Tyrosine specific sequential labeling of proteins

Gergely B. Cserép, András Herner, Otto S. Wolfbeis, Péter Kele

Research output: Contribution to journalArticle

11 Citations (Scopus)


We report (a) on the synthesis of a long-wavelength fluorescent coumarin containing an allyloxy acetate moiety, (b) the synthesis of two linkers containing an allyloxy acetate and an alkyne or azide function, respectively, and (c) the selective modification human serum albumin by a sequential method involving Pd(II) catalyzed modification of the phenolic side chain of tyrosine residues with an alkyne bearing linker and a subsequent azide-alkyne click reaction with an azide functionalized long-wavelength emitting coumarin dye. The method is likely to be applicable to various kinds of azido-modified fluorophores, and the Pd(II)-catalyzed modification of the tyrosines may also be used to introduce other kinds of tags. With these reagents, tyrosine specific modulation of proteins and peptides becomes possible either directly or in a sequential manner.

Original languageEnglish
Pages (from-to)5776-5778
Number of pages3
JournalBioorganic and Medicinal Chemistry Letters
Issue number21
Publication statusPublished - Nov 1 2013



  • Bioorthogonal chemistry
  • Chemical reporter
  • Click chemistry
  • Sequential labeling
  • Tyrosine tagging

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Medicine
  • Molecular Biology
  • Pharmaceutical Science
  • Drug Discovery
  • Clinical Biochemistry
  • Organic Chemistry

Cite this