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- W4238669358 abstract "To understand how photoactive proteins function, it is necessary to understand the photoresponse of the chromophore. Photoactive yellow protein (PYP) is a prototypical signaling protein. Blue light triggers trans–cis isomerization of the chromophore covalently bound within PYP as the first step in a photocycle that results in the host bacterium moving away from potentially harmful light. At higher energies, photoabsorption has the potential to create radicals and free electrons; however, this process is largely unexplored. Here, we use photoelectron spectroscopy and quantum chemistry calculations to show that the molecular structure and conformation of the isolated PYP chromophore can be exploited to control the competition between trans–cis isomerization and radical formation. We also find evidence to suggest that one of the roles of the protein is to impede radical formation in PYP by preventing torsional motion in the electronic ground state of the chromophore." @default.
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- W4238669358 date "2015-03-17" @default.
- W4238669358 modified "2023-10-14" @default.
- W4238669358 title "Controlling Radical Formation in the Photoactive Yellow Protein Chromophore" @default.
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- W4238669358 doi "https://doi.org/10.1002/ange.201500549" @default.
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