1KQL

Crystal structure of the C-terminal region of striated muscle alpha-tropomyosin at 2.7 angstrom resolution


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelOthera specially built 56-residue two-stranded coiled-coil that contains a 24 residue fragment from the high resolution structure of the GCN4 leucine zipper

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, SITTING DROP8.3295PEG 550 monomethylether, glycerol, sodium chloride, magnesium acetate, bicine, tris buffer, dithiothreitol, pH 8.3, VAPOR DIFFUSION, SITTING DROP, temperature 295K
Crystal Properties
Matthews coefficientSolvent content
4.1270

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 137.202α = 90
b = 137.202β = 90
c = 40.071γ = 120
Symmetry
Space GroupP 64 2 2

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray95CCDADSC QUANTUM 4mirrors2001-04-20MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONCHESS BEAMLINE A10.909CHESSA1

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
12.65099.90.05234.912722972212282.3
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)
2.62.6999.90.2179.148.2708

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 (All)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMolecular replacement using a specially built modelTHROUGHOUTa specially built 56-residue two-stranded coiled-coil that contains a 24 residue fragment from the high resolution structure of the GCN4 leucine zipper2.744.916469646950899.60.25510.25510.25230.2889RANDOM93.4
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]
2.2215.962.22-4.43
RMS Deviations
KeyRefinement Restraint Deviation
c_dihedral_angle_d15.6
c_angle_deg1
c_improper_angle_d0.64
c_bond_d0.007
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms892
Nucleic Acid Atoms
Solvent Atoms27
Heterogen Atoms

Software

Software
Software NamePurpose
AMoREphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling