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          Institute: Fritz-Haber-Institut     Collection: Molecular Physics     Display Documents



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ID: 212092.0, Fritz-Haber-Institut / Molecular Physics
Charge-state resolved mid-infrared spectroscopy of a gas-phase protein
Authors:Oomens, Jos; Polfer, Nick; Moore, David T.; Meer, Lex van der; Marshall, Alan G.; Eyler, John R.; Meijer, Gerard; Helden, Gert von
Language:English
Date of Publication (YYYY-MM-DD):2005-03-07
Title of Journal:Physical Chemistry Chemical Physics
Journal Abbrev.:PCCP
Volume:7
Issue / Number:7
Start Page:1345
End Page:1348
Copyright:2005 The Owner Societies
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Infrared spectra of a 104 amino-acid protein in the gas phase as a function of its charge state are presented. The spectra contain clearly resolvable bands in the amide I and II spectral regions, as well as a band at 1483 cm–1, which is not observed in solution phase spectroscopy and is especially prominent for the higher charge states. Compared to solution, the amide I band is blue-shifted and the amide II band red-shifted, as expected for species in an environment with reduced hydrogen bonding. The band positions are suggestive of a mostly -helical structure of the protein and their widths are comparable to those in solution, suggesting a similar conformational distribution.
External Publication Status:published
Document Type:Article
Communicated by:Gerard Meijer
Affiliations:Fritz-Haber-Institut/Molecular Physics
External Affiliations:FOM Institute for Plasma Physics "Rijnhuizen", Nieuwegein, The Netherlands; Nat. High Magnetic Field Lab., Tallahassee, FL, USA; Dept. of Chemistry and Biochemistry, Florida State Univ., Tallahassee, FL, USA; Dept. of Chemistry, Univ. of Florida, Gainesville, FL, USA.
Identifiers:URL:http://www.rsc.org/publishing/journals/CP/article.... [only for subscriber]
DOI:10.1039/b502322j
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