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- PDB-1l7k: x-ray structure of galactose mutarotase from Lactococcus lactis c... -

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Basic information

Entry
Database: PDB / ID: 1l7k
Titlex-ray structure of galactose mutarotase from Lactococcus lactis complexed with galactose
Componentsgalactose mutarotase
KeywordsISOMERASE / mutarotase / epimerase / galactose metabolism
Function / homology
Function and homology information


aldose 1-epimerase / aldose 1-epimerase activity / galactose catabolic process via UDP-galactose, Leloir pathway / glucose metabolic process / carbohydrate binding / cytoplasm
Similarity search - Function
Aldose 1-epimerase, bacterial / Aldose 1-epimerase / : / Aldose 1-/Glucose-6-phosphate 1-epimerase / Aldose 1-epimerase / Beta-galactosidase; Chain A, domain 5 - #10 / Glycoside hydrolase-type carbohydrate-binding / Beta-galactosidase; Chain A, domain 5 / Galactose mutarotase-like domain superfamily / Distorted Sandwich / Mainly Beta
Similarity search - Domain/homology
alpha-D-galactopyranose / Aldose 1-epimerase
Similarity search - Component
Biological speciesLactococcus lactis (lactic acid bacteria)
MethodX-RAY DIFFRACTION / FOURIER SYNTHESIS / Resolution: 1.95 Å
AuthorsHolden, H.M. / Thoden, J.B.
CitationJournal: J.Biol.Chem. / Year: 2002
Title: High resolution X-ray structure of galactose mutarotase from Lactococcus lactis.
Authors: Thoden, J.B. / Holden, H.M.
History
DepositionMar 15, 2002Deposition site: RCSB / Processing site: RCSB
Revision 1.0Apr 24, 2002Provider: repository / Type: Initial release
Revision 1.1Apr 28, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Oct 11, 2017Group: Refinement description / Category: software / Item: _software.classification
Revision 1.4Jul 29, 2020Group: Advisory / Data collection ...Advisory / Data collection / Database references / Derived calculations / Structure summary
Category: chem_comp / database_PDB_caveat ...chem_comp / database_PDB_caveat / entity / pdbx_chem_comp_identifier / pdbx_entity_nonpoly / pdbx_struct_conn_angle / struct_conn / struct_ref_seq_dif / struct_site / struct_site_gen
Item: _chem_comp.name / _chem_comp.type ..._chem_comp.name / _chem_comp.type / _entity.pdbx_description / _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.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_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_asym_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_ref_seq_dif.details
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 1.5Oct 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 1.6Aug 16, 2023Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model
Remark 600HETEROGEN THE O1 ATOM OF GAL HAS TWO ALTERNATE POSITIONS. ALTERNATE POSITION A IS FOR ALPHA-D- ...HETEROGEN THE O1 ATOM OF GAL HAS TWO ALTERNATE POSITIONS. ALTERNATE POSITION A IS FOR ALPHA-D-GALACTOSE. ALTERNATE POSITION B IS FOR BETA-D-GALACTOSE.

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: galactose mutarotase
B: galactose mutarotase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)77,6295
Polymers77,2462
Non-polymers3833
Water8,143452
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)45.200, 76.500, 211.600
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number19
Space group name H-MP212121

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Components

#1: Protein galactose mutarotase / aldose 1-epimerase


Mass: 38622.957 Da / Num. of mol.: 2 / Mutation: E2S
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Lactococcus lactis (lactic acid bacteria)
Gene: GALM / Plasmid: pET28 / Production host: Escherichia coli (E. coli) / Strain (production host): Rosetta / References: UniProt: Q9ZB17, aldose 1-epimerase
#2: Sugar ChemComp-GLA / alpha-D-galactopyranose / alpha-D-galactose / D-galactose / galactose / ALPHA D-GALACTOSE


Type: D-saccharide, alpha linking / Mass: 180.156 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Formula: C6H12O6
IdentifierTypeProgram
DGalpaCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
a-D-galactopyranoseCOMMON NAMEGMML 1.0
a-D-GalpIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GalSNFG CARBOHYDRATE SYMBOLGMML 1.0
#3: Chemical ChemComp-NA / SODIUM ION


Mass: 22.990 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Na
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 452 / 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: 2.37 Å3/Da / Density % sol: 48.04 %
Crystal growTemperature: 277 K / Method: vapor diffusion, hanging drop / pH: 6
Details: PEG-5000-O-Methylether, sodium chloride, MES, pH 6.0, VAPOR DIFFUSION, HANGING DROP, temperature 277K
Crystal grow
*PLUS
Temperature: 4 ℃
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDDetails
115-19 %PEG5000-OMe1reservoir
2100 mMMES1reservoirpH6.0
317.5 mg/mlenzyme1drop

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Data collection

DiffractionMean temperature: 277 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RU200 / Wavelength: 1.54178 Å
DetectorType: SIEMENS HI-STAR / Detector: AREA DETECTOR / Date: Jan 26, 2002 / Details: goebel mirrors
RadiationMonochromator: goebel optics / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.54178 Å / Relative weight: 1
ReflectionResolution: 1.95→30 Å / Num. all: 51652 / Num. obs: 51652 / % possible obs: 94.3 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 2.9 % / Rsym value: 0.063 / Net I/σ(I): 12
Reflection shellResolution: 1.95→2.03 Å / Redundancy: 1.8 % / Mean I/σ(I) obs: 3.4 / Num. unique all: 5042 / Rsym value: 0.225 / % possible all: 74.2
Reflection
*PLUS
Rmerge(I) obs: 0.063
Reflection shell
*PLUS
% possible obs: 74.2 % / Num. unique obs: 5042 / Rmerge(I) obs: 0.225

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Processing

Software
NameClassification
TNTrefinement
FRAMBOdata collection
SAINTdata scaling
TNTphasing
RefinementMethod to determine structure: FOURIER SYNTHESIS
Starting model: PDB ENTRY 1L7J

1l7j


Resolution: 1.95→30 Å / σ(F): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.216 5081 -RANDOM
Rwork0.157 ---
all0.161 51652 --
obs0.161 51652 94.2 %-
Refinement stepCycle: LAST / Resolution: 1.95→30 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms5381 0 27 452 5860
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONt_angle_deg2.1
X-RAY DIFFRACTIONt_bond_d0.013
Refinement
*PLUS
Num. reflection obs: 46551 / Rfactor obs: 0.157
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONt_dihedral_angle_d
X-RAY DIFFRACTIONt_dihedral_angle_deg18.8
X-RAY DIFFRACTIONt_planar_d0.006
X-RAY DIFFRACTIONt_plane_restr0.012

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