Dependence of tryptophan emission wavelength on conformation in cyclic hexapeptides

Article Abstract:

Quantum mechanical/molecular dynamics (QM/MD) simulations of the six canonical side chain rotamers of tryptophan in the seven cyclic hexapeptides are described. The emission maxima of the three decay-associated spectra for the seven peptides ranged form 314 to 359nm, suggesting that different tryptophan rotamers have different emission maxima even in the case of solvent-exposed tryptophans and these spectra could aid in the assignment of fluorescence lifetimes to tryptophan rotamers.

Quantum theory, Quantum mechanics, Molecular dynamics, Spectra

---

Quantitative prediction of fluorescence quantum yields for tryptophan in proteins

Article Abstract:

A reasonable basis for the 30-fold variation by the use of quantum mechanics-molecular mechanics simulations is proposed in which the energy of the lowest Trp ring-to-amide backbone charge transfer (CT) state is monitored during dynamics trajectories for 24 Trps in 17 proteins. The full range of tryptophan (trp) fluorescence quantum yields observed in proteins is due primarily to different degrees of electron transfer from the indole ring to a local amide.

Fluorescence, Optical properties, Chemical properties

---

Fluorescence properties of Benz[f]indole, a wavelength and quenching selective tryptophan analog

Article Abstract:

Research is presented describing a study of the fluorescence of two benzannulated indole derivatives to investigate peptide-protein and protein-protein interactions.

Research, Peptides, Biophysics

Similar abstracts:

• Abstracts: Influence of shear stress on cationic surfactant uptake by anionic gels. Friction of gels. 5. negative load dependence of polysaccharide gels
• Abstracts: Alternative explanation of the difference between translational diffusion and rotational diffusion in supercooled liquids
• Abstracts: Theoretical study of structural and electronic properties of naked stoichiometric and nonstoichiometric indium phosphide cluster
• Abstracts: Etching of the InP (001) surface by halogens: Reaction mechanisms obtained by density-functional calculations
• Abstracts: Raman and IR spectroscopy of silver iodide/silver selenate fast ion-cinducting glasses. Optical properties of gold-silver iodide nanoparticle pair-structures

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.