1BRR

X-RAY STRUCTURE OF THE BACTERIORHODOPSIN TRIMER/LIPID COMPLEX

• PDB DOI: https://doi.org/10.2210/pdb1BRR/pdb

• Classification: PROTON TRANSPORT
• Organism(s): Halobacterium salinarum
• Mutation(s): No 
• Membrane Protein: Yes  PDBTMMemProtMD


• Deposited: 1998-07-28 Released: 1998-09-30 
• Deposition Author(s): Essen, L.-O., Siegert, R., Oesterhelt, D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.90 Å
• R-Value Free: 0.299 
• R-Value Work: 0.256 
• R-Value Observed: 0.256 

Biological Assembly 1  

Global Symmetry: Cyclic - C3  (Explore in 3D)
Global Stoichiometry: Homo 3-mer - A3 

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

Macromolecule Content

• Total Structure Weight: 85.8 kDa 
• Atom Count: 5,672 
• Modelled Residue Count: 693 
• Deposited Residue Count: 741 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (BACTERIORHODOPSIN)	A, B, C	247	Halobacterium salinarum	Mutation(s): 0  Membrane Entity: Yes
UniProt
Find proteins for P02945 (Halobacterium salinarum (strain ATCC 700922 / JCM 11081 / NRC-1)) Explore P02945  Go to UniProtKB:  P02945

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
3-O-sulfo-beta-D-galactopyranose-(1-6)-alpha-D-mannopyranose-(1-2)-alpha-D-glucopyranose	D, E	3		N/A
Glycosylation Resources
GlyTouCan:  G37414ZM GlyCosmos:  G37414ZM

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ARC	G [auth A], H [auth A], I [auth A], M [auth B], N [auth B], O [auth B], P [auth B], T [auth C], U [auth C], V [auth C]	3,7,11,15-TETRAMETHYL-HEXADECAN-1-OL C20 H42 O AJAKLDUGVSKVDG-UFYCRDLUSA-N
RET	F [auth A], L [auth B], S [auth C]	RETINAL C20 H28 O NCYCYZXNIZJOKI-OVSJKPMPSA-N
BGC	K [auth B]	beta-D-glucopyranose C6 H12 O6 WQZGKKKJIJFFOK-VFUOTHLCSA-N
OCT	Q [auth B]	N-OCTANE C8 H18 TVMXDCGIABBOFY-UHFFFAOYSA-N
GOL	J [auth A], R [auth B], W [auth C]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
PCA	A, B, C	L-PEPTIDE LINKING	C5 H7 N O3		GLN

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.90 Å
• R-Value Free: 0.299 
• R-Value Work: 0.256 
• R-Value Observed: 0.256 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 120.52	α = 90
b = 105.96	β = 94.94
c = 80.19	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
DENZO	data reduction
CCP4	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1998-09-30 
Deposition Author(s): Essen, L.-O., Siegert, R., Oesterhelt, D.

Revision History  

• Version 1.0: 1998-09-30
  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 2.0: 2019-12-25
  Changes: Advisory, Data collection, Database references, Derived calculations, Polymer sequence
• Version 3.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary
• Version 3.1: 2023-08-09
  Changes: Data collection, Database references, Derived calculations, Refinement description, Structure summary