1H58

STRUCTURE OF FERROUS HORSERADISH PEROXIDASE C1A

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5		20% (W/V) PEG 4000, 0.2 M CALCIUM ACETATE, 0.1 M CACODYLATE BUFFER, PH 6.5 THE FERROUS STATE WAS FORMED BY SOAKING THE CRYSTALS FOR 30 MINUTES IN A RESERVOIR SOLUTION SUPPLEMENTED WITH 100 MM SODIUM DITHIONITE AND PEG400 BEFORE FLASH FREEZING

Crystal Properties
Matthews coefficient	Solvent content
2.2	44.1

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 40.266	α = 90
b = 67.091	β = 90
c = 117.523	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	100	IMAGE PLATE	MAR scanner 345 mm plate	MIRRORS	2000-05-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	MAX II BEAMLINE I711		MAX II	I711

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	1.7	25.9	97.7	0.065	16.7	3.4		34886			13.1

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	1.7	1.79	97.7		0.156	6.6

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	OTHER	THROUGHOUT	1.7	25.9	34886	1775	97.1	0.171	0.171	0.2	RANDOM	13.4

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]
0.29			1.21		-1.5

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	21.3
c_scangle_it	2.33
c_scbond_it	1.65
c_angle_deg	1.4
c_mcangle_it	1.33
c_improper_angle_d	1.09
c_mcbond_it	0.94
c_bond_d	0.022
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2369
Nucleic Acid Atoms
Solvent Atoms	423
Heterogen Atoms	49

Software

Software
Software Name	Purpose
CNS	refinement
MOSFLM	data reduction
SCALA	data scaling
CNS	phasing