Tumor Protein P53 Binding Protein 2 (TP53BP2) antibody

Antigen: Tumor Protein P53 Binding Protein 2 (TP53BP2)

Synonyms: BBP, 53BP2, ASPP2, 53BP2S, p53BP2, PPP1R13A, TP53BP2

Clonality: Polyclonal

Host: Rabbit

Reactivity: Mouse (Murine), Human, Rat (Rattus)

Application: Immunohistochemistry (IHC), ELISA, Western Blotting (WB), Immunoprecipitation (IP)

Catalog no.: ABIN233802

Additional Information

Alternative name: ASPP2

Gene ID: NP_001026855

Swiss-Prot: Q13625

Immunogen: This affinity purified antibody was prepared from whole rabbit serum produced by repeated immunizations with a synthetic peptide corresponding to an internal sequence of human ASPP2.

Format: Liquid (sterile filtered)

Description: ASPP (ankyrin-repeat-, SH3-domain- proline-rich-region protein) proteins (ASPP1, ASPP2 and iASPP) represent a new family of p53 binding proteins. ASPP1 and ASPP2 bind and enhance p53-mediated apoptosis. In contrast, iASPP functionally inactivates p53. ASPPs may also regulate p63- and p73-mediated apoptosis. Both ASPP1 and 2 directly interact with p53 and specifically enhance the apoptotic function of p53 by stimulating its DNA binding and transactivation function on promoters of pro-apoptotic genes, such as Bax and PIG-3. Not all cell cycle arrest genes are affected, such as p21. Interestingly, expression of ASPP is frequently down-regulated in human breast carcinomas expressing wild-type p53 but not mutant p53. Therefore, ASPP might regulate the tumor suppression function of p53 in vivo.

Specificity: This Protein A purified antibody is directed against human ASPP2. The product was purified from monospecific antiserum by Protein A affinity chromatography. Minimal reactivity occurs against ASPP1. A BLAST analysis was used to suggest cross-reactivity with ASPP2 from macaque and dog sources based on a 100% homology with the immunizing sequence. Expect partial reactivity with ASPP2 from mouse and rat sources based on an 80% homology with the immunizing sequence. Reactivity against homologues from other sources is not known.

Application Details

Application Notes: Recommended Dilutions: ELISA 1:2,500 - 1:10,000 WESTERN BLOT 1:500 - 1:3,000 IMMUNOHISTOCHEMISTRY User Optimized OTHER APPLICATIONS User Optimized 1 2 3 M. Note: This affinity purified antibody has been tested for use in ELISA and western blotting. Specific conditions for reactivity should be optimized by the end user. Expect a band approximately 125 kDa in size corresponding to ASPP2 by western blotting in the appropriate cell lysate or extract.

Concentration: 2.4 mg/ml (by UV absorbance at 280 nm)

Buffer: Stabilizer: None. Preservative: 0.01% (w/v) Sodium Azide. Buffer: 0.02 M Potassium Phosphate, 0.15 M Sodium Chloride, pH 7.2.

Storage: Store vial at -20° C or below prior to opening. For extended storage, aliquot contents and freeze at -20° C or below. Avoid cycles of freezing and thawing. Dilute only prior to immediate use. Expiration date is one (1) year from date of opening product.

Restrictions: For Research Use only

Images

Western blot using antibodies-online's Protein A purified anti-ASPP2 to detect over-expressed ASPP2 in MCF-7 cells (Lane 2, arrowhead). Lane 1 is a nontransfected control. Lane 3 is MCF-7 cells over-expressing ASPP1. Cell extracts were electrophoresed and transferred to nitrocellulose. The membrane was probed with the primary antibody at a 1:1,000 dilution. The identity of the lower MW band at approximately 40kDa is unknown. Personal Communication, H. Yang, Univ. Oklahoma, Oklahoma City, OK.