Cookies on this website

We use cookies to ensure that we give you the best experience on our website. If you click 'Accept all cookies' we'll assume that you are happy to receive all cookies and you won't see this message again. If you click 'Reject all non-essential cookies' only necessary cookies providing core functionality such as security, network management, and accessibility will be enabled. Click 'Find out more' for information on how to change your cookie settings.

We identified a family of proteins termed ASPP. ASPP1 is a protein homologous to 53BP2, the C-terminal half of ASPP2. ASPP proteins interact with p53 and specifically enhance p53-induced apoptosis but not cell cycle arrest. Inhibition of endogenous ASPP function suppresses the apoptotic function of endogenous p53 in response to apoptotic stimuli. ASPP enhance the DNA binding and transactivation function of p53 on the promoters of proapoptotic genes in vivo. Two tumor-derived p53 mutants with reduced apoptotic function were defective in cooperating with ASPP in apoptosis induction. The expression of ASPP is frequently downregulated in human breast carcinomas expressing wild-type p53 but not mutant p53. Therefore, ASPP regulate the tumor suppression function of p53 in vivo.

Original publication

DOI

10.1016/s1097-2765(01)00367-7

Type

Journal article

Journal

Mol Cell

Publication Date

10/2001

Volume

8

Pages

781 - 794

Keywords

Apoptosis, Apoptosis Regulatory Proteins, Breast Neoplasms, Carcinoma, Carrier Proteins, Cell Separation, Cyclin-Dependent Kinase Inhibitor p21, Cyclins, Female, Flow Cytometry, Humans, Microscopy, Fluorescence, Molecular Sequence Data, Peptide Fragments, Promoter Regions, Genetic, Protein Structure, Tertiary, Proto-Oncogene Proteins, Proto-Oncogene Proteins c-bcl-2, Transcriptional Activation, Tumor Cells, Cultured, Tumor Suppressor Protein p53, bcl-2-Associated X Protein