2KOE

Human cannabinoid receptor 1 - helix 7/8 peptide


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 90 
  • Conformers Submitted: 18 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

NMR solution structure of human cannabinoid receptor-1 helix 7/8 peptide: candidate electrostatic interactions and microdomain formation.

Tyukhtenko, S.Tiburu, E.K.Deshmukh, L.Vinogradova, O.Janero, D.R.Makriyannis, A.

(2009) Biochem.Biophys.Res.Commun. 390: 441-446

  • DOI: 10.1016/j.bbrc.2009.09.053

  • PubMed Abstract: 
  • We report the NMR solution structure of a synthetic 40-mer (T(377)-E(416)) that encompasses human cannabinoid receptor-1 (hCB1) transmembrane helix 7 (TMH7) and helix 8 (H8) [hCB1(TMH7/H8)] in 30% trifluoroethanol/H(2)O. Structural features include, ...

    We report the NMR solution structure of a synthetic 40-mer (T(377)-E(416)) that encompasses human cannabinoid receptor-1 (hCB1) transmembrane helix 7 (TMH7) and helix 8 (H8) [hCB1(TMH7/H8)] in 30% trifluoroethanol/H(2)O. Structural features include, from the peptide's amino terminus, a hydrophobic alpha-helix (TMH7); a loop-like, 11 residue segment featuring a pronounced Pro-kink within the conserved NPxxY motif; a short amphipathic alpha-helix (H8) orthogonal to TMH7 with cationic and hydrophobic amino-acid clusters; and an unstructured C-terminal end. The hCB1(TMH7/H8) NMR solution structure suggests multiple electrostatic amino-acid interactions, including an intrahelical H8 salt bridge and a hydrogen-bond network involving the peptide's loop-like region. Potential cation-pi and cation-phenolic OH interactions between Y(397) in the TMH7 NPxxY motif and R(405) in H8 are identified as candidate structural forces promoting interhelical microdomain formation. This microdomain may function as a flexible molecular hinge during ligand-induced hCB1 conformer transitions.


    Organizational Affiliation

    Department of Chemistry and Chemical Biology, Northeastern University, Center for Drug Discovery, Boston, MA 02115-5000, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
human cannabinoid receptor 1 - helix 7/8 peptide
A
40Homo sapiensGene Names: CNR1 (CNR)
Find proteins for P21554 (Homo sapiens)
Go to Gene View: CNR1
Go to UniProtKB:  P21554
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 90 
  • Conformers Submitted: 18 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2KOE Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-10-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance