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- PDB-2pbr: Crystal structure of thymidylate kinase (aq_969) from Aquifex Aeo... -

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Basic information

Entry
Database: PDB / ID: 2pbr
TitleCrystal structure of thymidylate kinase (aq_969) from Aquifex Aeolicus VF5
ComponentsThymidylate kinase
KeywordsTRANSFERASE / KINASE / NUCLEOTIDE BIOSYNTHESIS / TMP-BINDING / ATP-BINDING / Structural Genomics / NPPSFA / National Project on Protein Structural and Functional Analyses / RIKEN Structural Genomics/Proteomics Initiative / RSGI
Function / homology
Function and homology information


dTMP kinase / dUDP biosynthetic process / dTDP biosynthetic process / dTMP kinase activity / dTTP biosynthetic process / ATP binding / cytoplasm / cytosol
Similarity search - Function
Thymidylate kinase, conserved site / Thymidylate kinase signature. / Thymidylate kinase / Thymidylate kinase-like domain / Thymidylate kinase / P-loop containing nucleotide triphosphate hydrolases / Rossmann fold / P-loop containing nucleoside triphosphate hydrolase / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
Biological speciesAquifex aeolicus (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.96 Å
AuthorsJeyakanthan, J. / Kanaujia, S.P. / Vasuki Ranjani, C. / Sekar, K. / Nakagawa, N. / Ebihara, A. / Kuramitsu, S. / Shinkai, A. / Shiro, Y. / Yokoyama, S. / RIKEN Structural Genomics/Proteomics Initiative (RSGI)
CitationJournal: To be Published
Title: Crystal structure of thymidylate kinase (aq_969) from Aquifex Aeolicus VF5
Authors: Jeyakanthan, J. / Kanaujia, S.P. / Vasuki Ranjani, C. / Sekar, K. / Nakagawa, N. / Ebihara, A. / Kuramitsu, S. / Shinkai, A. / Shiro, Y. / Yokoyama, S.
History
DepositionMar 29, 2007Deposition site: RCSB / Processing site: PDBJ
Revision 1.0Oct 2, 2007Provider: repository / Type: Initial release
Revision 1.1Jul 13, 2011Group: Derived calculations / Source and taxonomy / Version format compliance
Revision 1.2Oct 25, 2023Group: Data collection / Database references / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Thymidylate kinase
B: Thymidylate kinase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)44,9984
Polymers44,8062
Non-polymers1922
Water5,765320
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
2
A: Thymidylate kinase
hetero molecules

B: Thymidylate kinase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)44,9984
Polymers44,8062
Non-polymers1922
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation1_545x,y-1,z1
Buried area2570 Å2
ΔGint-56 kcal/mol
Surface area18060 Å2
MethodPISA, PQS
Unit cell
Length a, b, c (Å)42.765, 50.478, 52.823
Angle α, β, γ (deg.)95.19, 90.81, 111.68
Int Tables number1
Space group name H-MP1

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Components

#1: Protein Thymidylate kinase / dTMP kinase


Mass: 22402.961 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Aquifex aeolicus (bacteria) / Strain: VF5 / Plasmid: PET21A / Production host: Escherichia coli (E. coli) / Strain (production host): BL-21 CONDON PLUS (DE3)-RIL / References: UniProt: O67099, dTMP kinase
#2: Chemical ChemComp-SO4 / SULFATE ION


Mass: 96.063 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: SO4
#3: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 320 / 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: 2.35 Å3/Da / Density % sol: 47.7 %
Crystal growTemperature: 293 K / Method: vapor diffusion, sitting drop / pH: 6.6
Details: 0.1 M ADA, 0.05 M Lithium Sulfate, 12% PEG 4000, 2% iso-propanol, 3% D(+)-sucrose as additive, pH 6.6, VAPOR DIFFUSION, SITTING DROP, temperature 293K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: SPring-8 / Beamline: BL26B2 / Wavelength: 1 Å
DetectorType: RIGAKU RAXIS V / Detector: IMAGE PLATE / Date: Jun 30, 2006 / Details: RH Coated Bent-Cyrindrical MIRROR
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 1.95→50 Å / Num. all: 75100 / Num. obs: 27384 / % possible obs: 93.9 % / Biso Wilson estimate: 18.2 Å2 / Rmerge(I) obs: 0.042 / Rsym value: 0.051
Reflection shellResolution: 1.95→2.02 Å / Rmerge(I) obs: 0.177 / Num. unique all: 2254 / Rsym value: 0.191 / % possible all: 76.8

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Processing

Software
NameVersionClassification
CNS1.1refinement
HKL-2000data collection
HKL-2000data reduction
SCALEPACKdata scaling
MOLREPphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDN ENTRY 2CCJ

2ccj


Resolution: 1.96→32.48 Å / Rfactor Rfree error: 0.005 / Data cutoff high absF: 4285258.57 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.242 2527 9.6 %RANDOM
Rwork0.194 ---
obs0.194 26353 89.8 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 55.5288 Å2 / ksol: 0.392132 e/Å3
Displacement parametersBiso mean: 29.2 Å2
Baniso -1Baniso -2Baniso -3
1--6.14 Å22.43 Å26.92 Å2
2--2.88 Å211.8 Å2
3---3.26 Å2
Refine analyzeLuzzati coordinate error obs: 0.22 Å / Luzzati sigma a obs: 0.22 Å
Refinement stepCycle: LAST / Resolution: 1.96→32.48 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3156 0 10 320 3486
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.005
X-RAY DIFFRACTIONc_angle_deg1.3
X-RAY DIFFRACTIONc_dihedral_angle_d20.7
X-RAY DIFFRACTIONc_improper_angle_d
LS refinement shellResolution: 1.95→2.04 Å / Rfactor Rfree error: 0.029
RfactorNum. reflection% reflection
Rfree0.297 108 -
Rwork0.264 --
obs--58.3 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1protein_rep.paramprotein.top
X-RAY DIFFRACTION2ligand.paramligand.top
X-RAY DIFFRACTION3ion.paramion.top
X-RAY DIFFRACTION5water_rep.paramwater_protin.top

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