| Ab initio study of the excited-state deactivation pathways of protonated tryptophan and tyrosine. | |
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MedLine Citation:
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PMID: 17447763 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In recent experiments, the excited-state lifetimes of protonated aromatic amino acids (TrpH+ and TyrH+) have been recorded by means of pump-probe photodissociation technique. The lifetime of TyrH+ is much longer than that of TrpH+, which has been initially rationalized on the basis of a simple phenomenological model. Besides, specific photofragments including the formation of radical cation after hydrogen loss are observed for TrpH+ that are not found for TyrH+. The ab initio calculations reported here for TrpH+ and TyrH+ using a coupled-cluster method are meant to track the rich photochemistry of these protonated amino acids following UV excitation. |
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Authors:
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Gilles Grégoire; Christophe Jouvet; Claude Dedonder; Andrzej L Sobolewski |
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Publication Detail:
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Type: Journal Article Date: 2007-04-21 |
Journal Detail:
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Title: Journal of the American Chemical Society Volume: 129 ISSN: 0002-7863 ISO Abbreviation: J. Am. Chem. Soc. Publication Date: 2007 May |
Date Detail:
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Created Date: 2007-05-09 Completed Date: 2007-06-22 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7503056 Medline TA: J Am Chem Soc Country: United States |
Other Details:
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Languages: eng Pagination: 6223-31 Citation Subset: IM |
Affiliation:
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Laboratoire de Physique des Lasers du CNRS, Institut Galilée, Université Paris 13, 93430 Villetaneuse, France. gregoire@lpl.univ-paris13.fr |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Isomerism Models, Molecular Photochemistry Protons* Thermodynamics Tryptophan / chemistry* Tyrosine / chemistry* Ultraviolet Rays |
| Chemical | |
Reg. No./Substance:
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0/Protons; 55520-40-6/Tyrosine; 73-22-3/Tryptophan |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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