Luminescent pyrimidine hydrazide oligomers with peptide affinity

Area of Science:

• Medicinal Chemistry
• Supramolecular Chemistry
• Biophysical Chemistry

Background:

• Pyrimidine derivatives are versatile scaffolds in medicinal chemistry.
• Understanding molecular recognition between synthetic molecules and biomolecules is crucial.
• Developing novel fluorescent probes for biological interactions is an active research area.

Purpose of the Study:

• To report the modular synthesis of pyrimidine oligohydrazides.
• To investigate the peptide binding capabilities of these novel compounds.
• To explore their potential as luminescent probes for detecting biomolecular interactions.

Main Methods:

• Modular synthesis of pyrimidine oligohydrazides with ethylene glycol substituents.
• Spectroscopic analysis (UV-Vis absorption and fluorescence emission) to characterize compounds.
• Förster Resonance Energy Transfer (FRET) studies to assess interactions with tryptophan (Trp) residues.

Main Results:

• Successfully synthesized water-soluble pyrimidine oligohydrazides.
• Demonstrated that the hydrogen bonding patterns mimic peptide backbones, restricting conformational mobility.
• Observed fluorescence emission at 423 nm upon excitation at 320 nm or via FRET from Trp residues.

Conclusions:

• Pyrimidine oligohydrazides are promising candidates for biomolecular recognition studies.
• The luminescent properties enable sensitive detection of interactions with peptides and proteins.
• This work provides a foundation for developing new fluorescent sensors for biological applications.