3D pressure field in lipid membranes and membrane-protein complexes

O H Samuli Ollila, H Jelger Risselada, Martti Louhivuori, Erik Lindahl, Ilpo Vattulainen, Siewert J Marrink

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We calculate full 3D pressure fields for inhomogeneous nanoscale systems using molecular dynamics simulation data. The fields represent systems with increasing level of complexity, ranging from semivesicles and vesicles to membranes characterized by coexistence of two phases, including also a protein-membrane complex. We show that the 3D pressure field is distinctly different for curved and planar bilayers, the pressure field depends strongly on the phase of the membrane, and that an integral protein modulates the tension and elastic properties of the membrane.
Original languageEnglish
JournalPhysical Review Letters
Volume102
Issue number7
Pages (from-to)078101
ISSN0031-9007
Publication statusPublished - 20. Feb 2009

Keywords

  • 1,2-Dipalmitoylphosphatidylcholine
  • Escherichia coli Proteins
  • Ion Channels
  • Lipid Bilayers
  • Membrane Lipids
  • Membrane Proteins
  • Models, Biological
  • Models, Chemical

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