2G18

Crystal Structure of Nostoc sp. 7120 phycocyanobilin:ferredoxin oxidoreductase (PcyA) Apoprotein

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5	293	18% PEG-8000, 25mM MES-NaOH, 50mM Calcium acetate, 10% dioxine, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 293K, pH 6.50

Crystal Properties
Matthews coefficient	Solvent content
1.96	37.15

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 78.501	α = 90
b = 141.332	β = 91.29
c = 121.842	γ = 90

Symmetry
Space Group	P 1 21 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 315	DOUBLE CRYSTAL MONOCHROMATOR	2005-06-02	M	SINGLE WAVELENGTH

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

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	2.5	43.94	99.7	0.084	0.084	13.9	3.7		91664

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.5	2.59	100		0.383	0.383	3.3	3.6

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2.5	43.94	91598	86919	4583	99.68	0.21326	0.2109	0.25716	RANDOM	53.428

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]
-0.45		-0.47	-0.86		1.28

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.835
r_dihedral_angle_4_deg	21.011
r_dihedral_angle_3_deg	17.998
r_dihedral_angle_1_deg	7.144
r_scangle_it	4.598
r_scbond_it	2.864
r_mcangle_it	1.671
r_angle_refined_deg	1.501
r_mcbond_it	1.476
r_nbtor_refined	0.314
r_symmetry_vdw_refined	0.3
r_metal_ion_refined	0.241
r_symmetry_hbond_refined	0.239
r_nbd_refined	0.232
r_xyhbond_nbd_refined	0.177
r_chiral_restr	0.098
r_bond_refined_d	0.016
r_gen_planes_refined	0.006
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_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	23422
Nucleic Acid Atoms
Solvent Atoms	190
Heterogen Atoms	1

Software

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