4AMI | pdb_00004ami

Turkey beta1 adrenergic receptor with stabilising mutations and bound biased agonist bucindolol

• PDB DOI: https://doi.org/10.2210/pdb4AMI/pdb

• Classification: MEMBRANE PROTEIN
• Organism(s): Meleagris gallopavo
• Expression System: Trichoplusia ni
• Mutation(s): Yes 
• Membrane Protein: Yes  PDBTMMemProtMDmpstruc


• Deposited: 2012-03-11 Released: 2012-05-23 
• Deposition Author(s): Warne, T., Edwards, P.C., Leslie, A.G., Tate, C.G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 
  0.279 (Depositor), 0.272 (DCC) 
• R-Value Work: 
  0.242 (Depositor), 0.241 (DCC) 
• R-Value Observed: 
  0.244 (Depositor) 

Starting Model: experimental

Literature

Crystal Structures of a Stabilized Beta1-Adrenoceptor Bound to the Biased Agonists Bucindolol and Carvedilol

Warne, T., Edwards, P.C., Leslie, A.G., Tate, C.G.

(2012) Structure 20: 841

• PubMed: 22579251 
• DOI: https://doi.org/10.1016/j.str.2012.03.014
• Primary Citation Related Structures: 
  4AMI, 4AMJ


• PubMed Abstract: 
  

  The β(1)-adrenoceptor (β(1)AR) is the site of action of beta blockers used in the treatment of cardiac-related illnesses. Two beta blockers, carvedilol and bucindolol, show distinctive activities compared to other beta blockers and have been proposed as treatments tailored to the Arg/Gly389(8.56) polymorphism of the human β(1)AR. Both carvedilol and bucindolol are classified as biased agonists, because they stimulate G protein-independent signaling, while acting as either inverse or partial agonists of the G protein pathway. We have determined the crystal structures of a thermostabilized avian β(1)AR mutant bound to bucindolol and to carvedilol at 3.2 and 2.3 Å resolution, respectively. In comparison to other beta blockers, bucindolol and carvedilol interact with additional residues, in extracellular loop 2 and transmembrane helix 7, which may promote G protein-independent signaling. The structures also suggest that there may be a structural explanation for the pharmacological differences arising from the Arg/Gly389(8.56) polymorphism.

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Organizational Affiliation: 
• MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 generated by PISA (software)

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 74.51 kDa 
• Atom Count: 4,673 
• Modeled Residue Count: 570 
• Deposited Residue Count: 630 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
BETA-1 ADRENERGIC RECEPTOR	A, B	315	Meleagris gallopavo	Mutation(s): 8  Membrane Entity: Yes
UniProt
Find proteins for P07700 (Meleagris gallopavo) Explore P07700  Go to UniProtKB:  P07700

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
2CV	D [auth A], E [auth B], F [auth B], H [auth B], I [auth B]	HEGA-10 C18 H37 N O7 ITEIKACYSCODFV-ATLSCFEFSA-N
G90	C [auth A], G [auth B]	2-[(2S)-3-[[1-(1H-indol-3-yl)-2-methyl-propan-2-yl]amino]-2-oxidanyl-propoxy]benzenecarbonitrile C22 H25 N3 O2 FBMYKMYQHCBIGU-SFHVURJKSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free:  0.279 (Depositor), 0.272 (DCC) 
• R-Value Work:  0.242 (Depositor), 0.241 (DCC) 
• R-Value Observed: 0.244 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 89.844	α = 90
b = 60.677	β = 110.78
c = 107.818	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-05-23 
Deposition Author(s): Warne, T., Edwards, P.C., Leslie, A.G., Tate, C.G.

Revision History  

• Version 1.0: 2012-05-23
  Type: Initial release
  
• Version 1.1: 2012-05-30
  Changes: Other
• Version 1.2: 2014-12-03
  Changes: Derived calculations
• Version 1.3: 2019-04-03
  Changes: Data collection, Experimental preparation, Other, Source and taxonomy
• Version 1.4: 2023-12-20
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description
• Version 1.5: 2024-11-13
  Changes: Structure summary