1CI7 | pdb_00001ci7

TERNARY COMPLEX OF THYMIDYLATE SYNTHASE FROM PNEUMOCYSTIS CARINII

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other		unpublished C. neoformans Thymidylate Synthase structure

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7.4		100 UM ENZYME, 2 MM DUMP, 2 MM CB3717, 1 MM DTT OVER 14.5 % PEG 8000, 0.25 M ( NH4)2SO4, 5 MM DTT, 0.1 M TRIS, PH 7.4

Crystal Properties
Matthews coefficient	Solvent content
2.3	42

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 66.16	α = 90
b = 178.76	β = 90
c = 54.05	γ = 90

Symmetry
Space Group	P 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	IMAGE PLATE	MARRESEARCH	MIRROR	1993-03-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL7-1		SSRL	BL7-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.6	50	82	12.7	5.9	3		15344			19

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.6	2.69	69.3		29.9	2.06	2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	C. NEOFORMANS TS	2.6	50	2	15344	1518	75.3	0.221	0.221	0.294	RANDOM	23

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]
4.23			7.49		-11.6

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	23.8
c_scangle_it	4.42
c_mcangle_it	3.43
c_scbond_it	2.94
c_mcbond_it	2.1
c_angle_deg	1.8
c_improper_angle_d	0.99
c_bond_d	0.01
c_bond_d_na
c_bond_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4754
Nucleic Acid Atoms
Solvent Atoms	196
Heterogen Atoms	75

Software

Software
Software Name	Purpose
X-PLOR	model building
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	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.