1KBY

Structure of Photosynthetic Reaction Center with bacteriochlorophyll-bacteriopheophytin heterodimer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

The structure of the heterodimer reaction center from Rhodobacter sphaeroides at 2.55 a resolution.

Camara-Artigas, A.Magee, C.Goetsch, A.Allen, J.P.

(2002) Photosynth Res 74: 87-93

  • DOI: 10.1023/A:1020882402389
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Crystals have been obtained of reaction centers of the heterodimer mutant that has significantly different properties than wild type due to the primary donor being formed from both a bacteriochlorophyll and bacteriopheophytin rather than two bacterio ...

    Crystals have been obtained of reaction centers of the heterodimer mutant that has significantly different properties than wild type due to the primary donor being formed from both a bacteriochlorophyll and bacteriopheophytin rather than two bacteriochlorophylls as found for wild type. The crystals belong to the trigonal space group P3(1)21 and the structure has been refined to a resolution limit of 2.55 A with an R factor of 19.0%. The electron density maps confirm that a primary donor does indeed contain a bacteriopheophytin due to the His to Leu substitution at M202 that coordinates the corresponding bacteriochlorophyll in wild-type. Other structural changes compared to wild type are relatively minor with the relative orientation and positioning of the two tetrapyrroles forming the primary donor being unchanged within the error. Compared to wild type, the only significant alterations are small shifts of residues M196 to M206, a rotation of the side chain of Ile M206, and the loss of a bound water molecule that in wild-type is hydrogen-bonded to both His M202 and the bacteriochlorophyll monomer on the active branch. Since hydrogen-bonding interactions strongly influence the energies of tetrapyrroles, the loss of the water molecule should result in changes in the energies of the bacteriochlorophyll monomer that contributes to the observed functional differences with wild-type.


    Related Citations: 
    • Effects of Hydrogen Bonding to a Bacteriochklorophyll-bacteriopheophytin Dimer in Reaction Centers from Rhodobacter Sphaeroides
      Allen, J.P., Artz, K., Lin, X., Williams, J.C., Ivancich, A., Albouy, D., Mattioli, T.A., Fetsch, A., Kuhn, M., Lubitz, W.
      (1996) Biochemistry 35: 6612

    Organizational Affiliation

    Center for the Study of Early Events in Photosynthesis and Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ, 85287-1604, USA, jallen@asu.edu.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PHOTOSYNTHETIC REACTION CENTER PROTEIN L CHAINL281Rhodobacter sphaeroidesMutation(s): 0 
Gene Names: pufL
Find proteins for P0C0Y8 (Rhodobacter sphaeroides)
Explore P0C0Y8 
Go to UniProtKB:  P0C0Y8
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PHOTOSYNTHETIC REACTION CENTER PROTEIN M CHAINM307Rhodobacter sphaeroidesMutation(s): 1 
Gene Names: pufM
Find proteins for P0C0Y9 (Rhodobacter sphaeroides)
Explore P0C0Y9 
Go to UniProtKB:  P0C0Y9
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
PHOTOSYNTHETIC REACTION CENTER PROTEIN H CHAINH260Rhodobacter sphaeroidesMutation(s): 0 
Gene Names: puhA
Find proteins for P0C0Y7 (Rhodobacter sphaeroides)
Explore P0C0Y7 
Go to UniProtKB:  P0C0Y7
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 7 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CDL
Query on CDL

Download CCD File 
M
CARDIOLIPIN
C81 H156 O17 P2
XVTUQDWPJJBEHJ-KZCWQMDCSA-L
 Ligand Interaction
BCL
Query on BCL

Download CCD File 
L
BACTERIOCHLOROPHYLL A
C55 H74 Mg N4 O6
DSJXIQQMORJERS-RUUWGSCADZ
 Ligand Interaction
BPH
Query on BPH

Download CCD File 
L, M
BACTERIOPHEOPHYTIN A
C55 H76 N4 O6
KWOZSBGNAHVCKG-SZQBJALDSA-N
 Ligand Interaction
U10
Query on U10

Download CCD File 
M
UBIQUINONE-10
C59 H90 O4
ACTIUHUUMQJHFO-UPTCCGCDSA-N
 Ligand Interaction
SPO
Query on SPO

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M
SPHEROIDENE
C41 H60 O
FJOCMTHZSURUFA-KXCOHNEYSA-N
 Ligand Interaction
FE
Query on FE

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M
FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

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M
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.195 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 142.31α = 90
b = 142.31β = 90
c = 187.59γ = 120
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
CNSrefinement
CCP4data scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-11-13
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.3: 2018-01-31
    Changes: Experimental preparation