5E61

Structure of amyloid-forming peptide FGAILSS (residues 23-29) from islet amyloid polypeptide

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		291	6.4mg/ml in 20mM Lithium hydroxide and mixed with 0.1M HEPES pH 6.5 and 0.5M Sodium Formate

Crystal Properties
Matthews coefficient	Solvent content
1.38	10.68

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 8.77	α = 88.22
b = 9.5	β = 80
c = 24.74	γ = 70.34

Symmetry
Space Group	P 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	291	CCD	ADSC QUANTUM 315		2014-04-25	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 24-ID-E	0.979	APS	24-ID-E

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	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	1.79	4.38	93.36	0.241	4.29	5.217		647

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.79	1.96	72.3		0.696	1.4

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	MOLECULAR REPLACEMENT	THROUGHOUT	1.79	4.38	582	65	93.36	0.17221	0.16661	0.21833	RANDOM	21.919

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]
-0.07	-0.39	0.41	-0.6		0.71

RMS Deviations
Key	Refinement Restraint Deviation
r_long_range_B_other	11.977
r_long_range_B_refined	11.7
r_dihedral_angle_3_deg	10.485
r_mcangle_other	8.445
r_mcangle_it	8.268
r_scangle_other	8.083
r_dihedral_angle_1_deg	7.168
r_dihedral_angle_2_deg	6.404
r_mcbond_it	5.487
r_scbond_it	4.911
r_scbond_other	4.305
r_mcbond_other	3.897
r_angle_refined_deg	2
r_angle_other_deg	0.764
r_chiral_restr	0.095
r_bond_refined_d	0.016
r_gen_planes_refined	0.007
r_bond_other_d	0.001
r_gen_planes_other	0.001
r_dihedral_angle_4_deg
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_scangle_it
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	98
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XDS	data scaling
PHASER	phasing