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          Institute: MPI für Biochemie     Collection: Membrane Biochemistry (D. Oesterhelt)     Display Documents



ID: 41757.0, MPI für Biochemie / Membrane Biochemistry (D. Oesterhelt)
Quantification of thermal motions in the purple membrane
Authors:Lehnert, U.; Reat, V.; Kessler, B.; Oesterhelt, D.; Zaccai, G.
Language:English
Date of Publication (YYYY-MM-DD):2002-12
Title of Journal:Applied Physics A-Materials Science & Processing
Journal Abbrev.:Appl. Phys. A-Mater. Sci. Process.
Volume:74
Issue / Number:Suppl. S
Start Page:S1287
End Page:S1289
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:Local atomic motions in bacteriorhodopsin (BR), the membrane protein in purple membranes (PMs) of Halobacterium salinarum, were studied by incoherent neutron scattering. The analysed sample consisted of fully deuterated purple membranes with BR- containing H-retinal, H-tryptophan, and H-methionine. These labelled groups are present in the retinal binding pocket and the extracellular part of BR. By using incoherent neutron scattering on two different backscattering instruments at the Institut Laue-Langevin, we. determined the mean-square displacements of small- and large-amplitude motions as a function of temperature for labelled as well as completely hydrogenated PM samples at different hydration states. We showed that the dynamics of the labelled part is more rigid, and influenced by temperature and hydration in a different way, than the membrane globally.
Comment of the Author/Creator:Date: 2002, DEC
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Biochemie/Membrane Biochemistry (D. Oesterhelt)
External Affiliations:Inst Laue Langevin, 6 Rue Jules Horowitz,BP 156, F-38042; Grenoble 9, France; Inst Laue Langevin, F-38042 Grenoble 9, France; Inst Biol Struct, F-38027 Grenoble 1, France; Inst Pharmacol & Biol Struct, F-31077 Toulouse, France
Identifiers:ISI:000181219600118 [ID No:1]
ISSN:0947-8396 [ID No:2]
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