4V81

The crystal structure of yeast CCT reveals intrinsic asymmetry of eukaryotic cytosolic chaperonins

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		277	Prior to crystallisation CCT was complexed to alpha-Actin and Plp2 and purified as described (Altschuler et al., 2009, Febs Letters, 583, 782-786) and crystallised in hanging drops in the presence of ATP and Beryllium Fluoride, which was added as BeSO4 and KF. Equilibration buffer contained 100 mM Hepes pH 7.6, 50 mM MgCl2, 300 mM Na2SeO4, 6% PEG8k,1.0 mM TCEP, and 20% glycerol. Note that in the drop, protein at 4.3 mg/ml was mixed with equal amounts of equilibration buffer lacking glycerol, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
3.1	60.32

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 159.1	α = 85.23
b = 162.54	β = 81.15
c = 268.1	γ = 61.17

Symmetry
Space Group	P 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	PIXEL	PSI PILATUS 6M		2008-09-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X06SA	1.0001	SLS	X06SA

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	3.8	90	91.6	0.077	8.4	1.86	392007	209755	1	1	112

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	3.8	4	93.2		0.392	1.92

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	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	PDB entry 1Q3Q	3.8	89.946	1.99	392007	209673	10483	91.56	0.3089	0.307	0.3443	5% (XDSCONV)

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]
17.1038	8.2778	32.079	-7.3146	6.802	-9.7892

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	14.414
f_angle_d	0.678
f_chiral_restr	0.043
f_bond_d	0.003
f_plane_restr	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	55221
Nucleic Acid Atoms
Solvent Atoms	4
Heterogen Atoms	418

Software

Software
Software Name	Purpose
XDS	data scaling
PHENIX	refinement
XDS	data reduction

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.