8ANG

Structure of the amyloid-forming peptide LYIQWL from Tc5b, grown from 30% ethanol

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	EVAPORATION, RECRYSTALLIZATION		293	Peptide was dissolved in 30% ethanol at 0.5 mg/ml concentration, then incubated at 293K overnight.

Crystal Properties
Matthews coefficient	Solvent content
1.41

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 4.875	α = 90
b = 23.713	β = 90
c = 40.764	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	PIXEL	RIGAKU HyPix-6000HE		2022-01-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU PhotonJet-R	1.54184

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	Rrim I (All)	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	1.5	20.5	95.01	0.066	0.998	13.5	4.06		895			5.59

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Rrim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.5	1.55	65.59		0.204	0.978	3.8

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	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	ideal 5 residue beta strand form the software Fragon	1.5	20.5	1.37	893	81	94.8	0.0852	0.0842	0.0953	4.33

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	14.1589
f_angle_d	1.2361
f_chiral_restr	0.0657
f_bond_d	0.007
f_plane_restr	0.0063

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	60
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	3

Software

Software
Software Name	Purpose
PHENIX	refinement
CrysalisPro	data reduction
CrysalisPro	data scaling
Fragon	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.