1IAQ

C-H-RAS P21 PROTEIN MUTANT WITH THR 35 REPLACED BY SER (T35S) COMPLEXED WITH GUANOSINE-5'-[B,G-IMIDO] TRIPHOSPHATE

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	ROTATING ANODE
Source details	ENRAF-NONIUS FR571
Temperature [K]	298
Detector technology	IMAGE PLATE
Collection date	2000-02-03
Detector	MARRESEARCH
Wavelength(s)	1.5481
Spacegroup name	P 21 21 21
Unit cell lengths	63.890, 79.060, 94.040
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	25.000 - 2.900
R-factor	0.242 *
Rwork	0.242
R-free	0.28200
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	5p21
RMSD bond length	0.008
RMSD bond angle	1.200
Data scaling software	XDS
Phasing software	AMoRE
Refinement software	CNS

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	50.000 *	3.000
High resolution limit [Å]	2.900	2.900
Rmerge	0.204	0.387
Total number of observations	60892 *
Number of reflections	10369 *
<I/σ(I)>	7.13	1.8
Completeness [%]	95.2	91.6
Redundancy	6.2	4.9

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	Vapor diffusion *	7.5	293	PEG1500, calcium chloride, Tris, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 293.0K
1	Vapor diffusion *	7.5	293	PEG1500, calcium chloride, Tris, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 293.0K

Crystallization Reagents in Literatures

ID	crystal ID	solution	reagent name	concentration (unit)	details
1	1	reservoir	PEG1500	24 (%)
2	1	reservoir		50 (mM)
3	1	reservoir	Tris	100 (mM)
4	1	drop	protein	20 (mg/ml)