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Primate's p53 inhibits SV40 DNA replication in vitro.
N Miyamoto1, E Kihara, T Inada
1Tsukuba Life Sci. Center, Inst. of Phys. and Chem. Res., Ibaraki, Japan.
Biochemical and Biophysical Research Communications
|April 30, 1990
Summary
Primate p53, previously thought to not affect simian virus 40 (SV40) DNA replication, actually inhibits it. This suggests p53
Area of Science:
- Molecular Biology
- Virology
- Genetics
Background:
- Previous studies suggested rodent p53 inhibits simian virus 40 (SV40) DNA replication, but primate p53 does not.
- This species-specific difference was thought to influence SV40 replication patterns.
Purpose of the Study:
- To investigate the role of primate p53 in SV40 DNA replication.
- To determine if primate p53 also inhibits SV40 DNA replication in vitro.
Main Methods:
- Purification of the p53-SV40 large tumor antigen (T antigen) complex from SV40-infected COS-1 cells.
- In vitro assays to assess the replication activity and inhibitory effects of the purified complex on SV40 DNA replication.
Main Results:
- The purified p53-SV40 T antigen complex exhibited low replication activity.
- This complex demonstrated significant inhibition of SV40 DNA replication in vitro.
Conclusions:
- Primate p53 actively inhibits SV40 DNA replication in vitro.
- The inhibitory effect of p53 on SV40 DNA replication is a general property of the protein, not species-specific.
- This finding re-evaluates the species-specific replication of SV40 DNA.