Experiment: 1KNJ

Co-Crystal Structure of 2-C-methyl-D-erythritol 2,4-cyclodiphosphate Synthase (ispF) from E. coli Involved in Mevalonate-Independent Isoprenoid Biosynthesis, Complexed with CMP/MECDP/Mn2+

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	294	(NH4)2SO4, PEG 400, NaI, PIPES, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 294K

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 144.254	α = 90
b = 144.254	β = 90
c = 144.254	γ = 90

Symmetry
Space Group	I 21 3

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	2001-03-26	M	MAD
2	1	x-ray		M	SINGLE WAVELENGTH
1,2	1

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE BM30A	0.9795, 0.9800, 0.9724	ESRF	BM30A
2	SYNCHROTRON	ESRF BEAMLINE ID14-1	0.9340	ESRF	ID14-1

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	2.7	99	99.3	0.04	0.066	19	4.1	11923	11923	1	1	92

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	2.8	2.87	100		0.66	482	4.1	1579

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	2.8	14.71	2	12817	11262	577	87.9	0.286	0.241	0.2297	0.25	0.2445	RANDOM	62.6

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]

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	23.6
c_angle_deg	1.8
c_improper_angle_d	1.52
c_bond_d	0.01

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1166
Nucleic Acid Atoms
Solvent Atoms	22
Heterogen Atoms	38

Software

Software
Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing