1SWD

APO-CORE-STREPTAVIDIN IN COMPLEX WITH BIOTIN (TWO UNOCCUPIED BINDING SITES) AT PH 4.5


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1SWAPDB ENTRY 1SWA

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
14.5PROTEIN-BIOTIN COMPLEX WAS CO-CRYSTALLIZED FROM 50% MPD (2-METHYL-PENTANE-2,4-DIOLE, PH 4.5) WITH 1.2M EXCESS OF BIOTIN
Crystal Properties
Matthews coefficientSolvent content
2.1342.13

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 57.794α = 90
b = 85.191β = 100.13
c = 46.599γ = 90
Symmetry
Space GroupP 1 21 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray295AREA DETECTORNICOLET1996-04-23M
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODERIGAKU RUH2R

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
11.950760.04214725758
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)
1.92200.4171.1

Refinement

Statistics
Diffraction IDStructure Solution MethodStarting modelResolution (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 DIFFRACTIONMOLECULAR REPLACEMENTPDB ENTRY 1SWA1.910255132550760.2090.2020.328EVERY 10TH 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
3272.33735.2
RMS Deviations
KeyRefinement Restraint Deviation
s_zero_chiral_vol0.096
s_similar_adp_cmpnt0.095
s_non_zero_chiral_vol0.094
s_angle_d0.026
s_from_restr_planes0.018
s_anti_bump_dis_restr0.008
s_bond_d0.006
s_similar_dist
s_rigid_bond_adp_cmpnt
s_approx_iso_adps
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms3489
Nucleic Acid Atoms
Solvent Atoms234
Heterogen Atoms32

Software

Software
Software NamePurpose
SHELXL-96model building
X-PLORmodel building
SHELXL-96refinement
X-PLORrefinement
XENGENdata reduction
XENGENdata scaling
SHELXL-96phasing
X-PLORphasing