5A8E

thermostabilised beta1-adrenoceptor with rationally designed inverse agonist 7-methylcyanopindolol bound


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.218 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.5 of the entry. See complete history


Literature

Pharmacological Analysis and Structure Determination of 7-Methylcyanopindolol-Bound Beta1-Adrenergic Receptor.

Sato, T.Baker, J.Warne, T.Brown, G.Leslie, A.Congreve, M.Tate, C.

(2015) Mol Pharmacol 88: 1024

  • DOI: https://doi.org/10.1124/mol.115.101030
  • Primary Citation of Related Structures:  
    5A8E

  • PubMed Abstract: 

    Comparisons between structures of the β1-adrenergic receptor (AR) bound to either agonists, partial agonists, or weak partial agonists led to the proposal that rotamer changes of Ser(5.46), coupled to a contraction of the binding pocket, are sufficient to increase the probability of receptor activation. (RS)-4-[3-(tert-butylamino)-2-hydroxypropoxy]-1H-indole-2-carbonitrile (cyanopindolol) is a weak partial agonist of β1AR and, based on the hypothesis above, we predicted that the addition of a methyl group to form 4-[(2S)-3-(tert-butylamino)-2-hydroxypropoxy]-7-methyl-1H-indole-2-carbonitrile (7-methylcyanopindolol) would dramatically reduce its efficacy. An eight-step synthesis of 7-methylcyanopindolol was developed and its pharmacology was analyzed. 7-Methylcyanopindolol bound with similar affinity to cyanopindolol to both β1AR and β2AR. As predicted, the efficacy of 7-methylcyanopindolol was reduced significantly compared with cyanopindolol, acting as a very weak partial agonist of turkey β1AR and an inverse agonist of human β2AR. The structure of 7-methylcyanopindolol-bound β1AR was determined to 2.4-Å resolution and found to be virtually identical to the structure of cyanopindolol-bound β1AR. The major differences in the orthosteric binding pocket are that it has expanded by 0.3 Å in 7-methylcyanopindolol-bound β1AR and the hydroxyl group of Ser(5.46) is positioned 0.8 Å further from the ligand, with respect to the position of the Ser(5.46) side chain in cyanopindolol-bound β1AR. Thus, the molecular basis for the reduction in efficacy of 7-methylcyanopindolol compared with cyanopindolol may be regarded as the opposite of the mechanism proposed for the increase in efficacy of agonists compared with antagonists.


  • Organizational Affiliation

    MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge, United Kingdom (T.S., T.W., A.G.W.L., C.G.T.); Heptares Therapeutics Ltd, Welwyn Garden City, United Kingdom (G.A.B., M.C.); School of Life Sciences, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, United Kingdom (J.B.); KEK High Energy Accelerator Research Organization, Institute of Materials Structure Science, Structural Biology Research Center, Tsukuba, Japan (T.S.).


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
BETA1 ADRENERGIC RECEPTOR315Meleagris gallopavoMutation(s): 11 
Membrane Entity: Yes 
UniProt
Find proteins for P07700 (Meleagris gallopavo)
Explore P07700 
Go to UniProtKB:  P07700
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP07700
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
OLC
Query on OLC

Download Ideal Coordinates CCD File 
F [auth A],
G [auth A],
H [auth A],
I [auth A],
J [auth A]
(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate
C21 H40 O4
RZRNAYUHWVFMIP-GDCKJWNLSA-N
XTK
Query on XTK

Download Ideal Coordinates CCD File 
D [auth A]4-[(2S)-3-(tert-butylamino)-2-hydroxypropoxy]-7-methyl-1H-indole-2-carbonitrile
C17 H23 N3 O2
NDCOGBYMSDLXAU-ZDUSSCGKSA-N
MHA
Query on MHA

Download Ideal Coordinates CCD File 
E [auth A](CARBAMOYLMETHYL-CARBOXYMETHYL-AMINO)-ACETIC ACID
C6 H10 N2 O5
QZTKDVCDBIDYMD-UHFFFAOYSA-N
NA
Query on NA

Download Ideal Coordinates CCD File 
B [auth A],
C [auth A]
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.218 
  • Space Group: P 21 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.019α = 90
b = 61.777β = 90
c = 95.561γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-09-30
    Type: Initial release
  • Version 1.1: 2015-11-11
    Changes: Database references
  • Version 1.2: 2019-03-06
    Changes: Data collection, Experimental preparation, Other
  • Version 1.3: 2019-04-03
    Changes: Data collection, Source and taxonomy
  • Version 1.4: 2024-01-10
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description
  • Version 1.5: 2024-10-23
    Changes: Structure summary