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Microbiology and Molecular Biology Reviews, September 2007, p. 477-494, Vol. 71, No. 3
1092-2172/07/$08.00+0     doi:10.1128/MMBR.00013-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Ribosome Biogenesis and the Translation Process in Escherichia coli

Magdalena Kaczanowska and Monica Rydén-Aulin*

Department of Genetics, Microbiology, and Toxicology, Stockholm University, Stockholm, Sweden

Summary: Translation, the decoding of mRNA into protein, is the third and final element of the central dogma. The ribosome, a nucleoprotein particle, is responsible and essential for this process. The bacterial ribosome consists of three rRNA molecules and approximately 55 proteins, components that are put together in an intricate and tightly regulated way. When finally matured, the quality of the particle, as well as the amount of active ribosomes, must be checked. The focus of this review is ribosome biogenesis in Escherichia coli and its cross-talk with the ongoing protein synthesis. We discuss how the ribosomal components are produced and how their synthesis is regulated according to growth rate and the nutritional contents of the medium. We also present the many accessory factors important for the correct assembly process, the list of which has grown substantially during the last few years, even though the precise mechanisms and roles of most of the proteins are not understood.

* Corresponding author. Mailing address: Department of Genetics, Microbiology, and Toxicology, Stockholm University, S-10691 Stockholm, Sweden. Phone: 46 8 164154. Fax: 46 8 6129552. E-mail: monica{at}gmt.su.se

Microbiology and Molecular Biology Reviews, September 2007, p. 477-494, Vol. 71, No. 3
1092-2172/07/$08.00+0     doi:10.1128/MMBR.00013-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



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