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- PDB-1mxg: Crystal Structure of a (Ca,Zn)-dependent alpha-amylase from the h... -

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Basic information

Entry
Database: PDB / ID: 1mxg
TitleCrystal Structure of a (Ca,Zn)-dependent alpha-amylase from the hyperthermophilic archaeon Pyrococcus woesei in complex with acarbose
Componentsalpha amylase
KeywordsHYDROLASE / alpha-amylase / hyperthermostable / family 13 glycosyl hydrolase / (beta/alpha)8-barrel
Function / homology
Function and homology information


alpha-amylase / alpha-amylase activity / carbohydrate metabolic process / calcium ion binding
Similarity search - Function
Alpha-amylase, thermostable / Alpha-amylase C-terminal, prokaryotic / Alpha-amylase C-terminal / Alpha amylase / Alpha amylase, catalytic domain / Glycosyl hydrolase, family 13, catalytic domain / Alpha-amylase domain / Golgi alpha-mannosidase II / Glycosyl hydrolase, all-beta / Glycosidases ...Alpha-amylase, thermostable / Alpha-amylase C-terminal, prokaryotic / Alpha-amylase C-terminal / Alpha amylase / Alpha amylase, catalytic domain / Glycosyl hydrolase, family 13, catalytic domain / Alpha-amylase domain / Golgi alpha-mannosidase II / Glycosyl hydrolase, all-beta / Glycosidases / Glycoside hydrolase superfamily / TIM Barrel / Alpha-Beta Barrel / Immunoglobulin-like / Sandwich / Mainly Beta / Alpha Beta
Similarity search - Domain/homology
alpha-acarbose / ETHANOL / Chem-ETE / Alpha-amylase / Alpha amylase
Similarity search - Component
Biological speciesPyrococcus woesei (archaea)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.6 Å
AuthorsLinden, A. / Mayans, O. / Meyer-Klaucke, W. / Antranikian, G. / Wilmanns, M.
CitationJournal: J.Biol.Chem. / Year: 2003
Title: Differential Regulation of a Hyperthermophilic alpha-Amylase with a Novel (Ca,Zn) Two-metal Center by Zinc
Authors: Linden, A. / Mayans, O. / Meyer-Klaucke, W. / Antranikian, G. / Wilmanns, M.
History
DepositionOct 2, 2002Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jun 10, 2003Provider: repository / Type: Initial release
Revision 1.1Apr 28, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Non-polymer description / Version format compliance
Revision 2.0Jul 29, 2020Group: Advisory / Atomic model ...Advisory / Atomic model / Data collection / Derived calculations / Non-polymer description / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / diffrn_source / 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_symm_contact / struct_conn / struct_conn_type / 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_atom_id / _atom_site.label_comp_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 / _diffrn_source.pdbx_synchrotron_site / _entity.formula_weight / _entity.pdbx_description / _entity.type / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.value / _pdbx_unobs_or_zero_occ_atoms.auth_asym_id / _pdbx_unobs_or_zero_occ_atoms.auth_atom_id / _pdbx_unobs_or_zero_occ_atoms.auth_comp_id / _pdbx_unobs_or_zero_occ_atoms.auth_seq_id / _pdbx_unobs_or_zero_occ_atoms.label_atom_id / _pdbx_unobs_or_zero_occ_atoms.label_comp_id / _pdbx_unobs_or_zero_occ_atoms.label_seq_id / _pdbx_validate_symm_contact.auth_asym_id_2 / _pdbx_validate_symm_contact.auth_atom_id_2 / _pdbx_validate_symm_contact.auth_comp_id_2 / _pdbx_validate_symm_contact.auth_seq_id_2
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Sep 9, 2020Group: Structure summary / Category: chem_comp / struct / Item: _chem_comp.pdbx_synonyms / _struct.title
Revision 2.2Oct 30, 2024Group: Data collection / Database references ...Data collection / Database references / Refinement description / Structure summary
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_entry_details / pdbx_initial_refinement_model / pdbx_modification_feature
Item: _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: alpha amylase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)53,06716
Polymers50,2291
Non-polymers2,83815
Water9,170509
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)51.480, 76.507, 136.455
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, 4 molecules A

