3BIQ

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	298	25% Pentaerythritol Ethoxylate (15/4 EO/OH), 100mM Sodium Acetate, pH 4.5, vapor diffusion, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.17	43.37

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 60.285	α = 90
b = 50.806	β = 107.03
c = 79.214	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		2003-09-04	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X26C	1.000	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	1.73	50	71.8	0.102	15.5		46662	33504		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	1.73	1.81	12.4		0.326			572

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION		THROUGHOUT	1.73	40.52	46662	31872	1724	69.36	0.166	0.166	0.163	0.213	RANDOM	28.234

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]
-0.67		-0.54	-0.24		0.59

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.015
r_dihedral_angle_4_deg	16.775
r_dihedral_angle_3_deg	15.135
r_dihedral_angle_1_deg	5.565
r_scangle_it	2.746
r_scbond_it	1.805
r_angle_refined_deg	1.314
r_mcangle_it	1.008
r_mcbond_it	0.615
r_nbtor_refined	0.306
r_symmetry_vdw_refined	0.205
r_nbd_refined	0.202
r_symmetry_hbond_refined	0.172
r_xyhbond_nbd_refined	0.145
r_chiral_restr	0.097
r_bond_refined_d	0.012
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3559
Nucleic Acid Atoms
Solvent Atoms	393
Heterogen Atoms	18

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
ADSC	data collection
PHASER	phasing