6FDR

7-FE FERREDOXIN FROM AZOTOBACTER VINELANDII AT 100K, NA DITHIONITE REDUCED AT PH 8.5, RESOLUTION 1.4 A

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7.8		PROTEIN CRYSTALLIZED FROM 60% SAT. AMMONIUM SULFATE, 0.4M TRIS-HCL, PH 7.8. CRYSTALS WERE SOAKED IN 5MM NA DITHIONITE, 0.15M TRIS/HCL PH 8.5 BEFORE DATA COLLECTION

Crystal Properties
Matthews coefficient	Solvent content
2.91	57.73

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 54.74	α = 90
b = 54.74	β = 90
c = 93.77	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	100	AREA DETECTOR	SIEMENS HI-STAR		1998-09-26	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	MACSCIENCE

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.4	100	82.8	0.15	13.6	4.56		24027

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.4	1.5	55.3		0.44	0.9

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	OTHER	PDB ENTRY 6FD1	1.4	100	22762		82.8	0.175

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]

Coordinate Error
Structure Solution Method	Refinement High Resolution	Refinement Low Resolution
1	776	1000

RMS Deviations
Key	Refinement Restraint Deviation
s_from_restr_planes	0.379
s_approx_iso_adps	0.133
s_zero_chiral_vol	0.122
s_non_zero_chiral_vol	0.118
s_similar_adp_cmpnt	0.106
s_angle_d	0.025
s_rigid_bond_adp_cmpnt	0.014
s_anti_bump_dis_restr	0.012
s_bond_d	0.008
s_similar_dist

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1617
Nucleic Acid Atoms
Solvent Atoms	145
Heterogen Atoms	15

Software

Software
Software Name	Purpose
TRIVIAL	model building
SHELXL	refinement
X-GEN	data reduction
X-GEN	data scaling
TRIVIAL	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 R01GM133198.