2CE2

CRYSTAL STRUCTURE ANALYSIS OF A FLUORESCENT FORM OF H-RAS P21 IN COMPLEX WITH GDP

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.6	291	PROTEIN SOLUTION: 17.22 MG/ML PROTEIN, 64 MM TRIS PH 7.6, 20 MM MAGNESIUM CHLORIDE, 10 MM DTT, 0,1 MM SODIUM AZIDE; RESERVOIR SOLUTION: 64 MM TRIS PH 7.6, 20 MM MAGNESIUM CHLORIDE, 10 MM DTT, 0,1 MM SODIUM AZIDE, 35% PEG 400 MIXTURE OF EQUAL VOLUMES OF PROTEIN AND RESERVOIR SOLUTION, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 291.15K

Crystal Properties
Matthews coefficient	Solvent content
2.1	39.6

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 49	α = 90
b = 53.9	β = 90
c = 116.2	γ = 90

Symmetry
Space Group	C 2 2 21

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	MARRESEARCH		2004-04-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X06SA		SLS	X06SA

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	0.99	50	97	0.05	14.96	4.7		82821

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	0.99	1	96.7		0.6	2.33	4

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 4Q21	1	50	76394	4021	97	0.145	0.144	0.163	RANDOM	8.87

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]
0.53			-0.17		-0.36

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.18
r_dihedral_angle_4_deg	18.923
r_dihedral_angle_3_deg	13.825
r_dihedral_angle_1_deg	7.142
r_scangle_it	2.424
r_scbond_it	1.734
r_angle_refined_deg	1.719
r_mcangle_it	1.042
r_mcbond_it	0.968
r_angle_other_deg	0.802
r_symmetry_vdw_other	0.347
r_symmetry_vdw_refined	0.301
r_nbd_refined	0.241
r_xyhbond_nbd_refined	0.214
r_nbd_other	0.196
r_nbtor_refined	0.188
r_symmetry_hbond_refined	0.188
r_nbtor_other	0.091
r_chiral_restr	0.085
r_bond_refined_d	0.012
r_gen_planes_refined	0.006
r_bond_other_d	0.001
r_gen_planes_other	0.001
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1317
Nucleic Acid Atoms
Solvent Atoms	263
Heterogen Atoms	50

Software

Software
Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling
MOLREP	phasing