1RGN

Structure of the reaction centre from Rhodobacter sphaeroides carotenoidless strain R-26.1 reconstituted with spheroidene

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8	289	Trisodium citrate, LDAO, 1,2,3-heptanetriol, ethylene glycol, Tris-HCl, pH 8.0, VAPOR DIFFUSION, SITTING DROP, temperature 16.0K

Crystal Properties
Matthews coefficient	Solvent content
5.54	77.78

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 139.817	α = 90
b = 139.817	β = 90
c = 184.047	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	100	CCD	MARRESEARCH	Toroidal mirror	1999-05-14	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-3	0.933	ESRF	ID14-3

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	2.8	24	89	0.055	22.5	3.9	46063	46063			79.5

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	2.8	2.85	91.4		0.342	3.2	3.5	2377

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2.8	24	45563	43286	2277	88	0.1907	0.19076	0.18859	0.23246	RANDOM	70.611

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]
0.16	0.08		0.16		-0.24

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.426
r_dihedral_angle_4_deg	21.89
r_dihedral_angle_3_deg	18.942
r_dihedral_angle_1_deg	6.835
r_scangle_it	2.353
r_angle_refined_deg	1.907
r_scbond_it	1.533
r_angle_other_deg	1.169
r_mcangle_it	1.039
r_mcbond_it	0.82
r_symmetry_vdw_other	0.242
r_nbd_refined	0.217
r_symmetry_vdw_refined	0.203
r_nbd_other	0.191
r_xyhbond_nbd_refined	0.181
r_mcbond_other	0.131
r_chiral_restr	0.105
r_nbtor_other	0.095
r_symmetry_hbond_refined	0.091
r_metal_ion_refined	0.046
r_bond_refined_d	0.019
r_xyhbond_nbd_other	0.013
r_gen_planes_refined	0.008
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6469
Nucleic Acid Atoms
Solvent Atoms	173
Heterogen Atoms	634

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing