Transmembrane helix tilting: insights from calculating the potential of mean force.

Transmembrane helix tilting: insights from calculating the potential of mean force. Research Abstract Details 

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Transmembrane helix tilting: insights from calculating the potential of mean force. Abstract Text:

Jinhyuk Lee,Wonpil Im,

To explore the microscopic forces governing the helix tilting in membranes, we have calculated the potential of mean force (PMF) as a function of tilt angle (tau) of WALP19, a transmembrane model peptide, in a dimyristoylphosphatidylcholine membrane. The PMF shows a wide range of thermally accessible tilt angles (5 degrees to 22 degrees ) with a minimum at tau=12.5 degrees . The free energy decomposition reveals that the helix tilting up to tau=12.5 degrees is mostly driven by the entropy contribution arising from the helix precession around the membrane normal, whereas the PMF increase after tau=12.5 degrees results from helical deformation due to the sequence-specific helix-lipid interactions.

Transmembrane helix tilting: insights from calculating the potential of mean force. Publishing Authors By Initials

J Lee,W Im,

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Transmembrane helix tilting: insights from calculating the potential of mean force. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Physical review letters

VOLUME: 100

Page Numbers: 018103

Journal Abbreviation: Phys. Rev. Lett.

ISSN: 0031-9007

DAY: 8

MONTH: 01

YEAR: 2008

Transmembrane helix tilting: insights from calculating the potential of mean force. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Transmembrane helix tilting: insights from calculating the potential of mean force.

AFFILIATION: Department of Molecular Biosciences and Center for Bioinformatics, The University of Kansas, 2030 Becker Drive, Lawrence, Kansas 66047, USA.

Country: United States

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MEDLINETA: Phys Rev Lett

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