CDCP1 (CUB-domain-containing protein 1) contains three extracellular CUB domains, a transmembrane domain, and two putative cytoplasmic tyrosine phosphorylation sites. Phosphorylation of the gp140 and p80 proteins is mediated by Src family kinases at various tyrosine residues, including Tyr 734. PTP family members mediate the desphosphorylation of CDCP1. The conversion of gp140 to p80 prolongs the phosphorylation state, which may affect signaling in epithelial wounds. CDCP1 acts as a marker for hematopoetic cells and also exhibits high expression in metastatic colon and breast tumors.
Background References
1. Khan T et al. CUB Domain-Containing Protein 1 (CDCP1) is a rational target for the development of imaging tracers and antibody-drug conjugates for cancer detection and therapy. Theranostics. 2022 Oct
2. Huang H et al. Targeting CDCP1 boost CD8+ T cells-mediated cytotoxicity in cervical cancer via the JAK/STAT signaling pathway. J Immunother Cancer. 2024 Oct
Western blot analysis of CDCP1 on different lysates with Rabbit anti-CDCP1 antibody (HA724639) at 1/5,000 dilution.
Lane 1: HCT 116 (Human colon cancer cell) cell lysate (15 µg/Lane)
Lane 2: HT-29 (Human colorectal adenocarcinoma cell) cell lysate (15 µg/Lane)
Lane 3: COLO205 (Human colon adenocarcinoma cell) cell lysate (15 µg/Lane)
Lane 4: MDA-MB-231 (Human breast cancer cell) cell lysate (15 µg/Lane)
Lane 5: MCF7 (Human breast cancer cell) cell lysate (15 µg/Lane)
Lane 6: Mouse colon tissue lysate (20 µg/Lane)
Lane 7: Mouse small intestine tissue lysate (20 µg/Lane)
Lane 8: Rat colon tissue lysate (20 µg/Lane)
Lane 9: Rat small intestine tissue lysate (20 µg/Lane)
Blocking: 5% NFDM/TBST, 1 hour at room temperature
Primary antibody: HA724639, 1/5,000 in primary antibody dilution buffer (K1803), overnight at 4 °C
Secondary antibody: Goat anti-Rabbit IgG-HRP (HA1001), 1/50,000 in 5% NFDM/TBST, 1 hour at room temperature
Predicted band size: 92.9 kDa
Observed band size: 140, 70 kDa
The molecular weight is consistent with the reference (PMID: 20551327).
Application: Immunohistochemistry (IHC-P)
Species: Human
Tissue: Breast cancer
Sample: Paraffin-embedded section