Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction | Predict Membrane 

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 4-mer - A1B1C1D1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 4-mer - A2B1C1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction | Predict Membrane 

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 8-mer - A2B2C2D2 Pseudo Symmetry: Cyclic - C2  (3D View)
Pseudo Stoichiometry: Hetero 8-mer - A4B2C2 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 143.61 kDa 
• Atom Count: 10140 
• Modelled Residue Count: 1186 
• Deposited Residue Count: 1190 
• Unique protein chains: 4

1R2C

PHOTOSYNTHETIC REACTION CENTER BLASTOCHLORIS VIRIDIS (ATCC)

• PDB DOI: 10.2210/pdb1R2C/pdb

• Classification: PHOTOSYNTHESIS
• Organism(s): Blastochloris viridis
• Mutation(s): Yes 
• Membrane Protein: Yes  PDBTMMemProtMD


• Deposited: 2003-09-26 Released: 2004-04-27 
• Deposition Author(s): Baxter, R.H., Ponomarenko, N., Pahl, R., Srajer, V., Moffat, K., Norris, J.R.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.86 Å
• R-Value Free: 0.228 
• R-Value Work: 0.202 
• R-Value Observed: 0.202 

Literature

Time-resolved crystallographic studies of light-induced structural changes in the photosynthetic reaction center.

Baxter, R.H., Ponomarenko, N., Srajer, V., Pahl, R., Moffat, K., Norris, J.R.

(2004) Proc Natl Acad Sci U S A 101: 5982-5987

• PubMed: 15073325 
• DOI: 10.1073/pnas.0306840101
• Primary Citation of Related Structures:  
  1R2C


• PubMed Abstract: 
  

Light-induced structural changes in the bacterial reaction center were studied by a time-resolved crystallographic experiment. Crystals of protein from Blastochloris viridis (formerly Rhodopseudomonas viridis) were reconstituted with ubiquinone and analyzed by monochromatic and Laue diffraction, in the dark and 3 ms after illuminating the crystal with a pulsed laser (630 nm, 3 mJ/pulse, 7 ns duration). Refinement of monochromatic data shows that ubiquinone binds only in the "proximal" Q(B) binding site. No significant structural difference was observed between the light and dark datasets; in particular, no quinone motion was detected. This result may be reconciled with previous studies by postulating equilibration of the "distal" and "proximal" binding sites upon extended dark adaption, and in which movement of ubiquinone is not the conformational gate for the first electron transfer between Q(A) and Q(B).

---

Organizational Affiliation: 

Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, IL 60637, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Photosynthetic reaction center cytochrome C subunit precursor	A [auth C]	336	Blastochloris viridis	Mutation(s): 0  Gene Names: pufC, cytC, BVIRIDIS_00500 Membrane Entity: Yes
UniProt
Find proteins for P07173 (Blastochloris viridis) Explore P07173  Go to UniProtKB:  P07173

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Reaction center protein L chain	B [auth L]	273	Blastochloris viridis	Mutation(s): 0  Gene Names: pufL Membrane Entity: Yes
UniProt
Find proteins for P06009 (Blastochloris viridis) Explore P06009  Go to UniProtKB:  P06009

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Reaction center protein M chain	C [auth M]	323	Blastochloris viridis	Mutation(s): 0  Gene Names: pufM Membrane Entity: Yes
UniProt
Find proteins for P06010 (Blastochloris viridis) Explore P06010  Go to UniProtKB:  P06010

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
Reaction center protein H chain	D [auth H]	258	Blastochloris viridis	Mutation(s): 1  Gene Names: puhA Membrane Entity: Yes
UniProt
Find proteins for P06008 (Blastochloris viridis) Explore P06008  Go to UniProtKB:  P06008

Small Molecules

Ligands 9 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
BCB	I [auth L], J [auth L], R [auth M], S [auth M]	BACTERIOCHLOROPHYLL B C55 H72 Mg N4 O6 QNWPCDKNPGOYNP-LQPBATPMDK
BPB	K [auth L], T [auth M]	BACTERIOPHEOPHYTIN B C55 H74 N4 O6 SFKCKJXMIAKQMY-GTTFDWDMSA-N
MQ7	U [auth M]	MENAQUINONE-7 C46 H64 O2 RAKQPZMEYJZGPI-LJWNYQGCSA-N
HEM	E [auth C], F [auth C], G [auth C], H [auth C]	PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L
NS5	V [auth M]	15-cis-1,2-dihydroneurosporene C40 H60 NHKJSVKSSGKUCH-DBWJSHEJSA-N
UQ2	L	UBIQUINONE-2 C19 H26 O4 SQQWBSBBCSFQGC-JLHYYAGUSA-N
LDA	BA [auth H], M [auth L], W [auth M], X [auth M], Y [auth M], Z [auth M]	LAURYL DIMETHYLAMINE-N-OXIDE C14 H31 N O SYELZBGXAIXKHU-UHFFFAOYSA-N
SO4	AA [auth H], O [auth M], P [auth M], Q [auth M]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
FE2	N [auth M]	FE (II) ION Fe CWYNVVGOOAEACU-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
FME	D [auth H]	L-PEPTIDE LINKING	C6 H11 N O3 S		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.86 Å
• R-Value Free: 0.228 
• R-Value Work: 0.202 
• R-Value Observed: 0.202 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 223.5	α = 90
b = 223.5	β = 90
c = 112.5	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
CNS	refinement
MOSFLM	data reduction
CCP4	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-09-26 
• Released Date: 2004-04-27 
Deposition Author(s): Baxter, R.H., Ponomarenko, N., Pahl, R., Srajer, V., Moffat, K., Norris, J.R.

Revision History  

• Version 1.0: 2004-04-27
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Non-polymer description, Version format compliance