BCAR3 (Breast Cancer Anti-estrogen Resistance Protein 3, Novel SH2-containing Protein 2, SH2 Domain-containing Protein 3B, NSP2, SH2D3B, UNQ271/PRO308)

In breast cancer, the antiestrogen tamoxifen has been prescribed for both primary treatment and the treatment of advanced metastatic disease. Although the drug induces remission in most patients with estrogen receptor-positive disease, all patients eventually develop resistance. van Agthoven et al. (1998) applied an insertional mutagenesis strategy to a breast cancer cell line. Infected cells were subjected to tamoxifen selection, and the resistant clones were screened for a common integration site linked with antiestrogen resistance. By screening a human testis cDNA library with the integration site-specific probe, they obtained a cDNA encoding BCAR3 (breast cancer antiestrogen resistance 3). The deduced 825aa BCAR3 protein contains a putative Src homology 2 (SH2) domain and sequences homologous to yeast CDC48. Northern blot analysis detected abundant expression of a 3.4kb BCAR3 transcript in heart, placenta, skeletal muscle, spleen, prostate, testis, ovary, small intestine, colon, fetal kidney, and several cancer cell lines, but not in nonmalignant breast tissue; a 6kb BCAR3 transcript was also detected in skeletal muscle and heart.\n\nApplications:\nSuitable for use in ELISA and Western Blot. Other applications not tested.\n\nRecommended Dilution:\nELISA: 1:32,000\nWestern Blot: 0.5-2ug/ml\nOptimal dilutions to be determined by the researcher.\n\nStorage and Stability:\nMay be stored at 4 degrees C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20 degrees C. Aliquots are stable for at least 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.

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SPECIFICATIONS

Catalog Number

B0395-35C

Size

100ug

Applications

ELISA, WB

Hosts

Goat

Reactivities

Hum, Mouse, Bov, Can, Prc

Form

Supplied as a liquid in Tris saline, 0.02% sodium azide, pH 7.3, 0.5% BSA.

P Type

Pab

Purity

Purified by immunoaffinity chromatography.

References

1. van Agthoven T, van Agthoven TL, Dekker A, van der Spek PJ, Vreede L, Dorssers LC. Identification of BCAR3 by a random search for genes involved in antiestrogen resistance of human breast cancer cells.\nEMBO J. 1998 May 15;17(10):2799-808.

Additional Info

Recognizes mouse BCAR3. Species sequence homology: Bovine, canine, human and porcine.