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- PDB-2ou4: Crystal structure of D-tagatose 3-epimerase from Pseudomonas cichorii -

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Basic information

Entry
Database: PDB / ID: 2ou4
TitleCrystal structure of D-tagatose 3-epimerase from Pseudomonas cichorii
ComponentsD-tagatose 3-epimerase
KeywordsISOMERASE / BETA/ALPHA BARREL
Function / homology
Function and homology information


D-tagatose 3-epimerase / isomerase activity / metal ion binding
Similarity search - Function
: / Divalent-metal-dependent TIM barrel enzymes / Xylose isomerase-like, TIM barrel domain / Xylose isomerase-like TIM barrel / Xylose isomerase-like superfamily / TIM Barrel / Alpha-Beta Barrel / Alpha Beta
Similarity search - Domain/homology
: / D-tagatose 3-epimerase
Similarity search - Component
Biological speciesPseudomonas cichorii (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.5 Å
AuthorsYoshida, H. / Yamada, M. / Nishitani, T. / Takada, G. / Izumori, K. / Kamitori, S.
CitationJournal: J.Mol.Biol. / Year: 2007
Title: Crystal structures of D-tagatose 3-epimerase from Pseudomonas cichorii and its complexes with D-tagatose and D-fructose
Authors: Yoshida, H. / Yamada, M. / Nishitani, T. / Takada, G. / Izumori, K. / Kamitori, S.
History
DepositionFeb 9, 2007Deposition site: RCSB / Processing site: PDBJ
Revision 1.0Dec 25, 2007Provider: repository / Type: Initial release
Revision 1.1Jul 13, 2011Group: Version format compliance
Revision 1.2Oct 25, 2023Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _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: D-tagatose 3-epimerase
B: D-tagatose 3-epimerase
C: D-tagatose 3-epimerase
D: D-tagatose 3-epimerase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)130,8498
Polymers130,6304
Non-polymers2204
Water9,692538
1
A: D-tagatose 3-epimerase
D: D-tagatose 3-epimerase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)65,4254
Polymers65,3152
Non-polymers1102
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
2
B: D-tagatose 3-epimerase
C: D-tagatose 3-epimerase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)65,4254
Polymers65,3152
Non-polymers1102
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)76.797, 94.899, 91.732
Angle α, β, γ (deg.)90.00, 102.81, 90.00
Int Tables number4
Space group name H-MP1211

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Components

#1: Protein
D-tagatose 3-epimerase


Mass: 32657.404 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Pseudomonas cichorii (bacteria) / Strain: ST-24 / Plasmid: pIK-01 / Production host: Escherichia coli (E. coli)
References: UniProt: O50580, Isomerases; Intramolecular oxidoreductases; Interconverting aldoses and ketoses, and related compounds
#2: Chemical
ChemComp-MN / MANGANESE (II) ION


Mass: 54.938 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Mn
#3: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 538 / 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: 2.49 Å3/Da / Density % sol: 50.69 %
Crystal growTemperature: 298 K / Method: vapor diffusion, sitting drop / pH: 7.5
Details: 20% PEG 10000, 0.1M HEPES, 0.01M strontium chloride, pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 298.0K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: Photon Factory / Beamline: BL-6A / Wavelength: 0.978 Å
DetectorType: ADSC QUANTUM 4 / Detector: CCD / Date: Oct 24, 2006
RadiationMonochromator: GRAPHITE / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.978 Å / Relative weight: 1
ReflectionResolution: 2.5→50 Å / Num. all: 44731 / Num. obs: 44731 / % possible obs: 99.9 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 4.3 % / Biso Wilson estimate: 25.1 Å2 / Rmerge(I) obs: 0.086 / Net I/σ(I): 7.9
Reflection shellResolution: 2.5→2.59 Å / Redundancy: 4.3 % / Rmerge(I) obs: 0.29 / Mean I/σ(I) obs: 4.68 / Num. unique all: 4440 / % possible all: 100

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Processing

Software
NameVersionClassification
CNS1.1refinement
ADSCQuantumdata collection
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 2HK0

2hk0


Resolution: 2.5→42.8 Å / Rfactor Rfree error: 0.004 / Data cutoff high absF: 41062.97 / 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
Rfree0.255 4354 10.1 %RANDOM
Rwork0.199 ---
all0.206 42953 --
obs0.199 42953 96.4 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 45.692 Å2 / ksol: 0.402173 e/Å3
Displacement parametersBiso mean: 22.5 Å2
Baniso -1Baniso -2Baniso -3
1--8.95 Å20 Å21 Å2
2--11.67 Å20 Å2
3----2.72 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.37 Å0.27 Å
Luzzati d res low-5 Å
Luzzati sigma a0.37 Å0.23 Å
Refinement stepCycle: LAST / Resolution: 2.5→42.8 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms9128 0 4 538 9670
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.007
X-RAY DIFFRACTIONc_angle_deg1.3
X-RAY DIFFRACTIONc_dihedral_angle_d22.6
X-RAY DIFFRACTIONc_improper_angle_d0.82
LS refinement shellResolution: 2.5→2.66 Å / Rfactor Rfree error: 0.012 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.316 722 10.6 %
Rwork0.237 6094 -
obs--92.4 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1protein_rep.paramprotein.top
X-RAY DIFFRACTION2water_rep.paramwater.top
X-RAY DIFFRACTION3ion.paramion.top

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