7ZN8

Crystal structure of the light-driven inward proton pump xenorhodopsin BcXeR in the ground state at pH 7.0 in the presence of sodium at 100K

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	LIPIDIC CUBIC PHASE		293	0.8 M Na/K-Pi pH 8.2 crystals soaked in 1.2 M Na/K-Pi pH 7.0 before harvesting

Crystal Properties
Matthews coefficient	Solvent content
2.91	57.67

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 68.6	α = 90
b = 109.6	β = 90
c = 119.3	γ = 90

Symmetry
Space Group	P 21 21 21

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 EIGER X 16M		2021-03-25	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PETRA III, EMBL c/o DESY BEAMLINE P14 (MX2)	0.976	PETRA III, EMBL c/o DESY	P14 (MX2)

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	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	2.2	49.798	85.5	0.163	0.998	10.9	13.1		37291

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.2	2.293			3.775	0.5	0.8

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	1XIO	2.2	20	35350	1868	80.19	0.1998	0.1977	0.2385	RANDOM	35.505

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]
0.7			0.67		-1.38

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	27.994
r_dihedral_angle_4_deg	20.616
r_dihedral_angle_3_deg	12.593
r_dihedral_angle_1_deg	4.895
r_angle_refined_deg	1.091
r_angle_other_deg	1.06
r_chiral_restr	0.052
r_bond_refined_d	0.004
r_gen_planes_refined	0.004
r_bond_other_d

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	27.994
r_dihedral_angle_4_deg	20.616
r_dihedral_angle_3_deg	12.593
r_dihedral_angle_1_deg	4.895
r_angle_refined_deg	1.091
r_angle_other_deg	1.06
r_chiral_restr	0.052
r_bond_refined_d	0.004
r_gen_planes_refined	0.004
r_bond_other_d
r_gen_planes_other

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5262
Nucleic Acid Atoms
Solvent Atoms	281
Heterogen Atoms	745

Software

Software
Software Name	Purpose
Aimless	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
XDS	data reduction
MOLREP	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.