Expression of simian virus 40 large T antigen in Escherichia coli using vectors based on the regulatable rac promoter

J. M. Pistillo, J. K. Vishwanatha

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Simian Virus 40 large T antigen is a multi-functional protein that is involved in the initiation of viral DNA replication, regulation of viral transcription and cell transformation. Bacterial expression vectors, pER23-1 and pER23-2, that are based on the regulatable rac promoter were used to produce T antigen either as a free protein or as a fusion protein. We have observed efficient transcription of the cloned T antigen gene in most of the recombinants. However, expression of the T antigen protein was inefficient and most of the expressed protein was truncated. This may be due to differences in codon usage in E. coli or to rapid protein degradation.

Original languageEnglish
Pages (from-to)1129-1137
Number of pages9
JournalBiochemical and Biophysical Research Communications
Issue number3
Publication statusPublished - 29 Jun 1990


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