4MS4

Crystal structure of the extracellular domain of human GABA(B) receptor bound to the agonist baclofen

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	APS BEAMLINE 24-ID-C
Synchrotron site	APS
Beamline	24-ID-C
Temperature [K]	100
Detector technology	CCD
Collection date	2011-08-16
Detector	ADSC QUANTUM 315
Wavelength(s)	0.97949
Spacegroup name	P 21 21 2
Unit cell lengths	115.383, 140.390, 59.501
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	27.820 - 1.900
R-factor	0.1912
Rwork	0.190
R-free	0.21570
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	4mqe
RMSD bond length	0.010
RMSD bond angle	1.020
Data reduction software	DENZO
Data scaling software	SCALEPACK
Phasing software	PHASER
Refinement software	BUSTER-TNT

Data quality characteristics

	Overall	Inner shell	Outer shell
Low resolution limit [Å]	50.000	50.000	1.930
High resolution limit [Å]	1.900	5.160	1.900
Rmerge	0.073	0.025	0.678
Number of reflections	75350
<I/σ(I)>	10.2
Completeness [%]	98.2	98.9	96.7
Redundancy	7.1	7	7

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, HANGING DROP	5.2	293	20% PEG2000, 15% glycerol, 0.2 M ammonium chloride, 0.1 M sodium cacodylate, pH 5.2, VAPOR DIFFUSION, HANGING DROP, temperature 293K