5OCT

Discovery of small molecules binding to KRAS via high affinity antibody fragment competition method.

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP		291	8-15% w/v PEG 3350 and 0.2 M lithium citrate

Crystal Properties
Matthews coefficient	Solvent content
2.47	50.18

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 63.49	α = 90
b = 118.45	β = 90
c = 155.36	γ = 90

Symmetry
Space Group	P 21 21 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	PIXEL	DECTRIS PILATUS3 6M		2015-05-25	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I02	0.9795	Diamond	I02

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rpim I (All)	CC (Half)	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	2.07	41.72	100	0.2	0.067	0.998	12.2	12.9		72162

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	3GFT	2.07	41.72	68511	3573	99.84	0.18936	0.18787	0.21843	RANDOM	42.632

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]
-1.05			1.99		-0.94

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	42.602
r_dihedral_angle_4_deg	17.237
r_dihedral_angle_3_deg	14.777
r_long_range_B_refined	10.931
r_long_range_B_other	10.931
r_scangle_other	8.695
r_dihedral_angle_1_deg	6.109
r_scbond_it	5.704
r_scbond_other	5.704
r_mcangle_it	5.52
r_mcangle_other	5.52
r_mcbond_it	3.86
r_mcbond_other	3.859
r_angle_refined_deg	1.802
r_angle_other_deg	1.031
r_chiral_restr	0.101
r_bond_refined_d	0.016
r_gen_planes_refined	0.007
r_bond_other_d	0.003
r_gen_planes_other	0.002
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_scangle_it
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7984
Nucleic Acid Atoms
Solvent Atoms	370
Heterogen Atoms	326

Software

Software
Software Name	Purpose
REFMAC	refinement
xia2	data reduction
xia2	data scaling
Coot	model building