1IEE

STRUCTURE OF TETRAGONAL HEN EGG WHITE LYSOZYME AT 0.94 A FROM CRYSTALS GROWN BY THE COUNTER-DIFFUSION METHOD


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1LSAPDB ENTRY 1LSA

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1Counter-Diffusion in modified APCF reactors4.5293CRYSTALLISATION TOOK PLACE IN THE EUROPEAN SPACE AGENCY (ESA) ADVANCED PROTEIN CRYSTALLISATION FACILITY (APCF) ONBOARD THE NASA SPACE SHUTTLE'S STS-95 MISSION. A NEW APCF REACTOR WITH A LONG PROTEIN CHAMBER (67 MM) WAS DESIGNED TO PERFORM CRYSTALLIZATION USING THE COUNTER-DIFFUSION METHOD UNDER MICROGRAVITY CONDITIONS. THE PROTEIN CHAMBER WAS FILLED WITH A SOLUTION OF 99 MG/ML OF HEN EGG WHITE LYSOZYME (SUPPLIED BY SEIKAGAKU, BATCH NUMBER 100940, LOT E96302) DISSOLVED IN 0.05 M ACETATE BUFFER (PH 4.5). THE SALT CHAMBER CONTAINED 20% W/V NACL AND 0.05 M ACETATE BUFFER (PH 4.5). THE ROTATORY PLUG CONNECTING THE PROTEIN AND THE SALT CHAMBERS WAS FILLED WITH 10% W/V NACL, 0.5% W/V AGAROSE GEL AND 0.05 M ACETATE BUFFER. CRYSTALLISATION TOOK PLACE IN MICROGRAVITY AT 20+/-0.1 C., Counter-Diffusion in modified APCF reactors, temperature 293K
Crystal Properties
Matthews coefficientSolvent content
1.6726.7

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 77.061α = 90
b = 77.061β = 90
c = 37.223γ = 90
Symmetry
Space GroupP 43 21 2

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray110IMAGE PLATEMARRESEARCH1998-12-10MSINGLE WAVELENGTH
21110IMAGE PLATEMARRESEARCH1998-12-10
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONEMBL/DESY, HAMBURG BEAMLINE BW7B0.8337EMBL/DESY, HAMBURGBW7B
2SYNCHROTRONEMBL/DESY, HAMBURG BEAMLINE X110.9057EMBL/DESY, HAMBURGX11

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
10.943198.90.05215.55.540207072390-38.7
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)
0.940.9688.60.3292.63912

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Cut-off Sigma (I)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (All)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUTPDB ENTRY 1LSA0.9431-37239072390365598.90.12260.12260.12330.1509RANDOM14.4
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
37956.31173.6
RMS Deviations
KeyRefinement Restraint Deviation
s_non_zero_chiral_vol0.115
s_zero_chiral_vol0.104
s_approx_iso_adps0.072
s_anti_bump_dis_restr0.067
s_similar_adp_cmpnt0.048
s_angle_d0.037
s_from_restr_planes0.031
s_bond_d0.016
s_rigid_bond_adp_cmpnt0.006
s_similar_dist
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms1229
Nucleic Acid Atoms
Solvent Atoms255
Heterogen Atoms6

Software

Software
Software NamePurpose
SHELXL-97refinement
SCALEPACKdata scaling
CNSrefinement
DENZOdata reduction
CNSphasing