3CB2

Crystal structure of human gamma-tubulin bound to GDP

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	7.2	298	top solution: 83 mM HEPES pH 7.2, 1.2M KCl, 20% PEG6000, 1mM GDP; reservoir: 83mM HEPES pH 7.2, 0.6M KCl, 20% PEG6000, 1 mM GDP. Protein was mixed 1:1 or 1:2 with top solution, and equilibrated over the reservoir solution., VAPOR DIFFUSION, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.16	42.97

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 51.744	α = 90
b = 108.755	β = 96.33
c = 83.347	γ = 90

Symmetry
Space Group	P 1 21 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	ADSC QUANTUM 315		2005-12-06	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.1	1.0	ALS	8.2.1

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	2.303	82.76	98.9			40179	38587		-3

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.303	2.38	97

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB 1Z5V stripped of sidechains and ligands	2.303	82.76	38587	38151	2005	98.87	0.18908	0.18908	0.18654	0.23786	RANDOM	25.015

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]
-0.08		-0.07	0.71		-0.65

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.055
r_dihedral_angle_4_deg	17.371
r_dihedral_angle_3_deg	15.388
r_dihedral_angle_1_deg	5.388
r_scangle_it	1.847
r_scbond_it	1.154
r_angle_refined_deg	1.149
r_mcangle_it	0.965
r_mcbond_it	0.565
r_nbtor_refined	0.299
r_nbd_refined	0.19
r_symmetry_vdw_refined	0.19
r_symmetry_hbond_refined	0.154
r_xyhbond_nbd_refined	0.151
r_chiral_restr	0.075
r_bond_refined_d	0.008
r_gen_planes_refined	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6578
Nucleic Acid Atoms
Solvent Atoms	378
Heterogen Atoms	56

Software

Software
Software Name	Purpose
ADSC	data collection
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling