Experiment: 1EMS

CRYSTAL STRUCTURE OF THE C. ELEGANS NITFHIT PROTEIN

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7	295	methylpentanediol, sodium chloride, HEPES, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 295.0K

Crystal Properties
Matthews coefficient	Solvent content
2.74	55.06

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 68.75	α = 90
b = 100.44	β = 90
c = 158.65	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	98	CCD	ADSC QUANTUM 4		1999-07-11	M	TWO WAVELENGTH ANOMALOUS DIFFRACTION

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X8C	1.0090, 0.9928	NSLS	X8C

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	2.8	40	95.2	0.045	24.6	7.5	49928	49928

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	2.8	2.9			0.088			3897

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation 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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	TWO WAVELENGTH ANOMALOUS DIFFRACTION	THROUGHOUT	2.8	30	49386	49386	3315	94.8	0.181	0.181	0.19	0.186	0.231	0.2264	random	28.5

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]
6.51			-0.55		-5.95

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	23.7
c_angle_deg	1.4
c_improper_angle_d	0.86
c_bond_d	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6520
Nucleic Acid Atoms
Solvent Atoms	161
Heterogen Atoms	27

Software

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