Experiment: 8BHG

GABA-A receptor a5 heteromer - a5V2 - Bretazenil

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	4COF	4COF

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP		279	22% PEG 400 0.37M potassium nitrate 0.1 M 2-(N-morpholino)ethanesulfonic acid (MES) pH 6.5

Crystal Properties
Matthews coefficient	Solvent content
2.98	58.68

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 81.14	α = 90
b = 137.637	β = 106.06
c = 113.351	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	298	PIXEL	DECTRIS EIGER2 XE 16M		2017-08-04	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I04	0.9537	Diamond	I04

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	CC (Half)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1	2.39	48.56	91.2	0.184	0.99	10.4	13.3		43371			41.25

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.39	2.7			1.132	0.596

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	4COF	2.39	48.56	1.37	43371	2205	91.2	0.2586	0.2573	0.2579	0.2835	0.2853	58.3

Temperature Factor Modeling
Anisotropic B[1][1]	Anisotropic B[1][2]	Anisotropic B[1][3]	Anisotropic B[2][2]	Anisotropic B[2][3]	Anisotropic B[3][3]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	11.3685
f_angle_d	0.5541
f_chiral_restr	0.0401
f_plane_restr	0.0035
f_bond_d	0.0033

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	13556
Nucleic Acid Atoms
Solvent Atoms	14
Heterogen Atoms	386

Software

Software
Software Name	Purpose
REFMAC	refinement
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling
REFMAC	phasing