7C86

Time-resolved serial femtosecond crystallography reveals early structural changes in channelrhodopsin: Dark state structure

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	LIPIDIC CUBIC PHASE	6.9	293	100 mM MES, pH 6.9, 100 mM Na formate, and 30% PEG500DME

Crystal Properties
Matthews coefficient	Solvent content
2.62	53.07

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 61.8	α = 90
b = 142.2	β = 90
c = 94.7	γ = 90

Symmetry
Space Group	C 2 2 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	293	CCD	MPCCD		2016-10-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	FREE ELECTRON LASER	SACLA BEAMLINE BL3	1.77	SACLA	BL3

Serial Crystallography

Sample delivery method
Diffraction ID	Description	Sample Delivery Method
1		injection

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	CC (Half)	R Split (All)	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	2.3	47.35	100	0.9962	0.061	9.64	561.2		18961

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	CC (Half)	R Split (All)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.3	2.34	100		0.8421	0.6049	1.55	138.5

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	3UG9	2.3	15	17940	901	99.43	0.1843	0.182	0.2322	RANDOM	67.069

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]
1.58			-5.49		3.9

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.587
r_dihedral_angle_4_deg	19.455
r_dihedral_angle_3_deg	16.241
r_dihedral_angle_1_deg	5.827
r_angle_refined_deg	1.393
r_angle_other_deg	1.314
r_chiral_restr	0.069
r_bond_refined_d	0.008
r_gen_planes_refined	0.007
r_bond_other_d	0.001

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.587
r_dihedral_angle_4_deg	19.455
r_dihedral_angle_3_deg	16.241
r_dihedral_angle_1_deg	5.827
r_angle_refined_deg	1.393
r_angle_other_deg	1.314
r_chiral_restr	0.069
r_bond_refined_d	0.008
r_gen_planes_refined	0.007
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2317
Nucleic Acid Atoms
Solvent Atoms	38
Heterogen Atoms	174

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
CrystFEL	data reduction
CrystFEL	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.