Experimental evidence of logarithmic relaxation in single-particle dynamics of hydrated protein molecules

Xiang Qiang Chu; Marco Lagi; Eugene Mamontov; Emiliano Fratini; Piero Baglioni; Sow Hsin Chen

doi:10.1039/c002602f

Experimental evidence of logarithmic relaxation in single-particle dynamics of hydrated protein molecules

Xiang Qiang Chu, Marco Lagi, Eugene Mamontov, Emiliano Fratini, Piero Baglioni, Sow Hsin Chen

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Abstract

We observe a logarithmic-like decay of the intermediate scattering function (ISF) of the hydrogen atoms in the protein molecule in the time interval from 10 ps to 1 ns. We analyze the ISF, F_H(Q,t), in terms of an asymptotic expression proposed by mode coupling theory (MCT). The result clearly shows that this logarithmic stretching of the β-relaxation range is real, substantiating the prediction of the molecular dynamics (MD) simulation results that used the formula proposed by MCT for the analysis of ISF.

Original language	English
Pages (from-to)	2623-2627
Number of pages	5
Journal	Soft Matter
Volume	6
Issue number	12
DOIs	https://doi.org/10.1039/c002602f
State	Published - 2010
Externally published	Yes

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title = "Experimental evidence of logarithmic relaxation in single-particle dynamics of hydrated protein molecules",

abstract = "We observe a logarithmic-like decay of the intermediate scattering function (ISF) of the hydrogen atoms in the protein molecule in the time interval from 10 ps to 1 ns. We analyze the ISF, FH(Q,t), in terms of an asymptotic expression proposed by mode coupling theory (MCT). The result clearly shows that this logarithmic stretching of the β-relaxation range is real, substantiating the prediction of the molecular dynamics (MD) simulation results that used the formula proposed by MCT for the analysis of ISF.",

author = "Chu, {Xiang Qiang} and Marco Lagi and Eugene Mamontov and Emiliano Fratini and Piero Baglioni and Chen, {Sow Hsin}",

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T1 - Experimental evidence of logarithmic relaxation in single-particle dynamics of hydrated protein molecules

AU - Chu, Xiang Qiang

AU - Lagi, Marco

AU - Mamontov, Eugene

AU - Fratini, Emiliano

AU - Baglioni, Piero

AU - Chen, Sow Hsin

PY - 2010

Y1 - 2010

N2 - We observe a logarithmic-like decay of the intermediate scattering function (ISF) of the hydrogen atoms in the protein molecule in the time interval from 10 ps to 1 ns. We analyze the ISF, FH(Q,t), in terms of an asymptotic expression proposed by mode coupling theory (MCT). The result clearly shows that this logarithmic stretching of the β-relaxation range is real, substantiating the prediction of the molecular dynamics (MD) simulation results that used the formula proposed by MCT for the analysis of ISF.

AB - We observe a logarithmic-like decay of the intermediate scattering function (ISF) of the hydrogen atoms in the protein molecule in the time interval from 10 ps to 1 ns. We analyze the ISF, FH(Q,t), in terms of an asymptotic expression proposed by mode coupling theory (MCT). The result clearly shows that this logarithmic stretching of the β-relaxation range is real, substantiating the prediction of the molecular dynamics (MD) simulation results that used the formula proposed by MCT for the analysis of ISF.

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U2 - 10.1039/c002602f

DO - 10.1039/c002602f

M3 - Article

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VL - 6

SP - 2623

EP - 2627

JO - Soft Matter

JF - Soft Matter

IS - 12

ER -

Experimental evidence of logarithmic relaxation in single-particle dynamics of hydrated protein molecules

Abstract

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