Experiment: 4GKG

Crystal structure of the S-Helix Linker

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
in silico model	Other		Standard 7 amino acid helix

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	5.2	293.15	8-12% PEG1500, 15-20% Isopropanol, 100mM Sodium Citrate, pH 5.2, VAPOR DIFFUSION, SITTING DROP, temperature 293.15K

Crystal Properties
Matthews coefficient	Solvent content
2.35	47.75

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 40.96	α = 90
b = 40.96	β = 90
c = 302.421	γ = 120

Symmetry
Space Group	P 61 2 2

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 QUANTUM 315			M	SINGLE WAVELENGTH
2	1	x-ray	100	CCD	ADSC QUANTUM 315

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I02	0.9795, 1.07210, 1.05830	Diamond	I02
2	SYNCHROTRON	DIAMOND BEAMLINE I03	0.9795, 1.07210, 1.05830	Diamond	I03

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.695	50.613					18052

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	Standard 7 amino acid helix	1.695	34.535	1.1	31108	1605	98.76	0.2383	0.2364	0.2549	0.2759	0.288

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]
12.0102			12.0102		-24.0205

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	17.375
f_angle_d	1.118
f_chiral_restr	0.07
f_bond_d	0.01
f_plane_restr	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	789
Nucleic Acid Atoms
Solvent Atoms	74
Heterogen Atoms	15

Software

Software
Software Name	Purpose
PHASER	phasing
PHENIX	refinement
MOSFLM	data reduction
SCALA	data scaling