2IXS

Structure of SdaI restriction endonuclease

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7.5		1.7-2.0 M (NH4)2SO4, 0.1 M NA-HEPES, PH 7.5

Crystal Properties
Matthews coefficient	Solvent content
3.04	59.2

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 66.901	α = 90
b = 237.991	β = 90
c = 111.404	γ = 90

Symmetry
Space Group	C 2 2 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	MARRESEARCH	MIRRORS	2001-09-09	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID13		ESRF	ID13

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	2	51.2	100	0.1	5.6	7.4		60505		1.4	19.03

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	2.11	100		0.39	1.4	7.5

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	SIRAS	THROUGHOUT	2	30	54406	6068	100	0.182	0.178	0.212	RANDOM	21.09

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]
-0.9			-0.07		0.97

RMS Deviations
Key	Refinement Restraint Deviation
r_scangle_it	6.825
r_dihedral_angle_1_deg	5.583
r_scbond_it	4.716
r_mcangle_it	3.203
r_mcbond_it	2.095
r_angle_refined_deg	1.399
r_angle_other_deg	0.761
r_symmetry_vdw_other	0.324
r_symmetry_vdw_refined	0.319
r_nbd_other	0.271
r_nbd_refined	0.222
r_xyhbond_nbd_refined	0.2
r_symmetry_hbond_refined	0.188
r_chiral_restr	0.102
r_nbtor_other	0.089
r_bond_refined_d	0.011
r_gen_planes_refined	0.005
r_gen_planes_other	0.001
r_bond_other_d
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_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5090
Nucleic Acid Atoms
Solvent Atoms	470
Heterogen Atoms	91

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
MLPHARE	phasing