3BIT

Crystal structure of yeast Spt16 N-terminal Domain

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	4.5	278	35% PEG 300, 200mM NaCl, 100mM Sodium Acetate, pH 4.5, vapor diffusion, temperature 278K

Crystal Properties
Matthews coefficient	Solvent content
2.45	49.78

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 40.683	α = 90
b = 144.635	β = 101.44
c = 88.513	γ = 90

Symmetry
Space Group	P 1 21 1

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 4		2004-06-05	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X26C	0.97791	NSLS	X26C

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	1.9	40	94	0.097	8.1		78683	73962		2

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	1.9	1.97	70		0.455			5482

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (All)	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		THROUGHOUT	1.9	39.88	78683	73959	3741	93.81	0.17	0.167	0.224	RANDOM	21.647

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]
1.11		0.26	-0.79		-0.22

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	39.723
r_dihedral_angle_4_deg	18.408
r_dihedral_angle_3_deg	15.384
r_dihedral_angle_1_deg	5.988
r_scangle_it	3.06
r_scbond_it	1.979
r_angle_refined_deg	1.377
r_mcangle_it	1.044
r_mcbond_it	0.582
r_nbtor_refined	0.304
r_symmetry_vdw_refined	0.221
r_nbd_refined	0.205
r_symmetry_hbond_refined	0.159
r_xyhbond_nbd_refined	0.153
r_metal_ion_refined	0.11
r_chiral_restr	0.099
r_bond_refined_d	0.014
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7144
Nucleic Acid Atoms
Solvent Atoms	1034
Heterogen Atoms	22

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
ADSC	data collection
HKL-2000	data reduction
PHASES	phasing