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- PDB-1an5: E. COLI THYMIDYLATE SYNTHASE IN COMPLEX WITH CB3717 -

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Basic information

Entry
Database: PDB / ID: 1an5
TitleE. COLI THYMIDYLATE SYNTHASE IN COMPLEX WITH CB3717
ComponentsTHYMIDYLATE SYNTHASE
KeywordsMETHYLTRANSFERASE / TRANSFERASE (METHYLTRANSFERASE) / SUBSTRATE MODULES
Function / homology
Function and homology information


thymidylate synthase / thymidylate synthase activity / dTMP biosynthetic process / dTTP biosynthetic process / response to radiation / regulation of translation / methylation / magnesium ion binding / protein homodimerization activity / RNA binding / cytosol
Similarity search - Function
Thymidylate Synthase; Chain A / Thymidylate synthase/dCMP hydroxymethylase domain / Thymidylate synthase, active site / Thymidylate synthase active site. / Thymidylate synthase / Thymidylate synthase/dCMP hydroxymethylase / Thymidylate synthase/dCMP hydroxymethylase domain / Thymidylate synthase/dCMP hydroxymethylase superfamily / Thymidylate synthase / 2-Layer Sandwich / Alpha Beta
Similarity search - Domain/homology
10-PROPARGYL-5,8-DIDEAZAFOLIC ACID / PHOSPHATE ION / Thymidylate synthase
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
MethodX-RAY DIFFRACTION / DIFFERENCE FOURIER / Resolution: 2.6 Å
AuthorsStout, T.J. / Sage, C.R. / Stroud, R.M.
CitationJournal: Structure / Year: 1998
Title: The additivity of substrate fragments in enzyme-ligand binding.
Authors: Stout, T.J. / Sage, C.R. / Stroud, R.M.
History
DepositionJun 26, 1997Processing site: BNL
Revision 1.0Jul 1, 1998Provider: repository / Type: Initial release
Revision 1.1Mar 24, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Aug 2, 2023Group: Database references / Derived calculations ...Database references / Derived calculations / Other / Refinement description
Category: database_2 / pdbx_database_status ...database_2 / pdbx_database_status / pdbx_initial_refinement_model / struct_conn / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_database_status.process_site / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_label_asym_id / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: THYMIDYLATE SYNTHASE
B: THYMIDYLATE SYNTHASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)62,2326
Polymers61,0872
Non-polymers1,1454
Water3,099172
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area7490 Å2
ΔGint-37 kcal/mol
Surface area19410 Å2
MethodPISA
Unit cell
Length a, b, c (Å)127.300, 127.300, 67.930
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number173
Space group name H-MP63
Noncrystallographic symmetry (NCS)NCS oper: (Code: given
Matrix: (-1, 0.01, -0.009), (-0.013, -0.628, 0.778), (0.002, 0.778, 0.629)
Vector: 61.896, 22.84, -10.9)

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Components

#1: Protein THYMIDYLATE SYNTHASE / TS / THYMIDYLATE SYNTHETASE


Mass: 30543.662 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli) / Cell line: CHI-2913 / Gene: THYA / Plasmid: PTHYA-WT / Cell line (production host): CHI-2913 / Gene (production host): THYA / Production host: Escherichia coli (E. coli) / References: UniProt: P0A884, thymidylate synthase
#2: Chemical ChemComp-PO4 / PHOSPHATE ION


Mass: 94.971 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: PO4
#3: Chemical ChemComp-CB3 / 10-PROPARGYL-5,8-DIDEAZAFOLIC ACID


Mass: 477.469 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C24H23N5O6
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 172 / Source method: isolated from a natural source / Formula: H2O

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 2.56 Å3/Da / Density % sol: 52.4 %
Crystal growMethod: vapor diffusion, hanging drop / pH: 7.8
Details: CRYSTALLIZATION WAS CONDUCTED IN HANGING DROPS CONTAINING 4.2 MG/ML E. COLI TS, 3.8 MM DTT, 1.0 MM CB3717 AND 1.2 M (NH4)2SO4, PH 7.8 (20 MM KPO4) OVER A WELL SOLUTION CONTAINING 2.4 M (NH4) ...Details: CRYSTALLIZATION WAS CONDUCTED IN HANGING DROPS CONTAINING 4.2 MG/ML E. COLI TS, 3.8 MM DTT, 1.0 MM CB3717 AND 1.2 M (NH4)2SO4, PH 7.8 (20 MM KPO4) OVER A WELL SOLUTION CONTAINING 2.4 M (NH4)2SO4 AND 1.0 MM DTT., vapor diffusion - hanging drop
Crystal
*PLUS
Crystal grow
*PLUS
Method: vapor diffusion, hanging drop
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-ID
14.2 mg/mlprotein1drop
20.38 mMphosphoribose1drop
33.8 mMdithiothreitol1drop
41.0 mMCB37171drop
51.2 Mammonium sulfate1drop
620 mMpotassium phosphate1drop
72.4 Mammonium sulfate1reservoir
81.0 mMdithiothreitol1reservoir

