6OY9

Structure of the Rhodopsin-Transducin Complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.9 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structures of the Rhodopsin-Transducin Complex: Insights into G-Protein Activation.

Gao, Y.Hu, H.Ramachandran, S.Erickson, J.W.Cerione, R.A.Skiniotis, G.

(2019) Mol.Cell 75: 781

  • DOI: 10.1016/j.molcel.2019.06.007
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Rhodopsin (Rho), a prototypical G-protein-coupled receptor (GPCR) in vertebrate vision, activates the G-protein transducin (G <sub>T </sub>) by catalyzing GDP-GTP exchange on its α subunit (Gα <sub>T </sub>). To elucidate the determinants of G <sub>T ...

    Rhodopsin (Rho), a prototypical G-protein-coupled receptor (GPCR) in vertebrate vision, activates the G-protein transducin (G T ) by catalyzing GDP-GTP exchange on its α subunit (Gα T ). To elucidate the determinants of G T coupling and activation, we obtained cryo-EM structures of a fully functional, light-activated Rho-G T complex in the presence and absence of a G-protein-stabilizing nanobody. The structures illustrate how G T overcomes its low basal activity by engaging activated Rho in a conformation distinct from other GPCR-G-protein complexes. Moreover, the nanobody-free structures reveal native conformations of G-protein components and capture three distinct conformers showing the Gα T helical domain (αHD) contacting the Gβγ subunits. These findings uncover the molecular underpinnings of G-protein activation by visual rhodopsin and shed new light on the role played by Gβγ during receptor-catalyzed nucleotide exchange.


    Organizational Affiliation

    Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA. Electronic address: yiorgo@stanford.edu.,Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA; Department of Molecular Medicine, Cornell University, Ithaca, NY 14853, USA. Electronic address: rac1@cornell.edu.,Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.,Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Gt-alpha/Gi1-alpha chimera
A
359Bos taurusMutation(s): 0 
Gene Names: GNAT1
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
G Protein-Coupled Receptors (GPCRs)
Protein: 
Rhodopsin
Find proteins for P04695 (Bos taurus)
Go to Gene View: GNAT1
Go to UniProtKB:  P04695
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
B
340Bos taurusMutation(s): 0 
Gene Names: GNB1
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
G Protein-Coupled Receptors (GPCRs)
Protein: 
Rhodopsin
Find proteins for P62871 (Bos taurus)
Go to Gene View: GNB1
Go to UniProtKB:  P62871
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(T) subunit gamma-T1
G
81Bos taurusMutation(s): 0 
Gene Names: GNGT1
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
G Protein-Coupled Receptors (GPCRs)
Protein: 
Rhodopsin
Find proteins for P02698 (Bos taurus)
Go to Gene View: GNGT1
Go to UniProtKB:  P02698
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Rhodopsin
R
348Bos taurusMutation(s): 0 
Gene Names: RHO
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
G Protein-Coupled Receptors (GPCRs)
Protein: 
Rhodopsin
Find proteins for P02699 (Bos taurus)
Go to Gene View: RHO
Go to UniProtKB:  P02699
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
RET
Query on RET

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

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.9 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Cancer InstituteUnited StatesR01 CA201402
National Institutes of Health/National Institute of Neurological Disorders and StrokeUnited StatesR01 NS092695

Revision History 

  • Version 1.0: 2019-07-24
    Type: Initial release
  • Version 1.1: 2019-09-04
    Type: Data collection, Database references