3O8I

Structure of 14-3-3 isoform sigma in complex with a C-Raf1 peptide and a stabilizing small molecule fragment

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	277.15	0.095M HEPES Na, 26.6%(v/v) PEG400, 0.19M CaCl2, 5%(v/v) Glycerol, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 277.15K

Crystal Properties
Matthews coefficient	Solvent content
2.77	55.61

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 83.31	α = 90
b = 114.86	β = 90
c = 64.93	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	MARMOSAIC 225 mm CCD		2009-08-11	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X10SA	0.99986	SLS	X10SA

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	2	20	99.5	0.072	14.37			21324		-3	33.855

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2	2.3	99.7		0.349	0.4	4.1

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	3IQU	2	19.58	21324	1067	100	0.1877	0.1851	0.2388	RANDOM	29.5154

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]
2.33			-1.65		-0.69

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.201
r_dihedral_angle_4_deg	19.725
r_dihedral_angle_3_deg	14.754
r_scangle_it	6.263
r_dihedral_angle_1_deg	5.461
r_scbond_it	4.058
r_rigid_bond_restr	2.756
r_mcangle_it	2.593
r_angle_refined_deg	1.801
r_mcbond_it	1.586

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.201
r_dihedral_angle_4_deg	19.725
r_dihedral_angle_3_deg	14.754
r_scangle_it	6.263
r_dihedral_angle_1_deg	5.461
r_scbond_it	4.058
r_rigid_bond_restr	2.756
r_mcangle_it	2.593
r_angle_refined_deg	1.801
r_mcbond_it	1.586
r_chiral_restr	0.134
r_bond_refined_d	0.029
r_gen_planes_refined	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1785
Nucleic Acid Atoms
Solvent Atoms	163
Heterogen Atoms	11

Software

Software
Software Name	Purpose
XSCALE	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
ProDC	data collection
XDS	data reduction

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.