Experiment: 1F37

STRUCTURE OF A THIOREDOXIN-LIKE [2FE-2S] FERREDOXIN FROM AQUIFEX AEOLICUS

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8	295	ammonium sulfate, p-dioxane, 2-(N-morpholino)-ethane sulfonic acid, pH 6.5, pH 8.0, VAPOR DIFFUSION, SITTING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.43	49.4

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 68.079	α = 90
b = 68.079	β = 90
c = 102.519	γ = 90

Symmetry
Space Group	P 41 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	90	CCD	ADSC QUANTUM 4		1999-06-26	M	SINGLE WAVELENGTH
2	1	90	CCD	ADSC QUANTUM 4		1999-06-26
3	1	90	CCD	ADSC QUANTUM 4		1999-06-26
4	1	90	CCD	ADSC QUANTUM 4		1999-06-26

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-2		SSRL	BL9-2
2	SYNCHROTRON	SSRL BEAMLINE BL9-2		SSRL	BL9-2
3	SYNCHROTRON	SSRL BEAMLINE BL9-2		SSRL	BL9-2
4	SYNCHROTRON	SSRL BEAMLINE BL9-2		SSRL	BL9-2

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	2.3	50	99.3	0.055	24.8	6.7	11218	11218			52.3

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	2.3	2.34	99.8		0.277		6.7	550

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work (Depositor)	R-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION		2.3	500	20358	20358	1506	99.5	0.228	0.228	0.225	0.27	Approximately 7.5% of the data were randomly selected for the R-free test set.

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_angle_deg	1.53
c_bond_d	0.01

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1692
Nucleic Acid Atoms
Solvent Atoms	70
Heterogen Atoms	20

Software

Software
Software Name	Purpose
MLPHARE	phasing
CNS	refinement
Blu-Ice	data collection
SCALEPACK	data scaling