8QWW

Structure of the amyloid-forming peptide LYIQWL from Tc5b, grown from 10% ethanol without TFA

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
other	Other		ideal 5 residue beta strand

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	EVAPORATION, RECRYSTALLIZATION		310	The peptide was dissolved in 10 v/v% ethanol at 0.5 mg/ml concentration and incubated at 310K.

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 4.874	α = 90
b = 42.27	β = 95.62
c = 21.442	γ = 90

Symmetry
Space Group	P 1 21 1

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		2023-07-13	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	19.05	97.93	0.101	0.997	7.5	3.28		1372			6.35

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	88		0.567	0.727	1.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	1.5	19.05	1.36	1362	144	97.22	0.1396	0.1357	0.1737	9.22

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	22.7074
f_angle_d	1.158
f_chiral_restr	0.0599
f_bond_d	0.0061
f_plane_restr	0.0046

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	120
Nucleic Acid Atoms
Solvent Atoms	1
Heterogen Atoms

Software

Software
Software Name	Purpose
PHENIX	refinement
CrysalisPro	data reduction
CrysalisPro	data scaling
PHASER	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.