5BPW

Atomic-resolution structures of the APC/C subunits Apc4 and the Apc5 N-terminal domain

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8	293	Apc4 crystals were grown by vapour-diffusion in a buffer containing 10 mM malic acid, 20 mM MES, 20 mM Tris.HCl (pH 8.0), 160 mM NDSB 196, 10 mM EDTA and 19% (v/v) PEG 1500. Crystals were incubated in a cryoprotection buffer comprising 10 mM malic acid, 20 mM MES, 20 mM Tris.HCl (pH 8.0), 160 mM NDSB 196, 10 mM EDTA, 22% (v/v) PEG 1500 and 20% (v/v) ethylene glycol prior to freezing in liquid nitrogen.

Crystal Properties
Matthews coefficient	Solvent content
4.36	71.76

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 139.181	α = 90
b = 139.181	β = 90
c = 156.106	γ = 90

Symmetry
Space Group	P 4 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	100	CCD	ADSC QUANTUM 4		2013-05-03	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I24	0.987	Diamond	I24

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	3.4	57.8	99.8	0.182	5.16	6.5	21671	21671

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	3.4	3.67	99.6		0.6	2.3	6.5	4371

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION		FREE R-VALUE	3.4	51.943	1.36	21631	700	99.56	0.2208	0.2201	0.2749	91.8312

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]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	16.97
f_angle_d	1.828
f_chiral_restr	0.074
f_bond_d	0.012
f_plane_restr	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5091
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms

Software

Software
Software Name	Purpose
PHENIX	refinement
PDB_EXTRACT	data extraction
XDS	data reduction
SCALA	data scaling
PHENIX	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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.