Abstract:
:p73 and p63 are two recently discovered p53 homologs. Like p53, these proteins can recognize canonical p53 DNA-binding sites and, when overproduced, can activate p53-responsive target genes and induce apoptosis. Unlike p53, these genes undergo complex alternative splicing which, at least in the case of p63, yields proteins with widely divergent biological properties. In addition p73 and p63 are, in contrast to p53, rarely mutated in human cancer. Furthermore, p73 inactivation is not required for viral transformation. Thus, there is currently no firm evidence that p63 and p73 should be considered tumor suppressors. The early suggestion that monoallelic expression of p73 contributed to carcinogenesis needs to be interpreted cautiously in light of data showing interindividual and intraindividual variation with respect to monoallelic expression of p73 and the finding that p73 mRNA levels are generally increased, rather than decreased, in a host of tumors relative to normal cells.
journal_name
Oncogenejournal_title
Oncogeneauthors
Kaelin WG Jrdoi
10.1038/sj.onc.1202955subject
Has Abstractpub_date
1999-12-13 00:00:00pages
7701-5issue
53eissn
0950-9232issn
1476-5594journal_volume
18pub_type
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