Premium
Bistetrazine‐Cyanines as Double‐Clicking Fluorogenic Two‐Point Binder or Crosslinker Probes
Author(s) -
Kormos Attila,
Koehler Christine,
Fodor Eszter A.,
Rutkai Zsófia R.,
Martin Madison E.,
Mező Gábor,
Lemke Edward A.,
Kele Péter
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201800910
Subject(s) - bioorthogonal chemistry , cyanine , fluorescence , chemistry , tetrazine , azide , combinatorial chemistry , conjugated system , bioconjugation , covalent bond , quenching (fluorescence) , peptide , reagent , photochemistry , click chemistry , organic chemistry , biochemistry , physics , quantum mechanics , polymer
Fluorogenic probes can be used to minimize the background fluorescence of unreacted and nonspecifically adsorbed reagents. The preceding years have brought substantial developments in the design and synthesis of bioorthogonally applicable fluorogenic systems mainly based on the quenching effects of azide and tetrazine moieties. The modulation power exerted by these bioorthogonal motifs typically becomes less efficient on more conjugated systems; that is, on probes with redshifted emission wavelength. To reach efficient quenching, that is, fluorogenicity, even in the red range of the spectrum, we present the synthesis, fluorogenic, and conjugation characterization of bistetrazine‐cyanine probes with emission maxima between 600 and 620 nm. The probes can bind to genetically altered proteins harboring an 11‐amino acid peptide tag with two appending cyclooctyne motifs. Moreover, we also demonstrate the use of these bistetrazines as fluorogenic, covalent cross‐linkers between monocyclooctynylated proteins.