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Structure of the amyloid-forming peptide YLAAVL from human PACAP, polymorph B


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1EVAPORATION, RECRYSTALLIZATION310the peptide was dissolved at approximately 1 mg/ml in 0.2 M acetate buffer containing 30% (v/v) acetonitrile and incubated at 310 K
Crystal Properties
Matthews coefficientSolvent content
1.4917.27

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 20.035α = 90
b = 18.703β = 92.69
c = 20.616γ = 90
Symmetry
Space GroupP 1 21 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100PIXELRIGAKU HyPix-6000HE2024-06-12MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODERIGAKU PhotonJet-R1.54184

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)Rrim I (All)CC (Half)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
11.314.798.940.0760.9987.14.2238316.26
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)Rrim I (All)CC (Half)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
11.31.3598.440.4160.958

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodResolution (High)Resolution (Low)Cut-off Sigma (F)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-Work (Depositor)R-Work (DCC)R-Free (Depositor)R-Free (DCC)Mean Isotropic B
X-RAY DIFFRACTIONAB INITIO PHASINGFREE R-VALUE1.314.71.39377138297.440.21990.21830.21870.23350.23328.57
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]
RMS Deviations
KeyRefinement Restraint Deviation
f_dihedral_angle_d11.7711
f_angle_d2.3194
f_chiral_restr0.1256
f_bond_d0.0236
f_plane_restr0.0164
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms184
Nucleic Acid Atoms
Solvent Atoms7
Heterogen Atoms

Software

Software
Software NamePurpose
PHENIXrefinement
CrysalisProdata reduction
CrysalisProdata scaling
SHELXTphasing