3FRP

Crystal Structure of Cobra Venom Factor, a Co-factor for C3- and C5 convertase CVFBb

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.8	293	13% PEG 3350, 10 mM MES pH 6.8, 5 mM CaCl2, 200 mM NH4Cl, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.75	55.24

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 134.138	α = 90
b = 151.141	β = 90
c = 76.787	γ = 90

Symmetry
Space Group	P 21 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray		CCD	MARMOSAIC 225 mm CCD		2008-04-04	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-BM	1.0	APS	22-BM

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	2.6	50	91.9	0.08	21.7	7.1		43934

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)
	2.6	2.69	73.9		0.31	2	2.1

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	PDB ENTRY 2A74	2.61	50	41713	2221	91.16	0.25053	0.24799	0.29708	RANDOM	57.463

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]
1.84			-0.41		-1.44

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.228
r_dihedral_angle_3_deg	18.299
r_dihedral_angle_4_deg	17.327
r_dihedral_angle_1_deg	6.251
r_scangle_it	2.237
r_angle_refined_deg	1.323
r_scbond_it	1.318
r_mcangle_it	1.016
r_mcbond_it	0.536
r_chiral_restr	0.084

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.228
r_dihedral_angle_3_deg	18.299
r_dihedral_angle_4_deg	17.327
r_dihedral_angle_1_deg	6.251
r_scangle_it	2.237
r_angle_refined_deg	1.323
r_scbond_it	1.318
r_mcangle_it	1.016
r_mcbond_it	0.536
r_chiral_restr	0.084
r_bond_refined_d	0.011
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	9076
Nucleic Acid Atoms
Solvent Atoms	80
Heterogen Atoms	1

Software

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

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.