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- PDB-7ehi: Crystal structure of covalent maltosyl-alpha-glucosidase intermediate -

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Basic information

Entry
Database: PDB / ID: 7ehi
TitleCrystal structure of covalent maltosyl-alpha-glucosidase intermediate
Componentsalpha glucosidase
KeywordsHYDROLASE / glycoside hydrolase / maltooligosaccharides / carbohydrate metabolism / CARBOHYDRATE
Function / homologyImmunoglobulins / Immunoglobulin-like / Sandwich / Mainly Beta / alpha-maltose
Function and homology information
Biological speciesWeissella cibaria (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.69 Å
AuthorsKrusong, K. / Wangpaiboon, K. / Kim, S. / Mori, T. / Hakoshima, T.
Funding support Thailand, 1items
OrganizationGrant numberCountry
Other government Thailand
CitationJournal: Acta Crystallogr D Struct Biol / Year: 2021
Title: A GH13 alpha-glucosidase from Weissella cibaria uncommonly acts on short-chain maltooligosaccharides.
Authors: Wangpaiboon, K. / Laohawuttichai, P. / Kim, S.Y. / Mori, T. / Nakapong, S. / Pichyangkura, R. / Pongsawasdi, P. / Hakoshima, T. / Krusong, K.
History
DepositionMar 29, 2021Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Aug 11, 2021Provider: repository / Type: Initial release
Revision 1.1Aug 18, 2021Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_ISSN / _citation.pdbx_database_id_PubMed / _citation_author.identifier_ORCID / _citation_author.name
Revision 1.2Nov 29, 2023Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model
Revision 1.3Sep 17, 2025Group: Advisory / Data collection ...Advisory / Data collection / Derived calculations / Structure summary
Category: database_PDB_caveat / pdbx_entry_details ...database_PDB_caveat / pdbx_entry_details / pdbx_unobs_or_zero_occ_atoms / pdbx_validate_chiral / pdbx_validate_close_contact / struct_conn
Item: _pdbx_entry_details.has_protein_modification

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: alpha glucosidase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)70,02814
Polymers68,3991
Non-polymers1,62913
Water11,512639
1
A: alpha glucosidase
hetero molecules

A: alpha glucosidase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)140,05628
Polymers136,7972
Non-polymers3,25926
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation7_554y,x,-z-1/41
Buried area9150 Å2
ΔGint-127 kcal/mol
Surface area43140 Å2
MethodPISA
Unit cell
Length a, b, c (Å)116.566, 116.566, 107.181
Angle α, β, γ (deg.)90.000, 90.000, 90.000
Int Tables number91
Space group name H-MP4122
Space group name HallP4w2c
Symmetry operation#1: x,y,z
#2: -y,x,z+1/4
#3: y,-x,z+3/4
#4: x,-y,-z+1/2
#5: -x,y,-z
#6: -x,-y,z+1/2
#7: y,x,-z+3/4
#8: -y,-x,-z+1/4
Components on special symmetry positions
IDModelComponents
11A-607-

SO4

21A-1158-

HOH

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Components

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Protein / Sugars , 2 types, 2 molecules A

#1: Protein alpha glucosidase


Mass: 68398.617 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Weissella cibaria (bacteria) / Production host: Escherichia coli BL21(DE3) (bacteria) / Strain (production host): BL21(DE3) / References: alpha-glucosidase
#2: Polysaccharide alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose / alpha-maltose


Type: oligosaccharide, Oligosaccharide / Class: Nutrient / Mass: 342.297 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: oligosaccharide / References: alpha-maltose
DescriptorTypeProgram
DGlcpa1-4DGlcpa1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1a_1-5]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-Glcp]{[(4+1)][a-D-Glcp]{}}LINUCSPDB-CARE

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Non-polymers , 5 types, 651 molecules

#3: Chemical ChemComp-MES / 2-(N-MORPHOLINO)-ETHANESULFONIC ACID


Mass: 195.237 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C6H13NO4S / Comment: pH buffer*YM
#4: Chemical ChemComp-GOL / GLYCEROL / GLYCERIN / PROPANE-1,2,3-TRIOL


Mass: 92.094 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C3H8O3
#5: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Ca / Feature type: SUBJECT OF INVESTIGATION
#6: Chemical
ChemComp-SO4 / SULFATE ION


Mass: 96.063 Da / Num. of mol.: 7 / Source method: obtained synthetically / Formula: SO4
#7: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 639 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestY
Has protein modificationN
Sequence detailsTHE SEQUENCE OF THIS PROTEIN WAS NOT AVAILABLE AT THE UNIPROT KNOWLEDGEBASE DATABASE (UNIPROTKB) AT ...THE SEQUENCE OF THIS PROTEIN WAS NOT AVAILABLE AT THE UNIPROT KNOWLEDGEBASE DATABASE (UNIPROTKB) AT THE TIME OF DEPOSITION. AUTHORS STATE THAT THE GENEBANK ACCESSION NUMBER IS MG_256496 FOR THE PROTEIN.

