2X5U: 80 Microsecond Laue Diffraction Snapshot From Crystals Of A Photosynthetic Reaction Centre Without Illumination

Citation:
Abstract
Photosynthetic reaction centers convert the energy content of light into a transmembrane potential difference and so provide the major pathway for energy input into the biosphere. We applied time-resolved Laue diffraction to study light-induced conformational changes in the photosynthetic reaction center complex of Blastochloris viridis. The side chain of TyrL162, which lies adjacent to the special pair of bacteriochlorophyll molecules that are photooxidized in the primary light conversion event of photosynthesis, was observed to move 1.3 angstroms closer to the special pair after photoactivation. Free energy calculations suggest that this movement results from the deprotonation of this conserved tyrosine residue and provides a mechanism for stabilizing the primary charge separation reactions of photosynthesis.
PDB ID: 2X5UDownload
MMDB ID: 81944
PDB Deposition Date: 2010/2/10
Updated in MMDB: 2011/05
Experimental Method:
x-ray diffraction
Resolution: 3  Å
Source Organism:
Similar Structures:
Biological Unit for 2X5U: tetrameric; determined by author and by software (PISA)
Molecular Components in 2X5U
Label Count Molecule
Proteins (4 molecules)
1
Photosynthetic Reaction Center Cytochrome C Subunit
Molecule annotation
1
Reaction Center Protein H Chain
Molecule annotation
1
Reaction Center Protein L Chain
Molecule annotation
1
Reaction Center Protein M Chain
Molecule annotation
Chemicals (12 molecules)
1
4
2
4
3
2
4
1
5
1
* Click molecule labels to explore molecular sequence information.

Citing MMDB
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