1H4D

Biochemical and Structural Analysis of the Molybdenum Cofactor Biosynthesis protein MobA

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.5	277	HANGING DROP VAPOUR DIFFUSION. PROTEIN AT CONCENTRATION 12 MG/ML WAS MIXED WITH AN EQUAL VOLUME OF WELL SOLUTION CONSISTING OF 20% (V/V) ISOPROPANO 2% (W/V) PEG 1500, IN 100 MM CITRIC ACID BROUGHT TO PH 5.5 WITH NAOH. CRYSTALS GROW AT 4 DEG. C AND TAKE UP TO 8 WEEK TO REACH FULL SIZE.

Crystal Properties
Matthews coefficient	Solvent content
1.93	36

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 76.56	α = 90
b = 41.962	β = 90
c = 54.319	γ = 90

Symmetry
Space Group	P 21 21 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		2001-03-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SRS BEAMLINE PX9.5		SRS	PX9.5

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	1.75	40	98.6	0.068	21.1	4.9		18116		-3

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	1.75	1.78	96.7		0.234	3.8

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1E5K	1.74	54.23	17221	894	98.1	0.175	0.219	RANDOM	15.72

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]
-0.08			0.34		-0.26

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	7.741
r_scangle_it	4.638
r_scbond_it	3.042
r_mcangle_it	2.116
r_angle_refined_deg	1.913
r_mcbond_it	1.213
r_symmetry_hbond_refined	0.347
r_nbd_refined	0.227
r_symmetry_vdw_refined	0.2
r_xyhbond_nbd_refined	0.158
r_chiral_restr	0.135
r_bond_refined_d	0.021
r_gen_planes_refined	0.009
r_bond_other_d
r_angle_other_deg
r_dihedral_angle_2_deg
r_dihedral_angle_3_deg
r_dihedral_angle_4_deg
r_gen_planes_other
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_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	1436
Nucleic Acid Atoms
Solvent Atoms	185
Heterogen Atoms	27

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling