3FFR

CRYSTAL STRUCTURE OF A PHOSPHOSERINE AMINOTRANSFERASE SERC (CHU_0995) FROM CYTOPHAGA HUTCHINSONII ATCC 33406 AT 1.75 A RESOLUTION

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7	277	5.0000% PEG-1000, 40.0000% PEG-300, 0.1M TRIS pH 7.0, NANODROP, VAPOR DIFFUSION, SITTING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
3.18	61.37

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 79.23	α = 90
b = 79.23	β = 90
c = 144.59	γ = 120

Symmetry
Space Group	P 31 2 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	CCD	MARMOSAIC 325 mm CCD	Flat mirror (vertical focusing)	2008-11-12	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL11-1	0.91837,0.97870,0.97821	SSRL	BL11-1

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	1.75	26.698	99.6	0.051	16.32			53599		-3	24.896

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	1.75	1.81	97.5		0.578	2.3

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	1.75	26.698	53552	2716	99.66	0.144	0.143	0.162	RANDOM	33.319

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]
-0.93	-0.46		-0.93		1.39

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.47
r_dihedral_angle_4_deg	20.981
r_dihedral_angle_3_deg	10.424
r_scangle_it	6.539
r_scbond_it	4.233
r_dihedral_angle_1_deg	4.206
r_mcangle_it	2.227
r_angle_refined_deg	1.675
r_mcbond_it	1.445
r_angle_other_deg	1.431

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.47
r_dihedral_angle_4_deg	20.981
r_dihedral_angle_3_deg	10.424
r_scangle_it	6.539
r_scbond_it	4.233
r_dihedral_angle_1_deg	4.206
r_mcangle_it	2.227
r_angle_refined_deg	1.675
r_mcbond_it	1.445
r_angle_other_deg	1.431
r_mcbond_other	0.477
r_chiral_restr	0.102
r_bond_refined_d	0.015
r_gen_planes_refined	0.008
r_gen_planes_other	0.003
r_bond_other_d	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2843
Nucleic Acid Atoms
Solvent Atoms	390
Heterogen Atoms	123

Software

Software
Software Name	Purpose
REFMAC	refinement
PHENIX	refinement
SHELX	phasing
MolProbity	model building
XSCALE	data scaling
PDB_EXTRACT	data extraction
XDS	data reduction
SHELXD	phasing
autoSHARP	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.