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- PDB-1jz8: E. COLI (lacZ) BETA-GALACTOSIDASE (E537Q) IN COMPLEX WITH ALLOLACTOSE -

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Basic information

Entry
Database: PDB / ID: 1jz8
TitleE. COLI (lacZ) BETA-GALACTOSIDASE (E537Q) IN COMPLEX WITH ALLOLACTOSE
ComponentsBeta-Galactosidase
KeywordsHYDROLASE / TIM BARREL (ALPHA/BETA BARREL) / JELLY-ROLL BARREL / IMMUNOGLOBULIN / BETA SUPERSANDWICH
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 / Glycosyl hydrolases family 2 signature 1. ...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 / Glycoside hydrolase family 2, catalytic domain / Glycosyl hydrolases family 2, TIM barrel domain / Glycoside hydrolase, family 2, immunoglobulin-like beta-sandwich / Glycosyl hydrolases family 2, sugar binding domain / Glycosyl hydrolases family 2 / Glycosyl hydrolases family 2, sugar binding domain / 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 / Immunoglobulins / TIM Barrel / Alpha-Beta Barrel / Immunoglobulin-like fold / Immunoglobulin-like / Sandwich / Mainly Beta / Alpha Beta
Similarity search - Domain/homology
beta-allolactose / beta-D-glucopyranose / D(-)-TARTARIC ACID / Beta-galactosidase
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.5 Å
AuthorsJuers, D.H. / Matthews, B.W.
Citation
Journal: Biochemistry / Year: 2001
Title: A Structural View of the Action of Escherichia Coli (Lacz) Beta-Galactosidase
Authors: Juers, D.H. / Heightman, T.D. / Vasella, A. / McCarter, J.D. / Mackenzie, L. / Withers, S.G. / Matthews, B.W.
#1: Journal: Protein Sci. / Year: 2000
Title: High Resolution Structure of Beta-Galactosidase in a New Crystal Form Reveals Multiple Metal-Binding Sites and Provides a Structural Basis for Alpha-Complementation
Authors: Juers, D.H. / Jacobson, R.H. / Wigley, D. / Zhang, X.J. / Huber, R.E. / Tronrud, D.E. / Matthews, B.W.
#2: Journal: Protein Sci. / Year: 1999
Title: Structural Comparisons of Tim Barrel Proteins Suggest Functional and Evolutionary Relationships between Beta-Galactosidase and Other Glycohydrolases
Authors: Juers, D.H. / Huber, R.E. / Matthews, B.W.
#3: Journal: Nature / Year: 1994
Title: Three-Dimensional Structure of Beta-Galactosidase from E. Coli
Authors: Jacobson, R.H. / Zhang, X.J. / Dubose, R.F. / Matthews, B.W.
#4: Journal: J.Mol.Biol. / Year: 1992
Title: Crystallization of beta-galactosidase from Escherichia coli
Authors: Jacobson, R.H. / Matthews, B.W.
History
DepositionSep 13, 2001Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 7, 2001Provider: repository / Type: Initial release
Revision 1.1Apr 27, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Oct 4, 2017Group: Advisory / Refinement description / Category: pdbx_unobs_or_zero_occ_atoms / software
Item: _pdbx_unobs_or_zero_occ_atoms.label_asym_id / _software.classification / _software.name
Revision 2.0Jul 29, 2020Group: Advisory / Atomic model ...Advisory / Atomic model / Data collection / Database references / Derived calculations / Non-polymer description / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / database_PDB_caveat / 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 / pdbx_unobs_or_zero_occ_atoms / pdbx_validate_chiral / pdbx_validate_close_contact / 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_alt_id / _atom_site.label_asym_id / _atom_site.label_atom_id / _atom_site.label_comp_id / _atom_site.label_entity_id / _atom_site.occupancy / _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 / _pdbx_entity_nonpoly.comp_id / _pdbx_entity_nonpoly.entity_id / _pdbx_entity_nonpoly.name / _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 / _pdbx_validate_chiral.auth_asym_id / _pdbx_validate_chiral.auth_atom_id / _pdbx_validate_chiral.auth_comp_id / _pdbx_validate_chiral.auth_seq_id / _pdbx_validate_close_contact.auth_asym_id_1 / _pdbx_validate_close_contact.auth_atom_id_1 / _pdbx_validate_close_contact.auth_atom_id_2 / _pdbx_validate_close_contact.auth_comp_id_1 / _pdbx_validate_close_contact.auth_comp_id_2 / _pdbx_validate_close_contact.auth_seq_id_1 / _struct_asym.entity_id / _struct_ref_seq_dif.details
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Oct 27, 2021Group: Database references / Structure summary / Category: chem_comp / database_2 / struct_ref_seq_dif
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI ..._chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_ref_seq_dif.details
Revision 2.2Aug 16, 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

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)478,400169
Polymers466,0214
Non-polymers12,379165
Water81,4824523
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)149.390, 168.710, 200.860
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, 4 molecules ABCD

