Experiment: 4DBC

Substrate Activation in Aspartate Aminotransferase

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	293	2 uL of protein solution(15-20 mg/ml, 50 mM TEA, pH 7.5, 100 mM KCL, 2 mM DTT, 10 mM deaza-PLP, 50 mM L-aspartate) mixed with 2 uL reservoir buffer (53-60% saturated ammonium sulfate and 50 mM TEA), VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.93	57.98

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 84.29	α = 90
b = 155.25	β = 90
c = 77.96	γ = 90

Symmetry
Space Group	C 2 2 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray		CCD	MARMOSAIC 325 mm CCD		2010-02-03	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-2		SSRL	BL9-2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym I (Observed)	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	1.5	28.617	98.7	0.038	0.038	17.7	4.24	81931	80890		-3

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.5	1.54	93.9		0.543	0.543	2.03	2.73

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	1.5	28.617	1.35	80854	4061	98.74	0.1704	0.1692	0.1694	0.1935	0.1917

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]
1.3233			-0.8079		-0.5153

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	12.866
f_angle_d	1.607
f_chiral_restr	0.115
f_bond_d	0.016
f_plane_restr	0.01

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3065
Nucleic Acid Atoms
Solvent Atoms	447
Heterogen Atoms	48

Software

Software
Software Name	Purpose
MOLREP	phasing
PHENIX	refinement
DENZO	data reduction
SCALA	data scaling