2SGA

ELECTRON DENSITY CALCULATIONS AS AN EXTENSION OF PROTEIN STRUCTURE REFINEMENT. STREPTOMYCES GRISEUS PROTEASE AT 1.5 ANGSTROMS RESOLUTION

X-RAY DIFFRACTION

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Crystallization

Crystal Properties
Matthews coefficient	Solvent content
2.31	46.76

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 55.12	α = 90
b = 55.12	β = 90
c = 54.81	γ = 90

Symmetry
Space Group	P 42

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Free (Depositor)	Mean Isotropic B
X-RAY DIFFRACTION		1.5	12			0.126

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]

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1259
Nucleic Acid Atoms
Solvent Atoms	220
Heterogen Atoms

Software

Software
Software Name	Purpose
PROLSQ	refinement