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Basic information

Entry
Database: PDB / ID: 2cek
TitleConformational Flexibility in the Peripheral Site of Torpedo californica Acetylcholinesterase Revealed by the Complex Structure with a Bifunctional Inhibitor
ComponentsACETYLCHOLINESTERASE
KeywordsHYDROLASE / ALPHA/BETA HYDROLASE / SERINE ESTERASE / NEUROTRANSMITTER CLEAVAGE / SYNAPSE MEMBRANE / GLYCOPROTEIN / GPI-ANCHOR / ALZHEIMER DISEASE / CONFORMATIONAL FLEXIBILITY / ALTERNATIVE SPLICING / LIPOPROTEIN / NEUROTRANSMITTER DEGRADATION / SYNAPSE
Function / homology
Function and homology information


acetylcholine catabolic process in synaptic cleft / acetylcholinesterase / acetylcholinesterase activity / synaptic cleft / side of membrane / synapse / plasma membrane
Similarity search - Function
Acetylcholinesterase, fish/snake / Cholinesterase / Carboxylesterase type B, conserved site / Carboxylesterases type-B signature 2. / Carboxylesterase type B, active site / Carboxylesterases type-B serine active site. / Carboxylesterase, type B / Carboxylesterase family / Alpha/Beta hydrolase fold, catalytic domain / Alpha/Beta hydrolase fold ...Acetylcholinesterase, fish/snake / Cholinesterase / Carboxylesterase type B, conserved site / Carboxylesterases type-B signature 2. / Carboxylesterase type B, active site / Carboxylesterases type-B serine active site. / Carboxylesterase, type B / Carboxylesterase family / Alpha/Beta hydrolase fold, catalytic domain / Alpha/Beta hydrolase fold / Rossmann fold / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
Chem-N8T / TRIETHYLENE GLYCOL / Acetylcholinesterase
Similarity search - Component
Biological speciesTORPEDO CALIFORNICA (Pacific electric ray)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.2 Å
AuthorsSanson, B. / Colletier, J.P. / Nachon, F. / Gabellieri, E. / Fattorusso, C. / Campiani, G. / Weik, M.
CitationJournal: J. Am. Chem. Soc. / Year: 2006
Title: Conformational flexibility in the peripheral site of Torpedo californica acetylcholinesterase revealed by the complex structure with a bifunctional inhibitor.
Authors: Colletier, J.P. / Sanson, B. / Nachon, F. / Gabellieri, E. / Fattorusso, C. / Campiani, G. / Weik, M.
History
DepositionFeb 8, 2006Deposition site: PDBE / Processing site: PDBE
Revision 1.0Apr 10, 2006Provider: repository / Type: Initial release
Revision 1.1May 8, 2011Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 2.0Jul 25, 2018Group: 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 / citation / database_PDB_caveat / entity / pdbx_entity_nonpoly / pdbx_nonpoly_scheme / pdbx_validate_chiral / struct_asym / struct_conn
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_atom_id / _atom_site.auth_comp_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.type / _citation.journal_abbrev / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.title / _pdbx_nonpoly_scheme.entity_id / _pdbx_nonpoly_scheme.mon_id / _pdbx_nonpoly_scheme.pdb_mon_id / _struct_asym.entity_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_label_comp_id
Revision 2.1May 8, 2019Group: Data collection / Derived calculations / Experimental preparation
Category: exptl_crystal_grow / struct_conn
Item: _exptl_crystal_grow.temp / _struct_conn.pdbx_leaving_atom_flag
Revision 3.0Jul 29, 2020Group: Atomic model / Data collection ...Atomic model / Data collection / Derived calculations / Other / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / entity / pdbx_branch_scheme / pdbx_chem_comp_identifier / pdbx_database_status / pdbx_entity_branch / pdbx_entity_branch_descriptor / pdbx_entity_branch_link / pdbx_entity_branch_list / pdbx_entity_nonpoly / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / pdbx_struct_special_symmetry / struct_asym / struct_conn / 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_seq_id / _atom_site.label_asym_id / _atom_site.label_entity_id / _chem_comp.name / _chem_comp.type / _pdbx_database_status.status_code_sf / _pdbx_entity_nonpoly.entity_id / _pdbx_entity_nonpoly.name / _pdbx_struct_assembly_gen.asym_id_list / _pdbx_struct_special_symmetry.label_asym_id / _struct_conn.pdbx_role / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 3.1May 12, 2021Group: Derived calculations / Structure summary
Category: chem_comp / pdbx_struct_assembly ...chem_comp / pdbx_struct_assembly / pdbx_struct_assembly_gen / pdbx_struct_oper_list
Item: _chem_comp.pdbx_synonyms / _pdbx_struct_assembly.details ..._chem_comp.pdbx_synonyms / _pdbx_struct_assembly.details / _pdbx_struct_assembly.method_details / _pdbx_struct_assembly.oligomeric_count / _pdbx_struct_assembly.oligomeric_details
Revision 3.2Dec 13, 2023Group: Data collection / Database references / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model
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: ACETYLCHOLINESTERASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)62,94411
Polymers60,5621
Non-polymers2,38210
Water11,890660
1
A: ACETYLCHOLINESTERASE
hetero molecules

A: ACETYLCHOLINESTERASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)125,46421
Polymers121,1252
Non-polymers4,33919
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation4_556y,x,-z+11
Unit cell
Length a, b, c (Å)111.940, 111.940, 137.120
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number152
Space group name H-MP3121
Components on special symmetry positions
IDModelComponents
11A-2276-

