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Suppression

  • Deborah A. Steege
  • Dieter G. Söll
Part of the Biological Regulation and Development book series (BRD, volume 1)

Abstract

Suppression is the genetic term used to describe the effect of a general class of secondary mutations that restore a wild or pseudo-wild type phenotype to a mutant organism in which the primary mutation is still maintained. The isolation of a suppressor serves to identify a compensating mutation in the second of a pair of genes which may encode macromolecules interacting at some point in viral or cell metabolism. Since the molecular mechanism by which a wild type phenotype appears usually is not prescribed by the genetic selection imposed, one would predict that biochemical alterations of many different types could correct a given deficiency. In fact, evidence accumulated since the first report of suppression in 1927 (Bonnier, 1927) clearly shows that correction mechanisms operate both during the transcription and translation steps of gene expression, and also at the level of the final gene products. The many types of genetic suppression were enumerated several years ago in the comprehensive article of Hartman and Roth (1973). The experimental evidence which has identified the molecular basis for nonsense suppression (Garen, 1968; Körner et al, 1978), missense suppression (Hill, 1975), frameshift suppression (Roth, 1974), and ribosomal suppression (Gorini, 1970, 1974) has been discussed. Hawthorne and Leupold (1974) have recently summarized our knowledge of genetic suppression in yeast. These remain excellent discussions of the basic principles for the class of suppressor mutations, termed informational suppressors, that affects the macromolecular components of the transcription and translation processes.

Keywords

Anticodon Loop Nonsense Suppression Nonsense Codon tRNA Species tRNA Anticodon 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1979

Authors and Affiliations

  • Deborah A. Steege
    • 1
  • Dieter G. Söll
    • 2
  1. 1.Department of BiochemistryDuke University Medical CenterDurhamUSA
  2. 2.Department of Molecular Biophysics and BiochemistryYale UniversityNew HavenUSA

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