7NXN

CRYSTAL STRUCTURE OF HUMAN CYTOSOLIC BRANCHED-CHAIN AMINOTRANSFERASE (BCAT1) IN COMPLEX WITH PLP AND SMALL MOLECULE INHIBITOR COMPOUND 21(5-F)

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	PETRA III, DESY BEAMLINE P11
Synchrotron site	PETRA III, DESY
Beamline	P11
Temperature [K]	100
Detector technology	PIXEL
Collection date	2017-10-20
Detector	DECTRIS PILATUS 6M
Wavelength(s)	1.0332
Spacegroup name	P 21 21 21
Unit cell lengths	66.723, 106.188, 109.326
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	41.550 - 1.700
R-factor	0.1904
Rwork	0.190
R-free	0.22370
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	2abj
RMSD bond length	0.007
RMSD bond angle	1.381
Data reduction software	XDS (Jun 1, 2017)
Data scaling software	pointless (1.10.18)
Phasing software	PHASER
Refinement software	REFMAC (5.8.0267)

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	47.760	1.800
High resolution limit [Å]	1.700	1.700
Rmeas	0.063	1.296
Number of reflections	85902	13650
<I/σ(I)>	20.6	1.6
Completeness [%]	99.7	99.2
Redundancy	6.6	6.5
CC(1/2)	1.000	0.709

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, HANGING DROP	8	293	PROTEIN AT 17 MG/ML IN 10 MILLIMOLAR TRIS-HCL PH 8.0, 100 MILLIMOLAR NACL, 3 MILLIMOLAR DTT. PROTEIN PREINCUBATED OVER NIGHT AT 293 K WITH 10 MILLIMOLAR 3-PHENYL-PROPIONATE, 3 MILLIMOLAR DTT AND 1.5 MILLIMOLAR PLP. DROPS MADE FROM 1 MICROLITER PROTEIN AND 1 MICROLITER RESERVOIR (225 MILLIMOLAR MGCL2, 16-20 % (W/V) PEG 3350). INHIBITOR SOAKED INTO PREFORMED CRYSTALS FOR 1 DAY AT 10 MILLIMOLAR. CRYO: RESERVOIR SOLUTION COMPLEMENTED WITH 20 % (V/V) GLYCEROL AND 10 MILLIMOLAR INHIBITOR.