6WMM

Human poly-N-acetyl-lactosamine synthase structure demonstrates a modular assembly of catalytic subsites for GT-A glycosyltransferases

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	APS BEAMLINE 22-ID
Synchrotron site	APS
Beamline	22-ID
Temperature [K]	100
Detector technology	CCD
Collection date	2016-02-15
Detector	RAYONIX MX300-HS
Wavelength(s)	0.95
Spacegroup name	P 21 21 21
Unit cell lengths	48.730, 110.920, 147.400
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	35.860 - 1.548
R-factor	0.1782
Rwork	0.177
R-free	0.19840
Structure solution method	SAD
RMSD bond length	0.017
RMSD bond angle	1.346
Data reduction software	XDS
Data scaling software	XSCALE
Phasing software	PHASER (2.6.0)
Refinement software	PHENIX (1.12_2829)

Data quality characteristics

	Overall	Inner shell	Outer shell
Low resolution limit [Å]	35.862	35.862	1.590
High resolution limit [Å]	1.548	6.920	1.550
Rmerge	0.086
Rmeas	0.093	0.037
Number of reflections	224051	2507	15467
<I/σ(I)>	12.97	43.17	0.89
Completeness [%]	99.4	99.8	92.6
Redundancy	7.592	7.277	7.035
CC(1/2)	0.999	0.998	0.436

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, HANGING DROP	7.5	293	16% PEG3350, 16% Ethylene glycol, 100 mM Hepes pH 7.5