3AET

Structure of the light-independent protochlorophyllide reductase catalyzing a key reduction for greening in the dark

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	277	20% PEG3350, 0.2M SODIUM CLORIDE, 0.1M MOPS-NAOH(PH7.0), pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.7	54.47

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 80.442	α = 102.53
b = 81.44	β = 110.89
c = 95.864	γ = 94.44

Symmetry
Space Group	P 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	ADSC QUANTUM 210		2007-12-08	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PHOTON FACTORY BEAMLINE AR-NW12A		Photon Factory	AR-NW12A

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	2.9	50		0.093				42863		-2	69.55

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	MOLECULAR REPLACEMENT	THROUGHOUT	2ZMP	2.91	40.05	40688	2171	89	0.215	0.211	0.275	RANDOM	56.64

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]
3.88	1	-0.63	-2.41	-0.87	-2.14

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.486
r_dihedral_angle_4_deg	21.934
r_dihedral_angle_3_deg	21.76
r_dihedral_angle_1_deg	6.947
r_scangle_it	1.844
r_angle_refined_deg	1.484
r_scbond_it	1.072
r_mcangle_it	0.765
r_mcbond_it	0.419
r_nbtor_refined	0.311
r_symmetry_vdw_refined	0.256
r_nbd_refined	0.24
r_symmetry_hbond_refined	0.18
r_xyhbond_nbd_refined	0.146
r_chiral_restr	0.101
r_bond_refined_d	0.011
r_gen_planes_refined	0.004
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	12760
Nucleic Acid Atoms
Solvent Atoms	6
Heterogen Atoms	16

Software

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