3F7T

Structure of active IspH shows a novel fold with a [3Fe-4S] cluster in the catalytic centre

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	298	1.6 M Potassium Phosphate, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.99	58.87

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 83.47	α = 90
b = 83.47	β = 90
c = 215.45	γ = 120

Symmetry
Space Group	P 32 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	PIXEL	PSI PILATUS 6M	SILICON OPTICS	2007-08-19	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X06SA	1.0,1.7368	SLS	X06SA

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	1.8	40	98.4	0.075		4.5	78209	78209	2	2	35.16

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	1.8	1.91	96		0.351	2.5	3.1	10654

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	SAD	THROUGHOUT	1.8	15	2	2	78122	74151	3898	98.06	0.2	0.201	0.19898	0.23823	RANDOM	35.156

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]
0.34	0.17		0.34		-0.52

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	39.375
r_dihedral_angle_4_deg	20.569
r_dihedral_angle_3_deg	19.619
r_dihedral_angle_1_deg	5.729
r_scangle_it	4.377
r_scbond_it	2.727
r_angle_refined_deg	1.784
r_mcangle_it	1.468
r_mcbond_it	0.946
r_chiral_restr	0.354
r_nbtor_refined	0.31
r_symmetry_vdw_refined	0.275
r_nbd_refined	0.205
r_symmetry_hbond_refined	0.177
r_xyhbond_nbd_refined	0.159
r_bond_refined_d	0.015
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4780
Nucleic Acid Atoms
Solvent Atoms	428
Heterogen Atoms	72

Software

Software
Software Name	Purpose
XDS	data scaling
SHARP	phasing
REFMAC	refinement
XDS	data reduction