3AM6

Crystal structure of the proton pumping rhodopsin AR2 from marine alga Acetabularia acetabulum

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	lipid mesophase	7.5	293	0.1M Tris-HCl (pH 7.5), 6% 2-methyl-2,4-pentanediol, 14% polyethylene glycol 400, lipid mesophase, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.93	58.08

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 84.12	α = 90
b = 110.487	β = 90
c = 129.116	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	93	CCD	MARMOSAIC 225 mm CCD		2009-10-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SPRING-8 BEAMLINE BL41XU	1.0000	SPring-8	BL41XU

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	3.192	50	89.5	0.115	8.7	4.9		18284

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.192	3.31	72.2		0.251		2.5

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	3.2	36.2	18250	891	89.2	0.29	0.29	0.324	RANDOM	24.1

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]
-6.54			17.34		-10.8

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	16.9
c_improper_angle_d	2.13
c_angle_deg	1.4
c_bond_d	0.011
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot
c_mcbond_it
c_mcangle_it
c_scbond_it
c_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7024
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	304

Software

Software
Software Name	Purpose
BSS	data collection
MrBUMP	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
CNS	refinement