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Related Experiment Videos

Mouse p53 inhibits SV40 origin-dependent DNA replication.

A W Braithwaite1, H W Sturzbecher, C Addison

  • 1Marie Curie Research Institute, Surrey, UK.

Nature
|October 1, 1987
PubMed
Summary
This summary is machine-generated.

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The tumor suppressor protein p53, when expressed in monkey cells, significantly inhibits simian virus 40 (SV40) DNA replication. This finding suggests p53 plays a direct role in regulating DNA synthesis initiation and maintenance.

Area of Science:

  • Molecular Biology
  • Virology
  • Cell Biology

Background:

  • p53 is a phosphoprotein elevated in transformed cells.
  • p53 is implicated in cell cycle control, particularly at the G0-G1 phase.
  • p53 forms complexes with SV40 large-T antigen.

Purpose of the Study:

  • To investigate the in vivo effects of expressing wild-type and mutant p53 proteins from different species in SV40-transformed monkey cells.
  • To determine if p53 influences SV40 DNA replication.

Main Methods:

  • Expression of mouse p53 in SV40-transformed monkey cells.
  • Assessing SV40 origin-dependent DNA replication.
  • Analysis of p53 interactions with SV40 large-T antigen.

Main Results:

Related Experiment Videos

  • Expression of mouse p53 substantially and selectively inhibited SV40 origin-dependent DNA replication.
  • p53's inhibitory effect on DNA replication was observed in vivo.
  • Data suggest p53 may directly impact the initiation or maintenance of replicative DNA synthesis.

Conclusions:

  • p53 can directly inhibit SV40 DNA replication.
  • Beyond its role in cell cycle control, p53 appears to regulate DNA synthesis.
  • These findings contribute to understanding p53's function in viral DNA replication and cellular processes.