4AOP

SULFITE REDUCTASE HEMOPROTEIN PARTIALLY PHOTOREDUCED WITH PROFLAVINE EDTA, PHOSPHATE PARTIALLY BOUND

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7.7		OXIDIZED SIRHP CRYSTALS WERE PHOTOREDUCED WITH 0.75 MM PROFLAVINE, 10 MM EDTA IN THE PRESENCE OF PHOSPHATE, FOR 20 MIN. ENZYME IS IN A MIXTURE OF THREE OXIDATION STATES. PHOSPHATE (RESIDUE 585) AND WATER 384 COORDINATE THE SIROHEME IRON, EACH IN PARTIAL OCCUPANCY., pH 7.7

Crystal Properties
Matthews coefficient	Solvent content
2.13	40

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 69.8	α = 90
b = 77.4	β = 90
c = 87.8	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	277	IMAGE PLATE	MARRESEARCH		1995-03-02	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL7-1		SSRL	BL7-1

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	1.8	10	96.4	0.07	19	2.8		41756

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	1.8	1.86	99.9		0.289	4.9

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB ENTRY 1AOP	1.8	10	2	41041		92.3	0.175	0.175		28.6

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]
-4.45			5.01		-0.56

RMS Deviations
Key	Refinement Restraint Deviation
x_angle_deg	1.6
x_bond_d	0.01
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d
x_improper_angle_d_na
x_improper_angle_d_prot
x_mcbond_it
x_mcangle_it
x_scbond_it
x_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3563
Nucleic Acid Atoms
Solvent Atoms	384
Heterogen Atoms	77

Software

Software
Software Name	Purpose
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling