1GUE

SENSORY RHODOPSIN II


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.27 Å
  • R-Value Free: 0.311 
  • R-Value Work: 0.277 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Early Structural Rearrangements in the Photocycle of an Integral Membrane Sensory Receptor

Edman, K.Royant, A.Nollert, P.Maxwell, C.A.Pebay-Peyroula, E.Navarro, J.Neutze, R.Landau, E.M.

(2002) Structure 10: 473

  • Primary Citation of Related Structures:  1GU8

  • PubMed Abstract: 
  • Sensory rhodopsins are the primary receptors of vision in animals and phototaxis in microorganisms. Light triggers the rapid isomerization of a buried retinal chromophore, which the protein both accommodates and amplifies into the larger structural r ...

    Sensory rhodopsins are the primary receptors of vision in animals and phototaxis in microorganisms. Light triggers the rapid isomerization of a buried retinal chromophore, which the protein both accommodates and amplifies into the larger structural rearrangements required for signaling. We trapped an early intermediate of the photocycle of sensory rhodopsin II from Natronobacterium pharaonis (pSRII) in 3D crystals and determined its X-ray structure to 2.3 A resolution. The observed structural rearrangements were localized near the retinal chromophore, with a key water molecule becoming disordered and the retinal's beta-ionone ring undergoing a prominent movement. Comparison with the early structural rearrangements of bacteriorhodopsin illustrates how modifications in the retinal binding pocket of pSRII allow subtle differences in the early relaxation of photoisomerized retinal.


    Organizational Affiliation

    Department of Molecular Biotechnology, Chalmers University of Technology, Box 462, S-40530 Gothenburg, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SENSORY RHODOPSIN II
A
239Natronomonas pharaonisGene Names: sop2 (sopII)
Find proteins for P42196 (Natronomonas pharaonis)
Go to UniProtKB:  P42196
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
RET
Query on RET

Download SDF File 
Download CCD File 
A
RETINAL
C20 H28 O
NCYCYZXNIZJOKI-OVSJKPMPSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.27 Å
  • R-Value Free: 0.311 
  • R-Value Work: 0.277 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 85.510α = 90.00
b = 128.553β = 90.00
c = 50.799γ = 90.00
Software Package:
Software NamePurpose
CCP4data scaling
DENZOdata reduction
CNSrefinement
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-04-12
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance