1XZ7

T-to-THigh Quaternary Transitions in Human Hemoglobin: alphaR92A deoxy low-salt

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	batch	7	298	10% PEG 6000, 10 mM potassium phosphate, 100 mM potassium chloride, 3 mM sodium dithionite, 10 mg/ml Hb, pH 7.0, batch, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.56	52.02

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 97.08	α = 90
b = 99.08	β = 90
c = 66.07	γ = 90

Symmetry
Space Group	P 21 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	277	IMAGE PLATE	RIGAKU RAXIS IV	osmic mirrors	2001-11-08	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200	1.5418

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	1.9	50	90.1	0.045	14.5	2.8	45795	45795

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)
	1.9	2.05	76.9		0.137	4.9	2.5	7928

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	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 and local R-free analysis	pdb entry 1RQ3	1.9	10	40750	40750	4346	89.29	0.17618	0.17323	0.20296	10 mutaully exclusive test sets matched to pdb entry 1RQ3	27.775

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]
-0.88			1.6		-0.72

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_3_deg	16.585
r_scangle_it	3.697
r_dihedral_angle_1_deg	3.469
r_scbond_it	2.307
r_angle_refined_deg	1.568
r_mcangle_it	1.435
r_angle_other_deg	1.083
r_mcbond_it	0.736
r_nbd_refined	0.232
r_symmetry_vdw_other	0.207
r_nbd_other	0.194
r_symmetry_hbond_refined	0.187
r_xyhbond_nbd_refined	0.183
r_symmetry_vdw_refined	0.126
r_xyhbond_nbd_other	0.094
r_chiral_restr	0.085
r_bond_refined_d	0.015
r_gen_planes_refined	0.006
r_gen_planes_other	0.005
r_bond_other_d

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4368
Nucleic Acid Atoms
Solvent Atoms	182
Heterogen Atoms	172

Software

Software
Software Name	Purpose
REFMAC	refinement
CrystalClear	data reduction
MOSFLM	data reduction
CCP4	data scaling
X-PLOR	phasing