Catalog # CM0371

CD46 (Extracellular region) Antibody

Mouse Monoclonal

Application / Dilution
ELISA (Cap)1:100

Size 100 μl

Species Reactivity Hu

MW 45-60 kDa

Isotype IgG2b



CD46 is a complement regulatory protein that is also called membrane cofactor protein. This protein is a type 1 membrane protein that plays an important inhibitory role in the complement system. CD46 exhibits a cofactor activity that promotes inactivation of C3b and C4b by serum factor 1, thereby protecting host cells from complement-dependent cytotoxicity. CD46 can also function as a receptor for selected bacteria and viruses, and is reportedly required for proper fusion of spermatozoa to the oocyte membrane during fertilization. CD46 is overexpressed in medulloblastoma tumors, and CD46 expression has been linked with poor prognosis in breast cancer. The upregulation of CD46 may protect cancer cells from complement-dependent cytotoxicity to facilitate cancer cell immune evasion.

Liszewski, M.K. et al. (1991) Annu Rev Immunol. 9:431.
Yamamoto H et al. (2013) Int J Biochem Cell Bio 45(12):2808.

Western blot of native lysates from NCI-H2052 mesothelial cells (lane 1), SK-MES-1 squamous carcinoma (lane 2), MDA-MB-231 breast carcinoma (lane 3), MeWo melanoma (lane 4), A431 skin adenocarcinoma (lane 5), LNCaP prostate cancer cells (lane 6), and MCF7 breast cancer cells (lane 7). The blot was probed with mouse monoclonal anti-CD46 (CM0371) at 1:1000.

Immunocytochemical labeling of CD46 in aldehyde fixed human NCIH1915 lung carcinoma cells. The cells were labeled with mouse monoclonal anti-CD46 (CM0371). The antibody was detected using goat anti-mouse Ig:DyLight® 594.

Representative Standard Curve using mouse monoclonal anti-CD46 (CM0371) for ELISA capture of human recombinant CD46 extracellular region with a His-tag. Captured protein was detected by suitable anti-His-tag antibody followed by appropriate secondary antibody HRP conjugate.

Clone (M037) was generated from a proprietary antigen related to native human CD46 expressed in NCI-H1915 lung cancer cell line.

*For more information, see UniProt Accession P15529
Mouse monoclonal, protein G purified antibody is supplied in 100µl phosphate-buffered saline, 50% glycerol, 1 mg/ml BSA, and 0.05% sodium azide. Store at -20°C. Stable for 1 year.

The products are are safely shipped at ambient temperature for both domestic and international shipments. Each product is guaranteed to match the specifications as indicated on the corresponding technical data sheet. Please store at -20C upon arrival for long term storage.

Clone M037 mouse monoclonal antibody detects a 45-60 kDa* protein on SDS-PAGE "Native" immunoblots of human A549, MeWo, MDA-MB-231, and MCF7 cells, as well as human lung tissues. This antibody weakly detects denatured CD46. The antibody works for western blot, immunoprecipitation, ELISA capture, and immunocytochemistry.

*All molecular weights (MW) are confirmed by comparison to Bio-Rad Rainbow Markers and to western blot mobilities of known proteins with similar MW.

This kit contains: