Experiment: 1NTG

Crystal Structure of the EMAP II-like Cytokine Released from human tyrosyl-tRNA Synthetase

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1FL0	EMAP II structure (PDB 1FL0)

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.9	279	ammonium sulfate, Sodium phosphate mono-basic, potassium phosphate di-basic, acetone, pH 6.9, VAPOR DIFFUSION, SITTING DROP, temperature 279K

Crystal Properties
Matthews coefficient	Solvent content
2.63	52.85

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 54.621	α = 103.51
b = 59.515	β = 109.95
c = 71.591	γ = 101.52

Symmetry
Space Group	P 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	AREA DETECTOR	MARRESEARCH		2001-10-30	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	SIEMENS	1.5418

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	2.21	20	94.6	0.067		3.7	39281	39281

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)
	2.21	2.29	83.7		0.252	3.8

Refinement

Statistics
Diffraction ID	Structure Solution 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	EMAP II structure (PDB 1FL0)	2.21	20	39761	35773	1786		0.251	0.2498	0.296	0.298	RANDOM

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
c_angle_d	1.54
c_bond_d	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5320
Nucleic Acid Atoms
Solvent Atoms	182
Heterogen Atoms

Software

Software
Software Name	Purpose
CNS	refinement
MAR345	data collection
SCALEPACK	data scaling
CNS	phasing
SHELXL-97	refinement