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Data collection

DiffractionMean temperature: 298 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RUH2R / Wavelength: 1.5418
DetectorType: RIGAKU / Detector: IMAGE PLATE / Date: Nov 1, 1996
RadiationMonochromator: GRAPHITE(002) / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2.6→50 Å / Num. obs: 19522 / % possible obs: 97.4 % / Observed criterion σ(I): 0 / Redundancy: 5.8 % / Biso Wilson estimate: 19.5 Å2 / Rmerge(I) obs: 0.096 / Rsym value: 0.096 / Net I/σ(I): 10.6
Reflection shellResolution: 2.6→2.68 Å / Redundancy: 4.2 % / Rmerge(I) obs: 0.28 / Mean I/σ(I) obs: 3.2 / Rsym value: 0.28 / % possible all: 94.3
Reflection
*PLUS
Num. measured all: 76707

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Processing

Software
NameVersionClassification
X-PLOR3.843model building
X-PLOR3.843refinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLOR3.843phasing
RefinementMethod to determine structure: DIFFERENCE FOURIER
Starting model: PDB ENTRY 1KCE

1kce


Resolution: 2.6→8 Å / Rfactor Rfree error: 0.006 / Data cutoff high absF: 10000000 / Data cutoff low absF: 0.001 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 2
RfactorNum. reflection% reflectionSelection details
Rfree0.266 1722 9.9 %SHELLS
Rwork0.193 ---
obs0.193 17427 92.7 %-
Displacement parametersBiso mean: 18.5 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.34 Å0.24 Å
Luzzati d res low-5 Å
Luzzati sigma a0.4 Å0.26 Å
Refinement stepCycle: LAST / Resolution: 2.6→8 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4306 0 88 172 4566
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONx_bond_d0.008
X-RAY DIFFRACTIONx_bond_d_na
X-RAY DIFFRACTIONx_bond_d_prot
X-RAY DIFFRACTIONx_angle_d
X-RAY DIFFRACTIONx_angle_d_na
X-RAY DIFFRACTIONx_angle_d_prot
X-RAY DIFFRACTIONx_angle_deg1.6
X-RAY DIFFRACTIONx_angle_deg_na
X-RAY DIFFRACTIONx_angle_deg_prot
X-RAY DIFFRACTIONx_dihedral_angle_d25
X-RAY DIFFRACTIONx_dihedral_angle_d_na
X-RAY DIFFRACTIONx_dihedral_angle_d_prot
X-RAY DIFFRACTIONx_improper_angle_d1.74
X-RAY DIFFRACTIONx_improper_angle_d_na
X-RAY DIFFRACTIONx_improper_angle_d_prot
X-RAY DIFFRACTIONx_mcbond_it2.881.5
X-RAY DIFFRACTIONx_mcangle_it4.372
X-RAY DIFFRACTIONx_scbond_it3.372
X-RAY DIFFRACTIONx_scangle_it4.922.5
LS refinement shellResolution: 2.6→2.76 Å / Rfactor Rfree error: 0.018 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.294 281 10.4 %
Rwork0.219 2412 -
obs--86.1 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PARHCSDX.PROTOPHCSDX.PRO
X-RAY DIFFRACTION2PARAM11.SOLTOPH11.SOL
X-RAY DIFFRACTION3PARAM.PHSTOPO.PHS
X-RAY DIFFRACTION4PARAMED.LIGTOPO.CB, TOPO.FORMIC
Software
*PLUS
Name: X-PLOR / Version: 3.843 / Classification: refinement
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_dihedral_angle_d
X-RAY DIFFRACTIONx_dihedral_angle_deg25
X-RAY DIFFRACTIONx_improper_angle_d
X-RAY DIFFRACTIONx_improper_angle_deg1.74

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