5I55

Crystal Structure of the Virulent PSM-alpha3 Peptide Forming a Cross-alpha amyloid-like Fibril

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		293	reservoir contained 0.2 M ammonium acetate, 0.1M BisTris pH 5.5, 45% MPD

Crystal Properties
Matthews coefficient	Solvent content
1.61	23.48

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 29.46	α = 90
b = 10.51	β = 111.98
c = 29.71	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	DECTRIS PILATUS 6M-F		2015-04-18	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 24-ID-C	0.9792,0.9794,0.9796	APS	24-ID-C

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	1.45	16.55	96.2	0.124	0.13	0.998	10.01	18.97		3126		-3	18.998

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.45	1.49	87.6		0.458	0.482	0.99	3.78	19.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	AB INITIO PHASING	THROUGHOUT	1.45	16.55	2812	313	96.69	0.1466	0.1427	0.1837	RANDOM	16.958

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]
-2.18		0.12	-1.07		2.41

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.304
r_dihedral_angle_3_deg	12.364
r_dihedral_angle_1_deg	5.467
r_angle_refined_deg	1.996
r_angle_other_deg	0.974
r_chiral_restr	0.148
r_bond_refined_d	0.017
r_gen_planes_refined	0.008
r_bond_other_d	0.002
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	185
Nucleic Acid Atoms
Solvent Atoms	12
Heterogen Atoms	12

Software

Software
Software Name	Purpose
REFMAC	refinement
XSCALE	data scaling
PDB_EXTRACT	data extraction
XDS	data reduction
Arcimboldo	phasing

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.