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- PDB-2a21: Aquifex aeolicus KDO8PS in complex with PEP, PO4, and Zn2+ -

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Basic information

Entry
Database: PDB / ID: 2a21
TitleAquifex aeolicus KDO8PS in complex with PEP, PO4, and Zn2+
Components2-dehydro-3-deoxyphosphooctonate aldolase
KeywordsTRANSFERASE
Function / homology
Function and homology information


monosaccharide biosynthetic process / 3-deoxy-8-phosphooctulonate synthase / 3-deoxy-8-phosphooctulonate synthase activity / keto-3-deoxy-D-manno-octulosonic acid biosynthetic process / cytosol
Similarity search - Function
3-deoxy-8-phosphooctulonate synthase / DAHP synthetase I/KDSA / DAHP synthetase I family / Aldolase class I / Aldolase-type TIM barrel / TIM Barrel / Alpha-Beta Barrel / Alpha Beta
Similarity search - Domain/homology
PHOSPHOENOLPYRUVATE / PHOSPHATE ION / 2-dehydro-3-deoxyphosphooctonate aldolase
Similarity search - Component
Biological speciesAquifex aeolicus (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / FOURIER SYNTHESIS / Resolution: 1.8 Å
AuthorsKona, F. / Xu, X. / Lu, J. / Martin, P. / Gatti, D.L.
CitationJournal: Biochemistry / Year: 2009
Title: Electronic structure of the metal center in the Cd(2+), Zn(2+), and Cu(2+) substituted forms of KDO8P synthase: implications for catalysis.
Authors: Kona, F. / Tao, P. / Martin, P. / Xu, X. / Gatti, D.L.
History
DepositionJun 21, 2005Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jun 20, 2006Provider: repository / Type: Initial release
Revision 1.1Apr 30, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Derived calculations / Version format compliance
Revision 1.3Oct 11, 2017Group: Refinement description / Category: software / Item: _software.classification / _software.name
Revision 1.4Feb 14, 2024Group: Data collection / Database references / Derived calculations
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_struct_conn_angle / struct_conn / 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_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: 2-dehydro-3-deoxyphosphooctonate aldolase
B: 2-dehydro-3-deoxyphosphooctonate aldolase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)60,2068
Polymers59,5492
Non-polymers6576
Water9,908550
1
A: 2-dehydro-3-deoxyphosphooctonate aldolase
B: 2-dehydro-3-deoxyphosphooctonate aldolase
hetero molecules

A: 2-dehydro-3-deoxyphosphooctonate aldolase
B: 2-dehydro-3-deoxyphosphooctonate aldolase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)120,41116
Polymers119,0984
Non-polymers1,31412
Water724
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation4_555y,x,-z1
Buried area16200 Å2
ΔGint-248 kcal/mol
Surface area33760 Å2
MethodPISA, PQS
Unit cell
Length a, b, c (Å)84.527, 84.527, 159.752
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number152
Space group name H-MP3121
Components on special symmetry positions
IDModelComponents
11A-472-

HOH

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Components

#1: Protein 2-dehydro-3-deoxyphosphooctonate aldolase / Phospho-2-dehydro-3-deoxyoctonate aldolase / 3-deoxy-D-manno-octulosonic acid 8-phosphate ...Phospho-2-dehydro-3-deoxyoctonate aldolase / 3-deoxy-D-manno-octulosonic acid 8-phosphate synthetase / KDO-8-phosphate synthetase / KDO 8-P synthase / KDOPS


Mass: 29774.406 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Aquifex aeolicus (bacteria) / Gene: kdsA / Plasmid: pet28a / Species (production host): Escherichia coli / Production host: Escherichia coli BL21(DE3) (bacteria) / Strain (production host): BL21(DE3)
References: UniProt: O66496, 3-deoxy-8-phosphooctulonate synthase
#2: Chemical ChemComp-PO4 / PHOSPHATE ION / Phosphate


Mass: 94.971 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: PO4
#3: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Zn
#4: Chemical ChemComp-PEP / PHOSPHOENOLPYRUVATE / Phosphoenolpyruvic acid


Mass: 168.042 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C3H5O6P
#5: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 550 / 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: 2.77 Å3/Da / Density % sol: 48.4 %
Crystal growTemperature: 277 K / Method: vapor diffusion, hanging drop / pH: 4.89
Details: PEG4K, Na acetate, pH 4.89, VAPOR DIFFUSION, HANGING DROP, temperature 277K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: APS / Beamline: 14-ID-B / Wavelength: 1 Å
DetectorType: MARRESEARCH / Detector: CCD / Date: Jul 21, 2003
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 1.8→40.9 Å / Num. obs: 61339 / Biso Wilson estimate: 21.2 Å2

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Processing

Software
NameVersionClassification
CNS1.1refinement
MAR345data collection
SCALEPACKdata scaling
RefinementMethod to determine structure: FOURIER SYNTHESIS / Resolution: 1.8→40.86 Å / Rfactor Rfree error: 0.003 / Data cutoff high absF: 204281.98 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0
RfactorNum. reflection% reflectionSelection details
Rfree0.21 5799 10.1 %RANDOM
Rwork0.184 ---
obs0.184 57525 93.2 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 54.183 Å2 / ksol: 0.325761 e/Å3
Displacement parametersBiso mean: 31.5 Å2
Baniso -1Baniso -2Baniso -3
1-3.91 Å22.2 Å20 Å2
2--3.91 Å20 Å2
3----7.82 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.23 Å0.2 Å
Luzzati d res low-5 Å
Luzzati sigma a0.2 Å0.2 Å
Refinement stepCycle: LAST / Resolution: 1.8→40.86 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4078 0 32 550 4660
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.005
X-RAY DIFFRACTIONc_angle_deg1.3
X-RAY DIFFRACTIONc_dihedral_angle_d22.4
X-RAY DIFFRACTIONc_improper_angle_d0.74
X-RAY DIFFRACTIONc_mcbond_it1.271.5
X-RAY DIFFRACTIONc_mcangle_it1.952
X-RAY DIFFRACTIONc_scbond_it2.062
X-RAY DIFFRACTIONc_scangle_it3.12.5
LS refinement shellResolution: 1.8→1.91 Å / Rfactor Rfree error: 0.01 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.277 772 9.6 %
Rwork0.262 7257 -
obs--78.9 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1protein_rep.paramprotein.top
X-RAY DIFFRACTION2ion.paramion.top
X-RAY DIFFRACTION3pep_a5p_mod5.parampep_a5p.toph
X-RAY DIFFRACTION4water_rep.paramwater.top

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