Proton transport in proteins and the role of quantum tunneling

Salna, Bridget

doi:10.17760/d20248978

DOI: 10.17760/d20248978

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Proton transport in proteins and the role of quantum tunneling

Bridget Salna¹

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Photoacid Dynamics in the Green Fluorescent Protein

Thor

Champion

2023

Annu. Rev. Phys. Chem.

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The photoacid dynamics of fluorescent proteins include both electronic excited- and ground-state mechanisms of proton transfer. The associated characteristic timescales of these reactions range over many orders of magnitude, and the tunneling, barrier crossing, and relevant thermodynamics have in certain cases been linked to coherent nuclear motion. We review the literature and summarize the experiments and theory that demonstrate proton tunneling in the electronic ground state of the green fluorescent protein (GFP). We also discuss the excited-state proton-transfer reaction of GFP that takes place on the picosecond timescale. Although this reaction has been investigated using several vibrational spectroscopic methods, the interpretation remains unsettled. We discuss recent advances as well as remaining questions, in particular those related to the vibrational mode couplings that involve low-frequency modulations of chromophore vibrations on the timescale of proton transfer. Expected final online publication date for the Annual Review of Physical Chemistry, Volume 74 is April 2023. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

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Photoacid Dynamics in the Green Fluorescent Protein

Thor

Champion

2023

Annu. Rev. Phys. Chem.

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Proton transport in proteins and the role of quantum tunneling

Cited by 1 publication

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Photoacid Dynamics in the Green Fluorescent Protein

Photoacid Dynamics in the Green Fluorescent Protein

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