249L

THE RESPONSE OF T4 LYSOZYME TO LARGE-TO-SMALL SUBSTITUTIONS WITHIN THE CORE AND ITS RELATION TO THE HYDROPHOBIC EFFECT

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.8		pH 6.8

Crystal Properties
Matthews coefficient	Solvent content
2.8	48.3

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 60.87	α = 90
b = 60.87	β = 90
c = 96.9	γ = 120

Symmetry
Space Group	P 32 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	300	AREA DETECTOR	XUONG-HAMLIN MULTIWIRE		1995-04-24	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	1.9		93	0.048	11.7	2.7		19671		2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	DIFFERENCE FOURIER	1.9	10	20903		93	0.15

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_dihedral_angle_d	14.5
t_angle_deg	1.94
t_nbd	0.02
t_bond_d	0.015
t_gen_planes	0.012
t_trig_c_planes	0.007
t_incorr_chiral_ct
t_pseud_angle
t_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1302
Nucleic Acid Atoms
Solvent Atoms	152
Heterogen Atoms	10

Software

Software
Software Name	Purpose
TNT	refinement
UCSD	data reduction
UCSD	data scaling
TNT	phasing