Experiment: 3HD7

HELICAL EXTENSION OF THE NEURONAL SNARE COMPLEX INTO THE MEMBRANE, spacegroup C 1 2 1

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1N7S	PDB ENTRY 1N7S

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.3	293	29% PEG 400, 0.1M HEPES, 0.2M lithium sulfate, 0.1M sodium chloride, 0.03M glycylglycylglycine, pH 7.3, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
6.572	81.285

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 265.412	α = 90
b = 135.49	β = 96.34
c = 58.689	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	CCD	MARMOSAIC 225 mm CCD		2008-12-06	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X10SA	0.9791	SLS	X10SA

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	3.4	50	99.8	0.072	15.1	6.9		28140		1.8	108.7

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.4	3.52	100		0.574	1.8	6.9	2332

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)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	SAD	THROUGHOUT	PDB ENTRY 1N7S	3.4	44.203	1.34	27960	1414	98.22	0.2406	0.239	0.241	0.2711	0.2808	RANDOM	174.2

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]
-21.848		-47.578	34.942		-19.913

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	13.911
f_angle_d	0.626
f_chiral_restr	0.042
f_bond_d	0.003
f_plane_restr	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5243
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	79

Software

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