2R50

The crystal structure of nonsymbiotic corn hemoglobin 1

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.6	277	0.1M Sodium Acetate, 0.2M Ammonium Sulfate, 20% PEG MME 1900, pH 5.6, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.45	49.76

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 50.754	α = 90
b = 89.734	β = 90
c = 157.424	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	RIGAKU RAXIS IV	Osmic	2004-01-23	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200	1.54

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	2.2	80	99.6	0.05	19.3	6.67		35371			38.8

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)
	2.2	2.26	97.6		0.24	6.4	5.24	2504

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	MOLECULAR REPLACEMENT	THROUGHOUT	pdb entry 1D8U	2.2	79.06	35371	1873	99.63	0.203	0.201	0.253	RANDOM	38.837

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]
1.3			1.19		-2.49

RMS Deviations
Key	Refinement Restraint Deviation
r_scangle_it	5.221
r_dihedral_angle_1_deg	4.64
r_scbond_it	3.254
r_mcangle_it	2.49
r_angle_refined_deg	1.779
r_mcbond_it	1.369
r_angle_other_deg	1.052
r_symmetry_vdw_other	0.282
r_symmetry_hbond_refined	0.271
r_nbd_other	0.253
r_xyhbond_nbd_refined	0.239
r_nbd_refined	0.232
r_symmetry_vdw_refined	0.21
r_chiral_restr	0.111
r_nbtor_other	0.094
r_bond_refined_d	0.026
r_gen_planes_other	0.013
r_gen_planes_refined	0.012
r_bond_other_d	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4579
Nucleic Acid Atoms
Solvent Atoms	592
Heterogen Atoms	197

Software

Software
Software Name	Purpose
d*TREK	data scaling
AMoRE	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
CrystalClear	data collection
d*TREK	data reduction