5V33

R. sphaeroides photosythetic reaction center mutant - Residue L223, Ser to Trp - Room Temperature Structure Solved on X-ray Transparent Microfluidic Chip

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	MICROFLUIDIC	7.8	293	Crystals were grown in microfluidic wells. LCPs were formulated by overlaying ~40 nl of protein solution over ~10 nl of solid monoolein. LCPs formed by diffusion during a 4 hour incubation. Precipitants were then introduced to the crystallization well, and crystals were observed after 3 days. Crystals were grown at 15-20 mg/mL protein concentration (in 10 mM Tris pH 7.8, 280 mM NaCl, 0.05% LDAO) with a precipitant of 1 M HEPES pH 7.5, 1.15 M (NH4)2(SO4) and 14-15 %w/v Jeffamine M-600.

Crystal Properties
Matthews coefficient	Solvent content
3.44	64.29

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 102.332	α = 90
b = 102.332	β = 90
c = 240.333	γ = 90

Symmetry
Space Group	P 42 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	298	PIXEL	DECTRIS PILATUS 6M		2016-08-04	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 23-ID-B	1.000	APS	23-ID-B

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (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	3.5	50	92	0.29	0.322	0.132	2.9	5.4		15671			54.65

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	3.5	3.56	94.6		0.72	0.793	0.317	0.618		5.4	784

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	FREE R-VALUE	4TQQ	3.487	47.076	14260	1435	83.65	0.2246	0.2205	0.2616	Random selection	45.5477

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]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	13.053
f_angle_d	0.702
f_chiral_restr	0.025
f_bond_d	0.003
f_plane_restr	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6476
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	443

Software

Software
Software Name	Purpose
PHENIX	refinement
HKL-2000	data collection
HKL-2000	data scaling
PDB_EXTRACT	data extraction
HKL-2000	data reduction
PHASER	phasing
DENZO	data reduction
SCALEPACK	data scaling

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.