Derivatives of isogenic stringent (relA+) and relaxed (relA) strains of Escherichia coli were compared in respect of rates of the dissociation of peptidyl-tRNA from ribosomes during protein synthesis. The derivatives both contained a mutant pth gene which rendered temperature-sensitive their peptidy
Codon recognition: The allosteric ribosome hypothesis
โ Scribed by Carl R. Woese
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- English
- Weight
- 332 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0022-5193
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โฆ Synopsis
It is possible that simple base pairing between codon and anticodon triplets is incapable of providing the accuracy required for the translation process. An auxiliary mechanism for increasing this accuracy is herein proposed, whereby the ribosome recognizes the codon, in response to which it assumes a particular configuration. The ribosomal configuration in turn controls which of the tRNA species are permitted access to any given codon. Evidence supporting the model and some of its predictions are discussed.
๐ SIMILAR VOLUMES
Peptidyl-tRNA dissociates from the ribosomes of Escherichia coli during protein biosynthesis. The ribosome editor hypothesis states that incorrect peptidyl-tRNAs dissociate preferentially. Editing would therefore prevent the completion of proteins containing misincorporated amino acids. We have isol