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- PDB-2aa0: Crystal structure of T. gondii adenosine kinase complexed with 6-... -

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Basic information

Entry
Database: PDB / ID: 2aa0
TitleCrystal structure of T. gondii adenosine kinase complexed with 6-methylmercaptopurine riboside
Componentsadenosine kinase
KeywordsSIGNALING PROTEIN / TRANSFERASE / ribokinase fold / alpha/beta / intermediate conformation
Function / homology
Function and homology information


adenosine kinase / adenosine kinase activity / AMP salvage / purine ribonucleoside salvage / phosphorylation / ATP binding / metal ion binding
Similarity search - Function
Adenosine kinase / Adenosine kinase, small domain - #10 / Adenosine kinase, small domain / pfkB family of carbohydrate kinases signature 2. / Carbohydrate/purine kinase, PfkB, conserved site / Carbohydrate kinase PfkB / pfkB family carbohydrate kinase / Ribokinase / Ribokinase-like / UDP-N-acetylmuramoyl-L-alanine:D-glutamate ligase ...Adenosine kinase / Adenosine kinase, small domain - #10 / Adenosine kinase, small domain / pfkB family of carbohydrate kinases signature 2. / Carbohydrate/purine kinase, PfkB, conserved site / Carbohydrate kinase PfkB / pfkB family carbohydrate kinase / Ribokinase / Ribokinase-like / UDP-N-acetylmuramoyl-L-alanine:D-glutamate ligase / 2-Layer Sandwich / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
ACETATE ION / Chem-MTP / Adenosine kinase
Similarity search - Component
Biological speciesToxoplasma gondii (eukaryote)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.75 Å
AuthorsZhang, Y. / el Kouni, M.H. / Ealick, S.E.
CitationJournal: Acta Crystallogr.,Sect.D / Year: 2007
Title: Substrate analogs induce an intermediate conformational change in Toxoplasma gondii adenosine kinase
Authors: Zhang, Y. / El Kouni, M.H. / Ealick, S.E.
History
DepositionJul 13, 2005Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 25, 2006Provider: repository / Type: Initial release
Revision 1.1Apr 30, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Oct 20, 2021Group: Database references / Derived calculations
Category: database_2 / pdbx_struct_conn_angle ...database_2 / pdbx_struct_conn_angle / struct_conn / struct_ref_seq_dif / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_struct_conn_angle.ptnr1_auth_comp_id / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr1_label_atom_id / _pdbx_struct_conn_angle.ptnr1_label_comp_id / _pdbx_struct_conn_angle.ptnr1_label_seq_id / _pdbx_struct_conn_angle.ptnr3_auth_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _pdbx_struct_conn_angle.ptnr3_label_atom_id / _pdbx_struct_conn_angle.ptnr3_label_comp_id / _pdbx_struct_conn_angle.ptnr3_label_seq_id / _pdbx_struct_conn_angle.value / _struct_conn.pdbx_dist_value / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id / _struct_conn.ptnr2_label_seq_id / _struct_ref_seq_dif.details / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id
Revision 1.4Aug 23, 2023Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: adenosine kinase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)41,3217
Polymers40,5841
Non-polymers7376
Water4,486249
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)60.348, 61.701, 91.958
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number19
Cell settingorthorhombic
Space group name H-MP212121

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Components

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Protein , 1 types, 1 molecules A

#1: Protein adenosine kinase / / E.C.2.7.1.20 / AK / Adenosine 5'-phosphotransferase


Mass: 40584.105 Da / Num. of mol.: 1 / Mutation: G270S, S360F, L361T, P362S, C363G
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Toxoplasma gondii (eukaryote) / Gene: AK / Plasmid: pET28a / Species (production host): Escherichia coli / Production host: Escherichia coli BL21(DE3) (bacteria) / Strain (production host): BL21(DE3) / References: UniProt: Q9TVW2, adenosine kinase

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Non-polymers , 5 types, 255 molecules

#2: Chemical ChemComp-CL / CHLORIDE ION / Chloride


Mass: 35.453 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Cl
#3: Chemical ChemComp-NA / SODIUM ION


Mass: 22.990 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Na
#4: Chemical ChemComp-ACT / ACETATE ION / Acetate


Mass: 59.044 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C2H3O2
#5: Chemical ChemComp-MTP / 2-HYDROXYMETHYL-5-(6-METHYLSULFANYL-PURIN-9-YL)-TETRAHYDRO-FURAN-3,4-DIOL / 9-BETA-D-RIBOFURANOSYL-6-METHYLTHIOPURINE


Mass: 298.318 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C11H14N4O4S
#6: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 249 / 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: 2.1 Å3/Da / Density % sol: 41.8 %
Crystal growTemperature: 295 K / Method: vapor diffusion, hanging drop / pH: 6.5
Details: PEG 4000, ammonium acetate, sodium citrate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 295K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: APS / Beamline: 8-BM / Wavelength: 0.979 Å
DetectorType: ADSC QUANTUM 315 / Detector: CCD / Date: Oct 26, 2004
RadiationMonochromator: GRAPHITE / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.979 Å / Relative weight: 1
ReflectionResolution: 1.75→50 Å / Num. all: 32789 / Num. obs: 32789 / % possible obs: 92.6 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 3.5 % / Biso Wilson estimate: 19.3 Å2 / Rsym value: 0.097 / Net I/σ(I): 12.4
Reflection shellResolution: 1.75→1.81 Å / Redundancy: 3.6 % / Mean I/σ(I) obs: 4.2 / Num. unique all: 3482 / Rsym value: 0.413 / % possible all: 99.7

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Processing

Software
NameClassification
HKL-2000data collection
SCALEPACKdata scaling
CNSrefinement
HKL-2000data reduction
CNSphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB entry 1LIO

1lio


Resolution: 1.75→27.45 Å / Rfactor Rfree error: 0.005 / Data cutoff high absF: 922931.75 / 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
Rfree0.24 2439 8 %RANDOM
Rwork0.204 ---
all0.207 30495 --
obs0.207 30495 86.2 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 55.8055 Å2 / ksol: 0.347877 e/Å3
Displacement parametersBiso mean: 32.6 Å2
Baniso -1Baniso -2Baniso -3
1-13.42 Å20 Å20 Å2
2---8.7 Å20 Å2
3----4.72 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.27 Å0.22 Å
Luzzati d res low-5 Å
Luzzati sigma a0.25 Å0.24 Å
Refinement stepCycle: LAST / Resolution: 1.75→27.45 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms2658 0 47 249 2954
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.005
X-RAY DIFFRACTIONc_angle_deg1.2
X-RAY DIFFRACTIONc_dihedral_angle_d23.3
X-RAY DIFFRACTIONc_improper_angle_d0.76
X-RAY DIFFRACTIONc_mcbond_it2.631.5
X-RAY DIFFRACTIONc_mcangle_it3.332
X-RAY DIFFRACTIONc_scbond_it4.442
X-RAY DIFFRACTIONc_scangle_it5.72.5
LS refinement shellResolution: 1.75→1.86 Å / Rfactor Rfree error: 0.015 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.305 404 7.9 %
Rwork0.267 4696 -
obs--87.9 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1protein_rep.paramprotein.top
X-RAY DIFFRACTION2water_rep.paramwater_rep.top
X-RAY DIFFRACTION3act_param.txtmta_prodrg.top
X-RAY DIFFRACTION4mtp_prodrg.paramact_top.txt
X-RAY DIFFRACTION5ion.paramion.top

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