2QC1

Crystal structure of the extracellular domain of the nicotinic acetylcholine receptor 1 subunit bound to alpha-bungarotoxin at 1.9 A resolution

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	ALS BEAMLINE 8.2.1
Synchrotron site	ALS
Beamline	8.2.1
Temperature [K]	100
Detector technology	CCD
Collection date	2006-02-17
Detector	ADSC QUANTUM 4
Wavelength(s)	1.0
Spacegroup name	P 21 21 21
Unit cell lengths	42.498, 85.680, 95.150
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	41.590 - 1.940
Rwork	0.214
R-free	0.23300
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	2byp
RMSD bond length	0.008
RMSD bond angle	1.614
Data reduction software	HKL-2000
Data scaling software	HKL-2000
Phasing software	CNS
Refinement software	CNS

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	50.000	2.060
High resolution limit [Å]	1.940	1.940
Number of reflections	23030
<I/σ(I)>	20	4
Completeness [%]	87.1	67.4
Redundancy	16	5

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, HANGING DROP	6	277	0.1M Na citrate, 18% 2-propanol, 8% PEG 4000, pH 6.0, VAPOR DIFFUSION, HANGING DROP, temperature 277K