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Transcriptional effects of polyamines on ribosomal proteins and on polyamine-synthesizing enzymes in Escherichia coli.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Huang, Sui |
| Copyright Year | 1990 |
| Abstract | We find that the transcription of various ribosomal proteins can be differentially affected by polyamines and by changes in growth rates. Using strain MG1655 of Escherichia coli K-12 (F-, lambda-), we have determined the effects of polyamines and changes in growth rate on the transcription of several ribosomal genes and the polyamine-synthesizing enzymes ornithine decarboxylase (L-ornithine carboxy-lyase; EC 4.1.1.17) and arginine decarboxylase (L-arginine carboxylyase; EC 4.1.1.19). Ribosomal proteins S20 and L34 can be differentiated from the other ribosomal proteins studied; the transcription of S20 and L34 is especially sensitive to polyamines and less sensitive to changes in growth rates. In contrast, the transcription of S10, S15, S19, L2, L4, L20, L22, and L23 is insensitive to polyamines although it is particularly sensitive to changes in growth rates. Like S20 and L34, the transcription of ornithine decarboxylase and arginine decarboxylase is especially sensitive to polyamines. Polyamines specifically enhance the transcription of ribosomal proteins S20 and L34, and decrease that of ornithine decarboxylase and arginine decarboxylase. It is evident that polyamines can exert both positive and negative regulation of gene expression in E. coli that can be differentiated from the effects caused by changes in growth rates. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.pnas.org/content/87/9/3464.full.pdf |
| PubMed reference number | 2185470v1 |
| Volume Number | 87 |
| Issue Number | 9 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Arginine decarboxylase Carboxy-Lyases Carboxyl Group L-Epicatechin Lyase Ornithine Decarboxylase Ornithine carbamoyltransferase deficiency Polyamines Ribosomal Proteins physical hard work |
| Content Type | Text |
| Resource Type | Article |