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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: 2.66 Å3/Da / Density % sol: 53.79 %
Crystal growTemperature: 293 K / Method: vapor diffusion / Details: Ammonium sulfate, dioxane, MES

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Data collection

DiffractionMean temperature: 110 K / Serial crystal experiment: N
Diffraction sourceSource: SYNCHROTRON / Site: NSRRC / Beamline: BL13B1 / Wavelength: 1 Å
DetectorType: ADSC QUANTUM 315 / Detector: CCD / Date: Mar 6, 2019
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 1.69→50 Å / Num. obs: 82931 / % possible obs: 99.8 % / Redundancy: 6.9 % / Biso Wilson estimate: 13.61 Å2 / Rpim(I) all: 0.022 / Net I/σ(I): 38.67
Reflection shellResolution: 1.69→1.75 Å / Num. unique obs: 8063 / Rpim(I) all: 0.313

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Processing

Software
NameVersionClassification
REFMAC7.0.069refinement
PHENIX1.17_3644refinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 7D9B

7d9b


Resolution: 1.69→34.86 Å / SU ML: 0.144 / Cross valid method: FREE R-VALUE / σ(F): 1.35 / Phase error: 15.7608
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
RfactorNum. reflection% reflection
Rfree0.1767 4104 5 %
Rwork0.1509 77971 -
obs0.1522 82075 99.12 %
Solvent computationShrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å / Solvent model: FLAT BULK SOLVENT MODEL
Displacement parametersBiso mean: 17.61 Å2
Refinement stepCycle: LAST / Resolution: 1.69→34.86 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4811 0 94 639 5544
Refine LS restraints
Refine-IDTypeDev idealNumber
X-RAY DIFFRACTIONf_bond_d0.0145236
X-RAY DIFFRACTIONf_angle_d1.30637166
X-RAY DIFFRACTIONf_chiral_restr0.0872759
X-RAY DIFFRACTIONf_plane_restr0.008933
X-RAY DIFFRACTIONf_dihedral_angle_d9.3707729
LS refinement shell
Resolution (Å)Rfactor RfreeNum. reflection RfreeRfactor RworkNum. reflection RworkRefine-ID% reflection obs (%)
1.69-1.710.23871440.19632328X-RAY DIFFRACTION87.82
1.71-1.730.22281440.18022576X-RAY DIFFRACTION96.56
1.73-1.750.18741540.1762585X-RAY DIFFRACTION97.51
1.75-1.780.22461470.16482607X-RAY DIFFRACTION98.32
1.78-1.80.19111380.15752645X-RAY DIFFRACTION98.51
1.8-1.830.21531370.15942660X-RAY DIFFRACTION99.36
1.83-1.850.19331480.15542681X-RAY DIFFRACTION99.72
1.85-1.880.20691230.15012688X-RAY DIFFRACTION99.89
1.88-1.910.15611300.15352679X-RAY DIFFRACTION99.96
1.91-1.950.20881430.15162705X-RAY DIFFRACTION99.96
1.95-1.980.20071350.15382688X-RAY DIFFRACTION100
1.98-2.020.20691570.15852661X-RAY DIFFRACTION100
2.02-2.060.18531480.15262677X-RAY DIFFRACTION99.96
2.06-2.110.20081330.1472699X-RAY DIFFRACTION100
2.11-2.150.1941270.15032715X-RAY DIFFRACTION100
2.15-2.210.17491320.15512682X-RAY DIFFRACTION99.93
2.21-2.270.20381350.14782714X-RAY DIFFRACTION100
2.27-2.330.18941350.152716X-RAY DIFFRACTION99.93
2.33-2.410.18641460.14962693X-RAY DIFFRACTION100
2.41-2.50.17931340.15422717X-RAY DIFFRACTION99.86
2.5-2.60.19611370.16072726X-RAY DIFFRACTION99.97
2.6-2.710.1861670.1592679X-RAY DIFFRACTION99.96
2.71-2.860.18631560.15932711X-RAY DIFFRACTION100
2.86-3.040.17271600.16242711X-RAY DIFFRACTION99.97
3.04-3.270.19121810.15722695X-RAY DIFFRACTION99.83
3.27-3.60.13691390.13972774X-RAY DIFFRACTION99.76
3.6-4.120.11051290.12272781X-RAY DIFFRACTION99.73
4.12-5.190.14171040.12262851X-RAY DIFFRACTION99.73
5.19-34.860.16281410.17162927X-RAY DIFFRACTION98.11

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