0000000001320366

AUTHOR

Uriel N. Morzan

showing 3 related works from this author

Short hydrogen bonds enhance nonaromatic protein-related fluorescence

2021

Significance Intrinsic fluorescence of nonaromatic amino acids is a puzzling phenomenon with an enormous potential in biophotonic applications. The physical origins of this effect, however, remain elusive. Herein, we demonstrate how specific hydrogen bond networks can modulate fluorescence. We highlight the key role played by short hydrogen bonds, present in the protein structure, on the ensuing fluorescence. We provide detailed experimental and molecular evidence to explain these unusual nonaromatic optical properties. Our findings should benefit the design of novel optically active biomaterials for applications in biosensing and imaging.

Chemical transformationOptics and PhotonicsGlutamineIntrinsic fluorescenceMolecular Dynamics SimulationPhotochemistryFluorescenceAb initio molecular dynamicsAmmoniaHumansSingle amino acidshort hydrogen bondDensity Functional TheoryMultidisciplinaryHydrogen bondChemistryintrinsic fluorescenceultraviolet fluorescenceHydrogen BondingConical intersectionFluorescenceBiophysics and Computational BiologyExcited statePhysical Sciences408PeptidesProceedings of the National Academy of Sciences of the United States of America
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Short hydrogen bonds enhance non-aromatic protein-related fluorescence

2020

AbstractFluorescence in biological systems is usually associated with the presence of aromatic groups. Here, we show that specific hydrogen bonding networks can significantly affect fluorescence employing a combined experimental and computational approach. In particular, we reveal that the single amino acid L-glutamine, by undergoing a chemical transformation leading to the formation of a short hydrogen bond, displays optical properties that are significantly enhanced compared to L-glutamine itself. Ab initio molecular dynamics simulations highlight that these short hydrogen bonds prevent the appearance of a conical intersection between the excited and the ground states and thereby signific…

ProtonChemistryHydrogen bond02 engineering and technologyConical intersection010402 general chemistry021001 nanoscience & nanotechnologyRing (chemistry)01 natural sciencesFluorescence0104 chemical sciencessymbols.namesakeChemical physicsStokes shiftMolecular vibrationExcited statesymbols0210 nano-technology
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CCDC 1981551: Experimental Crystal Structure Determination

2021

Related Article: Amberley D. Stephens, Muhammad Nawaz Qaisrani, Michael T. Ruggiero, Gonzalo Díaz Mirón, Uriel N. Morzan, Mariano C. González Lebrero, Saul T. E. Jones, Emiliano Poli, Andrew D. Bond, Philippa J. Woodhams, Elyse M. Kleist, Luca Grisanti, Ralph Gebauer, J. Axel Zeitler, Dan Credgington, Ali Hassanali, Gabriele S. Kaminski Schierle|2021|Proc.Nat.Acad.Sci.USA|118|e2020389118|doi:10.1073/pnas.2020389118

Space GroupCrystallographyCrystal SystemCrystal Structureammonium 5-oxopyrrolidine-2-carboxylate 5-oxoprolineCell ParametersExperimental 3D Coordinates
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