1LVZ

METARHODOPSIN II BOUND STRUCTURE OF C-TERMINAL PEPTIDE OF ALPHA-SUBUNIT OF TRANSDUCIN


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and orientation of a G protein fragment in the receptor bound state from residual dipolar couplings.

Koenig, B.W.Kontaxis, G.Mitchell, D.C.Louis, J.M.Litman, B.J.Bax, A.

(2002) J.Mol.Biol. 322: 441-461


  • PubMed Abstract: 
  • Residual dipolar couplings for a ligand that is in fast exchange between a free state and a state where it is bound to a macroscopically ordered membrane protein carry precise information on the structure and orientation of the bound ligand. The coup ...

    Residual dipolar couplings for a ligand that is in fast exchange between a free state and a state where it is bound to a macroscopically ordered membrane protein carry precise information on the structure and orientation of the bound ligand. The couplings originate in the bound state but can be detected on the free ligand using standard high resolution NMR. This approach is used to study an analog of the C-terminal undecapeptide of the alpha-subunit of the heterotrimeric G protein transducin when bound to photo-activated rhodopsin. Rhodopsin is the major constituent of disk-shaped membrane vesicles from rod outer segments of bovine retinas, which align spontaneously in the NMR magnet. Photo-activation of rhodopsin triggers transient binding of the peptide, resulting in measurable dipolar contributions to 1J(NH) and 1J(CH) splittings. These dipolar couplings report on the time-averaged orientation of bond vectors in the bound peptide relative to the magnetic field, i.e. relative to the membrane normal. Approximate distance restraints of the bound conformation were derived from transferred NOEs, as measured from the difference of NOESY spectra recorded prior to and after photo-activation. The N-terminal eight residues of the bound undecapeptide adopt a near-ideal alpha-helical conformation. The helix is terminated by an alpha(L) type C-cap, with Gly9 at the C' position in the center of the reverse turn. The angle between the helix axis and the membrane normal is 40 degrees (+/-4) degrees. Peptide protons that make close contact with the receptor are identified by analysis of the NOESY cross-relaxation pattern and include the hydrophobic C terminus of the peptide.


    Organizational Affiliation

    Structural Biology Institute, IBI-2, Research Center Jülich, D-52425 Jülich, Germany. b.koenig@fz-juelich.de




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(T), alpha-1 subunit
A
11Bos taurusMutation(s): 2 
Gene Names: GNAT1
Find proteins for P04695 (Bos taurus)
Go to Gene View: GNAT1
Go to UniProtKB:  P04695
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 1LVZ Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-09-11
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance