7NY2

CRYSTAL STRUCTURE OF HUMAN CYTOSOLIC BRANCHED-CHAIN AMINOTRANSFERASE (BCAT1) IN COMPLEX WITH PLP AND SMALL MOLECULE INHIBITOR COMPOUND 35

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2ABJ

Crystallization

Crystalization Experiments
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

Crystal Properties
Matthews coefficient	Solvent content
2.26	45.65

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 67.459	α = 90
b = 104.964	β = 90
c = 110.693	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	PIXEL	DECTRIS PILATUS 6M		2017-10-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PETRA III, DESY BEAMLINE P11	1.0332	PETRA III, DESY	P11

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	Rrim I (All)	CC (Half)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1	2.31	47.42	98	0.075	0.999	19.6	5.88		34312			39.2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Rrim I (All)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.31	2.45	89.8		0.373	4.1	4.5

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2ABJ	2.31	47.42	32595	1716	97.98	0.2097	0.2064	0.2722	RANDOM	32.318

Temperature Factor Modeling
Anisotropic B[1][1]	Anisotropic B[1][2]	Anisotropic B[1][3]	Anisotropic B[2][2]	Anisotropic B[2][3]	Anisotropic B[3][3]
-6.43			2.61		3.82

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.205
r_dihedral_angle_3_deg	16.338
r_dihedral_angle_4_deg	15.347
r_dihedral_angle_1_deg	7.179
r_angle_refined_deg	1.73
r_angle_other_deg	1.189
r_chiral_restr	0.072
r_bond_refined_d	0.01
r_gen_planes_refined	0.008
r_bond_other_d	0.001

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.205
r_dihedral_angle_3_deg	16.338
r_dihedral_angle_4_deg	15.347
r_dihedral_angle_1_deg	7.179
r_angle_refined_deg	1.73
r_angle_other_deg	1.189
r_chiral_restr	0.072
r_bond_refined_d	0.01
r_gen_planes_refined	0.008
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5758
Nucleic Acid Atoms
Solvent Atoms	335
Heterogen Atoms	95

Software

Software
Software Name	Purpose
XDS	data reduction
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
pointless	data scaling

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.