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- PDB-4duw: E. coli (lacZ) beta-galactosidase (G974A) in complex with allolactose -

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Basic information

Entry
Database: PDB / ID: 4duw
TitleE. coli (lacZ) beta-galactosidase (G974A) in complex with allolactose
ComponentsBeta-galactosidase
KeywordsHYDROLASE / bi-functional enzyme / allolactose synthesis / TIM BARREL (ALPHA/BETA BARREL) / JELLY-ROLL BARREL / IMMUNOGLOBULIN / BETA SUPERSANDWICH / BETA-GALACTOSIDASE / GLYCOSIDASE
Function / homology
Function and homology information


alkali metal ion binding / lactose catabolic process / beta-galactosidase complex / beta-galactosidase / beta-galactosidase activity / carbohydrate binding / magnesium ion binding / identical protein binding
Similarity search - Function
Glycoside hydrolase, family 2, beta-galactosidase / Beta galactosidase small chain/ domain 5 / Beta-galactosidase, domain 4 / Beta galactosidase small chain / Beta-galactosidase, domain 4 / Beta galactosidase small chain / : / Glycoside hydrolase, family 2, active site / Glycosyl hydrolases family 2 acid/base catalyst. / Glycoside hydrolase, family 2, conserved site ...Glycoside hydrolase, family 2, beta-galactosidase / Beta galactosidase small chain/ domain 5 / Beta-galactosidase, domain 4 / Beta galactosidase small chain / Beta-galactosidase, domain 4 / Beta galactosidase small chain / : / Glycoside hydrolase, family 2, active site / Glycosyl hydrolases family 2 acid/base catalyst. / Glycoside hydrolase, family 2, conserved site / Glycosyl hydrolases family 2 signature 1. / Beta-galactosidase; Chain A, domain 5 - #10 / Glycoside hydrolase, family 2 / Glycosyl hydrolases family 2, sugar binding domain / Glycoside hydrolase family 2, catalytic domain / Glycosyl hydrolases family 2, sugar binding domain / Glycosyl hydrolases family 2, TIM barrel domain / Glycoside hydrolase, family 2, immunoglobulin-like beta-sandwich / Glycosyl hydrolases family 2 / Beta-Galactosidase/glucuronidase domain superfamily / Glycoside hydrolase-type carbohydrate-binding / Beta-galactosidase; Chain A, domain 5 / Galactose mutarotase-like domain superfamily / Galactose-binding domain-like / Galactose-binding-like domain superfamily / Distorted Sandwich / Glycosidases / Glycoside hydrolase superfamily / Jelly Rolls / TIM Barrel / Alpha-Beta Barrel / Immunoglobulin-like fold / Immunoglobulins / Immunoglobulin-like / Sandwich / Mainly Beta / Alpha Beta
Similarity search - Domain/homology
beta-allolactose / Beta-galactosidase
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
MethodX-RAY DIFFRACTION / SYNCHROTRON / FOURIER SYNTHESIS / Resolution: 2.2 Å
AuthorsWheatley, R.W. / Lo, S. / Janzcewicz, L.J. / Dugdale, M.L. / Huber, R.E.
CitationJournal: J.Biol.Chem. / Year: 2013
Title: Structural Explanation for Allolactose (lac operon inducer) Synthesis by lacZ beta-Galactosidase and the Evolutionary Relationship between Allolactose synthesis and the lac Repressor
Authors: Wheatley, R.W. / Lo, S. / Jancewicz, L.J. / Dugdale, M.L. / Huber, R.E.
History
DepositionFeb 22, 2012Deposition site: RCSB / Processing site: RCSB
Revision 1.0Mar 20, 2013Provider: repository / Type: Initial release
Revision 1.1Jul 10, 2013Group: Database references
Revision 1.2Jul 17, 2019Group: Data collection / Refinement description / Category: software
Item: _software.classification / _software.name / _software.version
Revision 2.0Jul 29, 2020Group: Atomic model / Data collection ...Atomic model / Data collection / Database references / Derived calculations / Non-polymer description / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / entity / entity_name_com / pdbx_branch_scheme / pdbx_chem_comp_identifier / pdbx_entity_branch / pdbx_entity_branch_descriptor / pdbx_entity_branch_link / pdbx_entity_branch_list / pdbx_entity_nonpoly / pdbx_molecule_features / pdbx_nonpoly_scheme / pdbx_struct_conn_angle / struct_asym / struct_conn / struct_conn_type / struct_ref_seq_dif / struct_site / struct_site_gen
Item: _atom_site.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_asym_id / _atom_site.auth_atom_id / _atom_site.auth_comp_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _atom_site.label_atom_id / _atom_site.label_comp_id / _atom_site.label_entity_id / _atom_site.type_symbol / _chem_comp.formula / _chem_comp.formula_weight / _chem_comp.id / _chem_comp.mon_nstd_flag / _chem_comp.name / _chem_comp.pdbx_synonyms / _chem_comp.type / _entity.formula_weight / _entity.pdbx_description / _entity.type / _pdbx_struct_conn_angle.ptnr1_auth_asym_id / _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.ptnr2_auth_asym_id / _pdbx_struct_conn_angle.ptnr2_auth_comp_id / _pdbx_struct_conn_angle.ptnr2_auth_seq_id / _pdbx_struct_conn_angle.ptnr2_label_asym_id / _pdbx_struct_conn_angle.ptnr2_label_atom_id / _pdbx_struct_conn_angle.ptnr2_label_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_asym_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_asym.entity_id / _struct_ref_seq_dif.details
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Sep 13, 2023Group: Data collection / Database references ...Data collection / Database references / Refinement description / Structure summary
Category: chem_comp / chem_comp_atom ...chem_comp / chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model
Item: _chem_comp.pdbx_synonyms / _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: Beta-galactosidase
B: Beta-galactosidase
C: Beta-galactosidase
D: Beta-galactosidase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)487,027111
Polymers479,0314
Non-polymers7,996107
Water65,0343610
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)151.826, 162.635, 203.692
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number19
Space group name H-MP212121

