Critical roles for a genetic code alteration in the evolution of the genus Candida

Raquel M. Silva, João A. Paredes, Gabriela R. Moura, Bruno Manadas, Tatiana Lima-Costa, Rita Rocha, Isabel Miranda, Ana C. Gomes, Marian J.G. Koerkamp, Michel Perrot, Frank C.P. Holstege, Hélian Boucherie, Manuel A. S. Santos*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


During the last 30 years, several alterations to the standard genetic code have been discovered in various bacterial and eukaryotic species. Sense and nonsense codons have been reassigned or reprogrammed to expand the genetic code to selenocysteine and pyrrolysine. These discoveries highlight unexpected flexibility in the genetic code, but do not elucidate how the organisms survived the proteome chaos generated by codon identity redefinition. In order to shed new light on this question, we have reconstructed a Candida genetic code alteration in Saccharomyces cerevisiae and used a combination of DNA microarrays, proteomics and genetics approaches to evaluate its impact on gene expression, adaptation and sexual reproduction. This genetic manipulation blocked mating, locked yeast in a diploid state, remodelled gene expression and created stress cross-protection that generated adaptive advantages under environmental challenging conditions. This study highlights unanticipated roles for codon identity redefinition during the evolution of the genus Candida, and strongly suggests that genetic code alterations create genetic barriers that speed up speciation.
Original languageEnglish
Pages (from-to)4555-4565
Number of pages11
JournalEMBO Journal
Issue number21
Publication statusPublished - 31 Oct 2007
Externally publishedYes


  • Candida
  • Gene expression
  • Genetic code alterations
  • mRNA mistranslation
  • tRNA


Dive into the research topics of 'Critical roles for a genetic code alteration in the evolution of the genus Candida'. Together they form a unique fingerprint.

Cite this