- Catalog number
- PB9785
- Size / count
- 100 µg/Vial
- Dry ice
- No
- Hazardous
- No
- Discontinued
- No
- Background
- CD45 (Cluster of Differentiation 45), also known as PTPRC, LCA or CD45R, is an enzyme that, in humans, is encoded by the PTPRC gene. It is a member of the protein tyrosine phosphatase (PTP) family. CD45 is a major high molecular mass leukocyte cell surface molecule which is also an integral membrane protein tyrosine phosphatase. The cytogenetic location of CD45 is 1q31.3-q32.1. This gene is especially a prototype for transmembrane protein-tyrosine phosphatase (PTP) . Targeted disruption of the CD45 gene leads to enhanced cytokine and interferon receptor-mediated activation of JAKs and STAT proteins. In vitro, CD45 ly dephosphorylates and binds to JAKs. Functionally, CD45 negatively regulates interleukin-3-mediated cellular proliferation, erythropoietin-dependent hematopoiesis, and antiviral responses in vitro and in vivo. In addition, CD45 has been best studied in T cells, where it determines T cell receptor signaling thresholds. CD45 is moved into or out of the immunological synapse (IS) membrane microdomain depending on the relative influence of interaction with the extracellular galectin lattice or the intracellular actin cytoskeleton. Galectin interaction can be finetuned by varying usage of the heavily Oglycosylated spliced regions and sialylation of Nlinked carbohydrates.
- Synonyms
- Receptor-type tyrosine-protein phosphatase C;3.1.3.48; Leukocyte common antigen; L-CA; T200; CD45; PTPRC; CD45
- Gene Name
- PTPRC
- Gene ID
- 5788
- UniProt
- P08575
- Host
- Rabbit
- Reactivity
- Human
- Cross Reactivity
- No cross-reactivity with other proteins.
- Immunogen
- A synthetic peptide corresponding to a sequence at the C-terminus of human CD45, different from the related mouse sequence by eight amino acids, and from the related rat sequence by ten amino acids.
- Clonality
- Polyclonal
- Tissue Specificity
- Expressed in breast, placenta, kidney, liver and pancreas. .
- Applications
- Flow Cytometry, IF, IHC, WB
- Field of Research
- Adapters, Adaptive Immunity, B Cells, Cell Type Markers, Immunology, Protein Phosphorylation, Signal Transduction, T Cells, Transmembrane, Tyrosine Phosphatases
- Purification
- Immunogen affinity purified.
- Concentration
- Adding 0.2 ml of distilled water will yield a concentration of 500 μg/ml.
- Form
- Lyophilized
- Reconstitution
- Add 0.2ml of distilled water will yield a concentration of 500ug/ml.
- Function
- Protein tyrosine-protein phosphatase required for T-cell activation through the antigen receptor. Acts as a positive regulator of T-cell coactivation upon binding to DPP4. The first PTPase domain has enzymatic activity, while the second one seems to affect the substrate specificity of the first one. Upon T-cell activation, recruits and dephosphorylates SKAP1 and FYN. Dephosphorylates LYN, and thereby modulates LYN activity (By similarity) . .
- References & Citations
- 1. Anderson, J.N. et al. (2004) FASEB J. 18:8. 2. Akao, Y., Utsumi, K. R., Naito, K., Ueda, R., Takahashi, T., Yamada, K. Chromosomal assignments of genes coding for human leukocyte common antigen, T-200, and lymphocyte function-associated antigen 1, LFA-1 beta subunit. Somat. Cell Molec. Genet. 13: 273-278, 1987. 3. Falahti, R. and D. Leitenberg (2008) J. Immunol. 181:6082.
- Storage Conditions
- Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.
- Calculated Molecular Weight
- 147254 MW
- Observed Molecular Weight
- 220 kDa
- Specificity
- No cross reactivity with other proteins.
- Applications Notes
- 6
- Gene Name Synonym
- Receptor-type tyrosine-protein phosphatase C
- Subcellular Location
- Membrane ; Single-pass type I membrane protein . Membrane raft . Colocalized with DPP4 in membrane rafts.
- Protein Name
- Receptor-type tyrosine-protein phosphatase C
- Isotype
- Rabbit IgG
- Contents
- Each vial contains 4 mg Trehalose, 0.9 mg NaCl and 0.2 mg Na2HPO4.