ISDA

Entry Detail

PDB ID:

2BNS

Keywords:

PHOTOSYNTHESIS

Title:

Lipidic cubic phase grown reaction centre from Rhodobacter sphaeroides, excited state

Biological Source:

Source Organism:

Rhodobacter sphaeroides

PDB Version:

Deposition Date:

2005-03-31

Release Date:

2005-05-27

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.50 Å

R-Value Free:

0.24

R-Value Work:

0.20

R-Value Observed:

0.21

Space Group:

P 42 21 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Reaction center protein L chain
Chain IDs:A
Chain Length:281
Number of Molecules:1
Biological Source:Rhodobacter sphaeroides

UniProt ID:P0C0Y8 Pfam ID:PF00124

Protein Blast

Polymer Type:polypeptide(L)
Description:Reaction center protein M chain
Chain IDs:B
Chain Length:307
Number of Molecules:1
Biological Source:Rhodobacter sphaeroides

UniProt ID:P0C0Y9 Pfam ID:PF00124

Protein Blast

Polymer Type:polypeptide(L)
Description:Reaction center protein H chain
Chain IDs:C
Chain Length:260
Number of Molecules:1
Biological Source:Rhodobacter sphaeroides

UniProt ID:P0C0Y7 Pfam ID:PF03967, PF05239

Ligand Molecules

BCL

BPH

FE2

MST

PO4

U10

Primary Citation

Conformational Regulation of Charge Recombination Reactions in a Photosynthetic Bacterial Reaction Centre

Katona, G, Snijder, A, Gourdon, P, Andreasson, U, Hansson, O, Andreasson, L.E, Neutze, R.Show

Nat.Struct.Mol.Biol. 12 630 ? (2005)

PMID: 15937492 DOI: 10.1038/NSMB948

Abstact

In bright light the photosynthetic reaction center (RC) of Rhodobacter sphaeroides stabilizes the P(+)(870).Q(-)(A) charge-separated state and thereby minimizes the potentially harmful effects of light saturation. Using X-ray diffraction we report a conformational change that occurs within the cytoplasmic domain of this RC in response to prolonged illumination with bright light. Our observations suggest a novel structural mechanism for the regulation of electron transfer reactions in photosynthesis.

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Primary Citation of related structures