Literature DB >> 14671325

Direct observation of tiers in the energy landscape of a chromoprotein: a single-molecule study.

Clemens Hofmann1, Thijs J Aartsma, Hartmut Michel, Jürgen Köhler.   

Abstract

Single-molecule spectroscopic techniques were applied to individual pigments embedded in a chromoprotein. A sensitive tool to monitor structural fluctuations of the protein backbone in the local environment of the chromophore is provided by recording the changes of the spectral positions of the pigment absorptions as a function of time. The data provide information about the organization of the energy landscape of the protein in tiers that can be characterized by an average barrier height. Additionally, a correlation between the average barrier height within a distinct tier and the time scale of the structural fluctuations is observed.

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Year:  2003        PMID： 14671325      PMCID： PMC307602          DOI： 10.1073/pnas.2533896100

Source DB:  PubMed          Journal:  Proc Natl Acad Sci U S A        ISSN： 0027-8424            Impact factor:   11.205


  17 in total

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Authors:  R J Cogdell; N W Isaacs; T D Howard; K McLuskey; N J Fraser; S M Prince
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2.  Unraveling the electronic structure of individual photosynthetic pigment-protein complexes

Authors: 
Journal:  Science       Date:  1999-07-16       Impact factor: 47.728

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Journal:  Biophys J       Date:  2001-03       Impact factor: 4.033

Review 4.  Photosynthetic apparatus of purple bacteria.

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Journal:  Q Rev Biophys       Date:  2002-02       Impact factor: 5.318

5.  Single-molecule study of the electronic couplings in a circular array of molecules: light-harvesting-2 complex from Rhodospirillum molischianum.

Authors:  Clemens Hofmann; Martijn Ketelaars; Michio Matsushita; Hartmut Michel; Thijs J Aartsma; Jürgen Köhler
Journal:  Phys Rev Lett       Date:  2003-01-10       Impact factor: 9.161

6.  The energy landscapes and motions of proteins.

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9.  The crystal structure of the light-harvesting complex II (B800-850) from Rhodospirillum molischianum.

Authors:  J Koepke; X Hu; C Muenke; K Schulten; H Michel
Journal:  Structure       Date:  1996-05-15       Impact factor: 5.006

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Authors:  Fritz G Parak; G Ulrich Nienhaus
Journal:  Chemphyschem       Date:  2002-03-12       Impact factor: 3.102
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  29 in total

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4.  Protein structural deformation induced lifetime shortening of photosynthetic bacteria light-harvesting complex LH2 excited state.

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6.  Dynamics of the emission spectrum of a single LH2 complex: interplay of slow and fast nuclear motions.

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7.  Spectral diffusion of the lowest exciton component in the core complex from Rhodopseudomonas palustris studied by single-molecule spectroscopy.

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8.  Single-molecule spectroscopic characterization of light-harvesting 2 complexes reconstituted into model membranes.

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9.  Comparative study of spectral flexibilities of bacterial light-harvesting complexes: structural implications.

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10.  Single molecule fluorescence of native and refolded peridinin-chlorophyll-protein complexes.

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