Journal of Molecular Evolution

, Volume 64, Issue 1, pp 15–32

Molecular Evolution of Peptide Methionine Sulfoxide Reductases (MsrA and MsrB): On the Early Development of a Mechanism That Protects Against Oxidative Damage


  • Luis Delaye
    • Facultad de CienciasUNAM
  • Arturo Becerra
    • Facultad de CienciasUNAM
  • Leslie Orgel
    • Salk Institute
    • Facultad de CienciasUNAM

DOI: 10.1007/s00239-005-0281-2

Cite this article as:
Delaye, L., Becerra, A., Orgel, L. et al. J Mol Evol (2007) 64: 15. doi:10.1007/s00239-005-0281-2


Methionine sulfoxide reductases, enzymes that reverse the oxidation of methionine residues, have been described in a wide range of species. The reduction of the diastereoisomers of oxidized methionine is catalyzed by two different monomeric methionine sulfoxide reductases (MsrA and MsrB) and is best understood as an evolutionary response to high levels of oxygen either in the Earth’s atmosphere or possibly in more localized environments. Phylogenetic analyses of these proteins suggest that their distribution is the outcome of a complex history including many paralogy and lateral gene transfer events.


Methionine sulfoxide reductasesLateral gene transferMethionine oxidation

Supplementary material

supp.pdf (386 kb)
Supplementary material

Copyright information

© Springer Science+Business Media, Inc. 2006