2ODP

Complement component C2a, the catalytic fragment of C3- and C5-convertase of human complement

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	295	20% PEG 10000, 0.1M HEPES, 0.3M glycyl-glycyl-glycine, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.82	56.35

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 51.398	α = 90
b = 83.819	β = 92.1
c = 75.243	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	MAR CCD 225 mm		2006-06-24	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-BM	0.97969	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	1.9	50.48	98	0.04	31.7			49897

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	1.9	1.97	91.3		0.17	7.1

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 2ODQ	1.9	30	48766	2475	97.76	0.209	0.207	0.25	RANDOM	24.319

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]
0.61		0.98	0.25		-0.78

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.64
r_dihedral_angle_4_deg	18.19
r_dihedral_angle_3_deg	15.198
r_dihedral_angle_1_deg	6.104
r_scangle_it	4.618
r_scbond_it	3.104
r_mcangle_it	1.813
r_angle_refined_deg	1.637
r_mcbond_it	1.491
r_nbtor_refined	0.309

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.64
r_dihedral_angle_4_deg	18.19
r_dihedral_angle_3_deg	15.198
r_dihedral_angle_1_deg	6.104
r_scangle_it	4.618
r_scbond_it	3.104
r_mcangle_it	1.813
r_angle_refined_deg	1.637
r_mcbond_it	1.491
r_nbtor_refined	0.309
r_symmetry_vdw_refined	0.27
r_nbd_refined	0.217
r_symmetry_hbond_refined	0.206
r_xyhbond_nbd_refined	0.145
r_chiral_restr	0.116
r_metal_ion_refined	0.042
r_bond_refined_d	0.017
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3873
Nucleic Acid Atoms
Solvent Atoms	259
Heterogen Atoms	113

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data reduction
HKL-2000	data scaling
CNS	phasing

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.