4HP4

Crystal structure of PAS domain from the fruit-fly ELK potassium channel

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	ESRF BEAMLINE ID14-1
Synchrotron site	ESRF
Beamline	ID14-1
Temperature [K]	100
Detector technology	CCD
Collection date	2009-12-19
Detector	ADSC QUANTUM 210
Wavelength(s)	0.933
Spacegroup name	P 41 3 2
Unit cell lengths	150.306, 150.306, 150.306
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	53.141 - 2.000
R-factor	0.1736
Rwork	0.173
R-free	0.19120
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	1byw
RMSD bond length	0.003
RMSD bond angle	0.742
Data reduction software	MOSFLM
Data scaling software	SCALA (3.2.25)
Phasing software	PHASER
Refinement software	REFMAC

Data quality characteristics

	Overall	Inner shell	Outer shell
Low resolution limit [Å]	53.149	61.362	2.110
High resolution limit [Å]	2.000	6.320	2.000
Rmerge	0.089	0.051	0.550
Number of reflections	39431
<I/σ(I)>	19.5	8.4	1.4
Completeness [%]	99.5	95.3	99.4
Redundancy	14.7	21.3	7

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, SITTING DROP	6.5	277	30% PEG5000, 0.35M ammonium sulfate, 0.1M MES, pH 6.5, vapor diffusion, sitting drop, temperature 277K