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- PDB-2xf3: Structural and mechanistic studies on a cephalosporin esterase fr... -

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Basic information

Entry
Database: PDB / ID: 2xf3
TitleStructural and mechanistic studies on a cephalosporin esterase from the clavulanic acid biosynthesis pathway
ComponentsORF12
KeywordsHYDROLASE
Function / homology
Function and homology information


beta-lactam antibiotic catabolic process / beta-lactamase activity / response to antibiotic
Similarity search - Function
ORF12 helical bundle domain-like / Nuclear Transport Factor 2; Chain: A, - #280 / ORF 12 gene product, N-terminal / ORF 12 gene product N-terminal / Beta-lactamase class A, catalytic domain / Beta-lactamase enzyme family / Beta-lactamase, class-A / Nuclear Transport Factor 2; Chain: A, / Helicase, Ruva Protein; domain 3 / Beta-lactamase ...ORF12 helical bundle domain-like / Nuclear Transport Factor 2; Chain: A, - #280 / ORF 12 gene product, N-terminal / ORF 12 gene product N-terminal / Beta-lactamase class A, catalytic domain / Beta-lactamase enzyme family / Beta-lactamase, class-A / Nuclear Transport Factor 2; Chain: A, / Helicase, Ruva Protein; domain 3 / Beta-lactamase / DD-peptidase/beta-lactamase superfamily / Beta-lactamase/transpeptidase-like / Roll / Orthogonal Bundle / 3-Layer(aba) Sandwich / Mainly Alpha / Alpha Beta
Similarity search - Domain/homology
Chem-J01 / Beta-lactamase / Uncharacterized protein
Similarity search - Component
Biological speciesSTREPTOMYCES CLAVULIGERUS (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.55 Å
AuthorsIqbal, A. / Valegard, K. / Kershaw, N.J. / Ivison, D. / Genereux, C. / Dubus, A. / Andersson, I. / Schofield, C.J.
CitationJournal: Acta Crystallogr. D Biol. Crystallogr. / Year: 2013
Title: Structural and mechanistic studies of the orf12 gene product from the clavulanic acid biosynthesis pathway.
Authors: Valegard, K. / Iqbal, A. / Kershaw, N.J. / Ivison, D. / Genereux, C. / Dubus, A. / Blikstad, C. / Demetriades, M. / Hopkinson, R.J. / Lloyd, A.J. / Roper, D.I. / Schofield, C.J. / Andersson, I. / McDonough, M.A.
History
DepositionMay 20, 2010Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jun 29, 2011Provider: repository / Type: Initial release
Revision 1.1Jul 31, 2013Group: Database references / Other ...Database references / Other / Refinement description / Version format compliance
Revision 1.2Aug 7, 2013Group: Database references
Revision 1.3Feb 21, 2018Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.page_last / _citation.title / _citation_author.name
Revision 1.4Dec 20, 2023Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Other / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_database_status / 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 / _pdbx_database_status.status_code_sf / _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: ORF12
B: ORF12
hetero molecules


Theoretical massNumber of molelcules
Total (without water)100,6006
Polymers99,8032
Non-polymers7974
Water20,5191139
1
A: ORF12
hetero molecules


Theoretical massNumber of molelcules
Total (without water)50,3003
Polymers49,9021
Non-polymers3982
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
MethodPISA
2
B: ORF12
hetero molecules


Theoretical massNumber of molelcules
Total (without water)50,3003
Polymers49,9021
Non-polymers3982
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
MethodPISA
Unit cell
Length a, b, c (Å)61.588, 100.827, 81.233
Angle α, β, γ (deg.)90.00, 93.97, 90.00
Int Tables number4
Space group name H-MP1211

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Components

#1: Protein ORF12 / CEPHALOSPORIN ESTERASE


Mass: 49901.594 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Details: 2 MOLECULES OF CLAVULANIC ACID ARE BOUND PER SUBUNIT
Source: (gene. exp.) STREPTOMYCES CLAVULIGERUS (bacteria) / Production host: ESCHERICHIA COLI (E. coli) / Strain (production host): BL21(DE3) / References: UniProt: Q83Z62, UniProt: Q8KRB7*PLUS
#2: Chemical
ChemComp-J01 / (2R,3Z,5R)-3-(2-HYDROXYETHYLIDENE)-7-OXO-4-OXA-1-AZABICYCLO[3.2.0]HEPTANE-2-CARBOXYLIC ACID / CLAVULANIC ACID


