4RSG | pdb_00004rsg

Neutron crystal structure of Ras bound to the GTP analogue GppNHp

NEUTRON DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	291	18mg/mL protein, 0.2M calcium acetate, 20% PEG 3350, 20mM HEPES, 50mM NaCl, 20mM MgCl2, 0.1% N-octy-B-D-glucopyranoside, pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 291K

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 40.084	α = 90
b = 40.084	β = 90
c = 160.785	γ = 120

Symmetry
Space Group	P 32 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	neutron	293	IMAGE PLATE	FUJI		2014-05-09	L	LAUE

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	NUCLEAR REACTOR	ORNL High Flux Isotope Reactor BEAMLINE CG4D	3.3-4.5	ORNL High Flux Isotope Reactor	CG4D

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	1.899	17.01	82.1	0.262	0.262	5.6	6.2	9888	9888			8.61

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.899	2	60.4		0.379	0.379	1.9	3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Free (Depositor)	Mean Isotropic B
NEUTRON DIFFRACTION	MOLECULAR REPLACEMENT	1.907	17.009	1.41	9882	9882	1003	79.61	0.253	0.2492	0.2875	16.4865

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]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	18.327
f_angle_d	0.872
f_chiral_restr	0.036
f_bond_d	0.014
f_plane_restr	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1207
Nucleic Acid Atoms
Solvent Atoms	75
Heterogen Atoms	33

Software

Software
Software Name	Purpose
SCALA	data scaling
PHENIX	refinement
PDB_EXTRACT	data extraction
Quasi-Laue	data collection
LAUEGEN	data reduction
PHENIX	phasing