HOH

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Components

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Protein , 1 types, 1 molecules A

#1: Protein ACETYLCHOLINESTERASE / / ACHE


Mass: 60562.297 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) TORPEDO CALIFORNICA (Pacific electric ray)
Organ: ELECTRIC ORGAN / Variant: G2 FORM / Tissue: ELECTROPLAQUE / References: UniProt: P04058, acetylcholinesterase

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Sugars , 2 types, 3 molecules

#2: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}LINUCSPDB-CARE
#3: Sugar ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE / N-Acetylglucosamine


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Non-polymers , 4 types, 667 molecules

#4: Chemical ChemComp-N8T / N-[8-(1,2,3,4-TETRAHYDROACRIDIN-9-YLTHIO)OCTYL]-1,2,3,4-TETRAHYDROACRIDIN-9-AMINE / N-(1,2,3,4-TETRAHYDROACRIDIN-9-YL)-8-[(1,2,3,4-TETRAHYDROACRIDIN-9-YL)THIO]-O CTAN-1-AMINE


Mass: 523.774 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C34H41N3S
#5: Chemical ChemComp-MES / 2-(N-MORPHOLINO)-ETHANESULFONIC ACID / MES (buffer)


Mass: 195.237 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C6H13NO4S / Comment: pH buffer*YM
#6: Chemical
ChemComp-PGE / TRIETHYLENE GLYCOL / Polyethylene glycol


Mass: 150.173 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C6H14O4
#7: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 660 / Source method: isolated from a natural source / Formula: H2O

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Details

Compound detailsRAPIDLY HYDROLYZES CHOLINE RELEASED INTO THE SYNAPSE

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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: 3.8 Å3/Da / Density % sol: 68 % / Description: NONE
Crystal growTemperature: 277 K / pH: 6
Details: 32% PEG200, 150MM MES, PH6.0, 4DEG. C. 12 HOURS OF SOAKING WITH A PUTATIVE ANTI-ALZHEIMER DRUG.

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: ESRF / Beamline: ID14-2 / Wavelength: 0.932
DetectorType: ADSC QUANTUM 4 / Detector: CCD / Date: Feb 10, 2005
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.932 Å / Relative weight: 1
ReflectionResolution: 2.2→20 Å / Num. obs: 50867 / % possible obs: 99.9 % / Observed criterion σ(I): 3 / Redundancy: 4.92 % / Biso Wilson estimate: 27.1 Å2 / Rmerge(I) obs: 0.06 / Net I/σ(I): 16.18
Reflection shellResolution: 2.2→2.33 Å / Redundancy: 4.98 % / Rmerge(I) obs: 0.39 / Mean I/σ(I) obs: 3.36 / % possible all: 99.9

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Processing

Software
NameVersionClassification
CNS1.1refinement
XDSdata reduction
XSCALEdata scaling
CNSphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 1EA5

1ea5


Resolution: 2.2→20 Å / Rfactor Rfree error: 0.004 / Data cutoff high absF: 3339666.63 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0 / Details: BULK SOLVENT MODEL USED
RfactorNum. reflection% reflectionSelection details
Rfree0.206 2537 5 %RANDOM
Rwork0.175 ---
obs0.175 50867 99.9 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 75.5944 Å2 / ksol: 0.360481 e/Å3
Displacement parametersBiso mean: 43 Å2
Baniso -1Baniso -2Baniso -3
1-8.26 Å24.93 Å20 Å2
2--8.26 Å20 Å2
3----16.52 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.27 Å0.22 Å
Luzzati d res low-5 Å
Luzzati sigma a0.34 Å0.3 Å
Refinement stepCycle: LAST / Resolution: 2.2→20 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4245 0 158 660 5063
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.006
X-RAY DIFFRACTIONc_bond_d_na
X-RAY DIFFRACTIONc_bond_d_prot
X-RAY DIFFRACTIONc_angle_d
X-RAY DIFFRACTIONc_angle_d_na
X-RAY DIFFRACTIONc_angle_d_prot
X-RAY DIFFRACTIONc_angle_deg1.3
X-RAY DIFFRACTIONc_angle_deg_na
X-RAY DIFFRACTIONc_angle_deg_prot
X-RAY DIFFRACTIONc_dihedral_angle_d22.4
X-RAY DIFFRACTIONc_dihedral_angle_d_na
X-RAY DIFFRACTIONc_dihedral_angle_d_prot
X-RAY DIFFRACTIONc_improper_angle_d0.86
X-RAY DIFFRACTIONc_improper_angle_d_na
X-RAY DIFFRACTIONc_improper_angle_d_prot
X-RAY DIFFRACTIONc_mcbond_it1.191.5
X-RAY DIFFRACTIONc_mcangle_it1.872
X-RAY DIFFRACTIONc_scbond_it2.072
X-RAY DIFFRACTIONc_scangle_it3.032.5
LS refinement shellResolution: 2.2→2.34 Å / Rfactor Rfree error: 0.015 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.3 402 4.8 %
Rwork0.272 7982 -
obs--100 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PROTEIN_REP.PARAMPROTEIN.TOP
X-RAY DIFFRACTION2CARBOHYDRATE.PARAMCARBOHYDRATE.TOP
X-RAY DIFFRACTION3WATER_REP.PARAMWATER.TOP
X-RAY DIFFRACTION4LIG.PARAMLIG.TOP

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