7MH4

Crystal structure of R. sphaeroides Photosynthetic Reaction Center variant; Y(M210)3-bromotyrosine

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other		Model from the Chloro derivative

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	293	1 M potassium phosphate, 3.5% 1,2,3-heptanetriol, and 0.1% LDAO precipitant solution; 1.4-1.5 M potassium phosphate reservoir solution, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 141.337	α = 90
b = 141.337	β = 90
c = 186.87	γ = 120

Symmetry
Space Group	P 31 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	250	PIXEL	DECTRIS PILATUS 6M	Rh coated collimating mirror, K-B focusing mirrors	2017-08-11	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-2	0.97946	SSRL	BL9-2

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	2.48	39	99.6	0.108	0.121	0.996	10.16	5.076		76551			58.55

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	2.48	2.54	99.8		1.028	1.154	0.588	1.69	4.855

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 from the Chloro derivative	2.48	39	72899	3768	99.7	0.1688	0.1676	0.1926	RANDOM	48.26

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]
0.08	0.04		0.08		-0.27

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.5
r_dihedral_angle_4_deg	17.547
r_dihedral_angle_3_deg	14.706
r_dihedral_angle_1_deg	6.533
r_angle_refined_deg	2.219
r_angle_other_deg	1.218
r_chiral_restr	0.074
r_bond_refined_d	0.008
r_gen_planes_refined	0.008
r_gen_planes_other	0.004

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.5
r_dihedral_angle_4_deg	17.547
r_dihedral_angle_3_deg	14.706
r_dihedral_angle_1_deg	6.533
r_angle_refined_deg	2.219
r_angle_other_deg	1.218
r_chiral_restr	0.074
r_bond_refined_d	0.008
r_gen_planes_refined	0.008
r_gen_planes_other	0.004
r_bond_other_d	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6442
Nucleic Acid Atoms
Solvent Atoms	245
Heterogen Atoms	628

Software

Software
Software Name	Purpose
REFMAC	refinement
XSCALE	data scaling
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 R01GM157729.