Photosynthetic apparatus of purple bacteria

@article{Hu2002PhotosyntheticAO,
  title={Photosynthetic apparatus of purple bacteria},
  author={Xiche Hu and Thorsten Ritz and Ana Damjanovic and Felix Autenrieth and Klaus Schulten},
  journal={Quarterly Reviews of Biophysics},
  year={2002},
  volume={35},
  pages={1 - 62}
}
1. Introduction 2 2. Structure of the bacterial PSU 5 2.1 Organization of the bacterial PSU 5 2.2 The crystal structure of the RC 9 2.3 The crystal structures of LH-II 11 2.4 Bacteriochlorophyll pairs in LH-II and the RC 13 2.5 Models of LH-I and the LH-I-RC complex 15 2.6 Model for the PSU 17 3. Excitation transfer in the PSU 18 3.1 Electronic excitations of BChls 22 3.1.1 Individual BChls 22 3.1.2 Rings of BChls 22 3.1.2.1 Exciton states 22 3.1.3 Effective Hamiltonian 24 3.1.4 Optical… 

Photosynthesis in the Purple Bacteria

A computational and systems biology approach is discussed for determining the ATP production rate and energy conversion efficiency of a single chromatophore vesicle, based upon considerations from a quantitative supramolecular structural model.

The Influence of Symmetry on the Electronic Structure of the Photosynthetic Pigment-Protein Complexes from Purple Bacteria

The primary reactions of purple bacterial photosynthesis take place in two pigment-protein complexes, the peripheral LH2 complex and the core RC-LH1 complex. In order to understand any type of

Watching the photosynthetic apparatus in native membranes.

This work reports images obtained with an atomic force microscope of native photosynthetic membranes from the bacterium Rhodospirillum photometricum, allowing the analysis and modeling of the lateral organization of multiple components of the photosynthesis apparatus within a native membrane.

Multireference Excitation Energies for Bacteriochlorophylls A within Light Harvesting System 2.

The obtained results mark a giant leap for multiconfigurational multireference quantum chemical methods in the photochemistry of biological systems, which can prove instrumental in exposing the underlying physics of photosynthetic light-harvesting.

Is there elliptic distortion in the light harvesting complex 2 of purple bacteria?

It is found that uniform modulation of k = 2 symmetry cannot explain the dependence of intensity ratios on the Gap of the two major peaks of the B850 unit of light harvesting complex 2 (LH2) nor the ensemble line shape.

From Atomic-Level Structure to Supramolecular Organization in the Photosynthetic Unit of Purple Bacteria

This chapter provides a summary of recent research on the architectural and biophysical aspects of the purple bacterial photosynthetic unit (PSU) and its constituents.

Refinement of the x-ray structure of the RC–LH1 core complex from Rhodopseudomonas palustris by single-molecule spectroscopy

A unique combination of single-molecule spectroscopy with numerical simulations has allowed us to achieve a refined structural model for the bacteriochlorophyll a (BChl a) pigment arrangement in

Spectroscopic Investigations of Light-Harvesting 2 Complexes from Rps. acidophila

A better understanding of light capturing and energy transfer processes in natural photosynthesis can contribute to the development of a highly efficient, artificial, molecular-based technology that

The long-range organization of a native photosynthetic membrane

An organization is proposed for this photosynthetic membrane that features domains containing linear arrays of RC–LH1–PufX complexes interspersed with LH2 complexes and some LH2 found in separate domains that allows the simultaneous assessment of both global and local structural information on the organization of intact, untreated membranes.
...

References

SHOWING 1-10 OF 243 REFERENCES

Superradiance and Exciton Delocalization in Bacterial Photosynthetic Light-Harvesting Systems

We present temperature-dependent fluorescence quantum yield and lifetime measurements on the LH-1 and LH-2 complexes of Rhodobacter sphaeroides and on the isolated B820 subunit of Rhodospirillum

The Dimerization of Chlorophyll a, Chlorophyll b, and Bacteriochlorophyll in Solution1

Analyses· of the absorption spectra of three chlorophylls in carbon tetrach1oride solution demonstrate the existence of monomer dimer equilibrium in the concentration range from 10-6 to 10-3

Excitation energy trapping by the reaction center of Rhodobacter Sphaeroides

The excitation energy transfer between light-harvesting complex I (LH-I) and the photosynthetic reaction center (RC) of the purple bacterium Rhodobacter (Rb.) sphaeroides is investigated on the basis

Pigment Organization and Transfer of Electronic Excitation in the Photosynthetic Unit of Purple Bacteria

Absorption of light by light-harvesting complexes and transfer of electronic excitation to the photosynthetic reaction center (RC) constitute the primary light-harvesting process of photosynthesis.

Three-dimensional structure of cyanobacterial photosystem I at 2.5 Å resolution

The structure of photosystem I from the thermophilic cyanobacterium Synechococcus elongatus described here provides a picture at atomic detail of 12 protein subunits and 127 cofactors comprising 96 chlorophylls, 2 phylloquinones, 3 Fe4S4 clusters, 22 carotenoids, 4 lipids, a putative Ca2+ ion and 201 water molecules.
...