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- PDB-1axw: E. COLI THYMIDYLATE SYNTHASE IN COMPLEX WITH METHOTREXATE (MTX) A... -

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Basic information

Entry
Database: PDB / ID: 1axw
TitleE. COLI THYMIDYLATE SYNTHASE IN COMPLEX WITH METHOTREXATE (MTX) AND 2'-DEOXYURIDINE 5'-MONOPHOSPHATE (DUMP)
ComponentsTHYMIDYLATE SYNTHASE
KeywordsMETHYLTRANSFERASE / TRANSFERASE / INHIBITOR
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
METHOTREXATE / 2'-DEOXYURIDINE 5'-MONOPHOSPHATE / Thymidylate synthase
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
MethodX-RAY DIFFRACTION / DIFFERENCE FOURIER / Resolution: 1.7 Å
AuthorsStout, T.J. / Sage, C.R. / Stroud, R.M.
Citation
Journal: To be Published
Title: Discovery of Thymidylate Synthase Inhibitors Using Flexible Docking and an Empirically Tuned Scoring Function
Authors: Welch, W. / Sage, C.R. / Stout, T.J. / Klein, T. / Ruppert, J. / Stroud, R.M. / Jain, A.
#1: Journal: Biochemistry / Year: 1990
Title: Erratum. Structure, Multiple Site Binding, and Segmental Accommodation in Thymidylate Synthase on Binding Dump and an Anti-Folate
Authors: Montfort, W.R. / Perry, K.M. / Fauman, E.B. / Finer-Moore, J.S. / Maley, G.F. / Hardy, L. / Maley, F. / Stroud, R.M.
#2: Journal: Biochemistry / Year: 1990
Title: Structure, Multiple Site Binding, and Segmental Accommodation in Thymidylate Synthase on Binding Dump and an Anti-Folate
Authors: Montfort, W.R. / Perry, K.M. / Fauman, E.B. / Finer-Moore, J.S. / Maley, G.F. / Hardy, L. / Maley, F. / Stroud, R.M.
History
DepositionOct 23, 1997Processing site: BNL
Revision 1.0Oct 28, 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

Downloads & links

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Assembly

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


Theoretical massNumber of molelcules
Total (without water)62,6136
Polymers61,0872
Non-polymers1,5254
Water3,387188
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area8260 Å2
ΔGint-22 kcal/mol
Surface area19230 Å2
MethodPISA
Unit cell
Length a, b, c (Å)127.340, 127.340, 68.060
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: (-0.999955, 0.008067, -0.00498), (-0.008931, -0.625512, 0.780163), (0.003178, 0.780173, 0.625556)
Vector: 61.8486, 22.0593, -10.4829)

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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: X2913 / Gene: THYA / Plasmid: PTHYA-WT / Gene (production host): THYA / Production host: Escherichia coli (E. coli) / References: UniProt: P0A884, thymidylate synthase
#2: Chemical ChemComp-UMP / 2'-DEOXYURIDINE 5'-MONOPHOSPHATE / DUMP


Mass: 308.182 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C9H13N2O8P
#3: Chemical ChemComp-MTX / METHOTREXATE


Mass: 454.439 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C20H22N8O5 / Comment: chemotherapy*YM
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 188 / 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 growpH: 7.8
Details: 4.2 MG/ML E.COLI TS, 0.38 MM DUMP, 3.8 MM DTT, 1.0 MM MTX AND 1.2 M (NH4)2SO4, PH 7.8 (20 MM KPO4) OVER 2.4 M (NH4)2SO4 AND 1.0 MM DTT

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Data collection

DiffractionMean temperature: 278 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RUH2R / Wavelength: 1.5418
DetectorType: RIGAKU RAXIS IIC / Detector: IMAGE PLATE / Date: Nov 25, 1996
RadiationMonochromator: GRAPHITE(002) / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 1.7→50 Å / Num. obs: 69189 / % possible obs: 78.3 % / Observed criterion σ(I): 1 / Redundancy: 7.9 % / Biso Wilson estimate: 10.5 Å2 / Rmerge(I) obs: 0.09 / Net I/σ(I): 16
Reflection shellResolution: 1.7→1.75 Å / Redundancy: 3 % / Rmerge(I) obs: 0.344 / Mean I/σ(I) obs: 3 / % possible all: 70.1

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Processing

Software
NameVersionClassification
X-PLORmodel building
X-PLOR3.854refinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing
RefinementMethod to determine structure: DIFFERENCE FOURIER
Starting model: PDB ENTRY 1KCE

1kce


Resolution: 1.7→50 Å / Rfactor Rfree error: 0.005 / 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
Rfree0.265 4363 6.3 %SHELLS
Rwork0.217 ---
obs0.217 69189 78.3 %-
Displacement parametersBiso mean: 29 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.32 Å0.3 Å
Luzzati d res low-5 Å
Luzzati sigma a0.59 Å0.48 Å
Refinement stepCycle: LAST / Resolution: 1.7→50 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4306 0 118 188 4612
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_deg1.5
X-RAY DIFFRACTIONx_angle_deg_na
X-RAY DIFFRACTIONx_angle_deg_prot
X-RAY DIFFRACTIONx_dihedral_angle_d25.2
X-RAY DIFFRACTIONx_dihedral_angle_d_na
X-RAY DIFFRACTIONx_dihedral_angle_d_prot
X-RAY DIFFRACTIONx_improper_angle_d1.18
X-RAY DIFFRACTIONx_improper_angle_d_na
X-RAY DIFFRACTIONx_improper_angle_d_prot
X-RAY DIFFRACTIONx_mcbond_it2.981.5
X-RAY DIFFRACTIONx_mcangle_it4.222
X-RAY DIFFRACTIONx_scbond_it3.962
X-RAY DIFFRACTIONx_scangle_it5.862.5
LS refinement shellResolution: 1.7→1.81 Å / Rfactor Rfree error: 0.016 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.336 861 10.2 %
Rwork0.352 8780 -
obs--77 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PARHCSDX.PROTOPHCSDX.PRO
X-RAY DIFFRACTION2PARAM19.SOLTOPH19.SOL
X-RAY DIFFRACTION3SAGE_PARAMED.LIGTOPO.DUMP
X-RAY DIFFRACTION4TOPO2.MTX

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