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Email: info@nsjbio.com
- Tel: 858.663.9055
- Email: info@nsjbio.com
PTPRE antibody detects Protein tyrosine phosphatase epsilon, a cytoplasmic and membrane-associated enzyme encoded by the PTPRE gene on chromosome 10q26.2. PTPRE belongs to the protein tyrosine phosphatase (PTP) family and functions as a key regulator of cell signaling by dephosphorylating tyrosine residues on target proteins. The enzyme exists in two major isoforms: a receptor-type (RPTP-epsilon) anchored to the plasma membrane and a cytoplasmic form (cyt-PTP-epsilon) expressed in hematopoietic and neural tissues. PTPRE is highly expressed in brain, bone, and immune cells, where it regulates cell adhesion, differentiation, and electrical signaling.
Functionally, PTPRE negatively regulates receptor tyrosine kinase signaling pathways, including EGFR, PDGFR, and insulin receptor signaling. By dephosphorylating these kinases and associated adaptor proteins, it modulates cellular responses to growth factors and cytokines. PTPRE also participates in the regulation of voltage-gated potassium channels, influencing neuronal excitability and osteoclast function. Co-localization studies show PTPRE interacting with Kv2.1 channels and integrin complexes at the plasma membrane.
Structurally, PTPRE contains a catalytic phosphatase domain with the conserved HCXGR motif responsible for substrate dephosphorylation and a regulatory domain that mediates dimerization and subcellular targeting. The receptor isoform features an extracellular region, a single transmembrane helix, and two intracellular catalytic domains, whereas the cytoplasmic variant lacks the transmembrane segment. PTPRE is classified within the receptor-type PTP family, which includes PTPRA and PTPRJ, sharing high sequence and structural similarity.
PTPRE is essential in regulating bone resorption, neuronal signaling, and immune cell activation. In osteoclasts, it modulates integrin-mediated cytoskeletal organization and bone matrix degradation. In neurons, PTPRE fine-tunes ion channel phosphorylation, controlling electrical activity. It is also involved in macrophage and mast cell activation through modulation of Src family kinases. Known substrates include the EGF receptor, p130Cas, and voltage-gated potassium channels, linking PTPRE to multiple signaling pathways including MAPK and PI3K-AKT.
Dysregulation of PTPRE expression contributes to pathological conditions such as osteoporosis, cancer, and autoimmune disorders. Overexpression has been observed in breast cancer, where it enhances oncogenic signaling and invasion, while loss of function leads to impaired osteoclast activity and bone remodeling defects. Pathway associations include dephosphorylation signaling, Rho GTPase regulation, and integrin signaling networks. Developmentally, PTPRE is expressed in neural crest and mesenchymal cells, supporting differentiation and migration during embryogenesis.
Immunohistochemical staining using PTPRE antibody shows membrane and cytoplasmic localization in neurons, osteoclasts, and epithelial cells. The PTPRE antibody from NSJ Bioreagents is a valuable reagent for research in phosphatase signaling, neural electrophysiology, and bone metabolism.
Optimal dilution of the PTPRE antibody should be determined by the researcher.
E.coli-derived human PTPRE recombinant protein (Position: Q74-H591) was used as the immunogen for the PTPRE antibody.
After reconstitution, the PTPRE antibody can be stored for up to one month at 4oC. For long-term, aliquot and store at -20oC. Avoid repeated freezing and thawing.
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