1RQK

Structure of the reaction centre from Rhodobacter sphaeroides carotenoidless strain R-26.1 reconstituted with 3,4-dihydrospheroidene

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 = 141.718	α = 90
b = 141.718	β = 90
c = 187.179	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	IMAGE PLATE	MAC Science DIP-2020	MacScience mirrors	2001-12-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	ENRAF-NONIUS FR591

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	2.7	15.285	96.2	0.107	7.3	2.1	57635	57635			53

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	2.7	2.75	95.1		0.786	1.5	2	2800

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	2.7	15.285	57635	54771	2864	95.74	0.16356	0.16356	0.16194	0.19437	RANDOM	47.644

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]
0.72	0.36		0.72		-1.08

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.543
r_dihedral_angle_4_deg	17.977
r_dihedral_angle_3_deg	17.402
r_dihedral_angle_1_deg	5.856
r_scangle_it	2.228
r_angle_refined_deg	1.681
r_scbond_it	1.477
r_angle_other_deg	1.048
r_mcangle_it	0.991
r_mcbond_it	0.804
r_symmetry_vdw_other	0.282
r_nbd_refined	0.212
r_symmetry_vdw_refined	0.211
r_nbd_other	0.187
r_xyhbond_nbd_refined	0.167
r_symmetry_hbond_refined	0.13
r_xyhbond_nbd_other	0.113
r_mcbond_other	0.112
r_chiral_restr	0.091
r_nbtor_other	0.091
r_bond_refined_d	0.016
r_gen_planes_refined	0.007
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	208
Heterogen Atoms	726

Software

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