Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Biological Assembly 2  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 40.24 kDa 
• Atom Count: 2107 
• Modelled Residue Count: 217 
• Deposited Residue Count: 261 
• Unique protein chains: 1

1XIO

Anabaena sensory rhodopsin

• DOI: 10.2210/pdb1XIO/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Nostoc sp. PCC 7120 = FACHB-418
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2004-09-21 Released: 2004-10-05 
• Deposition Author(s): Vogeley, L., Luecke, H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.256 
• R-Value Work: 0.230 

Literature

Anabaena sensory rhodopsin: a photochromic color sensor at 2.0 A.

Vogeley, L., Sineshchekov, O.A., Trivedi, V.D., Sasaki, J., Spudich, J.L., Luecke, H.

(2004) Science 306: 1390-1393

• PubMed: 15459346 
• DOI: 10.1126/science.1103943
• Primary Citation of Related Structures:  
  1XIO


• PubMed Abstract: 
  

Microbial sensory rhodopsins are a family of membrane-embedded photoreceptors in prokaryotic and eukaryotic organisms. Structures of archaeal rhodopsins, which function as light-driven ion pumps or photosensors, have been reported. We present the structure of a eubacterial rhodopsin, which differs from those of previously characterized archaeal rhodopsins in its chromophore and cytoplasmic-side portions. Anabaena sensory rhodopsin exhibits light-induced interconversion between stable 13-cis and all-trans states of the retinylidene protein. The ratio of its cis and trans chromophore forms depends on the wavelength of illumination, thus providing a mechanism for a single protein to signal the color of light, for example, to regulate color-sensitive processes such as chromatic adaptation in photosynthesis. Its cytoplasmic half channel, highly hydrophobic in the archaeal rhodopsins, contains numerous hydrophilic residues networked by water molecules, providing a connection from the photoactive site to the cytoplasmic surface believed to interact with the receptor's soluble 14-kilodalton transducer.

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Organizational Affiliation: 

Department of Molecular Biology and Biochemistry, University of California, Irvine, CA 92697, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ANABAENA SENSORY RHODOPSIN	A	261	Nostoc sp. PCC 7120 = FACHB-418	Mutation(s): 0  Gene Names: alr3165
Find proteins for Q8YSC4 (Nostoc sp. (strain PCC 7120 / SAG 25.82 / UTEX 2576)) Explore Q8YSC4  Go to UniProtKB:  Q8YSC4

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PEE	C [auth A],  D [auth A],  E [auth A],  F [auth A],  G [auth A],  H [auth A],  I [auth A],  J [auth A],  K [auth A],  L [auth A],  M [auth A],  N [auth A],  O [auth A]	1,2-Dioleoyl-sn-glycero-3-phosphoethanolamine C41 H83 N O8 P LVNGJLRDBYCPGB-LDLOPFEMSA-O
RET	B [auth A]	RETINAL C20 H28 O NCYCYZXNIZJOKI-OVSJKPMPSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.256 
• R-Value Work: 0.230 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 103.095	α = 90
b = 116.513	β = 90
c = 56.186	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
CNS	refinement
HKL-2000	data reduction
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-09-21 
• Released Date: 2004-10-05 
Deposition Author(s): Vogeley, L., Luecke, H.

Revision History  

• Version 1.0: 2004-10-05
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance
• Version 1.3: 2014-10-29
  Changes: Non-polymer description
• Version 1.4: 2017-10-11
  Changes: Refinement description