1XZ7

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


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1RQ3pdb entry 1RQ3

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1batch729810% 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 coefficientSolvent content
2.5652.02

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 97.08α = 90
b = 99.08β = 90
c = 66.07γ = 90
Symmetry
Space GroupP 21 21 2

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray277IMAGE PLATERIGAKU RAXIS IVosmic mirrors2001-11-08MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODERIGAKU RU2001.5418

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
11.95090.10.04514.52.84579545795
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
1.92.0576.90.1374.92.57928

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUT and local R-free analysispdb entry 1RQ31.9104075040750434689.290.176180.173230.2029610 mutaully exclusive test sets matched to pdb entry 1RQ327.775
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]
-0.881.6-0.72
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_3_deg16.585
r_scangle_it3.697
r_dihedral_angle_1_deg3.469
r_scbond_it2.307
r_angle_refined_deg1.568
r_mcangle_it1.435
r_angle_other_deg1.083
r_mcbond_it0.736
r_nbd_refined0.232
r_symmetry_vdw_other0.207
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_3_deg16.585
r_scangle_it3.697
r_dihedral_angle_1_deg3.469
r_scbond_it2.307
r_angle_refined_deg1.568
r_mcangle_it1.435
r_angle_other_deg1.083
r_mcbond_it0.736
r_nbd_refined0.232
r_symmetry_vdw_other0.207
r_nbd_other0.194
r_symmetry_hbond_refined0.187
r_xyhbond_nbd_refined0.183
r_symmetry_vdw_refined0.126
r_xyhbond_nbd_other0.094
r_chiral_restr0.085
r_bond_refined_d0.015
r_gen_planes_refined0.006
r_gen_planes_other0.005
r_bond_other_d
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms4368
Nucleic Acid Atoms
Solvent Atoms182
Heterogen Atoms172

Software

Software
Software NamePurpose
REFMACrefinement
CrystalCleardata reduction
MOSFLMdata reduction
CCP4data scaling
X-PLORphasing