4GBR

N-Terminal T4 Lysozyme Fusion Facilitates Crystallization of a G Protein Coupled Receptor

• PDB DOI: https://doi.org/10.2210/pdb4GBR/pdb

• Classification: MEMBRANE PROTEIN/HYDROLASE
• Organism(s): Homo sapiens, Tequatrovirus T4
• Mutation(s): Yes 
• Membrane Protein: Yes  OPMPDBTMMemProtMD


• Deposited: 2012-07-27 Released: 2012-10-24 
• Deposition Author(s): Zou, Y., Weis, W.I., Kobilka, B.K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.99 Å
• R-Value Free: 0.282 
• R-Value Work: 0.265 
• R-Value Observed: 0.268 

Literature

N-terminal t4 lysozyme fusion facilitates crystallization of a g protein coupled receptor.

Zou, Y., Weis, W.I., Kobilka, B.K.

(2012) PLoS One 7: e46039-e46039

• PubMed: 23056231 
• DOI: https://doi.org/10.1371/journal.pone.0046039
• Primary Citation of Related Structures:  
  4GBR


• PubMed Abstract: 
  

  A highly crystallizable T4 lysozyme (T4L) was fused to the N-terminus of the β(2) adrenergic receptor (β(2)AR), a G-protein coupled receptor (GPCR) for catecholamines. We demonstrate that the N-terminal fused T4L is sufficiently rigid relative to the receptor to facilitate crystallogenesis without thermostabilizing mutations or the use of a stabilizing antibody, G protein, or protein fused to the 3rd intracellular loop. This approach adds to the protein engineering strategies that enable crystallographic studies of GPCRs alone or in complex with a signaling partner.

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Organizational Affiliation: 

Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, California, United States of America.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 53.73 kDa 
• Atom Count: 3,610 
• Modelled Residue Count: 448 
• Deposited Residue Count: 472 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Beta-2 adrenergic receptor	A	309	Homo sapiens	Mutation(s): 3  Gene Names: ADRB2, ADRB2R, B2AR Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P07550 (Homo sapiens) Explore P07550  Go to UniProtKB:  P07550
PHAROS:  P07550 GTEx:  ENSG00000169252

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Lysozyme	B	163	Tequatrovirus T4	Mutation(s): 0  Gene Names: E EC: 3.2.1.17
UniProt
Find proteins for P00720 (Enterobacteria phage T4) Explore P00720  Go to UniProtKB:  P00720

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CAU	C [auth A]	(2S)-1-(9H-Carbazol-4-yloxy)-3-(isopropylamino)propan-2-ol C18 H22 N2 O2 BQXQGZPYHWWCEB-ZDUSSCGKSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
CAU	BindingDB:  4GBR	Ki: min: 0.03, max: 0.11 (nM) from 2 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.99 Å
• R-Value Free: 0.282 
• R-Value Work: 0.265 
• R-Value Observed: 0.268 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.382	α = 90
b = 71.376	β = 90
c = 161.37	γ = 90

Software Package:

Software Name	Purpose
APEX	data collection
MOLREP	phasing
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-10-24 
Deposition Author(s): Zou, Y., Weis, W.I., Kobilka, B.K.

Revision History  

• Version 1.0: 2012-10-24
  Type: Initial release
  
• Version 1.1: 2024-10-16
  Changes: Data collection, Database references, Derived calculations, Structure summary