Experiment: 3DDL

Crystallographic Structure of Xanthorhodopsin, a Light-Driven Ion Pump with Dual Chromophore

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	5.6	295	5mg/ml xanthorhodopsin in 30mM phosphate pH 5.6, 1mM Na azide was solubilized in 1/3 volume of 16.7% dimyristoyl phoshatidylcholine in 20% nonyl maltoside. Crystals grew in 2.5-3M Na phosphate, pH 5.6, 2.5 mM Na azide after 3-4 months, VAPOR DIFFUSION, SITTING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.68	54.03

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 52.74	α = 76.35
b = 59.49	β = 74.93
c = 59.72	γ = 64.08

Symmetry
Space Group	P 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	ADSC QUANTUM 315		2007-12-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-1	0.979	SSRL	BL9-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	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	1.9	45.1	94.1	0.057	8.4	3.6		46289

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.9	1.97	85.5		0.485	1.5	3.53	4215

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION		1.9	45.1	46278	2333	94.1	0.247	0.255	0.265	0.272	46.446

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]
16.933	3.302	-16.013	-0.766	-6.765	-16.167

RMS Deviations
Key	Refinement Restraint Deviation
c_scangle_it	2.859
c_mcangle_it	2.257
c_scbond_it	1.973
c_mcbond_it	1.413
c_angle_deg	1.349
c_bond_d	0.012

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3925
Nucleic Acid Atoms
Solvent Atoms	62
Heterogen Atoms	430

Software

Software
Software Name	Purpose
d*TREK	data scaling
CNS	refinement
PDB_EXTRACT	data extraction
Blu-Ice	data collection
d*TREK	data reduction
PHASER	phasing