#1: Protein
Beta-Galactosidase / / E.C.3.2.1.23 / LACTASE / lacZ / beta-d-galactosidase


Mass: 116505.281 Da / Num. of mol.: 4 / Mutation: E537Q
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli) / Gene: lacZ / Plasmid: pET15B / Production host: Escherichia coli (E. coli) / Strain (production host): JM109 / References: UniProt: P00722, beta-galactosidase

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Sugars , 2 types, 5 molecules

#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
#6: Sugar ChemComp-BGC / beta-D-glucopyranose / beta-D-glucose / D-glucose / glucose / Glucose


Type: D-saccharide, beta linking / Mass: 180.156 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Formula: C6H12O6
IdentifierTypeProgram
DGlcpbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
b-D-glucopyranoseCOMMON NAMEGMML 1.0
b-D-GlcpIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Non-polymers , 5 types, 4683 molecules

#3: Chemical
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 16 / 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 / Dimethyl sulfoxide


Mass: 78.133 Da / Num. of mol.: 127 / Source method: obtained synthetically / Formula: C2H6OS / Comment: DMSO, precipitant*YM
#7: Chemical ChemComp-TAR / D(-)-TARTARIC ACID / Tartaric acid


Mass: 150.087 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C4H6O6
#8: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 4523 / 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: 2.7 Å3/Da / Density % sol: 55 %
Crystal growTemperature: 288 K / Method: vapor diffusion, hanging drop / pH: 6.5
Details: Bis-Tris, PEG 8000, MgCl2, NaCl, DTT, pH 6.5, VAPOR DIFFUSION, HANGING DROP at 288K, pH 6.50
Crystal grow
*PLUS
pH: 6.5 / Method: vapor diffusion
Details: used macroseeding, Juers, D.H., (2000) Protein Sci., 9, 1685.
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDDetailsChemical formula
120 mg/mlprotein1drop
2100 mMBis-Tris1droppH6.5
3200 mM1dropMgCl2
41 mMdithiothreitol1drop
55 mM1dropNaCl
610 %PEG80001reservoir
7100 mMbis-Tris1reservoirpH6.5
8200 mM1reservoirMgCl2
9100 mM1reservoirNaCl
1010 mMdithiothreitol1reservoir

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: SSRL / Beamline: BL9-2 / Wavelength: 0.979,1.00
DetectorType: MARRESEARCH / Detector: IMAGE PLATE / Date: Jan 21, 1999
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelength
IDWavelength (Å)Relative weight
10.9791
211
ReflectionResolution: 1.5→18 Å / Num. obs: 777574 / % possible obs: 97.2 % / Redundancy: 2.6 % / Biso Wilson estimate: 11.4 Å2 / Rmerge(I) obs: 0.054 / Net I/σ(I): 12.4
Reflection shellHighest resolution: 1.5 Å / Rmerge(I) obs: 0.25 / Mean I/σ(I) obs: 3.2 / % possible all: 85
Reflection
*PLUS
% possible obs: 99 %
Reflection shell
*PLUS
Mean I/σ(I) obs: 3.2

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Processing

Software
NameVersionClassification
TNTrefinement
MAR345data collection
MOSFLMdata reduction
CCP4(SCALA)data scaling
TNTphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 1DP0

1dp0


Resolution: 1.5→18 Å / Isotropic thermal model: ISOTROPIC / Cross valid method: THROUGHOUT / Stereochemistry target values: TNT
RfactorNum. reflection% reflectionSelection details
Rfree0.208 11387 1.5 %RANDOM
Rwork0.165 ---
all-777574 --
obs-777574 97.2 %-
Solvent computationSolvent model: BABINET PRINCIPLE / Bsol: 213 Å2 / ksol: 0.74 e/Å3
Displacement parametersBiso mean: 18.4 Å2
Baniso -1Baniso -2Baniso -3
1--0.2 Å20 Å20 Å2
2--1.3 Å20 Å2
3----1.1 Å2
Refinement stepCycle: LAST / Resolution: 1.5→18 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms32512 0 650 4523 37685
Refine LS restraints
Refine-IDTypeDev idealNumberWeight
X-RAY DIFFRACTIONt_bond_d0.019339771
X-RAY DIFFRACTIONt_angle_deg2.686459851.7
X-RAY DIFFRACTIONt_dihedral_angle_d17.3193120
X-RAY DIFFRACTIONt_incorr_chiral_ct00
X-RAY DIFFRACTIONt_pseud_angle1
X-RAY DIFFRACTIONt_trig_c_planes0.0179161.7
X-RAY DIFFRACTIONt_gen_planes0.02448764.5
X-RAY DIFFRACTIONt_it6.6335960
X-RAY DIFFRACTIONt_nbd0.1436510
Refinement
*PLUS
Rfactor obs: 0.165
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Refine-IDTypeDev idealWeight
X-RAY DIFFRACTIONt_angle_deg2.7
X-RAY DIFFRACTIONt_planar_d0.0171.7
X-RAY DIFFRACTIONt_plane_restr0.0244.5

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