1KPE

PKCI-TRANSITION STATE ANALOG

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5		GROWN FROM PEG8K PH6.5 THE PENTACOVALENT TRANSITION STATE ANALOG WAS PREPARED BY SOAKING SODIUM TUNGSTATE AND ADENOSINE INTO THE CRYSTAL. THE COMPOUNDS WERE FOUND TO BIND IN THE ACTIVE SITE OF CHAIN B. THE ACTIVE SITE OF CHAIN A IS BLOCKED BY A LATTICE CONTACT AND IS NOT AVAILABLE TO THE SUBSTRATE. THREE NEW BONDS ARE FORMED UPON SOAKING THIS MIXTURE INTO THE PKCI CRYSTALS: ONE BETWEEN THE NE OF HIS B 112 AND THE ALPHA TUNGSTATE, ONE BETWEEN THE ALPHA AND BETA TUNGSTATE IONS, AND ONE BETWEEN THE NUCLEOSIDE RIBOSE AND THE ALPHA TUNGSTATE ION.

Crystal Properties
Matthews coefficient	Solvent content
2.65	53.5

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 46.2	α = 90
b = 77.8	β = 90
c = 80.8	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	110	IMAGE PLATE	RIGAKU RAXIS II		1996-10-10	M

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

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	1.8	20	84.3	0.085		8		23339		2

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		1.8	10	2	40772		78.9	0.195	0.195	0.223	22.5

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	26.98
x_angle_deg	1.969
x_improper_angle_d	1.76
x_bond_d	0.015
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
x_mcbond_it
x_mcangle_it
x_scbond_it
x_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1748
Nucleic Acid Atoms
Solvent Atoms	256
Heterogen Atoms	27

Software

Software
Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	phasing