Laccase-catalyzed polymerization of tyrosine-containing peptides

Maija Liisa Mattinen*, Kristiina Kruus, Johanna Buchert, Jacob H. Nielsen, Henrik J. Andersen, Charlotte L. Steffensen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

108 Citations (Scopus)


Laccase-catalyzed polymerization of tyrosine and tyrosine-containing peptides was studied in the presence and absence of ferulic acid (FA). Advanced spectroscopic methods such as MALDI-TOF MS, EPR, FTIR microscopy and HPLC-fluorescence, as well as more conventional analytical tools: oxygen consumption measurements and SDS/PAGE were used in the reaction mechanism studies. Laccase was found to oxidize tyrosine and tyrosine-containing peptides, with consequent polymerization of the compounds. The covalent linkage connecting the compounds was found to be an ether bond. Only small amounts of dityrosine bonds were detected in the polymers. When FA was added to the reaction mixtures, it was found to be incorporated into the polymer structure. Thus, in addition to homopolymers, different heteropolymers containing two or four FA residues were formed in the reactions.

Original languageEnglish
Pages (from-to)3640-3650
Number of pages11
Issue number14
Publication statusPublished - 1 Jul 2005
MoE publication typeA1 Journal article-refereed


  • Cross-linking
  • Ferulic acid
  • Laccase
  • Peptide
  • Tyrosine


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