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TOXOPLASMA GONDII HYPOXANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE COMPLEXED WITH 9-DEAZAGUANINE, ALPHA-D-5-PHOSPHORIBOSYL-1-PYROPHOSPHATE (PRPP) AND TWO MG2+ IONS
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s)
Type
Source
Accession Code
Details
other
UNPUBLISHED T. GONDII HGPRT-GMP COMPLEX STRUCTURE. LOOPS, WATERS AND GMP WERE REMOVED FROM ALL SUBUNITS OF THE MOLECULAR REPLACEMENT MODEL.
Crystallization
Crystalization Experiments
ID
Method
pH
Temperature
Details
1
VAPOR DIFFUSION, HANGING DROP
8
277
THE PROTEIN (20 mg ml-1) WAS MIXED WITH A SOLUTION CONSISTING OF
30% PEG 4000, 100 MM TRIS.HCL (PH 8.0),
200 MM LI2SO4, and 0.5 % BETA-OCTYLGLUCOPYRANOSIDE.
THE CRYSTAL WAS GROWN IN THE PRESENCE OF
2 MM 9-DEAZAGUANINE, 2 MM PRPP AND 10 MM MGCL2 AT 277 K. THE
CRYSTAL GREW IN 2 DAYS., VAPOR DIFFUSION, HANGING DROP
Crystal Properties
Matthews coefficient
Solvent content
2.22
45
Crystal Data
Unit Cell
Length ( Å )
Angle ( ˚ )
a = 69.33
α = 90
b = 90.18
β = 90
c = 75.72
γ = 90
Symmetry
Space Group
P 21 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
MARRESEARCH
RH-COATED MIRROR
1999-03-01
M
SINGLE WAVELENGTH
Radiation Source
ID #
Source
Type
Wavelength List
Synchrotron Site
Beamline
1
SYNCHROTRON
SSRL BEAMLINE BL9-1
SSRL
BL9-1
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
1.05
35
99.9
0.072
0.072
8.4
4.2
220504
220504
7.435
Highest Resolution Shell
ID #
Resolution (High)
Resolution (Low)
Percent Possible (All)
Percent Possible (Observed)
R Merge I (Observed)
R-Sym I (Observed)
Mean I Over Sigma (Observed)
Redundancy
Number Unique Reflections (All)
1
1.05
1.08
99.7
0.555
0.555
1.8
3.3
16129
Refinement
Statistics
Diffraction ID
Structure Solution Method
Cross Validation method
Starting model
Resolution (High)
Resolution (Low)
Number Reflections (All)
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
MOLECULAR REPLACEMENT
THROUGHOUT
UNPUBLISHED T. GONDII HGPRT-GMP COMPLEX STRUCTURE. LOOPS, WATERS AND GMP WERE REMOVED FROM ALL SUBUNITS OF THE MOLECULAR REPLACEMENT MODEL.
1.05
35
220433
220504
11158
99.9
0.1222
0.1327
0.1543
0.1579
5% of the reflections were randomly selected for the test set.