S-Adenosylmethionine-dependent radical-based modification of biological macromolecules

Curr Opin Struct Biol. 2010 Dec;20(6):684-92. doi: 10.1016/j.sbi.2010.09.009. Epub 2010 Oct 14.


Proteins and RNA molecules enjoy a variety of chemically complex post-translational and post-transcriptional modifications. The chemistry at work in these reactions, which was considered to be exclusively ionic in nature has recently been shown to depend on radical mechanisms in some cases. The overwhelming majority of these radical-based reactions are catalyzed by 'Radical-SAM' enzymes. This review article highlights mechanistic and structural aspects of this class of reactions and indicates important research directions to be addressed.

Publication types

  • Review

MeSH terms

  • Amino Acid Sequence
  • Enzymes / chemistry
  • Enzymes / metabolism*
  • Free Radicals / metabolism*
  • Humans
  • Proteins / chemistry
  • Proteins / metabolism*
  • RNA / chemistry
  • RNA / metabolism*
  • S-Adenosylmethionine / metabolism*


  • Enzymes
  • Free Radicals
  • Proteins
  • RNA
  • S-Adenosylmethionine