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Suppression and the code: Beyond codons and anticodons

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Summary

Specificity and accuracy in the decoding of genetic information during mRNA-programmed, ribosome-dependent polypeptide synthesis (translation) involves more than just hydrogen bonding between two anti-parallel trinucleotides, the mRNA codon and the tRNA anticodon. Other macromolecules are also involved, and translational suppression has been and continues to be an appropriate and effective way to identify them, as well as other parts of mRNA and tRNA, and to elucidate the structural determinants of their functions and interactions. Experimental results are presented that bear upon codon context effects, the role of tRNA structural features in aminoacyl-tRNA selection and in codon selection (reading-frame maintenance), determinants of tRNA identity, elongation factor suppressor mutants, and termination codon recognition by the ribosomal RNA of the small subunit. The examples presented illustrate the complexity of the decoding process and the interconnectedness of translational macromolecules in achieving specificity and accuracy in polypeptide synthesis.

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  1. Department of Molecular Genetics, The University of Texas, M. D. Anderson Cancer Center, 1515 Holcombe Boulevard, 77030, Houston, Texas, USA

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Murgola, E.J. Suppression and the code: Beyond codons and anticodons. Experientia 46, 1134–1141 (1990). https://doi.org/10.1007/BF01936923

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