223L

GENERATING LIGAND BINDING SITES IN T4 LYSOZYME USING DEFICIENCY-CREATING SUBSTITUTIONS

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7	277	CRYSTALS GROWN IN HANGING DROPS AT 4 DEGREES C. PROTEIN 10-20 MG/ML IN A BUFFER CONTAINING 0.1M NA2PO4 PH 6.6, 0.55 M NACL WAS DILUTED 1/2 WITH A WELL SOLUTION CONTAINING 1.8-2.2M NA/KPO4 PH 6.3-7.1 WITH OXIDIZED/REDUCED BME. CRYSTALS WERE EXPOSED TO BENZENE VAPOR IN A CAPILLARY FOR SEVERAL DAYS AT ROOM TEMPERATURE., pH 7.0, vapor diffusion - hanging drop, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.8	56.03

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 61.2	α = 90
b = 61.2	β = 90
c = 96.3	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	298	AREA DETECTOR	XUONG-HAMLIN MULTIWIRE	GRAPHITE MONOCHROMATOR	1991-08-30	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RUH2R

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	20	88	0.029

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.9				2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	DIFFERENCE FOURIER	WILD TYPE T4 LYSOZYME	1.9	20	15543	15543		88	0.168

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	1.97
t_nbd	0.068
t_bond_d	0.013
t_gen_planes	0.012
t_trig_c_planes	0.008
t_dihedral_angle_d
t_incorr_chiral_ct
t_pseud_angle
t_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1288
Nucleic Acid Atoms
Solvent Atoms	163
Heterogen Atoms	1

Software

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

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.