2EQB

Crystal structure of the Rab GTPase Sec4p, the Sec2p GEF domain, and phosphate complex

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.2	293	150mM Dipotassium hydrogenphosphate, 17% PEG 3350, 150mM dimethyl(2-hydroxyethyl)ammonium propane sulfonate, pH 7.2, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
5	75.2

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 116.581	α = 90
b = 117.422	β = 90
c = 123.332	γ = 90

Symmetry
Space Group	I 2 2 2

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	ADSC QUANTUM 315		2006-12-12	M	SINGLE WAVELENGTH
2	1	x-ray	100	CCD	ADSC QUANTUM 315		2006-12-21	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SPRING-8 BEAMLINE BL41XU	1.0000	SPring-8	BL41XU
2	SYNCHROTRON	PHOTON FACTORY BEAMLINE BL-5A	0.97956, 0.97973	Photon Factory	BL-5A

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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
1,2	2.7	50		12.7		23619	23619			27.6

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)
	2.7	2.75			0.288	2.07

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	2.7	48.08	23220	1121	98.2	0.273	0.273	0.298	RANDOM	77.7

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]
-20.9			40.93		-20.02

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	21.2
c_scangle_it	5.91
c_mcangle_it	4.92
c_scbond_it	3.65
c_mcbond_it	2.83
c_angle_deg	1.5
c_improper_angle_d	0.75
c_bond_d	0.008
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2899
Nucleic Acid Atoms
Solvent Atoms	114
Heterogen Atoms	10

Software

Software
Software Name	Purpose
CNS	refinement
ADSC	data collection
DENZO	data reduction
SCALEPACK	data scaling
SHARP	phasing