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Components

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Protein / Sugars , 2 types, 8 molecules ABCD

#1: Protein
Beta-galactosidase / Beta-gal / Lactase


Mass: 119757.773 Da / Num. of mol.: 4 / Fragment: unp residues 10-1024 / Mutation: G794A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli) / Strain: K12 / Gene: b0344, JW0335, lacA, lacZ / Plasmid: pBAD/HIS/LacZ / Production host: Escherichia coli (E. coli) / Strain (production host): LMG194 / References: UniProt: P00722, beta-galactosidase
#2: Polysaccharide
beta-D-galactopyranose-(1-6)-beta-D-glucopyranose / beta-allolactose


Type: oligosaccharide, Oligosaccharide / Class: Inducer / Mass: 342.297 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Details: oligosaccharide / References: beta-allolactose
DescriptorTypeProgram
DGalpb1-6DGlcpb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/2,2,1/[a2122h-1b_1-5][a2112h-1b_1-5]/1-2/a6-b1WURCSPDB2Glycan 1.1.0
[][b-D-Glcp]{[(6+1)][b-D-Galp]{}}LINUCSPDB-CARE

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Non-polymers , 4 types, 3713 molecules

#3: Chemical
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 10 / Source method: obtained synthetically / Formula: Mg
#4: Chemical
ChemComp-NA / SODIUM ION


Mass: 22.990 Da / Num. of mol.: 16 / Source method: obtained synthetically / Formula: Na
#5: Chemical...
ChemComp-DMS / DIMETHYL SULFOXIDE


Mass: 78.133 Da / Num. of mol.: 77 / Source method: obtained synthetically / Formula: C2H6OS / Comment: DMSO, precipitant*YM
#6: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 3610 / 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: 2.62 Å3/Da / Density % sol: 53.14 %
Crystal growTemperature: 288 K / Method: vapor diffusion, hanging drop / pH: 6.5
Details: 10% PEG 8000, 100 MM BIS-TRIS, 200 MM MGCL2, 100 MM NACL, 10 MM DTT , pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 288K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: CLSI / Beamline: 08B1-1 / Wavelength: 1.11589 Å
DetectorType: ADSC QUANTUM 315 / Detector: CCD / Date: Aug 1, 2007
RadiationMonochromator: ACCEL/BRUKER double crystal monochromator (Si(111))
Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.11589 Å / Relative weight: 1
ReflectionResolution: 2.2→24.81 Å / Num. all: 235634 / Num. obs: 235634 / % possible obs: 92.6 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 3.9 % / Biso Wilson estimate: 27.9 Å2 / Rmerge(I) obs: 0.077 / Net I/σ(I): 10
Reflection shellResolution: 2.2→2.32 Å / Redundancy: 1.8 % / Rmerge(I) obs: 0.283 / Mean I/σ(I) obs: 2.3 / Num. unique all: 24540 / % possible all: 66.6

