7NFF

An octameric barrel state of a de novo coiled-coil assembly: CC-Type2-(LaId)4-I24A.

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8.5	292	After 1:1 dilution with the peptide solution, the resulting conditions were 50 mM 2-amino-2-(hydroxymethyl)propane-1,3-diol (TRIS) and 10% v/v ethanol.

Crystal Properties
Matthews coefficient	Solvent content
2.81	56.2

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 47.435	α = 90
b = 47.435	β = 90
c = 127.515	γ = 90

Symmetry
Space Group	I 4 2 2

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 2M		2015-01-29	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I04-1	0.9174	Diamond	I04-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim 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	1.55	63.76	98.7	0.065	0.066	0.014	1	20.7	23.7		10901			27.13

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.55	1.59	87.6		3.095	3.194	0.76	0.488	0.8	16.6

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	model helices	1.55	63.76	10389	507	98.53	0.1882	0.1876	0.1986	RANDOM	32.385

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]
1.1			1.1		-2.21

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.728
r_dihedral_angle_3_deg	16.529
r_dihedral_angle_1_deg	4.259
r_angle_refined_deg	1.886
r_angle_other_deg	1.611
r_chiral_restr	0.112
r_bond_refined_d	0.015
r_gen_planes_refined	0.008
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	445
Nucleic Acid Atoms
Solvent Atoms	34
Heterogen Atoms	26

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
DIALS	data reduction
Aimless	data scaling
xia2	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.