#1: Protein alpha amylase


Mass: 50228.676 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Pyrococcus woesei (archaea) / Plasmid: pET15b / Species (production host): Escherichia coli / Production host: Escherichia coli BL21(DE3) (bacteria) / Strain (production host): Bl21(DE3)
References: UniProt: O08452, UniProt: Q7LYT7*PLUS, alpha-amylase
#2: Polysaccharide 4,6-dideoxy-4-{[(1S,4R,5S,6S)-4,5,6-trihydroxy-3-(hydroxymethyl)cyclohex-2-en-1-yl]amino}-alpha-D- ...4,6-dideoxy-4-{[(1S,4R,5S,6S)-4,5,6-trihydroxy-3-(hydroxymethyl)cyclohex-2-en-1-yl]amino}-alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose / alpha-acarbose


Type: oligosaccharide, Oligosaccharide / Class: Inhibitor / Mass: 645.606 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Details: oligosaccharide / References: alpha-acarbose
DescriptorTypeProgram
WURCS=2.0/2,3,2/[a2122h-1a_1-5][a2122m-1a_1-5_4*NC^SC^SC^SC^RCCO/7=^ZC$3/6O/5O/4O]/1-1-2/a4-b1_b4-c1WURCSPDB2Glycan 1.1.0
[][a-D-Glcp]{[(4+1)][a-D-Glcp]{[(4+1)][a-D-6-deoxy-Glcp4N]{[(4+1)][<C7O4>]{}}}}LINUCSPDB-CARE

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Non-polymers , 7 types, 521 molecules

#3: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Zn
#4: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Ca
#5: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: Mg
#6: Chemical ChemComp-ETE / 2-{2-[2-2-(METHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHANOL


Mass: 208.252 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C9H20O5
#7: Chemical ChemComp-TRS / 2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL / TRIS BUFFER


Mass: 122.143 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C4H12NO3 / Comment: pH buffer*YM
#8: Chemical
ChemComp-EOH / ETHANOL


Mass: 46.068 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C2H6O
#9: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 509 / Source method: isolated from a natural source / Formula: H2O

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Details

Has protein modificationY

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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: 2.67 Å3/Da / Density % sol: 54 %
Crystal growTemperature: 298 K / Method: vapor diffusion, hanging drop / pH: 8.5
Details: ethanol, tris, magnesium chloride, pH 8.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Crystal grow
*PLUS
Method: vapor diffusion, hanging drop
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDDetailsChemical formula
111 mg/mlprotein1drop
20.1 MTris1reservoirpH8.5
30.05 M1reservoirMgCl2
440 %(v/v)ethanol1reservoir

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: EMBL/DESY, HAMBURG / Beamline: BW7B / Wavelength: 0.8453 Å
DetectorType: MARRESEARCH / Detector: IMAGE PLATE / Date: Apr 5, 2001
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.8453 Å / Relative weight: 1
ReflectionResolution: 1.52→68.23 Å / Num. all: 75292 / Num. obs: 75292 / % possible obs: 89.8 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 8.5 % / Biso Wilson estimate: 13.895 Å2 / Rmerge(I) obs: 0.04 / Net I/σ(I): 39.9
Reflection
*PLUS
Lowest resolution: 99 Å / Rmerge(I) obs: 0.04
Reflection shell
*PLUS
Highest resolution: 1.52 Å / Lowest resolution: 1.55 Å / % possible obs: 69 % / Rmerge(I) obs: 0.209 / Mean I/σ(I) obs: 6.1

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Processing

Software
NameClassification
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: pdb entry 1MWO

1mwo


Resolution: 1.6→20 Å / Isotropic thermal model: isotropic / Cross valid method: THROUGHOUT / σ(F): 0 / σ(I): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.172 1196 -RANDOM
Rwork0.159 ---
obs0.159 67069 93.3 %-
all-67069 --
Displacement parametersBiso mean: 18.3 Å2
Baniso -1Baniso -2Baniso -3
1--1.233 Å20 Å20 Å2
2---2.352 Å20 Å2
3---3.586 Å2
Refinement stepCycle: LAST / Resolution: 1.6→20 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3574 0 169 509 4252
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.005
X-RAY DIFFRACTIONc_angle_deg1.27
Xplor file
Refine-IDSerial noParam file
X-RAY DIFFRACTION1protein_rep.param
X-RAY DIFFRACTION2water_rep.param
X-RAY DIFFRACTION3ion.param
X-RAY DIFFRACTION4acr_prodr.param
X-RAY DIFFRACTION5PEG.param
X-RAY DIFFRACTION6tris.param
X-RAY DIFFRACTION7etoh_xplor.param
Refinement
*PLUS
Solvent computation
*PLUS
Displacement parameters
*PLUS

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