1NHE

Crystal structure of Lactose synthase complex with UDP

Replaces:  1J94

Experimental procedure

Experimental method	MAD
Source type	SYNCHROTRON
Source details	NSLS BEAMLINE X9B
Synchrotron site	NSLS
Beamline	X9B
Temperature [K]	100
Detector technology	CCD
Collection date	2000-06-12
Detector	ADSC QUANTUM 4
Wavelength(s)	0.97894, 0.97855,0.96334
Spacegroup name	P 1 21 1
Unit cell lengths	55.171, 99.013, 102.382
Unit cell angles	90.00, 103.92, 90.00

Refinement procedure

Resolution	19.900 - 2.500
R-factor	0.197
Rwork	0.197
R-free	0.30000 *
Structure solution method	MAD
RMSD bond length	0.008 *
RMSD bond angle	1.500 *
Data reduction software	DENZO
Data scaling software	SCALEPACK
Phasing software	SOLVE
Refinement software	CNS (1.0)

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	20.000	2.590
High resolution limit [Å]	2.500	2.500
Rmerge	0.050 *
Total number of observations	110000 *
Number of reflections	37099 *
<I/σ(I)>	13.6	2
Completeness [%]	98.0 *	71
Redundancy	4	4

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, HANGING DROP	5.6 *	298	Sodium citrate, PEG 4000, pH 5.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystallization Reagents in Literatures

ID	crystal ID	solution	reagent name	concentration (unit)	details
1	1	drop	beta4Gal-T1	20 (mg/ml)
2	1	drop	LA	10 (mg/ml)
3	1	reservoir		100 (mM)
4	1	reservoir	sodium citrate	100 (mM)	pH5.6
5	1	reservoir	PEG4000	12.5 (%(w/v))
6	1	drop	UDP-Gal	100 (mM)