2RE2

CRYSTAL STRUCTURE OF A PUTATIVE IRON-MOLYBDENUM COFACTOR (FEMO-CO) DINITROGENASE (TA1041M) FROM THERMOPLASMA ACIDOPHILUM DSM 1728 AT 1.30 A RESOLUTION

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	5.6	277	NANODROP, 19.0% 2-Propanol, 19.0% PEG 4000, 5.0% Glycerol, 0.1M Citric acid pH 5.6, VAPOR DIFFUSION, SITTING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.06	40.23

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 36.381	α = 72.03
b = 36.555	β = 71.81
c = 51.641	γ = 87.25

Symmetry
Space Group	P 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	CCD	MARMOSAIC 300 mm CCD	Adjustable focusing mirrors in K-B geometry	2007-08-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 23-ID-D	0.97945	APS	23-ID-D

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	1.3	46.676	94.8	0.055	0.055	7.4	2		56000

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	1.3	1.33	91.8		0.403	0.403	1.9	1.9	3992

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	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	1.3	46.676	56000	2809	94.84	0.162	0.161	0.179	RANDOM	12.157

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]
0.18	0.19	-0.19	-0.27	0.45	-0.09

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.575
r_dihedral_angle_3_deg	11.647
r_dihedral_angle_1_deg	6.325
r_dihedral_angle_4_deg	5.206
r_scangle_it	4.582
r_scbond_it	3.417
r_angle_refined_deg	1.777
r_mcangle_it	1.737
r_mcbond_it	1.307
r_angle_other_deg	0.991
r_mcbond_other	0.328
r_nbd_refined	0.23
r_symmetry_vdw_refined	0.204
r_nbd_other	0.188
r_nbtor_refined	0.18
r_xyhbond_nbd_refined	0.175
r_symmetry_hbond_refined	0.169
r_symmetry_vdw_other	0.145
r_chiral_restr	0.112
r_nbtor_other	0.091
r_bond_refined_d	0.019
r_gen_planes_refined	0.008
r_gen_planes_other	0.002
r_bond_other_d	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1758
Nucleic Acid Atoms
Solvent Atoms	336
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
PHENIX	refinement
SOLVE	phasing
MolProbity	model building
SCALA	data scaling
PDB_EXTRACT	data extraction
MAR345	data collection
MOSFLM	data reduction