1IHB

CRYSTAL STRUCTURE OF P18-INK4C(INK6)

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.5		VAPOR DIFFUSION, 4 DEG. C, 2 MICROLITER HANGING DROP CONTAINING 5 MG/ML PROTEIN, 20 MM TRIS (PH 8.5), 25 MM (NH4)2 HPO4, 0.5 MM DDT, 7% PEG 6K, 1 MM NACL EQUILIBRATED OVER A RESERVOIR CONTAINING 14% PEG 6K AND 2 M NACL. WITHIN 8 DAYS, 0.2 X 0.2 X 0.4 MM CRYSTALS., vapor diffusion - hanging drop

Crystal Properties
Matthews coefficient	Solvent content
2.3	44.4

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 55.51	α = 90
b = 151.7	β = 90
c = 40.46	γ = 90

Symmetry
Space Group	P 21 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	93	IMAGE PLATE	MARRESEARCH	MSC/YALE MIRRORS	1996-08-18	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1

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	1.95	30	90.3	0.049				24019			17.4

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	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	MIR	THROUGHOUT	1.95	8	22215	2208	87.6	0.209	0.209	0.289	RANDOM	18.1

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
x_dihedral_angle_d	22.1
x_scangle_it	5.58
x_scbond_it	3.69
x_mcangle_it	2.72
x_mcbond_it	1.89
x_angle_deg	1.5
x_improper_angle_d	1.48
x_bond_d	0.009
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d_na
x_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2383
Nucleic Acid Atoms
Solvent Atoms	207
Heterogen Atoms

Software

Software
Software Name	Purpose
PHASES	phasing
X-PLOR	refinement
DENZO	data reduction