1QK5

TOXOPLASMA GONDII HYPOXANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE WITH XMP, PYROPHOSPHATE AND TWO MG2+ IONS

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	NSLS BEAMLINE X25
Synchrotron site	NSLS
Beamline	X25
Temperature [K]	100
Detector technology	CCD
Collection date	1998-02-15
Detector	PRINCETON SCIENTIFIC INSTRUMENTS 2K CCD
Spacegroup name	C 2 2 21
Unit cell lengths	55.208, 112.255, 144.280
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	13.000 - 1.600
Rwork	0.234
R-free	0.26099
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	1qk3 SUBUNIT A WITHOUT LOOPS WATERS OR GMP
RMSD bond length	0.015
RMSD bond angle	0.040
Data reduction software	MOSFLM
Data scaling software	SCALA
Phasing software	AMoRE
Refinement software	REFMAC

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	13.000	1.660
High resolution limit [Å]	1.600	1.600
Rmerge	0.076 *	0.373 *
Total number of observations	245248 *
Number of reflections	58200
<I/σ(I)>	10.3	2.4
Completeness [%]	98.0	93.9
Redundancy	4.2	3.7

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	Vapor diffusion, hanging drop *	8.5	4 *	drop consists of equal volume of protein and reservoir solutions *

Crystallization Reagents in Literatures

ID	crystal ID	solution	reagent name	concentration (unit)	details
1	1	drop	protein	10-20 (mg/ml)
2	1	drop	IMP	1 (mM)
3	1	reservoir	PEG8000	15-20 (%)
4	1	reservoir	potassium phosphate	100 (mM)
5	1	reservoir	octyl-beta-D-glucopyranoside	0.25 (%)