2CTX

THE REFINED CRYSTAL STRUCTURE OF ALPHA-COBRATOXIN FROM NAJA NAJA SIAMENSIS AT 2.4-ANGSTROMS RESOLUTION

X-RAY DIFFRACTION

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Crystallization

Crystal Properties
Matthews coefficient	Solvent content
2.31	46.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 76.61	α = 90
b = 76.61	β = 90
c = 42.76	γ = 120

Symmetry
Space Group	P 65 2 2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION		2.4	10	3271			0.195

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
p_staggered_tor	26.8
p_orthonormal_tor	23.1
p_scangle_it	2.904
p_mcangle_it	2.865
p_planar_tor	2.6
p_mcbond_it	1.691
p_scbond_it	1.673
p_multtor_nbd	0.403
p_xhyhbond_nbd	0.349
p_chiral_restr	0.256
p_singtor_nbd	0.247
p_planar_d	0.085
p_angle_d	0.071
p_bond_d	0.018
p_plane_restr	0.014
p_angle_deg
p_hb_or_metal_coord
p_xyhbond_nbd
p_transverse_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	518
Nucleic Acid Atoms
Solvent Atoms	31
Heterogen Atoms

Software

Software
Software Name	Purpose
PROLSQ	refinement