Experiment: 1I6X

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1I5Z	1I5Z CRP DIMER

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	LIQUID DIFFUSION	7.8	298	100MM KCL, 1MM EDTA, 50MM TRIS, 35% GLYCEROL, 20:1 CAMP:CRP, pH 7.8, LIQUID DIFFUSION, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.41	49.01

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 46.262	α = 90
b = 93.343	β = 90
c = 105.339	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	95	IMAGE PLATE	MACSCIENCE	MULTILAYER	1998-08-21	M	SINGLE WAVELENGTH
2	1	x-ray	95	CCD	BRUKER SMART 2000	MULTILAYER	1998-05-21	M	SINGLE WAVELENGTH
3	1	x-ray	95	IMAGE PLATE	RIGAKU RAXIS IV		1998-06-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	MACSCIENCE	1.5418
2	ROTATING ANODE	MACSCIENCE	1.5418
3	SYNCHROTRON	NSLS BEAMLINE X4A	0.97950	NSLS	X4A

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
1,2,3	2.2	70	96.1	0.075	0.075	11.7	8		23757			37.3

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)
	2.2	2.24	83.4		0.311	0.311	3.1	2.6	1018

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1I5Z CRP DIMER	2.2	42.67	22833	22833	2243	95.6	0.23	0.23	0.269	0.26	SHELLS	52.3

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]
-0.55			0.56		-0.01

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	21.8
c_scangle_it	3.31
c_mcangle_it	2.64
c_scbond_it	2.24
c_mcbond_it	1.57
c_angle_deg	1.3
c_improper_angle_d	0.7
c_bond_d	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3176
Nucleic Acid Atoms
Solvent Atoms	83
Heterogen Atoms	74

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
CNS	refinement
CNS	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.