2E1N

Crystal structure of the Cyanobacterium circadian clock modifier Pex

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.2	293	0.5-1.0M Li2SO4, 0.1M sodium acetate buffer (pH 3.8~4.6), 50mM magnesium acetate, pH 4.2, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.11	41.8

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 57.153	α = 90
b = 61.539	β = 90
c = 75.676	γ = 90

Symmetry
Space Group	P 21 21 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	ADSC QUANTUM 315	undulator	2006-01-25	M	MAD
2	1	x-ray	100	CCD	ADSC QUANTUM 315	undulator	2006-01-25	M	SINGLE WAVELENGTH
1,2	1

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PHOTON FACTORY BEAMLINE BL-5A	0.97931, 0.97820, 0.96408, 0.98319	Photon Factory	BL-5A
2	SYNCHROTRON	PHOTON FACTORY BEAMLINE BL-5A	1	Photon Factory	BL-5A

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym 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	1.8	32.2	98.2	0.058	0.058			24920	24505	1	1

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)
1,2	1.8	1.86	85.3		0.424

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Cut-off Sigma (F)	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	MAD	THROUGHOUT	1.8	32.2	1	1	24920	23649	1269	98.2	0.2356	0.19789	0.19602	0.236	RANDOM	33.343

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]
0.63			-1.14		0.51

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.66
r_dihedral_angle_4_deg	15.157
r_dihedral_angle_3_deg	14.876
r_dihedral_angle_1_deg	5.084
r_scangle_it	4.733
r_scbond_it	3.742
r_mcbond_it	1.916
r_mcangle_it	1.835
r_angle_refined_deg	1.461
r_angle_other_deg	0.871
r_symmetry_vdw_other	0.321
r_mcbond_other	0.258
r_nbd_refined	0.228
r_symmetry_vdw_refined	0.208
r_nbd_other	0.2
r_xyhbond_nbd_refined	0.199
r_nbtor_refined	0.195
r_symmetry_hbond_refined	0.18
r_chiral_restr	0.091
r_nbtor_other	0.086
r_bond_refined_d	0.015
r_gen_planes_refined	0.007
r_bond_other_d	0.006
r_gen_planes_other	0.001
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1898
Nucleic Acid Atoms
Solvent Atoms	144
Heterogen Atoms	10

Software

Software
Software Name	Purpose
REFMAC	refinement
ADSC	data collection
HKL-2000	data reduction
HKL-2000	data scaling
SOLVE	phasing