1BIQ

RIBONUCLEOSIDE-DIPHOSPHATE REDUCTASE 1 BETA CHAIN MUTANT E238A

Experimental procedure

Source type	SYNCHROTRON
Source details	SRS BEAMLINE PX7.2
Synchrotron site	SRS
Beamline	PX7.2
Temperature [K]	100
Detector technology	IMAGE PLATE
Collection date	1996-05
Detector	MARRESEARCH
Spacegroup name	P 21 21 21
Unit cell lengths	74.053, 83.780, 113.953
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	25.000 - 2.050
R-factor	0.192
Rwork	0.191
R-free	0.26600 *
Structure solution method	DIFFERENCE FOURIER WITH INITIAL REFINEMENT
Starting model (for MR)	DIFERROUS FORM OF R2 PROTEIN PDB ENTRY 1XIK
RMSD bond length	0.014
RMSD bond angle	16.800 *
Data reduction software	DENZO
Data scaling software	SCALEPACK
Phasing software	TNT
Refinement software	TNT (5E)

Data quality characteristics

	Overall
Low resolution limit [Å]	27.000
High resolution limit [Å]	2.050
Rmerge	0.081
Number of reflections	161734
<I/σ(I)>	16.4
Completeness [%]	98.3
Redundancy	3.7

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	Vapor diffusion, hanging drop *	6	20 *	pH 6.0

Crystallization Reagents in Literatures

ID	crystal ID	solution	reagent name	concentration (unit)	details
1	1	drop	protein	20 (mg/ml)
2	1	reservoir	PEG4000	20 (%)
3	1	reservoir		0.2 (M)
4	1	reservoir	dioxane	3 (%)
5	1	reservoir	MES	0.05 (M)