1BAO

THE CONTRIBUTION OF BURIED HYDROGEN BONDS TO PROTEIN STABILITY: THE CRYSTAL STRUCTURES OF TWO BARNASE MUTANTS

X-RAY DIFFRACTION

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Crystallization

Crystal Properties
Matthews coefficient	Solvent content
2.2	44.11

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 58.809	α = 90
b = 58.809	β = 90
c = 81.902	γ = 120

Symmetry
Space Group	P 32

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray

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		2.2	6	3	11724			0.152

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	19.5
p_orthonormal_tor	16.5
p_scangle_it	3.29
p_planar_tor	2.52
p_scbond_it	2.36
p_mcangle_it	1.98
p_mcbond_it	1.28
p_xhyhbond_nbd	0.175
p_singtor_nbd	0.167
p_multtor_nbd	0.155
p_chiral_restr	0.142
p_planar_d	0.056
p_angle_d	0.053
p_bond_d	0.018
p_plane_restr	0.015
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	2538
Nucleic Acid Atoms
Solvent Atoms	213
Heterogen Atoms	1

Software

Software
Software Name	Purpose
X-PLOR	model building
PROLSQ	refinement
X-PLOR	refinement
X-PLOR	phasing