1XZV

T-to-THigh Quaternary Transitions in Human Hemoglobin: alphaP95A deoxy low-salt

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1XXT	PDB ENTRY 1XXT

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		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	51.95

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 97.2	α = 90
b = 99.1	β = 90
c = 66	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	298	AREA DETECTOR	SDMS	GRAPHITE	1999-03-07	M	SINGLE WAVELENGTH

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

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	2.11	50	97	0.114	7.4	6.5		36004

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)
	2.11	2.28	86.7		0.227	1.9	3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1XXT	2.11	10	2	35207	33086	2995		0.17	0.246	MATCHED TO PDB ENTRY 1XXT

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]

RMS Deviations
Key	Refinement Restraint Deviation
p_transverse_tor	32.1
p_staggered_tor	20.6
p_scangle_it	7.751
p_scbond_it	6.17
p_mcangle_it	3.474
p_mcbond_it	2.555
p_planar_tor	2.3
p_xyhbond_nbd	0.18
p_multtor_nbd	0.174
p_singtor_nbd	0.166
p_chiral_restr	0.137
p_hb_or_metal_coord	0.127
p_planar_d	0.041
p_angle_d	0.026
p_bond_d	0.011
p_plane_restr	0.011
p_angle_deg
p_xhyhbond_nbd
p_orthonormal_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4376
Nucleic Acid Atoms
Solvent Atoms	194
Heterogen Atoms	172

Software

Software
Software Name	Purpose
SDMS	data collection
SDMS	data reduction
X-PLOR	model building
PROLSQ	refinement
SDMS	data scaling
X-PLOR	phasing