Anti-ASPP1 (RABBIT) Antibody - - 100 µg

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.