2A73

Human Complement Component C3

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.2	293	PEG 550 MME, sodium acetate, pH 6.2, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
3.27	62.4

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 116.98	α = 90
b = 156.26	β = 90
c = 271.2	γ = 90

Symmetry
Space Group	I 2 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 QUANTUM 4		2005-02-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-4	0.9393	ESRF	ID14-4

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	3.3	39.12	99.7	0.081	10.7	4.5	37932	37818	-999	-3.7

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	3.3	3.5	99.2		0.433	2.3	4.5

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	PDB ENTRY 1C3D and structure of C3c	3.3	40	37932	35817	1882	99.77	0.23302	0.23005	0.28943	RANDOM	94.4

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]
2.3			-0.03		-2.27

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.93
r_dihedral_angle_3_deg	20.345
r_dihedral_angle_4_deg	16.127
r_dihedral_angle_1_deg	6.596
r_scangle_it	1.06
r_scbond_it	0.578
r_mcangle_it	0.561
r_angle_refined_deg	0.528
r_nbtor_refined	0.316
r_mcbond_it	0.305
r_nbd_refined	0.215
r_xyhbond_nbd_refined	0.151
r_symmetry_vdw_refined	0.131
r_symmetry_hbond_refined	0.126
r_chiral_restr	0.035
r_gen_planes_refined	0.003
r_bond_refined_d	0.002
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	12771
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	89

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
XDS	data reduction
XSCALE	data scaling
PHASER	phasing