2YCX

TURKEY BETA1 ADRENERGIC RECEPTOR WITH STABILISING MUTATIONS AND BOUND ANTAGONIST CYANOPINDOLOL


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.325 
  • R-Value Work: 0.271 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Two Distinct Conformations of Helix 6 Observed in Antagonist-Bound Structures of a Beta-1- Adrenergic Receptor.

Moukhametzianov, R.Warne, T.Edwards, P.C.Serrano-Vega, M.J.Leslie, A.G.Tate, C.G.Schertler, G.F.

(2011) Proc.Natl.Acad.Sci.USA 108: 8228

  • DOI: 10.1073/pnas.1100185108
  • Primary Citation of Related Structures:  2YCW, 2YCY, 2YCZ

  • PubMed Abstract: 
  • The β(1)-adrenergic receptor (β(1)AR) is a G-protein-coupled receptor whose inactive state structure was determined using a thermostabilized mutant (β(1)AR-M23). However, it was not thought to be in a fully inactivated state because there was no salt ...

    The β(1)-adrenergic receptor (β(1)AR) is a G-protein-coupled receptor whose inactive state structure was determined using a thermostabilized mutant (β(1)AR-M23). However, it was not thought to be in a fully inactivated state because there was no salt bridge between Arg139 and Glu285 linking the cytoplasmic ends of transmembrane helices 3 and 6 (the R(3.50) - D/E(6.30) "ionic lock"). Here we compare eight new structures of β(1)AR-M23, determined from crystallographically independent molecules in four different crystals with three different antagonists bound. These structures are all in the inactive R state and show clear electron density for cytoplasmic loop 3 linking transmembrane helices 5 and 6 that had not been seen previously. Despite significantly different crystal packing interactions, there are only two distinct conformations of the cytoplasmic end of helix 6, bent and straight. In the bent conformation, the Arg139-Glu285 salt bridge is present, as in the crystal structure of dark-state rhodopsin. The straight conformation, observed in previously solved structures of β-receptors, results in the ends of helices 3 and 6 being too far apart for the ionic lock to form. In the bent conformation, the R(3.50)-E(6.30) distance is significantly longer than in rhodopsin, suggesting that the interaction is also weaker, which could explain the high basal activity in β(1)AR compared to rhodopsin. Many mutations that increase the constitutive activity of G-protein-coupled receptors are found in the bent region at the cytoplasmic end of helix 6, supporting the idea that this region plays an important role in receptor activation.


    Organizational Affiliation

    Medical Research Council Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BETA-1 ADRENERGIC RECEPTOR
A, B
313Meleagris gallopavoGene Names: ADRB1
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
G Protein-Coupled Receptors (GPCRs)
Protein: 
β1 adrenergic receptor (engineered)
Find proteins for P07700 (Meleagris gallopavo)
Go to Gene View: ADRB1
Go to UniProtKB:  P07700
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
P32
Query on P32

Download SDF File 
Download CCD File 
A, B
4-{[(2S)-3-(tert-butylamino)-2-hydroxypropyl]oxy}-3H-indole-2-carbonitrile
C16 H21 N3 O2
CQEFAUFOQSCRMZ-LBPRGKRZSA-N
 Ligand Interaction
SOG
Query on SOG

Download SDF File 
Download CCD File 
B
2-HYDROXYMETHYL-6-OCTYLSULFANYL-TETRAHYDRO-PYRAN-3,4,5-TRIOL
1-S-OCTYL-BETA-D-THIOGLUCOSIDE
C14 H28 O5 S
CGVLVOOFCGWBCS-RGDJUOJXSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.325 
  • R-Value Work: 0.271 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 150.029α = 90.00
b = 56.434β = 118.33
c = 111.410γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SCALAdata scaling
PHASERphasing
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-06-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance