1A72

AN ACTIVE-SITE DOUBLE MUTANT (PHE93->TRP, VAL203->ALA) OF HORSE LIVER ALCOHOL DEHYDROGENASE IN COMPLEX WITH THE ISOSTERIC NAD ANALOG CPAD

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.4	277	CRYSTALS GROWN FROM 4 MICROLITER HANGING DROPS OF 10MG/ML PROTEIN IN 50 MM TRIS BUFFER (PH8.4 @4C) 4% (V/V) ETOH EQUILIBRATED AT 4C WITH WELLS CONTAINING 11-13% ETOH, vapor diffusion - hanging drop, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.3	46.82

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 55.5	α = 90
b = 74.2	β = 90
c = 179.2	γ = 90

Symmetry
Space Group	C 2 2 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	275	AREA DETECTOR	XENTRONICS		1993-12-15	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)	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	2.6	22	76.9	0.078	0.078	6			10388		2	38

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	2.56	2.68	43		2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	A POSTERIORI	PDB ENTRY 8ADH	2.6	8	2	10388	1072	76.9	0.176	0.176	0.3	RANDOM	16.7

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
x_dihedral_angle_d	25.3
x_scangle_it	3.29
x_scbond_it	2.24
x_mcangle_it	2.23
x_angle_deg	2
x_improper_angle_d	1.6
x_mcbond_it	1.43
x_bond_d	0.013
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d_na
x_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2786
Nucleic Acid Atoms
Solvent Atoms	78
Heterogen Atoms	46

Software

Software
Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
XDS	data reduction
X-GEN	data scaling
X-PLOR	phasing