2XDQ

Dark Operative Protochlorophyllide Oxidoreductase (ChlN-ChlB)2 Complex

X-RAY DIFFRACTION

---

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.1	290	PROTEIN CONCENTRATION = 10 MG/ML TEMPERATURE = 17 DEGREES C ATMOSPHERE - ANAEROBIC, REDUCING METHOD - HANGING DROP VOLUMES - 3MICROL PROTEIN - 3MICROL RESERVOIR SOLUTION RESERVOIR - 9.5% PEG 6000, 85MM HEPES PH 7.1, CRYOPROTECTANT - 14% MPD, 15% GLYCEROL

Crystal Properties
Matthews coefficient	Solvent content
3.31	63

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 192.095	α = 90
b = 192.095	β = 90
c = 132.504	γ = 120

Symmetry
Space Group	P 63 2 2

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	ADSC CCD		2007-12-10	M	MAD
2	1	x-ray	100	CCD	ADSC CCD			M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID29		ESRF	ID29
2	SYNCHROTRON	SOLEIL BEAMLINE PROXIMA 1	0.9790, 0.9795	SOLEIL	PROXIMA 1

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	2.4	25	99.1	0.08	20	8.3		54878		1	55.8

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	2.4	2.49	100		0.47	3.5	8.6

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	SIRAS	THROUGHOUT	NONE	2.4	103.65	52744	2817	98.6	0.20408	0.20127	0.2569	RANDOM	69.175

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]
2.82	1.41		2.82		-4.23

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.555
r_dihedral_angle_4_deg	21.022
r_dihedral_angle_3_deg	17.666
r_dihedral_angle_1_deg	8.336
r_angle_refined_deg	2.023
r_scangle_it	1.892
r_scbond_it	1.133
r_mcangle_it	0.834
r_mcbond_it	0.448
r_chiral_restr	0.116
r_bond_refined_d	0.02
r_gen_planes_refined	0.014
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6793
Nucleic Acid Atoms
Solvent Atoms	140
Heterogen Atoms	23

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
SHELX	phasing