3FC3

Crystal structure of the beta-beta-alpha-Me type II restriction endonuclease Hpy99I

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	294	0.1 M MES/Sodium hydroxide pH 6.5, 0.1 M Sodium chloride, 0.1 M Lithium sulfate, 30 % PEG 400, VAPOR DIFFUSION, SITTING DROP, temperature 294K

Crystal Properties
Matthews coefficient	Solvent content
2.5	50.77

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 90.089	α = 90
b = 90.089	β = 90
c = 334.254	γ = 120

Symmetry
Space Group	H 3 2

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		2008-08-08	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	BESSY BEAMLINE 14.1	0.97982	BESSY	14.1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.75	20	96.8	0.066	13.52	3.99	51564	51564			22.6

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.75	1.8	99.1		0.4	4.48	3.95	3874

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	SAD	THROUGHOUT	1.75	19.71	51564	51564	2654	96.86	0.18212	0.18212	0.18084	0.20533	RANDOM	21.338

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]
0.88	0.44		0.88		-1.31

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.996
r_dihedral_angle_4_deg	20.812
r_dihedral_angle_3_deg	13.154
r_dihedral_angle_1_deg	5.633
r_angle_other_deg	3.917
r_scangle_it	2.662
r_scbond_it	1.745
r_mcangle_it	1.263
r_angle_refined_deg	1.224
r_mcbond_it	0.687
r_symmetry_vdw_other	0.304
r_symmetry_vdw_refined	0.296
r_nbd_other	0.238
r_nbd_refined	0.205
r_nbtor_refined	0.187
r_symmetry_hbond_refined	0.157
r_xyhbond_nbd_refined	0.135
r_metal_ion_refined	0.111
r_nbtor_other	0.106
r_chiral_restr	0.077
r_symmetry_metal_ion_refined	0.066
r_bond_refined_d	0.01
r_gen_planes_refined	0.009
r_gen_planes_other	0.007
r_bond_other_d
r_xyhbond_nbd_other
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_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	2974
Nucleic Acid Atoms	363
Solvent Atoms	394
Heterogen Atoms	20

Software

Software
Software Name	Purpose
MxCuBE	data collection
SHELXCD	phasing
SHELXD	phasing
SHELXE	model building
ARP/wARP	model building
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling