1H2S

Molecular basis of transmenbrane signalling by sensory rhodopsin II-transducer complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Molecular Basis of Transmembrane Signalling by Sensory Rhodopsin II-Transducer Complex

Gordeliy, V.I.Labahn, J.Moukhametzianov, R.Efremov, R.Granzin, J.Schlesinger, R.Bueldt, G.Savopol, T.Scheidig, A.Klare, J.P.Engelhard, M.

(2002) Nature 419: 484

  • DOI: 10.1038/nature01109
  • Also Cited By: 2F95, 2F93

  • PubMed Abstract: 
  • Microbial rhodopsins, which constitute a family of seven-helix membrane proteins with retinal as a prosthetic group, are distributed throughout the Bacteria, Archaea and Eukaryota. This family of photoactive proteins uses a common structural design f ...

    Microbial rhodopsins, which constitute a family of seven-helix membrane proteins with retinal as a prosthetic group, are distributed throughout the Bacteria, Archaea and Eukaryota. This family of photoactive proteins uses a common structural design for two distinct functions: light-driven ion transport and phototaxis. The sensors activate a signal transduction chain similar to that of the two-component system of eubacterial chemotaxis. The link between the photoreceptor and the following cytoplasmic signal cascade is formed by a transducer molecule that binds tightly and specifically to its cognate receptor by means of two transmembrane helices (TM1 and TM2). It is thought that light excitation of sensory rhodopsin II from Natronobacterium pharaonis (SRII) in complex with its transducer (HtrII) induces an outward movement of its helix F (ref. 6), which in turn triggers a rotation of TM2 (ref. 7). It is unclear how this TM2 transition is converted into a cellular signal. Here we present the X-ray structure of the complex between N. pharaonis SRII and the receptor-binding domain of HtrII at 1.94 A resolution, which provides an atomic picture of the first signal transduction step. Our results provide evidence for a common mechanism for this process in phototaxis and chemotaxis.


    Organizational Affiliation

    Research Centre Jülich, Institute of Structural Biology (IBI-2), 52425 Jülich, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SENSORY RHODOPSIN II
A
225Natronomonas pharaonisMutation(s): 0 
Gene Names: sop2 (sopII)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Bacterial and Algal Rhodopsins
Protein: 
Sensory Rhodopsin II (SRII)
Find proteins for P42196 (Natronomonas pharaonis)
Go to UniProtKB:  P42196
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
SENSORY RHODOPSIN II TRANSDUCER
B
60Natronomonas pharaonisMutation(s): 0 
Gene Names: htr2 (htrII)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Bacterial and Algal Rhodopsins
Protein: 
Sensory Rhodopsin II (SRII)
Find proteins for P42259 (Natronomonas pharaonis)
Go to UniProtKB:  P42259
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
RET
Query on RET

Download SDF File 
Download CCD File 
A
RETINAL
C20 H28 O
NCYCYZXNIZJOKI-OVSJKPMPSA-N
 Ligand Interaction
BOG
Query on BOG

Download SDF File 
Download CCD File 
A
B-OCTYLGLUCOSIDE
C14 H28 O6
HEGSGKPQLMEBJL-RKQHYHRCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.226 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 124.300α = 90.00
b = 46.960β = 90.00
c = 53.840γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
MOLREPphasing
SCALAdata scaling
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-10-10
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance