2CL7

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

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	5P21	PDB ENTRY 5P21

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.2	291.15	PROTEIN SOLUTION: 13.35 MG/ML PROTEIN, 64 MM TRIS PH 7.6, 20 MM MAGNESIUM CHLORIDE, 10 MM DTT, 0,1 MM SODIUM AZIDE; RESERVOIR SOLUTION: 100 MM HEPES PH 7.2, 200 MM MAGNESIUM ACETATE, 16% PEG 8000 (FRESHLY PREPARED) MIXTURE OF EQUAL VOLUMES OF PROTEIN AND RESERVOIR SOLUTION, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 291.15K

Crystal Properties
Matthews coefficient	Solvent content
2.2	43.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 69.28	α = 90
b = 69.28	β = 90
c = 35.02	γ = 90

Symmetry
Space Group	P 41

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 CCD		2004-12-17	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-4		ESRF	ID14-4

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	1.25	69.34	99.9	0.04	20.7	6.13		46204

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	1.25	1.3	99.9		0.52	3.5	5.28

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 5P21	1.25	69.34	43911	2293	99.9	0.149	0.148	0.17	RANDOM	8.69

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]
-1.18			-1.18		2.36

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.649
r_dihedral_angle_4_deg	17.949
r_dihedral_angle_3_deg	14.047
r_dihedral_angle_1_deg	6.526
r_scangle_it	2.819
r_scbond_it	2.064
r_angle_refined_deg	1.742
r_mcangle_it	1.336
r_mcbond_it	1.21
r_angle_other_deg	0.806
r_symmetry_hbond_refined	0.477
r_symmetry_vdw_refined	0.384
r_symmetry_vdw_other	0.304
r_xyhbond_nbd_refined	0.254
r_nbd_refined	0.234
r_nbd_other	0.188
r_nbtor_refined	0.188
r_chiral_restr	0.089
r_nbtor_other	0.088
r_bond_refined_d	0.015
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	208
Heterogen Atoms	55

Software

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