Experiment: 8GJC

X-ray crystallographic structure of a beta-hairpin peptide derived from Abeta 17-35. (ORN)LVFFAED(ORN)GAI(N-Me-Ile)GLM

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	5W4H

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		298.15	Molecular Dynamics Morpheus solution containing 0.12M ethylene glycols mix, 0.1M Buffer System 3 pH 8.5, and 37.5% v/v precipitant mix 4. Molecular Dynamics ethylene glycols mix consists of 0.3 M diethylene glycol, 0.3 M triethylene glycol, 0.3 M tetraethylene glycol, 0.3 M penta(ethylene glycol). Molecular Dynamics Buffer System 3 consists of 1 M BICINE and 1 M Trisma Base. Molecular Dynamics precipitant mix 4 consists of 25 % w/v hexylene glycol, 25 % w/v poly(ethylene glycol) 1000, and 25 % w/v poly(ethylene glycol) 3350.

Crystal Properties
Matthews coefficient	Solvent content
2.1	41.34

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 38.164	α = 90
b = 38.164	β = 90
c = 32.054	γ = 120

Symmetry
Space Group	P 32 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	103.15	PIXEL	DECTRIS PILATUS3 6M		2022-04-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 5.0.2	0.99999	ALS	5.0.2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	CC (Half)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1	1.431	23.01	97.02	0.09013	0.999	24.44	16		9354

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.431	1.482			1.775	0.25

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	5W4H	1.431	23.01	7.36	9354	952	96.91	0.1597	0.1547	0.1807	0.1579

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
Key	Refinement Restraint Deviation
f_dihedral_angle_d	36.081
f_angle_d	1.146
f_chiral_restr	0.08
f_bond_d	0.006
f_plane_restr	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	226
Nucleic Acid Atoms
Solvent Atoms	31
Heterogen Atoms	44

Software

Software
Software Name	Purpose
PHENIX	refinement
XDS	data reduction
Aimless	data scaling
PHENIX	phasing