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Control of ribosomal RNA synthesis in Escherichia coli

โœ Scribed by Muto, Akira

Publisher
Springer
Year
1977
Tongue
English
Weight
507 KB
Volume
152
Category
Article
ISSN
0026-8925

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โœฆ Synopsis

The ribosomal RNA synthesis in a cell-free system containing the nucleoids and the cytoplasmic fraction prepared from Escherichia coli cells has been investigated. The addition of the "4S" fraction from the cytoplasm to the isolated nucleoids induces RNA synthesis by a new chain initiation. In this system a preferential initiation or rRNA chains occurs. The experimental results suggest that the 4S fraction contains at least two activities, one for releasing RNA-polymerases from the nucleoids, and another for the frequent initiation of rRNA chains. No restriction of the rRNA synthesis has been observed in the nucleoids and the 4S fraction from the amino acid-starved rel+ cells. The rRNA synthesized in the above system is detected at about 23S and 16S rRNA regions.

๐Ÿ“œ SIMILAR VOLUMES

Control of ribosomal RNA synthesis in Es
Control of ribosomal RNA synthesis in Escherichia coli
โœ Muto, Akira ๐Ÿ“‚ Article ๐Ÿ“… 1978 ๐Ÿ› Springer ๐ŸŒ English โš– 566 KB

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The effect of amino acid-starvation on the transcription in vitro of overall RNA and ribosomal RNA was investigated using nucleoids prepared from the exponentially growing and the amino acid-starved cells of rel+ and rel- strains of Escherichia coli. In this system, the synthesis of RNA is exclusive

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The RNA synthesis in non-viscous lysates containing the intact folded chromosome and cytoplasm fractions prepared from Escherichia coli has been examined in vitro. The RNA synthesis not only by chain extension but also by new chain initiation occurs in this system. While the RNA synthesis by chain e