Multiple pathway relaxation enhancement in the system composed of three paramagnetic nitroxide radical-Ln3+-O2

P. Lueders; H. Jäger; M.A. Hemminga; G. Jeschke; M. Yulikov

doi:10.1021/jz300316q

Multiple pathway relaxation enhancement in the system composed of three paramagnetic nitroxide radical-Ln3+-O2

P. Lueders, H. Jäger, M.A. Hemminga, G. Jeschke, M. Yulikov

Biophysics

Research output: Contribution to journal › Article › Academic › peer-review

14 Citations (Scopus)

Abstract

Longitudinal relaxation of nitroxide spin-labels has been measured for a membrane-incorporated alpha-helical polypeptide in the presence and absence of residual amounts of membrane-dissolved O-2 and paramagnetic Dy3+ ions. Such a model system, containing three different types of paramagnetic species, provides an important example of nonadditivity of two different relaxation channels for the nitroxide spins.

Original language	English
Pages (from-to)	1336-1340
Journal	Journal of Physical Chemistry Letters
Volume	3
Issue number	10
DOIs	https://doi.org/10.1021/jz300316q
Publication status	Published - 2012

Keywords

alpha-helical peptides
saturation recovery epr
hydrophobic mismatch
metmyoglobin variants
interspin distances
model membranes
lipid-bilayers
spin labels
lanthanide
oxygen

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abstract = "Longitudinal relaxation of nitroxide spin-labels has been measured for a membrane-incorporated alpha-helical polypeptide in the presence and absence of residual amounts of membrane-dissolved O-2 and paramagnetic Dy3+ ions. Such a model system, containing three different types of paramagnetic species, provides an important example of nonadditivity of two different relaxation channels for the nitroxide spins.",

keywords = "alpha-helical peptides, saturation recovery epr, hydrophobic mismatch, metmyoglobin variants, interspin distances, model membranes, lipid-bilayers, spin labels, lanthanide, oxygen",

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T1 - Multiple pathway relaxation enhancement in the system composed of three paramagnetic nitroxide radical-Ln3+-O2

AU - Lueders, P.

AU - Jäger, H.

AU - Hemminga, M.A.

AU - Jeschke, G.

AU - Yulikov, M.

PY - 2012

Y1 - 2012

N2 - Longitudinal relaxation of nitroxide spin-labels has been measured for a membrane-incorporated alpha-helical polypeptide in the presence and absence of residual amounts of membrane-dissolved O-2 and paramagnetic Dy3+ ions. Such a model system, containing three different types of paramagnetic species, provides an important example of nonadditivity of two different relaxation channels for the nitroxide spins.

AB - Longitudinal relaxation of nitroxide spin-labels has been measured for a membrane-incorporated alpha-helical polypeptide in the presence and absence of residual amounts of membrane-dissolved O-2 and paramagnetic Dy3+ ions. Such a model system, containing three different types of paramagnetic species, provides an important example of nonadditivity of two different relaxation channels for the nitroxide spins.

KW - alpha-helical peptides

KW - saturation recovery epr

KW - hydrophobic mismatch

KW - metmyoglobin variants

KW - interspin distances

KW - model membranes

KW - lipid-bilayers

KW - spin labels

KW - lanthanide

KW - oxygen

U2 - 10.1021/jz300316q

DO - 10.1021/jz300316q

M3 - Article

SN - 1948-7185

VL - 3

SP - 1336

EP - 1340

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

IS - 10

ER -

Multiple pathway relaxation enhancement in the system composed of three paramagnetic nitroxide radical-Ln3+-O2

Abstract

Keywords

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