1BTG

CRYSTAL STRUCTURE OF BETA NERVE GROWTH FACTOR AT 2.5 A RESOLUTION IN C2 SPACE GROUP WITH ZN IONS BOUND

X-RAY DIFFRACTION

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Crystallization

Crystal Properties
Matthews coefficient	Solvent content
3.42	64.07

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 109.8	α = 90
b = 93.9	β = 123.1
c = 58.9	γ = 90

Symmetry
Space Group	C 1 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	298	AREA DETECTOR	AREA DETECTOR	Xuong-Hamlin	1993-01-26	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	rotating-anode X-ray tube	RIGAKU RU200

Data Collection

Refinement

Statistics
Diffraction ID	Structure Solution 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	Mean Isotropic B
X-RAY DIFFRACTION		2.5	20	2	44269			0.179

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
t_angle_deg	2.4
t_bond_d	0.014
t_dihedral_angle_d
t_incorr_chiral_ct
t_pseud_angle
t_trig_c_planes
t_gen_planes
t_it
t_nbd

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2508
Nucleic Acid Atoms
Solvent Atoms	54
Heterogen Atoms	3

Software

Software
Software Name	Purpose
HOWARD	data collection
TNT	refinement
XENGEN	data reduction
NIELSEN	data reduction
XUONG)	data reduction
Xengen (HOWARD, NIELSEN, XUONG)	data scaling