Protein-Protein Interaction in Purple Membrane

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DOIResolve DOI: http://doi.org/10.1103/PhysRevLett.103.128104
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TypeArticle
Journal titlePhysical Review Letters
Volume103
Pages128104-1128104-4; # of pages: 4
AbstractWe present experimental evidence for a long-range protein-protein interaction in purple membrane (PM). The interprotein dynamics were quantified by measuring the spectrum of the acoustic phonons in the 2D bacteriorhodopsin (BR) protein lattice using inelastic neutron scattering. Phonon energies of about 1 meV were determined. The data are compared to an analytical model, and the effective spring constant for the interaction between neighboring protein trimers are determined to be k ¼ 53 N=m. Additional, optical-like excitations at 0.45 meV were found and assigned to intraprotein dynamics between neighboring BR monomers.
Publication date
LanguageEnglish
AffiliationNRC Canadian Neutron Beam Centre; National Research Council Canada
Peer reviewedYes
NPARC number14829319
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Record identifier950ab25d-dddd-4ec0-a4a5-2e71d36f258f
Record created2011-02-15
Record modified2016-05-09
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