dc.contributor.author
Gast, P.
dc.contributor.author
Herbonnet, R. T. L.
dc.contributor.author
Klare, J.
dc.contributor.author
Nalepa, A.
dc.contributor.author
Rickert, C.
dc.contributor.author
Stellinga, D.
dc.contributor.author
Urban, L.
dc.contributor.author
Möbius, Klaus
dc.contributor.author
Savitsky, Anton
dc.contributor.author
Steinhoff, H.-J.
dc.contributor.author
Groenen, E. J. J.
dc.date.accessioned
2018-06-08T02:56:08Z
dc.date.available
2014-12-18T11:03:28.162Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/14167
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-18364
dc.description.abstract
On the basis of experiments at 275 GHz, we reconsider the dependence of the
continuous-wave EPR spectra of nitroxide spin-labeled protein sites in
sensory- and bacteriorhodopsin on the micro-environment. The high magnetic
field provides the resolution necessary to disentangle the effects of hydrogen
bonding and polarity. In the gxx region of the 275 GHz EPR spectrum, bands are
resolved that derive from spin-label populations carrying no, one or two
hydrogen bonds. The gxx value of each population varies hardly from site to
site, significantly less than deduced previously from studies at lower
microwave frequencies. The fractions of the populations vary strongly, which
provides a consistent description of the variation of the average gxx and the
average nitrogen-hyperfine interaction Azz from site to site. These variations
reflect the difference in the proticity of the micro-environment, and
differences in polarity contribute marginally. Concomitant W-band ELDOR-
detected NMR experiments on the corresponding nitroxide in perdeuterated water
resolve population-specific nitrogen-hyperfine bands, which underlies the
interpretation for the proteins.
en
dc.rights.uri
http://creativecommons.org/licenses/by-nc/3.0/
dc.subject.ddc
500 Naturwissenschaften und Mathematik::540 Chemie::541 Physikalische Chemie
dc.title
Hydrogen bonding of nitroxide spin labels in membrane proteins
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation
Physical Chemistry Chemical Physics. - 16 (2014), 30, S.15910-15916
dc.identifier.sepid
37546
dcterms.bibliographicCitation.doi
10.1039/C4CP01741B
dcterms.bibliographicCitation.url
http://dx.doi.org/10.1039/C4CP01741B
refubium.affiliation
Physik
de
refubium.affiliation.other
Institut für Experimentalphysik
refubium.mycore.fudocsId
FUDOCS_document_000000021490
refubium.resourceType.isindependentpub
no
refubium.mycore.derivateId
FUDOCS_derivate_000000004302
dcterms.accessRights.openaire
open access
dcterms.isPartOf.issn
1463-9076