Mass: 199.161 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C8H9NO5
#3: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 1139 / 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: 2.5 Å3/Da / Density % sol: 51 % / Description: NONE
Crystal growpH: 8
Details: 13%(W/V) PEG 4000, 0.1M NAAC, 0.1M NACL, 10% GLYCEROL, 0.1M TRIS/HCL PH 8.0

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: ESRF / Beamline: ID14-4 / Wavelength: 0.9755
DetectorDate: Jul 8, 2005
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.9755 Å / Relative weight: 1
ReflectionResolution: 1.55→35 Å / Num. obs: 139836 / % possible obs: 97.5 % / Observed criterion σ(I): 0 / Redundancy: 5.5 % / Rmerge(I) obs: 0.08
Reflection shellResolution: 1.55→1.61 Å / Redundancy: 5.1 % / Rmerge(I) obs: 0.25 / % possible all: 99.8

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Processing

Software
NameVersionClassification
REFMAC5.2.0019refinement
DENZOdata reduction
SCALEPACKdata scaling
REFMACphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 2XEP

2xep


Resolution: 1.55→81.65 Å / Cor.coef. Fo:Fc: 0.954 / Cor.coef. Fo:Fc free: 0.943 / SU B: 1.221 / SU ML: 0.046 / Cross valid method: THROUGHOUT / ESU R: 0.082 / ESU R Free: 0.081 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS.
RfactorNum. reflection% reflectionSelection details
Rfree0.20968 6996 5 %RANDOM
Rwork0.18687 ---
obs0.18804 132657 97.2 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK
Displacement parametersBiso mean: 17.077 Å2
Baniso -1Baniso -2Baniso -3
1--0.29 Å20 Å20.03 Å2
2--0.75 Å20 Å2
3----0.45 Å2
Refinement stepCycle: LAST / Resolution: 1.55→81.65 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms6549 0 56 1139 7744
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0080.0216754
X-RAY DIFFRACTIONr_bond_other_d
X-RAY DIFFRACTIONr_angle_refined_deg1.5871.9739197
X-RAY DIFFRACTIONr_angle_other_deg
X-RAY DIFFRACTIONr_dihedral_angle_1_deg5.1425848
X-RAY DIFFRACTIONr_dihedral_angle_2_deg29.62422.753287
X-RAY DIFFRACTIONr_dihedral_angle_3_deg11.412151087
X-RAY DIFFRACTIONr_dihedral_angle_4_deg15.2731563
X-RAY DIFFRACTIONr_chiral_restr0.0840.21045
X-RAY DIFFRACTIONr_gen_planes_refined0.0050.025135
X-RAY DIFFRACTIONr_gen_planes_other
X-RAY DIFFRACTIONr_nbd_refined0.1970.23161
X-RAY DIFFRACTIONr_nbd_other
X-RAY DIFFRACTIONr_nbtor_refined0.3040.24694
X-RAY DIFFRACTIONr_nbtor_other
X-RAY DIFFRACTIONr_xyhbond_nbd_refined0.1130.2888
X-RAY DIFFRACTIONr_xyhbond_nbd_other
X-RAY DIFFRACTIONr_metal_ion_refined
X-RAY DIFFRACTIONr_metal_ion_other
X-RAY DIFFRACTIONr_symmetry_vdw_refined0.1370.252
X-RAY DIFFRACTIONr_symmetry_vdw_other
X-RAY DIFFRACTIONr_symmetry_hbond_refined0.10.238
X-RAY DIFFRACTIONr_symmetry_hbond_other
X-RAY DIFFRACTIONr_symmetry_metal_ion_refined
X-RAY DIFFRACTIONr_symmetry_metal_ion_other
X-RAY DIFFRACTIONr_mcbond_it0.7491.54305
X-RAY DIFFRACTIONr_mcbond_other
X-RAY DIFFRACTIONr_mcangle_it1.20226784
X-RAY DIFFRACTIONr_mcangle_other
X-RAY DIFFRACTIONr_scbond_it1.94832744
X-RAY DIFFRACTIONr_scbond_other
X-RAY DIFFRACTIONr_scangle_it3.0254.52405
X-RAY DIFFRACTIONr_scangle_other
X-RAY DIFFRACTIONr_long_range_B_refined
X-RAY DIFFRACTIONr_long_range_B_other
X-RAY DIFFRACTIONr_rigid_bond_restr
X-RAY DIFFRACTIONr_sphericity_free
X-RAY DIFFRACTIONr_sphericity_bonded
LS refinement shellResolution: 1.548→1.588 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.253 521 -
Rwork0.216 9685 -
obs--96.34 %

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