1RG5

Structure of the photosynthetic reaction centre from Rhodobacter sphaeroides carotenoidless strain R-26.1

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, Tris-HCl, pH 8.0, VAPOR DIFFUSION, SITTING DROP, temperature 16.0K

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 144.033	α = 90
b = 144.033	β = 90
c = 190.072	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	298	CCD	ADSC QUANTUM 4	mirrors	2002-02-07	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SRS BEAMLINE PX9.6	0.87	SRS	PX9.6

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	2.5	23.34	99.1	0.074	11	4.7	78686	78686			57.4

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	2.5	2.54	99		0.864	2.2	4.8	3889

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	2.5	23.34	78682	74764	3918	99.12	0.15672	0.15672	0.15541	0.18188	RANDOM	52.933

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]
0.87	0.44		0.87		-1.31

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.024
r_dihedral_angle_4_deg	19.303
r_dihedral_angle_3_deg	16.258
r_dihedral_angle_1_deg	5.699
r_scangle_it	2.51
r_scbond_it	1.714
r_angle_refined_deg	1.686
r_angle_other_deg	1.322
r_mcangle_it	1.107
r_mcbond_it	0.907
r_symmetry_vdw_other	0.295
r_nbd_refined	0.2
r_nbd_other	0.172
r_mcbond_other	0.146
r_xyhbond_nbd_refined	0.12
r_chiral_restr	0.106
r_nbtor_other	0.09
r_symmetry_vdw_refined	0.078
r_symmetry_hbond_refined	0.054
r_bond_refined_d	0.017
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	6474
Nucleic Acid Atoms
Solvent Atoms	243
Heterogen Atoms	688

Software

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