3FWY

Crystal structure of the L protein of Rhodobacter sphaeroides light-independent protochlorophyllide reductase (BchL) with MgADP bound: a homologue of the nitrogenase Fe protein

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	CAPILLARY BATCH DIFFUSION	7.8	301	20-25% PEG 3350, 200mM Magnesium formate, 10mM MgADP, pH 7.8, CAPILLARY BATCH DIFFUSION, temperature 301K

Crystal Properties
Matthews coefficient	Solvent content
2.09	41.01

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 56.729	α = 90
b = 86.622	β = 90
c = 117.169	γ = 90

Symmetry
Space Group	P 21 21 21

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	MARMOSAIC 325 mm CCD	Flat collimating mirror, toroid focusing mirror	2008-01-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-2	0.98000	SSRL	BL9-2

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	1.63	50	96.4	0.037	40	2	133747	133747

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	1.63	1.67	93.83		0.242	4.6	2	13313

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 2NIP	1.63	33.02	1.63	66727	3544	96.24	0.17529	0.17403	0.1986	RANDOM	14.577

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]
-0.01			0.01		-0.01

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.46
r_dihedral_angle_4_deg	17.812
r_dihedral_angle_3_deg	11.914
r_dihedral_angle_1_deg	6.144
r_scangle_it	6.086
r_scbond_it	4.595
r_mcangle_it	1.758
r_mcbond_it	1.434
r_angle_refined_deg	1.206
r_angle_other_deg	0.874
r_mcbond_other	0.512
r_symmetry_vdw_other	0.282
r_symmetry_hbond_refined	0.267
r_nbd_refined	0.217
r_symmetry_vdw_refined	0.217
r_nbd_other	0.19
r_nbtor_refined	0.176
r_chiral_restr	0.152
r_xyhbond_nbd_refined	0.134
r_nbtor_other	0.082
r_metal_ion_refined	0.026
r_bond_refined_d	0.008
r_gen_planes_refined	0.004
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4112
Nucleic Acid Atoms
Solvent Atoms	402
Heterogen Atoms	64

Software

Software
Software Name	Purpose
HKL-2000	data collection
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling