3L6B

X-ray crystal structure of human serine racemase in complex with malonate a potent inhibitor

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other		HUMAN SERINE RACEMASE SOLVED BY SELENOMETHIONINE SAD

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8	295	pH 8, VAPOR DIFFUSION, SITTING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.15	42.73

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 54.57	α = 90
b = 84.29	β = 90
c = 69.98	γ = 90

Symmetry
Space Group	P 21 21 2

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	ADSC QUANTUM 315	MIRROR	2008-10-29	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I04	0.97960	Diamond	I04

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	38.32	99	0.049	0.049	13.9	3.7		52035	2	1.5	15.9

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)
	1.5	1.58	100		0.275	0.275	4.4	3.7	49358

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	HUMAN SERINE RACEMASE SOLVED BY SELENOMETHIONINE SAD	1.5	36.11	1.5	2	49358	49358	2649	98.6	0.161	0.161	0.16	0.177	RANDOM	12.53

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]
0.05			-0.04		-0.01

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	42.297
r_dihedral_angle_4_deg	13.949
r_dihedral_angle_3_deg	11.217
r_dihedral_angle_1_deg	5.263
r_scangle_it	3.17
r_scbond_it	2.18
r_mcangle_it	1.525
r_angle_refined_deg	1.169
r_mcbond_it	0.965
r_nbtor_refined	0.302

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	42.297
r_dihedral_angle_4_deg	13.949
r_dihedral_angle_3_deg	11.217
r_dihedral_angle_1_deg	5.263
r_scangle_it	3.17
r_scbond_it	2.18
r_mcangle_it	1.525
r_angle_refined_deg	1.169
r_mcbond_it	0.965
r_nbtor_refined	0.302
r_nbd_refined	0.207
r_symmetry_vdw_refined	0.137
r_xyhbond_nbd_refined	0.111
r_symmetry_hbond_refined	0.081
r_chiral_restr	0.074
r_bond_refined_d	0.008
r_gen_planes_refined	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2432
Nucleic Acid Atoms
Solvent Atoms	217
Heterogen Atoms	23

Software

Software
Software Name	Purpose
CrystalClear	data collection
PHASER	phasing
REFMAC	refinement
MOSFLM	data reduction
SCALA	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.