice: Negative Polyoma Virus: Negative Reovirus Screen: Negative Sendai Virus: Negative Theiler’s Murine Encephalomyelitis: Negative |
| Storage | The antibody solution should be stored at the stock concentration at 4°C. Do not freeze. |
| Need a Custom Formulation? | See All Antibody Customization Options |