1XZZ

Crystal structure of the ligand binding suppressor domain of type 1 inositol 1,4,5-trisphosphate receptor

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.8	295	Tris-HCl, PEG 6000, NaCl, TCEP, pH 7.8, VAPOR DIFFUSION, HANGING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.55	51.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 147.3	α = 90
b = 147.3	β = 90
c = 65	γ = 120

Symmetry
Space Group	H 3 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	APS-1	Rosenbaum-Rock double-crystal monochromator: water cooled, sagitally focusing 2nd crystal, Rosenbaum-Rock vertical focusing mirror	2003-03-05	M	SINGLE WAVELENGTH
2	1	x-ray	100	CCD	APS-1	Rosenbaum-Rock double-crystal monochromator: water cooled, sagitally focusing 2nd crystal, Rosenbaum-Rock vertical focusing mirror	2003-03-05	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 19-BM	0.9951	APS	19-BM
2	SYNCHROTRON	APS BEAMLINE 19-BM	0.9795, 0.9796, 0.9641	APS	19-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
1,2	1.64	50	99.5	0.046	75	13.3		32835	1	1	22.5

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)
1,2	1.64	1.7	96.4		0.581	2.7	7	3151

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	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	1.8	31.08	3	24349	1187	97.2	0.205	0.205	0.238	RANDOM	36.2

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]
-0.68	0.32		-0.68		1.36

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	24.4
c_scangle_it	7.56
c_scbond_it	5.62
c_mcangle_it	4.51
c_mcbond_it	3.55
c_angle_deg	1.5
c_improper_angle_d	0.76
c_bond_d	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1705
Nucleic Acid Atoms
Solvent Atoms	130
Heterogen Atoms	6

Software

Software
Software Name	Purpose
CNS	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
SOLVE	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.