Abstract:
:To analyze the proposed growth-inhibitory function of wild-type p53, we compared simian virus 40 (SV40) DNA replication in primary rhesus monkey kidney (PRK) cells, which express wild-type p53, and in the established rhesus monkey kidney cell line LLC-MK2, which expresses a mutated p53 that does not complex with large T antigen. SV40 DNA replication proceeded identically in both cell types during the course of infection. Endogenously expressed wild-type p53 thus does not negatively modulate SV40 DNA replication in vivo. We suggest that inhibition of SV40 DNA replication by wild-type p53 in in vitro replication assays is due to grossly elevated ratios of p53 to large T antigen, thus depleting the replication-competent free large T antigen in the assay mixtures by complex formation. In contrast, the ratio of p53 to large T antigen in in vivo replication is low, leaving the majority of large T antigen in a free, replication-competent state.
journal_name
J Viroljournal_title
Journal of virologyauthors
von der Weth A,Deppert Wdoi
10.1128/JVI.67.2.886-893.1993subject
Has Abstractpub_date
1993-02-01 00:00:00pages
886-93issue
2eissn
0022-538Xissn
1098-5514journal_volume
67pub_type
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pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Journal of virology
pub_type: 杂志文章
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