1SUM

Crystal structure of a hypothetical protein at 2.0 A resolution

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7	298	50mM Hepes, 100mM CaCl2, 25% PEG 400, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2	38.51

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 90.677	α = 90
b = 90.677	β = 90
c = 45.255	γ = 120

Symmetry
Space Group	P 31 2 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		2003-12-22	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 5.0.2	0.9796, 0.9798, 0.9600	ALS	5.0.2

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	2	20	99			14730	14583

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2	2.05	96

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	MAD	THROUGHOUT	2	20	13369	1205	98.95	0.21993	0.2166	0.25489	RANDOM	19.892

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]
-1.98	-0.99		-1.98		2.97

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	5.362
r_scangle_it	3.742
r_scbond_it	2.225
r_mcangle_it	1.351
r_angle_refined_deg	1.196
r_angle_other_deg	0.773
r_mcbond_it	0.734
r_symmetry_hbond_refined	0.499
r_symmetry_vdw_other	0.228
r_nbd_other	0.222
r_nbd_refined	0.206
r_xyhbond_nbd_refined	0.191
r_symmetry_vdw_refined	0.152
r_nbtor_other	0.085
r_chiral_restr	0.071
r_bond_refined_d	0.012
r_gen_planes_refined	0.004
r_bond_other_d	0.002
r_gen_planes_other	0.002
r_dihedral_angle_2_deg
r_dihedral_angle_3_deg
r_dihedral_angle_4_deg
r_nbtor_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1803
Nucleic Acid Atoms
Solvent Atoms	78
Heterogen Atoms	17

Software

Software
Software Name	Purpose
HKL-2000	data collection
SCALEPACK	data scaling
PHENIX	model building
REFMAC	refinement
HKL-2000	data reduction
PHENIX	phasing