X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
otherDirect methods (SHELXS)

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP8EQUAL VOLUMES OF 10 MG/ML D-ALPHA-1 AND 10 MG/ML L-ALPHA-1 WERE MIXED IMMEDIATELY BEFORE CRYSTALLIZATION. THE RESERVOIR SOLUTION CONTAINED 90-93% 2-METHYL-2,4-PENTANEDIOL, 0.075 M ETHANOLAMINE HCL PH 9.75, 0.05 M TRIETHANOLAMINE HCL PH 8. THE HANGING DROP CONTAINED EQUAL VOLUMES OF RESERVOIR AND 10 MG/ML D,L MIX ALPHA-1. THE ACIDIC PEPTIDE PARTWAY TITRATES THE BASIC BUFFERS TO REACH THE UNKNOWN RESULTANT PH., vapor diffusion - hanging drop
Crystal Properties
Matthews coefficientSolvent content
1.6114.8

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 20.544α = 101.16
b = 20.859β = 97.03
c = 26.055γ = 118.06
Symmetry
Space GroupP -1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray115IMAGE PLATEMARRESEARCH1996-06-01MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONNSLS BEAMLINE X12CNSLSX12C

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Sym 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
10.751871.51010.61.4335731
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
10.750.7824.921

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodResolution (High)Resolution (Low)Number Reflections (All)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (All)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONDIRECT METHODSFREE R0.751833290332971.60.1310.130.145EVERY TENTH REFLECTION
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]
Coordinate Error
Structure Solution MethodRefinement High ResolutionRefinement Low Resolution
11250.04237.88
RMS Deviations
KeyRefinement Restraint Deviation
s_zero_chiral_vol0.101
s_anti_bump_dis_restr0.086
s_approx_iso_adps0.04
s_bond_d0.038
s_similar_adp_cmpnt0.038
s_similar_dist0.028
s_from_restr_planes0.017
s_rigid_bond_adp_cmpnt0.007
s_angle_d
s_non_zero_chiral_vol
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms204
Nucleic Acid Atoms
Solvent Atoms21
Heterogen Atoms16

Software

Software
Software NamePurpose
SHELXSphasing
SHELXL-97refinement
DENZOdata reduction
SCALEPACKdata scaling