1Z3E

Crystal Structure of Spx in Complex with the C-terminal Domain of the RNA Polymerase Alpha Subunit

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	5.6	273	lithium sulfate, ammonium sulfate, sodium citrate, pH 5.6, VAPOR DIFFUSION, temperature 273K

Crystal Properties
Matthews coefficient	Solvent content
2.5	40

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 96.44	α = 90
b = 96.44	β = 90
c = 57.1	γ = 120

Symmetry
Space Group	H 3

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		2004-10-20	M	SINGLE WAVELENGTH
2	1	x-ray		M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.1	1.00003	ALS	8.2.1
2	SYNCHROTRON	ALS BEAMLINE 8.2.1	0.9794, 0.9796, 0.9952	ALS	8.2.1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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
1,2	1.5	33.71	99.2	0.042	0.042	12.5	2.8	31461	31461	2	2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.5	1.58	98.5	98.5	0.311	0.311	2.5	2.6

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	1.5	20	31689	31435	3108	99.2	0.196	0.196	0.196	0.22	random	17.484

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]
-1.132	-1.107		-1.132		2.265

RMS Deviations
Key	Refinement Restraint Deviation
c_scangle_it	5.79
c_scbond_it	4.294
c_mcangle_it	2.75
c_mcbond_it	2.129
c_angle_d	1.272
c_bond_d	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1509
Nucleic Acid Atoms
Solvent Atoms	143
Heterogen Atoms	20

Software

Software
Software Name	Purpose
SCALA	data scaling
CNS	refinement
PDB_EXTRACT	data extraction
MOSFLM	data reduction
CCP4	data scaling
SOLVE	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 R01GM157729.