1AP9

X-RAY STRUCTURE OF BACTERIORHODOPSIN FROM MICROCRYSTALS GROWN IN LIPIDIC CUBIC PHASES

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		5.6		PROTEIN FROM THE PURPLE MEMBRANE WAS DELIPIDATED AND SOLUBILIZED IN OCTYL GLUCOSIDE. PROTEIN WAS CRYSTALLIZED FROM 60 - 70% (W/W) MONOOLEIN, 0.7 - 4.0 M NA/K - PHOSPHATE IN A PHOSPHATE BUFFER AT PH 5.6, AT 20C AND IN THE DARK. THE MIXTURE WAS CENTRIFUGED AT 10000G FOR 150 MN PRIOR TO CRYSTALLISATION.

Crystal Properties
Matthews coefficient	Solvent content
2.39	48

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 61.76	α = 90
b = 61.76	β = 90
c = 104.16	γ = 120

Symmetry
Space Group	P 63

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	IMAGE PLATE	MARRESEARCH	ELLIPSOIDAL MIRROR	1996-08-19	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID13		ESRF	ID13

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	2.35	10	91.2	0.1	4.7	2		8045			45.5

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	2.35	2.56	90.4		0.266	2.4	1.6

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	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	PDB ENTRY 2BRD	2.35	5	2.5	6564	300	77.8	0.2582	0.2582	0.317	RANDOM	75

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
x_dihedral_angle_d	20.82
x_angle_deg	1.491
x_improper_angle_d	1.188
x_bond_d	0.008
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d_na
x_improper_angle_d_prot
x_mcbond_it
x_mcangle_it
x_scbond_it
x_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1694
Nucleic Acid Atoms
Solvent Atoms	26
Heterogen Atoms	20

Software

Software
Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
DENZO	data reduction
CCP4	data scaling
X-PLOR	phasing