Experiment: 3S3X

Structure of chicken acid-sensing ion channel 1 AT 3.0 A resolution in complex with psalmotoxin

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3S3W

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	5.5	286	0.1M sodium acetate pH 5.5, 3 % Glycerol, 3% 1,6-hexanediol, 11 % PEG 6000, VAPOR DIFFUSION, SITTING DROP, temperature 286K

Crystal Properties
Matthews coefficient	Solvent content
4.11	70.06

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 232.396	α = 90
b = 109.442	β = 119.81
c = 127.269	γ = 90

Symmetry
Space Group	C 1 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	PIXEL	DECTRIS PILATUS 6M		2010-08-17	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X10SA	1	SLS	X10SA

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym I (Observed)	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	3	49.03	99.7	0.1083	0.1083	8.51	3.38		55842

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3	3.1	99.8		0.725	0.725	1.06	3.53

Refinement

Statistics
Diffraction ID	Structure Solution 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)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	3S3W	2.99	29.915	1.34	55678	2823	99.31	0.2192	0.2176	0.2199	0.2486	0.2489	random

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]
24.7524		-25.6394	-13.5665		-11.186

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	11.284
f_angle_d	0.676
f_chiral_restr	0.04
f_bond_d	0.004
f_plane_restr	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	10413
Nucleic Acid Atoms
Solvent Atoms	14
Heterogen Atoms	92

Software

Software
Software Name	Purpose
PHASER	phasing
PHENIX	refinement
XDS	data reduction
SCALA	data scaling