Transcriptional regulation by p53: Functional interactions among multiple regulatory domains

Yu Shen Hsu, Fen Mei Tang, Wei Li Liu, Jing Yuan Chuang, Ming Yang Lai, Young Sun Lin

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


The tumor suppressor p53 protein possesses activities typical of eukaryotic transcriptional activators; p53 binds to specific DNA sequences and stimulates transcription of the target genes. By a series of deletion and domain-swapping studies, we report here that (i) p53 has two auxiliary domains, which have little effect on the DNA binding activity of its core domain but are capable of modulating its transactivation activity in a target site-dependent manner; (ii) p53 contains two cellspecific transcriptional inhibitory domains, I1 and I2, which are active in Saos-2 and HeLa cells but not in HepG2 and Hep3B cells; and (iii) I1 inhibits the activity of several structurally different activating regions. These results demonstrate that the apparent transcriptional activity of p53 is determined by collaborations among its regulatory domains, its target sites, and the cellular environment.

Original languageEnglish (US)
Pages (from-to)6966-6974
Number of pages9
JournalJournal of Biological Chemistry
Issue number12
StatePublished - Mar 24 1995
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology


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