7NWC

CRYSTAL STRUCTURE OF HUMAN CYTOSOLIC BRANCHED-CHAIN AMINOTRANSFERASE (BCAT1) IN COMPLEX WITH PLP AND INHIBITOR COMPOUND 2

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 5 DAYS AT 10 MILLIMOLAR. CRYO: RESERVOIR SOLUTION COMPLEMENTED WITH 20 % (V/V) GLYCEROL AND 10 MILLIMOLAR INHIBITOR

Crystal Properties
Matthews coefficient	Solvent content
2.69	54.34

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 81.069	α = 90
b = 110.431	β = 103.2
c = 107.043	γ = 90

Symmetry
Space Group	P 1 21 1

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 PILATUS3 6M		2016-08-17	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	BESSY BEAMLINE 14.1	0.9184	BESSY	14.1

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	2.38	47.12	98.5	0.219	0.983	6.45	3.44		72443			33.37

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Rrim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.38	2.52	96.2		0.911	0.639	1.65	3.49

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	2.38	45.24	70342	2101	98.5	0.2218	0.2206	0.2626	RANDOM	35.883

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]
1.77		3.36	-2.75		-0.53

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.214
r_dihedral_angle_4_deg	17.993
r_dihedral_angle_3_deg	14.822
r_dihedral_angle_1_deg	6.818
r_angle_refined_deg	1.243
r_angle_other_deg	1.09
r_chiral_restr	0.044
r_bond_refined_d	0.004
r_gen_planes_refined	0.004
r_bond_other_d	0.001

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.214
r_dihedral_angle_4_deg	17.993
r_dihedral_angle_3_deg	14.822
r_dihedral_angle_1_deg	6.818
r_angle_refined_deg	1.243
r_angle_other_deg	1.09
r_chiral_restr	0.044
r_bond_refined_d	0.004
r_gen_planes_refined	0.004
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	11532
Nucleic Acid Atoms
Solvent Atoms	510
Heterogen Atoms	152

Software

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

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.