A novel lipid hydroperoxide-derived modification to arginine

Chem Res Toxicol. 2003 Dec;16(12):1598-605. doi: 10.1021/tx034178l.


The guanidine group present in the amino acid arginine was found to react with the lipid hydroperoxide-derived bifunctional electrophile, 4-oxo-2-nonenal. The reaction between N(alpha)-tert-butoxycarbony-l-arginine and 4-oxo-2-nonenal resulted in the formation of an adduct (adduct A) that subsequently dehydrated on heating to adduct B. Liquid chromatography/mass spectrometry and nuclear magnetic resonance spectroscopy were used to assign the structure of adduct B as (N(delta),N(omega)(')-etheno-2'-heptanon-2' '-one)-N(alpha)-t-Boc-arginine. The reaction proceeded from initial reaction of the primary N(omega)-amino group at the C-1 aldehyde of 4-oxo-2-nonenal. Subsequently, an intramolecular Michael addition of a secondary N(delta)-amino group occurring at C-3 resulted in formation of the cyclic carbinolamine adduct A. Dehydration and rearrangement of the exocyclic imine resulted in the formation of adduct B, which contained a stable imidazole ring. The tetra peptide LRDE reacted with 4-oxo-2-nonenal primarily at arginine rather than at the amino terminus. This suggests that arginine-containing proteins can react with lipid hydroperoxide-derived 4-oxo-2-nonenal to form a novel imidazole modification.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Aldehydes / chemistry
  • Arginine / analogs & derivatives*
  • Arginine / chemistry
  • Arginine / metabolism
  • Borohydrides / chemistry
  • Chromatography, Liquid / methods
  • Guanidine / chemistry
  • Lipid Peroxides / chemistry*
  • Mass Spectrometry / methods
  • Nuclear Magnetic Resonance, Biomolecular
  • Oligopeptides / chemistry
  • Oxidation-Reduction


  • 4-oxo-2-nonenal
  • Aldehydes
  • Borohydrides
  • Lipid Peroxides
  • Oligopeptides
  • sodium borohydride
  • Arginine
  • Guanidine