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Processing

Software
NameVersionClassification
REFMAC5.5.0109refinement
CNSrefinement
ADSCQuantumdata collection
MOSFLMdata reduction
SCALAdata scaling
CNSphasing
RefinementMethod to determine structure: FOURIER SYNTHESIS
Starting model: 3T0D

3t0d


Resolution: 2.2→24.81 Å / Cor.coef. Fo:Fc: 0.963 / Cor.coef. Fo:Fc free: 0.938 / SU B: 4.881 / SU ML: 0.122 / Cross valid method: THROUGHOUT / ESU R: 0.231 / ESU R Free: 0.187 / Stereochemistry target values: MAXIMUM LIKELIHOOD
RfactorNum. reflection% reflectionSelection details
Rfree0.21266 3378 1.4 %consistent with previous structures
Rwork0.15973 ---
all0.16047 232012 --
obs0.16047 232012 100 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.4 Å / Solvent model: BABINET MODEL WITH MASK
Displacement parametersBiso mean: 37 Å2
Baniso -1Baniso -2Baniso -3
1--0.29 Å20 Å20 Å2
2---0.41 Å20 Å2
3---0.7 Å2
Refinement stepCycle: LAST / Resolution: 2.2→24.81 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms32632 0 426 3610 36668
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0070.02133989
X-RAY DIFFRACTIONr_bond_other_d
X-RAY DIFFRACTIONr_angle_refined_deg1.0811.93546219
X-RAY DIFFRACTIONr_angle_other_deg
X-RAY DIFFRACTIONr_dihedral_angle_1_deg6.04754056
X-RAY DIFFRACTIONr_dihedral_angle_2_deg36.21123.7441752
X-RAY DIFFRACTIONr_dihedral_angle_3_deg12.902155180
X-RAY DIFFRACTIONr_dihedral_angle_4_deg15.25415264
X-RAY DIFFRACTIONr_chiral_restr0.0730.24901
X-RAY DIFFRACTIONr_gen_planes_refined0.0040.02126664
X-RAY DIFFRACTIONr_gen_planes_other
X-RAY DIFFRACTIONr_nbd_refined
X-RAY DIFFRACTIONr_nbd_other
X-RAY DIFFRACTIONr_nbtor_refined
X-RAY DIFFRACTIONr_nbtor_other
X-RAY DIFFRACTIONr_xyhbond_nbd_refined
X-RAY DIFFRACTIONr_xyhbond_nbd_other
X-RAY DIFFRACTIONr_metal_ion_refined
X-RAY DIFFRACTIONr_metal_ion_other
X-RAY DIFFRACTIONr_symmetry_vdw_refined
X-RAY DIFFRACTIONr_symmetry_vdw_other
X-RAY DIFFRACTIONr_symmetry_hbond_refined
X-RAY DIFFRACTIONr_symmetry_hbond_other
X-RAY DIFFRACTIONr_symmetry_metal_ion_refined
X-RAY DIFFRACTIONr_symmetry_metal_ion_other
X-RAY DIFFRACTIONr_mcbond_it2.218220375
X-RAY DIFFRACTIONr_mcbond_other
X-RAY DIFFRACTIONr_mcangle_it3.3952.532850
X-RAY DIFFRACTIONr_scbond_it5.0213.513614
X-RAY DIFFRACTIONr_scangle_it6.8854.513369
X-RAY DIFFRACTIONr_rigid_bond_restr
X-RAY DIFFRACTIONr_sphericity_free
X-RAY DIFFRACTIONr_sphericity_bonded
LS refinement shellResolution: 2.2→2.257 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.282 155 -
Rwork0.232 11070 -
obs--100 %

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