Amino Acids

, Volume 28, Issue 1, pp 77–83

Biochemical properties of new synthetic carnosine analogues containing the residue of 2,3-diaminopropionic acid: the effect of N-acetylation

  • I. Cacciatore
  • A. Cocco
  • M. Costa
  • M. Fontana
  • G. Lucente
  • L. Pecci
  • F. Pinnen
Article

DOI: 10.1007/s00726-004-0142-0

Cite this article as:
Cacciatore, I., Cocco, A., Costa, M. et al. Amino Acids (2005) 28: 77. doi:10.1007/s00726-004-0142-0

Summary.

Three novel carnosine analogues 79 containing the residue of L(+)2,3-diaminopropionic acid with different degree of N-acetylation instead of β-alanine have been synthesized and characterized. Comparative analysis of hydrolysis by carnosinase revealed that the mono- and bis-acetylated compounds 8 and 9 are resistant to enzymatic hydrolysis and act as competitive inhibitors of this enzyme. The hydroxyl radical scavenging potential of the three analogues was evaluated by their ability to inhibit iron/H2O2-induced degradation of deoxyribose. The second-order rate constants of the reaction of compounds 79 with hydroxyl radical were almost identical to that of carnosine. These compounds were also found to act as protective agents against peroxynitrite-dependent damage as assessed by their ability to prevent nitration of free tyrosine induced by this species.

Keywords: Carnosine – Scavengers – Peroxynitrite – Free radicals – Antioxidants – Peptidomimetics 

Copyright information

© Springer-Verlag/Wien 2005

Authors and Affiliations

  • I. Cacciatore
    • 1
  • A. Cocco
    • 1
  • M. Costa
    • 3
  • M. Fontana
    • 3
  • G. Lucente
    • 2
  • L. Pecci
    • 3
  • F. Pinnen
    • 1
  1. 1.Dipartimento di Scienze del FarmacoUniversità degli Studi “G. d’Annunzio”ChietiItaly
  2. 2.Dipartimento di Studi FarmaceuticiUniversità “La Sapienza”RomaItaly
  3. 3.Dipartimento di Scienze Biochimiche and Istituto di Biologia e Patologia Molecolari del CNRUniversità “La Sapienza”RomaItaly

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