Experiment: 1A8I

SPIROHYDANTOIN INHIBITOR OF GLYCOGEN PHOSPHORYLASE

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1GPB	A 1.5 ANGSTROMS MODEL (E.P.MITCHELL, UNPUBLISHED) AND PDB ENTRY 1GPB

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.7	289	THE PROTEIN WAS CRYSTALLIZED FROM 0.01 M BES, PH 6.7, 0.003 M DTT, 0.001 M SPERMINE, 0.0001 M SODIUM EDTA, 0.02 % SODIUM AZIDE AT 16 DEGREES C. THE CRYSTALS WERE SOAKED IN 0.1 M SPIROHYDANTOIN AND CRYOPROTECTED WITH 25% (V/V) MPD (2-METHYL-2,4- PENTANEDIOL)., temperature 289K

Crystal Properties
Matthews coefficient	Solvent content
2.41	48.98

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 127.47	α = 90
b = 127.47	β = 90
c = 115.8	γ = 90

Symmetry
Space Group	P 43 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	IMAGE PLATE	MAR scanner 300 mm plate	MIRROR	1996-05-18	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SRS BEAMLINE PX9.6		SRS	PX9.6

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	1.78	19.9	86.4	0.034	16.4	2.6		78974

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.78	1.87	65.7		0.174	4	1.9

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	DIFFERENCE FOURIER	FREE R-FACTOR	A 1.5 ANGSTROMS MODEL (E.P.MITCHELL, UNPUBLISHED) AND PDB ENTRY 1GPB	1.78	19.9	75007	3967	86.4	0.182	0.1704	0.229	0.2139	RANDOM

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	6683
Nucleic Acid Atoms
Solvent Atoms	797
Heterogen Atoms	32

Software

Software
Software Name	Purpose
CCP4	model building
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
CCP4	phasing