4O9K

Crystal structure of the CBS pair of a putative D-arabinose 5-phosphate isomerase from Methylococcus capsulatus in complex with CMP-Kdo

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	289	0.2 ul of 9 mg/ml protein in 20 mM HEPES pH 7.5, 150 mM NaCl, 10% Glycerol, 0.1% Sodium Azide and 0.5 mM TCEP were mixed with 0.2 ul of the MCSG-II condition #27 (0.2 M Ammomium Acetate, 0.1 M HEPES:NaOH pH 7.5, 25% (w/v) PEG 3350) and equilibrated against 1.5 M NaCl solution in QIAGEN EasyXtal 15-Well Tool plate. Before crystallization protein was incubated with 1/50 v/v of 2 mg/ml chymotrypsin solution at 289 K for 3 hours, VAPOR DIFFUSION, SITTING DROP

Crystal Properties
Matthews coefficient	Solvent content
1.87	34.06

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 45.151	α = 90
b = 62.408	β = 90
c = 75.664	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	MARMOSAIC 225 mm CCD	Beryllium Lenses	2013-11-11	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 21-ID-F	0.97872	APS	21-ID-F

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	1.85	50	98.6	0.146	0.146	12.5	5.7	18722	18460		-3	15.6

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.85	1.88	99.2		0.703	0.703	1.8	5.4	922

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	SAD	THROUGHOUT	1.85	48.14	18806	18430	949	98.17	0.1505	0.1483	0.1889	RANDOM	18.951

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]
1.03			-0.13		-0.9

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.81
r_dihedral_angle_4_deg	13.608
r_dihedral_angle_3_deg	12.003
r_dihedral_angle_1_deg	5.89
r_angle_refined_deg	1.835
r_angle_other_deg	1.289
r_mcangle_it	1.169
r_mcbond_it	0.716
r_mcbond_other	0.714
r_chiral_restr	0.096

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.81
r_dihedral_angle_4_deg	13.608
r_dihedral_angle_3_deg	12.003
r_dihedral_angle_1_deg	5.89
r_angle_refined_deg	1.835
r_angle_other_deg	1.289
r_mcangle_it	1.169
r_mcbond_it	0.716
r_mcbond_other	0.714
r_chiral_restr	0.096
r_bond_refined_d	0.016
r_gen_planes_refined	0.009
r_bond_other_d	0.006
r_gen_planes_other	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1925
Nucleic Acid Atoms
Solvent Atoms	207
Heterogen Atoms	78

Software

Software
Software Name	Purpose
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-3000	data collection
HKL-3000	data reduction
HKL-3000	data scaling
SHELX	phasing
MLPHARE	phasing
HKL-3000	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.