Density Enhanced Protein Tyrosine Phosphatase (DEP-1), also known as CD148, HPTP-eta, and PTP receptor type J (PTPRJ), is an enzyme that removes phosphate groups covalently attached to tyrosine residues in proteins. A large (220 kilodalton) glycoprotein found at the cell surface, DEP-1 levels are increased with high cell density (1). DEP-1 phosphatase activity is enhanced by basement membrane proteins (2), suggesting it is involved in regulating cell adhesion and contact interactions. High levels of expression dampen PDGF (3), VEGF (4), and T-cell receptor (5) responses. DEP-1 is widely expressed in tissues, particularly ones forming epithelioid monolayers (6). In the immune system, DEP-1 is found on all cell lineages and is highest on granulocytes (7). Dep-1 is the mutated gene in the Susceptibility to Colon Cancer locus Scc1, which is altered in many human colorectal adenomas (8). Gene knockout mice lacking DEP-1 die at midgestation due to failures in cardiovascular development (9). DEP-1 dephosphorylates a variety of proteins, including the HGF (10), PDGF (11), and VEGF (4) receptors, and beta ‑catenin (12). The recombinant protein is the intracellular region of DEP-1 containing the catalytic domain. Over aa 997-337, human Dep-1 shares 95% aa sequence identity with mouse and rat Dep-1.
Human/Mouse/Rat DEP‑1/CD148 Antibody
R&D Systems | Catalog # AF1934
Key Product Details
Validated by
Knockout/Knockdown
Species Reactivity
Validated:
Human, Mouse, Rat
Cited:
Human, Mouse, Primate - Cercopithecus aethiops (African Green Monkey), Transgenic Mouse
Applications
Validated:
Western Blot, Immunoprecipitation
Cited:
Immunohistochemistry, Western Blot, Flow Cytometry, Immunocytochemistry, Immunoprecipitation, In Situ PLA
Label
Unconjugated
Antibody Source
Polyclonal Goat IgG
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Product Specifications
Immunogen
E. coli-derived recombinant human DEP‑1/CD148
Arg997-Ala1337
Accession # Q12913
Arg997-Ala1337
Accession # Q12913
Specificity
Detects human, mouse, and rat DEP-1/CD148 in Western blots.
Clonality
Polyclonal
Host
Goat
Isotype
IgG
Scientific Data Images for Human/Mouse/Rat DEP‑1/CD148 Antibody
Detection of Human DEP‑1/CD148 by Western Blot.
Western blot shows lysates of HeLa human cervical epithelial carcinoma cell line. PVDF membrane was probed with 1 µg/mL of Goat Anti-Human/Mouse/Rat DEP-1/CD148 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF1934) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF109). A specific band was detected for DEP-1/CD148 at approximately 220 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.Detection of Monkey DEP-1/CD148 by Immunocytochemistry/Immunofluorescence
Proximity ligation assay reveals association of DEP-1 with its substrate FLT3.(A) COS7 cells were transiently transfected with expression constructs for FLT3, DEP-1, the catalytically inactive DEP-1 C1239S trapping mutant, or corresponding control plasmids as indicated. Complex formation was measured by in situ PLA using rabbit anti-FLT3 antibodies, goat anti-DEP-1 antibodies, and corresponding secondary reagents. In situ PLA is indicated by red signals of the rolling cycle amplification products (RCPs). FLT3 expression (green) was visualized by additional staining with FITC-labeled anti-rabbit IgG antibodies; nuclei (blue) were counterstained with Hoechst 33342. Scale bars 20 µm. (B), (C) Complex formation of endogenous DEP-1 with endogenous FLT3 in THP-1 cells. Cells were transfected with DEP-1-specific or control siRNA by Nucleofection, were then starved and either left unstimulated or were stimulated with FL (100 ng/ml) for 10 min as indicated. (B) Example images; DEP-1 knockdown efficiency was detected by immunblotting (lower panel). DEP-1-FLT3 complexes as RCPs are shown in red, nuclei are depicted in blue and scale bars represent 20 µm for the overview images and 5 µm for the insets. (C) Quantification of detected in situ PLA signals over 5 images per variant. The data are representative for 3 experiments with consistent results. Image collected and cropped by CiteAb from the following publication (https://pubmed.ncbi.nlm.nih.gov/23650535), licensed under a CC-BY license. Not internally tested by R&D Systems.Detection of DEP-1/CD148 by Western Blot
Rescue of Defective ERK Signaling in VEGF-A-Stimulated Nrp1cyto Arterial EC by Knockdown of PTP1bPrimary arterial EC from Nrp1cyto mice transfected with siRNA specific for the indicated phosphatases were serum-starved and then stimulated with 50 ng/ml VEGF-A165.(A and B) Knockdown of the indicated phosphatases in Nrp1cyto arterial EC shown by immunoblotting (A); PTP1b knockdown was quantified in (B), dashed line indicates normal expression levels.(C and D) ERK and VEGFR2 (Y1175) phosphorylation after knockdown of the indicated phosphatases shown by immunoblotting (C). Quantification of pERK activation is shown in (D) (n = 3, mean ± SD, *p < 0.05). Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/23639442), licensed under a CC-BY license. Not internally tested by R&D Systems.Detection of DEP-1/CD148 by Western Blot
DEP-1 regulates FL-stimulated FLT3 signaling. DEP-1 expression was stably downregulated in THP-1 cells by lentiviral transduction of shRNA.Control cells harbor a non-targeting shRNA construct. (A) FL-dependent ERK1/2 activation was assessed by immunoblotting of cell lysate samples with antibodies recognizing activated ERK1/2 (pERK1/2). Loading was analyzed by reblot with ERK1/2 antibodies. Representative experiment; the efficiency of stable DEP-1 knockdown is also shown (upper panel). (B) Quantitative data for 4 independent experiments. Numbers represent pERK1/2 signals normalized to ERK1/2 levels in the same sample. The value of control cells at 10 min was set to 1.0. Significance for the difference between responses of the two different cell pools was determined by two-way ANOVA. Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/23650535), licensed under a CC-BY license. Not internally tested by R&D Systems.Applications for Human/Mouse/Rat DEP‑1/CD148 Antibody
Application
Recommended Usage
Immunoprecipitation
2.5 µg/500 µg cell lysate
Sample: HeLa human cervical epithelial carcinoma cell line, see our available Western blot detection antibodies
Sample: HeLa human cervical epithelial carcinoma cell line, see our available Western blot detection antibodies
Western Blot
1 µg/mL
Sample: HeLa human cervical epithelial carcinoma cell line
Sample: HeLa human cervical epithelial carcinoma cell line
Formulation, Preparation, and Storage
Purification
Antigen Affinity-purified
Reconstitution
Reconstitute at 0.2 mg/mL in sterile PBS. For liquid material, refer to CoA for concentration.
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Formulation
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.
Shipping
Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store 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.
Calculators
Background: DEP-1/CD148
References
- Ostman, A. et al. (1994) Proc. Natl. Acad. Sci. USA 91:9680.
- Sorby, M. et al. (2001) Oncogene 20:5219.
- Jandt, E. et al. (2003) Oncogene 22:4175.
- Lampugnani, M.G. et al. (2003) J. Cell Biol. 161:793.
- Baker, J.E. et al. (2001) Mol. Cell. Biol. 21:2393.
- Borges, L.G. et al. (1996) Circ. Res. 79:570.
- de la Fuente-Garcia, M.A. et al. (1998) Blood 91:2800.
- Ruivenkamp, C.A. et al. (2002) Nat. Genet. 31:295.
- Takahashi, T. et al. (2003) Mol. Cell. Biol. 23:1817.
- Palka, H.L. et al. (2003) J. Biol. Chem. 278:5728.
- Kovalenko, M. et al. (2000) J. Biol. Chem. 275:16219.
- Holsinger, L.J. et al. (2002) Oncogene 21:7067.
Long Name
Density Enhanced Receptor Protein Tyrosine Phosphatase
Alternate Names
CD148, DEP1, HPTP-eta, PTPRJ
Gene Symbol
PTPRJ
UniProt
Additional DEP-1/CD148 Products
Product Documents for Human/Mouse/Rat DEP‑1/CD148 Antibody
Certificate of Analysis
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Note: Certificate of Analysis not available for kit components.
Product Specific Notices for Human/Mouse/Rat DEP‑1/CD148 Antibody
For research use only
Citations for Human/Mouse/Rat DEP‑1/CD148 Antibody
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Protocols
Find general support by application which include: protocols, troubleshooting, illustrated assays, videos and webinars.
- Cellular Response to Hypoxia Protocols
- Immunoprecipitation Protocol
- R&D Systems Quality Control Western Blot Protocol
- Troubleshooting Guide: Western Blot Figures
- Western Blot Conditions
- Western Blot Protocol
- Western Blot Protocol for Cell Lysates
- Western Blot Troubleshooting
- Western Blot Troubleshooting Guide
- View all Protocols, Troubleshooting, Illustrated assays and Webinars
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