1XZ5

T-to-THigh Quaternary Transitions in Human Hemoglobin: alphaL91A 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 ammonium 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
2.55	51.8

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 97.1	α = 90
b = 99	β = 90
c = 65.9	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	1998-11-08	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	97.6	0.09	7.4	6.9		36432

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	2.27	88.2		0.252	1.7	3.3

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	TROUGHOUT	PDB ENTRY 1XXT	2.11	10	2	35561	34090	3089		0.176	0.248	MATCHED TO PDB ENTRY 1XXT	24.47

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	32.5
p_staggered_tor	20.8
p_scangle_it	6.772
p_scbond_it	5.283
p_mcangle_it	2.956
p_planar_tor	2.1
p_mcbond_it	2.089
p_multtor_nbd	0.17
p_xyhbond_nbd	0.17
p_singtor_nbd	0.16
p_hb_or_metal_coord	0.144
p_chiral_restr	0.125
p_planar_d	0.037
p_angle_d	0.022
p_bond_d	0.009
p_plane_restr	0.009
p_angle_deg
p_xhyhbond_nbd
p_orthonormal_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4374
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