3CSW

Crystal structure of a putative branched-chain amino acid aminotransferase (TM0831) from Thermotoga maritima at 2.15 A resolution

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	4.03	277	NANODROP, 52.0% 2-methyl-2,4-pentanediol, 0.1M Citric acid pH 4.03, VAPOR DIFFUSION, SITTING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
3.98	69.11

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 107.71	α = 90
b = 129.76	β = 90
c = 298.69	γ = 90

Symmetry
Space Group	I 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	CCD	MARMOSAIC 325 mm CCD	Flat collimating mirror, toroid focusing mirror	2008-01-13	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-2	0.91162, 0.97961, 0.97975	SSRL	BL9-2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	2.15	29.748	97.1	0.073	8.94			111860		-3	35.759

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.15	2.23	92.5		0.657	1.2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	MAD	THROUGHOUT	2.15	29.748	111840	5612	98.62	0.168	0.167	0.2	RANDOM	31.506

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]
-0.84			1.11		-0.27

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.405
r_dihedral_angle_4_deg	17.318
r_dihedral_angle_3_deg	13.186
r_scangle_it	6.78
r_dihedral_angle_1_deg	5.144
r_scbond_it	4.719
r_mcangle_it	2.931
r_mcbond_it	1.859
r_angle_refined_deg	1.508
r_angle_other_deg	1.029
r_mcbond_other	0.516
r_symmetry_vdw_refined	0.277
r_symmetry_vdw_other	0.248
r_nbd_refined	0.199
r_nbd_other	0.195
r_xyhbond_nbd_refined	0.18
r_nbtor_refined	0.177
r_xyhbond_nbd_other	0.174
r_symmetry_hbond_refined	0.165
r_chiral_restr	0.097
r_nbtor_other	0.083
r_bond_refined_d	0.014
r_gen_planes_refined	0.005
r_bond_other_d	0.002
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	8737
Nucleic Acid Atoms
Solvent Atoms	621
Heterogen Atoms	145

Software

Software
Software Name	Purpose
REFMAC	refinement
PHENIX	refinement
SHELX	phasing
MolProbity	model building
XSCALE	data scaling
PDB_EXTRACT	data extraction
MAR345	data collection
XDS	data reduction
SHARP	phasing
SHELXD	phasing