DNA polymerase I activity in Escherichia coli is influenced by spot 42 RNA.
AUTOR(ES)
Polayes, D A
RESUMO
We have shown that the level of DNA polymerase I (Pol I) activity in Escherichia coli is influenced by the level of a 109-nucleotide RNA, spot 42 RNA. Deletion of the gene for spot 42 RNA results in a 20 to 25% decrease in Pol I activity, as assayed by nucleotide incorporation in cell extracts and a decrease in the ability of cells to grow in the presence of the DNA-alkylating agent methyl methanesulfonate. Also, a physiological reduction of the level of spot 42 RNA, by growth in media containing poor carbon sources, results in a corresponding decrease in Pol I activity. Conversely, overproduction of spot 42 RNA results in a 10 to 15% increase in Pol I activity in vitro. Thus, changes in the amount of spot 42 RNA result in relatively small but significant changes in Pol I activity.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=211090Documentos Relacionados
- Spot 42 RNA of Escherichia coli is not an mRNA.
- Transcription termination at the Escherichia coli thra terminator by spinach chloroplast RNA polymerase in vitro is influenced by downstream DNA sequences.
- Transcription of BK virus DNA by Escherichia coli RNA polymerase: size and sequence analysis of RNA.
- Deletion of the spf (spot 42 RNA) gene of Escherichia coli.
- Reverse Transcription by Escherichia coli DNA Polymerase I